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Dr. STAVROS KALAITZIDIS
Department of Geology, University of Patras, Rion, 26500, Patras, Greece

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0 Economic Geology
0 Mineral Exploration
0 coal geology
0 Peat
0 Peatlands geology

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Journal article
Published: 28 January 2021 in Minerals
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In this study, the features of fly ashes originating from industrial-scale high volatile bituminous coal combustion and co-combustion of coal with 10% admixture of alternative fuel SRF (solid recovered fuel) are presented, with emphasis on the organic petrographical characteristics. The organic petrographical and mineralogical data are co-evaluated with geochemical data, with the aim to provide a full classification of the studied fly ashes, as well as base information toward any potential application of this waste material, according to the recycling economy principles. By applying organic petrographical methods, the assignment of the carbon-rich residuals to the respective feed fuel, either coal or SRF, can be achieved. The obtained quantitative evaluation provides useful information regarding the combustion conditions in the stoker boiler. The analyzed fly ashes contain significant C-residuals, mostly in the form of fused, dense, and anisotropic particles, while the enrichment in sooty particles is caused due to the addition of SRF fuel. In conjunction with the moderate-low content of potential hazardous elements, the features of the contained C-residual phases suggest that these fly ashes could possibly be the subject of further studies for their applicability as soil improvements.

ACS Style

Małgorzata Wojtaszek; Ryszard Wasielewski; Stavros Kalaitzidis. Organic Petrographical Features of Fly Ashes Originating from Coal and Coal-SRF Co-Combustion. Minerals 2021, 11, 128 .

AMA Style

Małgorzata Wojtaszek, Ryszard Wasielewski, Stavros Kalaitzidis. Organic Petrographical Features of Fly Ashes Originating from Coal and Coal-SRF Co-Combustion. Minerals. 2021; 11 (2):128.

Chicago/Turabian Style

Małgorzata Wojtaszek; Ryszard Wasielewski; Stavros Kalaitzidis. 2021. "Organic Petrographical Features of Fly Ashes Originating from Coal and Coal-SRF Co-Combustion." Minerals 11, no. 2: 128.

Original paper
Published: 06 January 2021 in Arabian Journal of Geosciences
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Fifteen samples of the Lower Cretaceous Balambo Formation from three sections in the Zagros Fold-Thrust Belt, Kurdistan Region of northern Iraq have been studied by means of organic petrography, in order to assess the type and the thermal maturity of the contained organic matter. The microscopic study revealed that most of the samples are poor in primary macerals but do contain frequent solid hydrocarbons. In terms of macerals, only bituminite-like particles, vitrinite, both indigenous and reworked, and fusinite are observed; additionally, three types of solid hydrocarbons occur, these of microgranular and homogenous migrabitumen, as well as pyrobitumen. The equivalent vitrinite reflectance (Eq.VR. %) of solid microgranular migrabitumen of the Baraw section ranges between 0.55 and 0.68%, of the Bn-1 section between 0.58 and 0.73%, and for the Sazan section, the Eq.VR. % value is 0.58%. The Eq.VR. % for solid homogenous migrabitumen was calculated for the Baraw and Sazan sections samples, ranging from 0.68 to 0.72% and from 0.65 to 0.67%, respectively, whereas the Eq.VR. % for the pyrobitumens of Baranan-1.G1 ranges from 0.87 to 0.96%. These values indicate that the organic matter of the Balambo Formation in the studied sections reached early mature to mature stage, and possibly, liquid hydrocarbons were generated.

ACS Style

Razawa H. A. Sarraj; Ibrahim M. J. Mohialdeen; Stavros Kalaitzidis. Organic petrographical features and thermal maturity assessment of the Cretaceous Balambo Formation from Zagros Fold-Thrust Belt, Kurdistan Region, Northern Iraq. Arabian Journal of Geosciences 2021, 14, 1 -11.

AMA Style

Razawa H. A. Sarraj, Ibrahim M. J. Mohialdeen, Stavros Kalaitzidis. Organic petrographical features and thermal maturity assessment of the Cretaceous Balambo Formation from Zagros Fold-Thrust Belt, Kurdistan Region, Northern Iraq. Arabian Journal of Geosciences. 2021; 14 (1):1-11.

Chicago/Turabian Style

Razawa H. A. Sarraj; Ibrahim M. J. Mohialdeen; Stavros Kalaitzidis. 2021. "Organic petrographical features and thermal maturity assessment of the Cretaceous Balambo Formation from Zagros Fold-Thrust Belt, Kurdistan Region, Northern Iraq." Arabian Journal of Geosciences 14, no. 1: 1-11.

Journal article
Published: 07 November 2020 in International Journal of Coal Geology
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Upper Jurassic Naokelekan Formation, being part of the intercepted strata of the well-known Miran oilfield in Kurdistan region of Northern Iraq, has been previously extensively evaluated as a potential/effective source rock, mainly by means of organic geochemistry. In the present study, a total of 60 samples were collected from four Naokelekan Fm. outcrops, those of Banik, Galy-Derash, Barsarin and Dwawa, in order to conduct organic petrographical study and organic geochemical assessment, including both biomarker and Rock-Eval analyses. The average recorded TOC content for Banik, Galy-Derash, Barsarin and Dwawa section is considerable to very high, corresponding to values of 27.5, 9.0, 3.5 and 5.2 wt%, respectively, with the highest values representing the notably organic-rich bottom part of the Formation, known as “coal layer”. According to the petrographical analysis, solid migrabitumens comprise the predominant component for all the analysed samples, whereas the maceral groups of vitrinite, liptinite and/or inertinite showcase a minor to trace occurrence. In terms of organic geochemistry, each of the four sections of interest shows a different biomarker profile. Nevertheless, a number of calculated parameters related to kerogen type and depositional conditions, including the isoprenoids/n-alkanes ratios, suggest a mixed terrestrial-marine organic matter. Furthermore, as indicated by the Ro (%) measurements along with Rock-Eval parameters and the vitrinite reflectance equivalent based on aromatic compounds, the maturity level is marginally mature in the cases of Banik and Galy-Derash, whereas in the cases of Dwawa and Barsarin sections it is mature to post-mature. A synthesis of the organic petrography and geochemical appraisal applied in the present study, suggests that the reported solid hydrocarbons in Naokelekan Fm., particularly at its basal layers are non-indigenous/migrated and the precursor organic matter was deposited in a marine environment, under oscillating conditions ranging from euxinic to well‑oxygenated. Accordingly, the organic features of the notably bitumen-rich “coal-bed” fit the profile of a reservoir and/or migration path.

