This paper presents the development of a WebGIS application aimed at providing safe and reliable data needed for reclamation of abandoned mines in national parks and other protected areas in Vojvodina in compliance with existing legal regulations. The geodatabase model for this application has been developed using UML and the CASE tool Microsoft Visio featuring an interface with ArcGIS. The WebGIS application was developed using GeoServer, an open source tool in the Java programming language, with integrated PostgreSQL DB and the possibility of generating and publishing WMS, WFS and KML services. The WebGIS application is publicly available, based on an appropriate central database, which for the first time encompasses all available data on abandoned mines in Vojvodina, and as such may serve as a model for similar databases on the territory of the Republic of Serbia.

The Rudnik orefield is one of the well-known skarn-replacement and high-temperature hydrothermal Pb-Zn-Cu-Ag-Bi-W polymetallic sulfide deposits, and is a part of the Sumadija Metallogenic District, Serbia. It comprises ore bodies grouped into several major ore zones. The pseudostratified and platelike ore bodies have relatively high content of valuable metals. The average content varies in wide ranges: Pb (0.94-5.66 wt%), Zn (0.49-4.49 wt%), Cu (0.08-2.18 wt%), Ag (50-297 ppm), Bi (~100-150 ppm), and Cd (~100-150 ppm). Generally, a complex mineral association has been determined. Iron sulfides, arsenopyrite, chalcopyrite, sphalerite, galena and sulfosalts are abundant minerals in the ore. Carrier minerals of Bi and Ag are Bi-sulfosalts, such as galenobismutite, cosalite, Ag-bearing aschamalmite, vikingite, schirmerite and gustavite. Copper, Ag and Pb-Sb sulfosalts have been found only locally. Complex Ni-minerals (sulfides, arsenides and sulfoarsenid?s) with Fe, Co and Ag were formed under to the influence of present serpentine rocks and their yield of Ni, Co and Cr in the hydrothermal ore-bearing solutions. Significant scheelite mineralizations have been found in the Nova Jama, Gusavi Potok and Azna ore zones. The presence of Bi-sulfosalts and argentopentlandite suggests formation temperatures higher than 350, and lower than 445?C, respectively. Therefore, the mineralization was formed in the temperature range 350 to 400?C. The continuity of pyrite, pyrrhotite and siderite colloform bands in relic aggregates shows frequent changes of fS2 and fO2 in hydrothermal solutions. Isotopic composition of sulfur also confirms that the source of the ore-bearing fluids was magmatic. In addition, the enrichment of Bi and Ag indicates a magmatic origin. The appearance of Biminerals represents a significant genetic indicator for detection of increased Ag concentrations within the ore mineralizations. Typical gangue minerals are quartz, silicates, carbonates, oxides and different oxy-hydroxides. Special attention is given to the paragenetic relationships and the genetic significance of mineral associations as indicators of ore-forming conditions.

Савремени услови пословања предузећа у минералном сектору и минералној економији захтевају прилагођавање актуелним еколошким захтевима минералне производње у складу са савременим трендовима менаџерског и економског рада. У склопу економског вредновања минералних сировина доминантна је примена економске оцене, као савременог методолошког поступка и сложеног система фактора и показатеља оцене, који обухватају и геоеколошке факторе и показатеље са еколошком димензијом. У менаџерско-економским активностима у минералном сектору интегрално се примењују менаџерски методи у пословним активностима уз коришћење одговарајућих економских података и информација, као и пратећих економских калкулација и прорачуна, међу којима су посебно значајни еколошки трошкови. У условима нарочито јачајућег еколошког тренда, као и обавезујуће примене принципа одрживог развоја, практично је посебно важно дефинисање износа еколошких трошкова и њихово укључивање у цену коштања минералне сировине, а све у склопу евалуације минералних резерви и њихове економске оцене. Економски, стратегијски, али и оперативно посматрано посебно је значајно сагледавање функционалне позиције еколошких трошкова, односно њиховог места и улоге, кроз троструку моделску функционалну позицију и начин третирања еколошких трошкова. Генерални циљ је сагледавање одговарајућих еколошких аспеката минералне производње, кроз експертски приступ адекватног укључивања еколошких трошкова у експертску економску оцену и трошковно позиционо обухватање у економском вредновању минералних резерви у савременој и одрживој минералној производњи.

At the current moment of functioning of the mineral economy and the modern market performance of mineral sector companies, financial planning and financial control represent very important modern financial management tools for business success and making appropriate financial decisions. The variability of the operating factors of mineral production, conditions and methods of sale of mineral raw materials, price variations of individual mineral products and individual mineral raw materials require timely, correct and strategically oriented definition of the company's financial policy from the management of mineral sector companies. It basically includes three important segments, namely: (a) the policy of obtaining financial resources; (b) the policy of placing financial assets; and (c) the company's liquidity policy. The aforementioned should be in the direct function of ensuring the reproduction of mineral production and, what is particularly important, ensuring the reproduction of the mineral-raw material base, i.e. the expansion of ore reserves, necessary for the continuity of mineral production and meeting the needs of numerous economic branches for mineral raw materials. The basic task of such a financial policy of companies in the mineral sector is the fulfillment in the practice of mineral production of appropriate financial principles: (a) financial stability; (b) liquidity; (c) profitability; (d) financial elasticity; (e) financial independence; and (f) financial strength. A particular specificity of the practice of mineral production is the connection with the strategically important economic evaluation of mineral reserves, which through the structure of the set of economic evaluation factors and sets of economic evaluation indicators provides all the necessary elements for the success of financial planning, monitoring and successful realization of mineral production. Of particular importance is the specific separation of two types of profitability of mineral raw materials, namely: (a) commercial; and (b) national profitability, which in the end have a significant impact on the financial policy and financial operations of companies in the mineral sector.