ACS Style

M.E. Damoulianou; K.Y. Kolo; A.G. Borrego; S.P. Kalaitzidis. Organic petrological and geochemical appraisal of the Upper Jurassic Naokelekan Formation, Kurdistan, Iraq. International Journal of Coal Geology 2020, 232, 103637 .

AMA Style

M.E. Damoulianou, K.Y. Kolo, A.G. Borrego, S.P. Kalaitzidis. Organic petrological and geochemical appraisal of the Upper Jurassic Naokelekan Formation, Kurdistan, Iraq. International Journal of Coal Geology. 2020; 232 ():103637.

Chicago/Turabian Style

M.E. Damoulianou; K.Y. Kolo; A.G. Borrego; S.P. Kalaitzidis. 2020. "Organic petrological and geochemical appraisal of the Upper Jurassic Naokelekan Formation, Kurdistan, Iraq." International Journal of Coal Geology 232, no. : 103637.

Journal article
Published: 17 February 2020 in Bulletin of the Geological Society of Greece
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The aim of this study is to assess the type, thermal maturity and the petroleum generation potential of the Upper Jurassic Naokelekan Formation, occurring across the Kurdistan Region of Iraq, by applying organic petrographical methods and Rock-Eval analysis. The Rock-Eval data would indicate the presence of kerogen types III, IV and II as the main constituents. However, the qualitative petrographical evaluation revealed that the main organic constituents are solid hydrocarbons, in the form of microgranular migrabitumens, with minor amounts of pyrobitumens. These secondary particles have affected the results of the Rock-Eval analysis and would have led to misinterpretation of organic matter typification based on pyrolysis results only. The combined results of petrography and pyrolysis indicate an active petroleum system within the Upper Jurassic sequence, where hydrocarbons are generated and reservoired within suitable lithologies.

ACS Style

Rzger Abdula; Kamal Kolo; Maria-Elli Damoulianou; Victoria Raftopoulou; Polla Khanaqa; Stavros Kalaitzidis. Rock-Eval analysis and organic petrographical characterization of the Upper Jurassic Naokelekan Formation, northern Mesopotamian basin, Kurdistan Region-Iraq. Bulletin of the Geological Society of Greece 2020, 56, 187 -203.

AMA Style

Rzger Abdula, Kamal Kolo, Maria-Elli Damoulianou, Victoria Raftopoulou, Polla Khanaqa, Stavros Kalaitzidis. Rock-Eval analysis and organic petrographical characterization of the Upper Jurassic Naokelekan Formation, northern Mesopotamian basin, Kurdistan Region-Iraq. Bulletin of the Geological Society of Greece. 2020; 56 (1):187-203.

Chicago/Turabian Style

Rzger Abdula; Kamal Kolo; Maria-Elli Damoulianou; Victoria Raftopoulou; Polla Khanaqa; Stavros Kalaitzidis. 2020. "Rock-Eval analysis and organic petrographical characterization of the Upper Jurassic Naokelekan Formation, northern Mesopotamian basin, Kurdistan Region-Iraq." Bulletin of the Geological Society of Greece 56, no. 1: 187-203.

Journal article
Published: 18 December 2019 in Marine and Petroleum Geology
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An interlaboratory study (ILS) was conducted to test reproducibility of vitrinite and solid bitumen reflectance measurements in six mudrock samples from United States unconventional source-rock reservoir petroleum systems. Samples selected from the Marcellus, Haynesville, Eagle Ford, Barnett, Bakken and Woodford are representative of resource plays currently under exploitation in North America. All samples are from marine depositional environments, are thermally mature (Tmax >445 °C) and have moderate to high organic matter content (2.9–11.6 wt% TOC). Their organic matter is dominated by solid bitumen, which contains intraparticle nano-porosity. Visual evaluation of organic nano-porosity (pore sizes < 100 nm) via SEM suggests that intraparticle organic nano-pores are most abundant in dry gas maturity samples and less abundant at lower wet gas/condensate and peak oil maturities. Samples were distributed to ILS participants in forty laboratories in the Americas, Europe, Africa and Australia; thirty-seven independent sets of results were received. Mean vitrinite reflectance (VRo) values from all ILS participants range from 0.90 to 1.83% whereas mean solid bitumen reflectance (BRo) values range from 0.85 to 2.04% (no outlying values excluded), confirming the thermally mature nature of all six samples. Using multiple statistical approaches to eliminate outlying values, we evaluated reproducibility limit R, the maximum difference between valid mean reflectance results obtained on the same sample by different operators in different laboratories using different instruments. Removal of outlying values where the individual signed multiple of standard deviation was >1.0 produced lowest R values, generally ≤0.5% (absolute reflectance), similar to a prior ILS for similar samples. Other traditional approaches to outlier removal (outside mean ± 1.5*interquartile range and outside F10 to F90 percentile range) also produced similar R values. Standard deviation values < 0.15*(VRo or BRo) reduce R and should be a requirement of dispersed organic matter reflectance analysis. After outlier removal, R values were 0.1%–0.2% for peak oil thermal maturity, about 0.3% for wet gas/condensate maturity and 0.4%–0.5% for dry gas maturity. That is, these R values represent the uncertainty (in absolute reflectance) that users of vitrinite and solid bitumen reflectance data should assign to any one individual reported mean reflectance value from a similar thermal maturity mudrock sample. R values of this magnitude indicate a need for further standardization of reflectance measurement of dispersed organic matter. Furthermore, these R values quantify realistic interlaboratory measurement dispersion for a difficult but critically important analytical technique necessary for thermal maturity determination in the source-rock reservoirs of unconventional petroleum systems.

ACS Style

Paul C. Hackley; Carla V. Araujo; Angeles G. Borrego; Antonis Bouzinos; Brian J. Cardott; Humberto Carvajal-Ortiz; Martha Rocio López Cely; Vongani Chabalala; Peter J. Crosdale; Thomas D. Demchuk; Cortland F. Eble; Deolinda Flores; Agnieszka Furmann; Thomas Gentzis; Paula A. Gonçalves; Carsten Guvad; Mária Hámor-Vidó; Iwona Jelonek; Michelle N. Johnston; Tatiana Juliao-Lemus; Stavros Kalaitzidis; Wayne R. Knowles; Jolanta Kus; Zhongsheng Li; Gordon Macleod; Maria Mastalerz; Taíssa R. Menezes; Seare Ocubalidet; Richard Orban; Walter Pickel; Paddy Ranasinghe; Joana Ribeiro; Olga Patricia Gómez Rojas; Ricardo Ruiz-Monroy; Jaques Schmidt; Abbas Seyedolali; Georgios Siavalas; Isabel Suarez-Ruiz; Carlos Vargas Vargas; Brett J. Valentine; Nicola Wagner; Bree Wrolson; Julian Esteban Jaramillo Zapata. Testing reproducibility of vitrinite and solid bitumen reflectance measurements in North American unconventional source-rock reservoir petroleum systems. Marine and Petroleum Geology 2019, 114, 104172 .

AMA Style

Paul C. Hackley, Carla V. Araujo, Angeles G. Borrego, Antonis Bouzinos, Brian J. Cardott, Humberto Carvajal-Ortiz, Martha Rocio López Cely, Vongani Chabalala, Peter J. Crosdale, Thomas D. Demchuk, Cortland F. Eble, Deolinda Flores, Agnieszka Furmann, Thomas Gentzis, Paula A. Gonçalves, Carsten Guvad, Mária Hámor-Vidó, Iwona Jelonek, Michelle N. Johnston, Tatiana Juliao-Lemus, Stavros Kalaitzidis, Wayne R. Knowles, Jolanta Kus, Zhongsheng Li, Gordon Macleod, Maria Mastalerz, Taíssa R. Menezes, Seare Ocubalidet, Richard Orban, Walter Pickel, Paddy Ranasinghe, Joana Ribeiro, Olga Patricia Gómez Rojas, Ricardo Ruiz-Monroy, Jaques Schmidt, Abbas Seyedolali, Georgios Siavalas, Isabel Suarez-Ruiz, Carlos Vargas Vargas, Brett J. Valentine, Nicola Wagner, Bree Wrolson, Julian Esteban Jaramillo Zapata. Testing reproducibility of vitrinite and solid bitumen reflectance measurements in North American unconventional source-rock reservoir petroleum systems. Marine and Petroleum Geology. 2019; 114 ():104172.

Chicago/Turabian Style

Paul C. Hackley; Carla V. Araujo; Angeles G. Borrego; Antonis Bouzinos; Brian J. Cardott; Humberto Carvajal-Ortiz; Martha Rocio López Cely; Vongani Chabalala; Peter J. Crosdale; Thomas D. Demchuk; Cortland F. Eble; Deolinda Flores; Agnieszka Furmann; Thomas Gentzis; Paula A. Gonçalves; Carsten Guvad; Mária Hámor-Vidó; Iwona Jelonek; Michelle N. Johnston; Tatiana Juliao-Lemus; Stavros Kalaitzidis; Wayne R. Knowles; Jolanta Kus; Zhongsheng Li; Gordon Macleod; Maria Mastalerz; Taíssa R. Menezes; Seare Ocubalidet; Richard Orban; Walter Pickel; Paddy Ranasinghe; Joana Ribeiro; Olga Patricia Gómez Rojas; Ricardo Ruiz-Monroy; Jaques Schmidt; Abbas Seyedolali; Georgios Siavalas; Isabel Suarez-Ruiz; Carlos Vargas Vargas; Brett J. Valentine; Nicola Wagner; Bree Wrolson; Julian Esteban Jaramillo Zapata. 2019. "Testing reproducibility of vitrinite and solid bitumen reflectance measurements in North American unconventional source-rock reservoir petroleum systems." Marine and Petroleum Geology 114, no. : 104172.

Journal article
Published: 14 October 2019 in Journal of African Earth Sciences
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Coal layers up to 1 m thick, exposed mainly on river banks in the vicinity of Agbor, Okhuokhuo and Ubiaja, Southern Nigeria, were examined by means of organic petrology, mineralogy and geochemistry, in order to gain coal quality data and understand the palaeoenvironmental conditions during peat accumulation in the broad area of the Ogwashi-Asaba Formation. The obtained results show that coal is of low-rank C; it overlies mainly claystone derived from flooding of branches of the palaeo-Niger River. The precursor peat was accumulating in mires under mesotrophic to ombrotrophic, anoxic conditions. The peat-forming vegetation represented mainly herbaceous plants with minor tree contribution. Though the number of studied samples is low, the distribution of the lignite layers extends further towards N·NW of the known lignite-bearing area. Taking into consideration the low ash yields of some samples, there are encouraging indications for notable lignite deposits of high quality. The mineralogical composition and the activity concentrations of 238U, 226Ra, 232Th and 4 K exclude any severe environmental effect from coal exploitation. Due to all these promising evidences, a detailed exploration in these and between these outcrops is recommended in order to estimate the lignite potential hosted in this area.

ACS Style

Jude Etunimonuwa Ogala; Stavros Kalaitzidis; Apollon-Marios Rizos; Kimon Christanis; Omoleomo Olutoyin Omo-Irabor; Edwin Ozor Adaikpoh; Omabehere Innocent Ejeh; Helen Papaefthymiou. Petrographic and mineralogical study of extended outcrops of lignite layers in Agbor area, southern Nigeria. Journal of African Earth Sciences 2019, 164, 103659 .

AMA Style

Jude Etunimonuwa Ogala, Stavros Kalaitzidis, Apollon-Marios Rizos, Kimon Christanis, Omoleomo Olutoyin Omo-Irabor, Edwin Ozor Adaikpoh, Omabehere Innocent Ejeh, Helen Papaefthymiou. Petrographic and mineralogical study of extended outcrops of lignite layers in Agbor area, southern Nigeria. Journal of African Earth Sciences. 2019; 164 ():103659.

Chicago/Turabian Style

Jude Etunimonuwa Ogala; Stavros Kalaitzidis; Apollon-Marios Rizos; Kimon Christanis; Omoleomo Olutoyin Omo-Irabor; Edwin Ozor Adaikpoh; Omabehere Innocent Ejeh; Helen Papaefthymiou. 2019. "Petrographic and mineralogical study of extended outcrops of lignite layers in Agbor area, southern Nigeria." Journal of African Earth Sciences 164, no. : 103659.

Journal article
Published: 30 March 2019 in Minerals
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This paper investigates an alternative use of sterile aggregate materials which may arise from various construction applications in conjunction with other low-cost mineral raw materials to remediate the acid mine drainage phenomenon. This study is based on the combination of unprocessed mineral raw materials, as well as on the basic concept of the cyclic economy where the conversion of a waste into a raw material for another application can be achieved. In this study, in order to examine the remediation, in lab scale, of the drainage waste water of Agios Philippos mine, an experimental electrically continuous flow-driven forced device was constructed, enriching the research gap relative to this type of remediation approach. Through this experimental device, the use of certain mixes of mineral raw materials (serpentinite, andesite, magnesite, peat, and biochar) was studied. Our results focus on the impact of the studied mineral raw materials and especially on their synergy on the water purification potential under continuous water flow operation. Using the new 7-day experimental electrically continuous flow-driven forced device with certain mixes of mineral raw materials, the increase of pH values from 3.00 to 6.82 was achieved. Moreover, with use of the experimental device, the removal of toxic load was achieved, and more specifically the concentration of Fe was decreased from 6149 to 1300 ppb, Cu from 8847 to 35 ppb, and Zn from 285,458 to 50,000 ppb.

ACS Style

Petros Petrounias; Aikaterini Rogkala; Panagiota P. Giannakopoulou; Basilios Tsikouras; Paraskevi Lampropoulou; Stavros Kalaitzidis; Konstantin Hatzipanagiotou; Nicolaos Lambrakis; Marina A. Christopoulou. An Experimental Study for the Remediation of Industrial Waste Water Using a Combination of Low Cost Mineral Raw Materials. Minerals 2019, 9, 207 .

AMA Style

Petros Petrounias, Aikaterini Rogkala, Panagiota P. Giannakopoulou, Basilios Tsikouras, Paraskevi Lampropoulou, Stavros Kalaitzidis, Konstantin Hatzipanagiotou, Nicolaos Lambrakis, Marina A. Christopoulou. An Experimental Study for the Remediation of Industrial Waste Water Using a Combination of Low Cost Mineral Raw Materials. Minerals. 2019; 9 (4):207.

Chicago/Turabian Style

Petros Petrounias; Aikaterini Rogkala; Panagiota P. Giannakopoulou; Basilios Tsikouras; Paraskevi Lampropoulou; Stavros Kalaitzidis; Konstantin Hatzipanagiotou; Nicolaos Lambrakis; Marina A. Christopoulou. 2019. "An Experimental Study for the Remediation of Industrial Waste Water Using a Combination of Low Cost Mineral Raw Materials." Minerals 9, no. 4: 207.

Preprint
Published: 08 March 2019
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This paper investigates an alternative use of sterile aggregate materials which may arise from various construction applications in conjunction with other low-cost mineral raw materials to remediate the acid mine drainage phenomenon. This study is based on the combination of unprocessed mineral raw materials as well as on the basic concept of the cyclic economy where the conversion of a waste into a raw material for another application can be achieved. In this way, the value of mineral raw materials can be prolonged for as long as possible, waste generation and exploitation of natural resources are minimized and resources are kept as far as possible within the existing economy. In this study, an electrically continuous flow driven forced device proposed and demonstrated for the remediation of waste water in lab-scale by using certain mixes of mineral raw materials (serpentinite, andesite, magnesite, peat and biochar). Our results focus on the impact of the studied mineral raw materials and especially on their synergy on the water purification potential under continuous water flow operation. Using the proposed 7-day experimental electrically continuous flow driven forced device with the certain mixes of mineral raw materials, the increase of pH values from 3.00 to 6.82 as well as significant removal of Fe, Cu and Zn was achieved.

ACS Style

Petros Petrounias; Aikaterini Rogkala; Panagiota P. Giannakopoulou; Basilios Tsikouras; Paraskevi Lampropoulou; Stavros Kalaitzidis; Konstantin Hatzipanagiotou; Nicolaos Lambrakis; Marina A. Christopoulou. An Experimental Study for the Remediation of Industrial Waste Water Using Combination of Low Cost Mineral Raw Materials. 2019, 1 .

AMA Style

Petros Petrounias, Aikaterini Rogkala, Panagiota P. Giannakopoulou, Basilios Tsikouras, Paraskevi Lampropoulou, Stavros Kalaitzidis, Konstantin Hatzipanagiotou, Nicolaos Lambrakis, Marina A. Christopoulou. An Experimental Study for the Remediation of Industrial Waste Water Using Combination of Low Cost Mineral Raw Materials. . 2019; ():1.

Chicago/Turabian Style

Petros Petrounias; Aikaterini Rogkala; Panagiota P. Giannakopoulou; Basilios Tsikouras; Paraskevi Lampropoulou; Stavros Kalaitzidis; Konstantin Hatzipanagiotou; Nicolaos Lambrakis; Marina A. Christopoulou. 2019. "An Experimental Study for the Remediation of Industrial Waste Water Using Combination of Low Cost Mineral Raw Materials." , no. : 1.

Journal article
Published: 08 December 2018 in Minerals
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This paper investigates the interrelationships between the engineering properties of igneous aggregate rocks from Greece with the aid of the R-mode factor analysis. The collected samples represent mafic and ultramafic rocks from the ophiolite complexes of Gerania, Guevgueli, Veria-Naousa, and Edessa as well as intermediate-acidic rocks from the surrounding areas of the complexes. Factor analysis verifies the important interdependences among the engineering parameters like physical, mechanical, geometrical, and physicochemical properties by giving statistical significance. Variations of the petrographic characteristics of the investigated rocks influence their engineering properties as well as the interdependence among them. Factor 1, which is the most representative one (~36% of the total variance), shows interdependences between certain physical, mechanical, physicochemical properties such as total porosity (nt) with moisture content (w), nt with the Los Abrasion value (LA), and the uniaxial compressive strength (UCS) with point load index Is(50). Additionally, the second factor (~27% of the total data variability) correlates physical properties such as w, nt, physicochemical properties such as the methylene blue test (MBF), mechanical properties such as UCS, Is(50), and loss on ignition (LOI), which highlights the effect of mineralogy on these properties. Lastly, Factor 3 (~14% of the total data variability) expresses the interdependence of the flakiness index (IF), which is an elongation index (IE) relative to their alteration (LOI).

ACS Style

Panagiota P. Giannakopoulou; Petros Petrounias; Basilios Tsikouras; Stavros Kalaitzidis; Aikaterini Rogkala; Konstantin Hatzipanagiotou; Stylianos F. Tombros. Using Factor Analysis to Determine the Interrelationships between the Engineering Properties of Aggregates from Igneous Rocks in Greece. Minerals 2018, 8, 580 .

AMA Style

Panagiota P. Giannakopoulou, Petros Petrounias, Basilios Tsikouras, Stavros Kalaitzidis, Aikaterini Rogkala, Konstantin Hatzipanagiotou, Stylianos F. Tombros. Using Factor Analysis to Determine the Interrelationships between the Engineering Properties of Aggregates from Igneous Rocks in Greece. Minerals. 2018; 8 (12):580.

Chicago/Turabian Style

Panagiota P. Giannakopoulou; Petros Petrounias; Basilios Tsikouras; Stavros Kalaitzidis; Aikaterini Rogkala; Konstantin Hatzipanagiotou; Stylianos F. Tombros. 2018. "Using Factor Analysis to Determine the Interrelationships between the Engineering Properties of Aggregates from Igneous Rocks in Greece." Minerals 8, no. 12: 580.

Journal article
Published: 01 April 2018 in Quaternary Science Reviews
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The iconic climate archive of Tenaghi Philippon (TP), NE Greece, allows the study of short-term palaeoclimatic and environmental change throughout the past 1.3 Ma. To provide high-quality age control for detailed palaeoclimate reconstructions based on the TP archive, (crypto)tephra studies of a peat core ‘TP-2005’ have been carried out for the 0–130 ka interval. The results show that the TP basin is ideally positioned to receive tephra fall from both the Italian and Aegean Arc volcanic provinces. Two visible tephra layers, the Santorini Cape Riva/Y-2 (c. 22 ka) and the Campanian Ignimbrite (CI)/Y-5 (c. 39.8 ka) tephras, and six primary cryptotephra layers, namely the early Holocene E1 tephra from the Aeolian Islands (c. 8.3 ka), the Campanian Y-3 (c. 29 ka) and X-6 tephras (c. 109.5 ka), as well as counterpart tephras TM-18-1d (c. 40.4 ka), TM-23-11 (c. 92.4 ka) and TM-33-1a (c. 116.7 ka) from the Lago Grande di Monticchio sequence (southern Italy), were identified along with repeatedly redeposited Y-2 and CI tephra material. Bayesian modelling of the ages of seven of the primary tephra layers, 60 radiocarbon measurements and 20 palynological control points have been applied to markedly improve the chronology of the TP archive. This revised chronology constrains the age of tephra TM-18-1d to 40.90–41.66 cal ka BP (95.4% range). Several tephra layers identified in the TP record form important isochrons for correlating this archive with other terrestrial (e.g., Lago Grande di Monticchio, Sulmona Basin and Lake Ohrid) and marine (e.g., Adriatic Sea core PRAD 1-2 and Aegean Sea core LC21) palaeoclimate records in the Mediterranean region.

ACS Style

Sabine Wulf; Mark J. Hardiman; Richard Staff; Andreas Koutsodendris; Oona Appelt; Simon P.E. Blockley; J. John Lowe; Christina J. Manning; Luisa Ottolini; Axel K. Schmitt; Victoria Smith; Emma Tomlinson; Polina Vakhrameeva; Maria Knipping; Ulrich Kotthoff; Alice M. Milner; Ulrich C. Müller; Kimon Christanis; Stavros Kalaitzidis; Polychronis Tzedakis; Gerhard Schmiedl; Jörg Pross. The marine isotope stage 1–5 cryptotephra record of Tenaghi Philippon, Greece: Towards a detailed tephrostratigraphic framework for the Eastern Mediterranean region. Quaternary Science Reviews 2018, 186, 236 -262.

AMA Style

Sabine Wulf, Mark J. Hardiman, Richard Staff, Andreas Koutsodendris, Oona Appelt, Simon P.E. Blockley, J. John Lowe, Christina J. Manning, Luisa Ottolini, Axel K. Schmitt, Victoria Smith, Emma Tomlinson, Polina Vakhrameeva, Maria Knipping, Ulrich Kotthoff, Alice M. Milner, Ulrich C. Müller, Kimon Christanis, Stavros Kalaitzidis, Polychronis Tzedakis, Gerhard Schmiedl, Jörg Pross. The marine isotope stage 1–5 cryptotephra record of Tenaghi Philippon, Greece: Towards a detailed tephrostratigraphic framework for the Eastern Mediterranean region. Quaternary Science Reviews. 2018; 186 ():236-262.

Chicago/Turabian Style

Sabine Wulf; Mark J. Hardiman; Richard Staff; Andreas Koutsodendris; Oona Appelt; Simon P.E. Blockley; J. John Lowe; Christina J. Manning; Luisa Ottolini; Axel K. Schmitt; Victoria Smith; Emma Tomlinson; Polina Vakhrameeva; Maria Knipping; Ulrich Kotthoff; Alice M. Milner; Ulrich C. Müller; Kimon Christanis; Stavros Kalaitzidis; Polychronis Tzedakis; Gerhard Schmiedl; Jörg Pross. 2018. "The marine isotope stage 1–5 cryptotephra record of Tenaghi Philippon, Greece: Towards a detailed tephrostratigraphic framework for the Eastern Mediterranean region." Quaternary Science Reviews 186, no. : 236-262.

Original paper
Published: 02 October 2017 in Arabian Journal of Geosciences
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The low-grade base metal sulphide Cu–Zn–Pb and Fe mineralization of Qandil Series develop in shear zones that occur in formations of the north-western part of the Zagros Orogen. This sulphide mineralization occurs either as quartz vein type or disseminated type associated with metamorphic rocks (marbles and phyllites). This study aims to characterize these sulphide-rich ores by means of their mineralogical and geochemical features, including also the features of the corresponded host formations and those of marbles (calcitic and dolomitic) and phyllites. Petrographical data indicate the presence of Cu, Zn, Pb and Fe sulphides in hydrothermal quartz (±calcite) veins of different generations. Geochemical data of surface samples indicate enrichment of Cu and Fe in shear zones with low concentrations in Zn and Pb. The REE data indicate that the genesis of these sulphide ores took place in a hydrothermal system and was generally attributed to high temperature (> 250 °C).The mineralization seems to be fault-controlled, which is favoured by the significant tectonic deformation of the area.

ACS Style

Tola A. Mirza; Stavros P. Kalaitzidis; Sarkhel H. Mohammed; Saman Gh. Rashid; Xenia Petrou. Geochemistry and genesis of sulphide ore deposits in Sharosh Village, Qandil Series, Kurdistan Region, NE Iraq. Arabian Journal of Geosciences 2017, 10, 1 .

AMA Style

Tola A. Mirza, Stavros P. Kalaitzidis, Sarkhel H. Mohammed, Saman Gh. Rashid, Xenia Petrou. Geochemistry and genesis of sulphide ore deposits in Sharosh Village, Qandil Series, Kurdistan Region, NE Iraq. Arabian Journal of Geosciences. 2017; 10 (19):1.

Chicago/Turabian Style

Tola A. Mirza; Stavros P. Kalaitzidis; Sarkhel H. Mohammed; Saman Gh. Rashid; Xenia Petrou. 2017. "Geochemistry and genesis of sulphide ore deposits in Sharosh Village, Qandil Series, Kurdistan Region, NE Iraq." Arabian Journal of Geosciences 10, no. 19: 1.

Journal article
Published: 01 October 2017 in International Journal of Coal Geology
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I. Suárez-Ruiz; Bruno Valentim; A.G. Borrego; A. Bouzinos; Deolinda Flores; Stavros Kalaitzidis; M.L. Malinconico; M. Marques; M. Misz-Kennan; G. Predeanu; J.R. Montes; Sandra Rodrigues; G. Siavalas; Nicola Wagner. Development of a petrographic classification of fly-ash components from coal combustion and co-combustion. (An ICCP Classification System, Fly-Ash Working Group – Commission III.). International Journal of Coal Geology 2017, 183, 188 -203.

AMA Style

I. Suárez-Ruiz, Bruno Valentim, A.G. Borrego, A. Bouzinos, Deolinda Flores, Stavros Kalaitzidis, M.L. Malinconico, M. Marques, M. Misz-Kennan, G. Predeanu, J.R. Montes, Sandra Rodrigues, G. Siavalas, Nicola Wagner. Development of a petrographic classification of fly-ash components from coal combustion and co-combustion. (An ICCP Classification System, Fly-Ash Working Group – Commission III.). International Journal of Coal Geology. 2017; 183 ():188-203.

Chicago/Turabian Style

I. Suárez-Ruiz; Bruno Valentim; A.G. Borrego; A. Bouzinos; Deolinda Flores; Stavros Kalaitzidis; M.L. Malinconico; M. Marques; M. Misz-Kennan; G. Predeanu; J.R. Montes; Sandra Rodrigues; G. Siavalas; Nicola Wagner. 2017. "Development of a petrographic classification of fly-ash components from coal combustion and co-combustion. (An ICCP Classification System, Fly-Ash Working Group – Commission III.)." International Journal of Coal Geology 183, no. : 188-203.

Journal article
Published: 01 June 2017 in International Journal of Coal Geology
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J. Kus; C.V. Araujo; A.G. Borrego; D. Flores; P.C. Hackley; M. Hámor-Vidó; S. Kalaitzidis; C.J. Kommeren; B. Kwiecińska; M. Mastalerz; J.G. Mendonça Filho; T.R. Menezes; M. Misz-Kennan; G.J. Nowak; H.I. Petersen; D. Rallakis; I. Suárez-Ruiz; I. Sýkorová; D. Životić. Identification of alginite and bituminite in rocks other than coal. 2006, 2009, and 2011 round robin exercises of the ICCP Identification of Dispersed Organic Matter Working Group. International Journal of Coal Geology 2017, 178, 26 -38.

AMA Style

J. Kus, C.V. Araujo, A.G. Borrego, D. Flores, P.C. Hackley, M. Hámor-Vidó, S. Kalaitzidis, C.J. Kommeren, B. Kwiecińska, M. Mastalerz, J.G. Mendonça Filho, T.R. Menezes, M. Misz-Kennan, G.J. Nowak, H.I. Petersen, D. Rallakis, I. Suárez-Ruiz, I. Sýkorová, D. Životić. Identification of alginite and bituminite in rocks other than coal. 2006, 2009, and 2011 round robin exercises of the ICCP Identification of Dispersed Organic Matter Working Group. International Journal of Coal Geology. 2017; 178 ():26-38.

Chicago/Turabian Style

J. Kus; C.V. Araujo; A.G. Borrego; D. Flores; P.C. Hackley; M. Hámor-Vidó; S. Kalaitzidis; C.J. Kommeren; B. Kwiecińska; M. Mastalerz; J.G. Mendonça Filho; T.R. Menezes; M. Misz-Kennan; G.J. Nowak; H.I. Petersen; D. Rallakis; I. Suárez-Ruiz; I. Sýkorová; D. Životić. 2017. "Identification of alginite and bituminite in rocks other than coal. 2006, 2009, and 2011 round robin exercises of the ICCP Identification of Dispersed Organic Matter Working Group." International Journal of Coal Geology 178, no. : 26-38.

Journal article
Published: 01 May 2017 in Quaternary International
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Pavlos Avramidis; S. Kalaitzidis; George Iliopoulos; P. Papadopoulou; K. Nikolaou; S. Papazisimou; K. Christanis; G.J. van Wijngaarden. The so called ‘Herodotus Springs’ at ‘Keri Lake’ in Zakynthos Island western Greece: A palaeoenvironmental and palaeoecological approach. Quaternary International 2017, 439, 37 -51.

AMA Style

Pavlos Avramidis, S. Kalaitzidis, George Iliopoulos, P. Papadopoulou, K. Nikolaou, S. Papazisimou, K. Christanis, G.J. van Wijngaarden. The so called ‘Herodotus Springs’ at ‘Keri Lake’ in Zakynthos Island western Greece: A palaeoenvironmental and palaeoecological approach. Quaternary International. 2017; 439 ():37-51.

Chicago/Turabian Style

Pavlos Avramidis; S. Kalaitzidis; George Iliopoulos; P. Papadopoulou; K. Nikolaou; S. Papazisimou; K. Christanis; G.J. van Wijngaarden. 2017. "The so called ‘Herodotus Springs’ at ‘Keri Lake’ in Zakynthos Island western Greece: A palaeoenvironmental and palaeoecological approach." Quaternary International 439, no. : 37-51.

Journal article
Published: 01 January 2017 in International Journal of Coal Geology
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The liptinite maceral group has been revised by ICCP in accordance with the ICCP System 1994. After the revision of the classifications of vitrinite (ICCP, 1998), inertinite, (ICCP, 2001) and huminite (Sykorova et al., 2005) this liptinite classification completes the revised ICCP maceral group classifications. These classifications are collectively referred to as the “ICCP System 1994”. In contrast to the previous ICCP Stopes Heerlen (ICCP, 1963, 1971, 1975, 1993) this new classification system is applicable to coal of all ranks and dispersed organic matter.The classification as presented here was accepted in the ICCP Plenary Session on September 11, 2015 at the ICCP Meeting in Potsdam. The decision to publish this classification in the recent form was accepted at the ICCP Plenary Session on September 23, 2016 in Houston

ACS Style

W. Pickel; J. Kus; Deolinda Flores; Stavros Kalaitzidis; Kimon Christanis; B.J. Cardott; M. Misz-Kennan; Sandra Rodrigues; A. Hentschel; M. Hamor-Vido; P. Crosdale; Nicola Wagner. Classification of liptinite – ICCP System 1994. International Journal of Coal Geology 2017, 169, 40 -61.

AMA Style

W. Pickel, J. Kus, Deolinda Flores, Stavros Kalaitzidis, Kimon Christanis, B.J. Cardott, M. Misz-Kennan, Sandra Rodrigues, A. Hentschel, M. Hamor-Vido, P. Crosdale, Nicola Wagner. Classification of liptinite – ICCP System 1994. International Journal of Coal Geology. 2017; 169 ():40-61.

Chicago/Turabian Style

W. Pickel; J. Kus; Deolinda Flores; Stavros Kalaitzidis; Kimon Christanis; B.J. Cardott; M. Misz-Kennan; Sandra Rodrigues; A. Hentschel; M. Hamor-Vido; P. Crosdale; Nicola Wagner. 2017. "Classification of liptinite – ICCP System 1994." International Journal of Coal Geology 169, no. : 40-61.

Journal article
Published: 01 August 2015 in Newsletters on Stratigraphy
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Jörg Pross; Andreas Koutsodendris; Kimon Christanis; Tobias Fischer; William J. Fletcher; Mark Hardiman; Stavros Kalaitzidis; Maria Knipping; Ulrich Kotthoff; Alice Milner; Ulrich C. Müller; Gerhard Schmiedl; George Siavalas; Polychronis Tzedakis; Sabine Wulf. The 1.35-Ma-long terrestrial climate archive of Tenaghi Philippon, northeastern Greece: Evolution, exploration, and perspectives for future research. Newsletters on Stratigraphy 2015, 48, 253 -276.

AMA Style

Jörg Pross, Andreas Koutsodendris, Kimon Christanis, Tobias Fischer, William J. Fletcher, Mark Hardiman, Stavros Kalaitzidis, Maria Knipping, Ulrich Kotthoff, Alice Milner, Ulrich C. Müller, Gerhard Schmiedl, George Siavalas, Polychronis Tzedakis, Sabine Wulf. The 1.35-Ma-long terrestrial climate archive of Tenaghi Philippon, northeastern Greece: Evolution, exploration, and perspectives for future research. Newsletters on Stratigraphy. 2015; 48 (3):253-276.

Chicago/Turabian Style

Jörg Pross; Andreas Koutsodendris; Kimon Christanis; Tobias Fischer; William J. Fletcher; Mark Hardiman; Stavros Kalaitzidis; Maria Knipping; Ulrich Kotthoff; Alice Milner; Ulrich C. Müller; Gerhard Schmiedl; George Siavalas; Polychronis Tzedakis; Sabine Wulf. 2015. "The 1.35-Ma-long terrestrial climate archive of Tenaghi Philippon, northeastern Greece: Evolution, exploration, and perspectives for future research." Newsletters on Stratigraphy 48, no. 3: 253-276.

Original articles
Published: 03 December 2014 in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
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Maceral analyses along with proximate and elemental analyses were undertaken in order to determine the features of the Amynteo coal deposit and its depositional environment. The Amynteo coal has an eu-ulminite B reflectance of Rr = 0.21%, and in terms of lithotype belongs to matrix lignite. Huminite is the most abundant maceral group, consisting mostly of detrohuminite. Inertinite has relatively low percentages whereas liptinite concentrations are rather high. A ternary plot was applied as an indication of the depositional paleoenvironment. The results from the majority of the samples indicate origin in a topogenous setting. The peat accumulation was governed by a high groundwater level (wet telmatic to limno-telmatic facies). The depositional environment can be characterized as a reed-marsh environment, with occasional establishment of forest swamps.

ACS Style

A. Iordanidis; A. Georgakopoulos; S. Kalaitzidis. Petrographic Composition and Paleoenvironment of the Amynteo Lignite Deposit, Northern Greece. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 2014, 36, 2715 -2724.

AMA Style

A. Iordanidis, A. Georgakopoulos, S. Kalaitzidis. Petrographic Composition and Paleoenvironment of the Amynteo Lignite Deposit, Northern Greece. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects. 2014; 36 (24):2715-2724.

Chicago/Turabian Style

A. Iordanidis; A. Georgakopoulos; S. Kalaitzidis. 2014. "Petrographic Composition and Paleoenvironment of the Amynteo Lignite Deposit, Northern Greece." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 36, no. 24: 2715-2724.

Journal article
Published: 13 February 2013 in Journal of Quaternary Science
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Alice M. Milner; Ulrich C. Müller; Katherine Roucoux; Richard E. L. Collier; Jörg Pross; Stavros Kalaitzidis; Kimon Christanis; Polychronis C. Tzedakis. Environmental variability during the Last Interglacial: a new high-resolution pollen record from Tenaghi Philippon, Greece. Journal of Quaternary Science 2013, 28, 113 -117.

AMA Style

Alice M. Milner, Ulrich C. Müller, Katherine Roucoux, Richard E. L. Collier, Jörg Pross, Stavros Kalaitzidis, Kimon Christanis, Polychronis C. Tzedakis. Environmental variability during the Last Interglacial: a new high-resolution pollen record from Tenaghi Philippon, Greece. Journal of Quaternary Science. 2013; 28 (2):113-117.

Chicago/Turabian Style

Alice M. Milner; Ulrich C. Müller; Katherine Roucoux; Richard E. L. Collier; Jörg Pross; Stavros Kalaitzidis; Kimon Christanis; Polychronis C. Tzedakis. 2013. "Environmental variability during the Last Interglacial: a new high-resolution pollen record from Tenaghi Philippon, Greece." Journal of Quaternary Science 28, no. 2: 113-117.

Journal article
Published: 01 October 2012 in Geology
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The deposition of sapropels in the eastern Mediterranean Sea is thought to occur during intervals of intensified African monsoon and increased precipitation in the Mediterranean borderlands. Speleothem and pollen records, however, reveal conflicting evidence for a Mediterranean-wide precipitation increase, suggesting that seasonal changes in the hydrological regime may be important. Using a multiproxy record, we present the first independent evidence for seasonality of precipitation during the early Last Interglacial (ca. 130–119 ka) from the Tenaghi Philippon peatland in northeast Greece. During the early part of the interglacial, mineralogical, macrofossil, and pollen records from the same core show a shift from mire to lacustrine conditions simultaneous with an expansion of sclerophyllous vegetation and the presence of acicular aragonite, indicating the onset of highly evaporative summer conditions. This indicates enhanced seasonality of precipitation and reconciles the apparent incongruity between Mediterranean pollen and speleothem records. It also provides evidence for significantly increased winter precipitation coeval with the deposition of sapropel S5, one of the most prominent sapropels of the Pleistocene. We suggest that in addition to the summer African monsoon component, increased winter precipitation from the northern Mediterranean borderlands may have contributed to maintaining reduced surface-water salinities in the Mediterranean Sea over the entire year.

ACS Style

Alice Milner; Richard Collier; Katherine Roucoux; Ulrich C. Mueller; Joerg Pross; Stavros Kalaitzidis; Kimon Christanis; Polychronis Tzedakis. Enhanced seasonality of precipitation in the Mediterranean during the early part of the Last Interglacial. Geology 2012, 40, 919 -922.

AMA Style

Alice Milner, Richard Collier, Katherine Roucoux, Ulrich C. Mueller, Joerg Pross, Stavros Kalaitzidis, Kimon Christanis, Polychronis Tzedakis. Enhanced seasonality of precipitation in the Mediterranean during the early part of the Last Interglacial. Geology. 2012; 40 (10):919-922.

Chicago/Turabian Style

Alice Milner; Richard Collier; Katherine Roucoux; Ulrich C. Mueller; Joerg Pross; Stavros Kalaitzidis; Kimon Christanis; Polychronis Tzedakis. 2012. "Enhanced seasonality of precipitation in the Mediterranean during the early part of the Last Interglacial." Geology 40, no. 10: 919-922.

Journal article
Published: 08 February 2011 in Environmental Toxicology and Chemistry
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Contaminant levels in urban harbor sediments vary with contaminant emission levels, sedimentation rates, and sediment resuspension processes such as propeller wash. Levels of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) are decreasing in many urban harbors, as heavily contaminated sediments that accumulated during past decades are being buried by less-contaminated sediments. However, PAHs and PCBs remain a concern in areas where burial is slow or resuspension processes re-expose heavily contaminated older layers. Chronostratigraphic sediment core studies typically characterize contaminant level histories by using total sediment concentrations, C(sed) , and do not determine the freely dissolved porewater concentrations, C(pw) , which provide a better measure of bioavailability. Here both C(sed) and C(pw) profiles were established for PAHs and PCBs in dated sediment cores from diverse areas of Oslo Harbor, Norway. Sediment-porewater partitioning profiles were established alongside profiles of various sorbing carbonaceous phases, including total organic carbon (TOC), black carbon, and diverse carbonaceous geosorbents identified by petrographic analysis. Stratigraphic trends in carbonaceous phases and C(sed) could be associated with different industrial epochs: hydropower (post-1960, approximately), manufactured gas (∼1925-1960), coal (∼1910-1925), and early industry (∼1860-1910). Partitioning was highly variable and correlated best with the TOC. Hydropower-epoch sediments exhibit decreasing C(sed) with time and a relatively strong sorption capacity compared with the manufactured-gas epoch. Sediments from the manufactured-gas epoch exhibit substantial PAH and metal contamination, large amounts of coke and char, and a low sorption capacity. Reexposure of sediments of this epoch increases risks to local benthic species. Implications on natural recovery as a sediment management strategy are discussed.

ACS Style

Hans Peter H. Arp; Frederic Villers; Aivo Lepland; Stavros Kalaitzidis; Kimon Christanis; Amy M.P. Oen; Gijs D. Breedveld; Gerard Cornelissen. Influence of historical industrial epochs on pore water and partitioning profiles of polycyclic aromatic hydrocarbons and polychlorinated biphenyls in Oslo Harbor, Norway, sediment cores. Environmental Toxicology and Chemistry 2011, 30, 843 -851.

AMA Style

Hans Peter H. Arp, Frederic Villers, Aivo Lepland, Stavros Kalaitzidis, Kimon Christanis, Amy M.P. Oen, Gijs D. Breedveld, Gerard Cornelissen. Influence of historical industrial epochs on pore water and partitioning profiles of polycyclic aromatic hydrocarbons and polychlorinated biphenyls in Oslo Harbor, Norway, sediment cores. Environmental Toxicology and Chemistry. 2011; 30 (4):843-851.

Chicago/Turabian Style

Hans Peter H. Arp; Frederic Villers; Aivo Lepland; Stavros Kalaitzidis; Kimon Christanis; Amy M.P. Oen; Gijs D. Breedveld; Gerard Cornelissen. 2011. "Influence of historical industrial epochs on pore water and partitioning profiles of polycyclic aromatic hydrocarbons and polychlorinated biphenyls in Oslo Harbor, Norway, sediment cores." Environmental Toxicology and Chemistry 30, no. 4: 843-851.