MANAGEMENT OF MINERAL RESOURCES OF KARST FIELDS, CASE STUDY OF COUNTY OF DUBROVNIK-NERETVA Željko Dedić(1)Slobodan Miko(1) Ozren Hasan(1) • Croatian GeologicalSurvey;Sachsova 2, Zagreb 10000, Croatia Sustainabilityof the Karst Environment - Dinaric Karst and other Karst Regions 2009 www.hgi-cgs.hr
Geologyof Croatia • >50% carbonate rock • (limestone and dolomite mainly of the Mesozoic Adriatic Carbonate Platform) • 40 % thick unconsolidated Quarternary sedimentary deposits • <5% eruptive and metamorphic rocks
Cadastre of Occurrences and Deposits of Mineral Resources and GIS of mineral resources Objectives of research • Production of cartographic overview whole mineral potential of mineral resources of Republic of Croatia • Cadastre part of unique Geological information system • Regularities of appearences and distribution of mineral resources – detection of new deposits • Cadastre in the form of points (geometrical element) • Map of mineral resource potential, based on type of mineral resources, level of potential, geological framework
Mineral resources of Croatia • Mineral commodity ectraction sites: • crushed stone aggregate; 253 sites • dimension stone aggregate; 103 sites • sand and gravel; 82 sites • clay; 49 sites • bauxite ; 15 sites • gypsum; 9 sites • other non metal deposits • coal in the past • 626 TOTAL NUMBER OF EXPLOITATION SITES IN CROATIA (378 km²)
Mineral resources of Dubrovačko-neretvanska county • 73 deposits and occurrences of mineral resources • 14 type of mineral resources • exploitation in 10 quarries of crushed stone aggregates and • dimensional stone quarrying at 6 exploitation sites • exploatation of marine salt, peloids, sands from Neretva river delta
Mapping geological potential • The administrative restrictions for exploitation of mineral resources are based on master spatial plans of the County and as well as conditions of land use, water supply protection, soil and cultural well. • The results of theb integration a map of geological potential and spatial restrictions is a map of restricted geological potential of mineral resources. • The final map of a restricted geological potential display a certain raw materials, including administrative restrictions in context of mineral exploitation (central and local government agencies): • road infrastruture • protected area ( nature park) • distance from settlements ( ½ km – 200 m) • nature reserve • tourist resorts • valunable land • water resources protection • protected landscapes • archeology zones • marine protected area (1km to the land; 300m to the sea-ZOP) Mapofrestrictedgeologicalpotentialof mineral resources Restrictions of land use related to extraction of mineral resources
Mineral resources ofCountyof Dubrovnik-Neretva Map of basic geological potential crushed stone aggregate in County Dubrovnik-Neretva. County of Dubrovnik-Neretva participited with 2,3% in basic production of crushed stone aggregate in Republic of Croatia. Crushed stone exploitation in County of Dubrovnik is similar to exploitation in Republic of Croatia
Mineral resources ofCountyof Dubrovnik-Neretva The largest restricted geological potential of crushed stone aggregates is connected to areas of coast of Dubrovnik, Konavle, Korčula and Orebić Arearestrictedgeologicalpotentialofcrushed stone aggregatesperunitsoflocal –selfgoverment( in km2). Map of restricted geological potential crushed stone aggregate in County Dubrovnik-Neretva.
Mineral resources ofCountyof Dubrovnik-Neretva At County of Dubrovnik-Neretva area of geological potential for dimensional stone aggregate amount 562 km², but implementing MPA-a, 239 km² or 43% geological potential zone , cannot be used for investigestion and exploitation. According to authors of strategy of managment of mineral resources of Republic of Croatia (Krasić et al.,2008), restriction gave to mining activities implementation of MPA-a are results inherited weaknesses in the field of activity as well as unknown opurtunities designed and used of enviroment. Map of restricted geological potential dimensional stone aggregate in County Dubrovnik-Neretva, in MPA zone
Mineral resources ofCountyof Dubrovnik-Neretva The largest reduced geological potential of dimensional stone aggregates is connected for areas of coast of Dubrovnik, Konavle, Korčula and Orebić, almost 65% of geological potential of dimensional aggregate stone. Productionofdimensional stone aggregatesin 4 countyin Croatia. County Dubrovnik-Neretva with 16% in total value (2005).
Management of mineral resources – effectsofexploitation With strategy of managment of mineral resources of Republic of Croatia within MPA-a recommend admission of mining activities of mineral resources in function of recovery and useful design abundand mining objects. Consenquently proposal which changes will be requested, extraordinary status of same areas for exploatation dimensional stone aggregate within MPA-a, like in case of island Brač. We need initiative from local self-goverment, county department, county economic council, professional group owner of quarries, Croatia economic council county Dubrovnik, Ministry of economy, Labour and Entrepreneurship, Department of mining. • Certainly, thereforeemphasisshould put on rarelyamountdimensional stone quarries, like economicpossibilities, andtraditionconstructionwith stone like partofculturalidentity all region, andlittle influence on enviromentexploatationofdimensional stone aggregate. Howstrategyneeds to serve like expertbasic for establishedpolicyofmanagmentof mineral resources, localself-goverment is the one ofthe most significantsubjectinentiresystem. Themainproblemsconnectedwithexploatationof mineral resources are: • destructionofpubliclocalroadinfrastucture • loudness • dust • negative enviromental influence • non-recoverypits
Management of mineral resources Ministry of Economy, Labour and Entrepreneurship, still from 2001.suggets increassing fee for exploitation from 2,6 % at variac amount toward type of mineral resources, wherefore 50% goes to local self-goverment, and 50% goes to state budget of Republic of Croatia, so debate is possible just after proposal new Mining law. For abunded pits and sites is need to create a posibility for natural recovery, and priority list of abunded pits. The spacing of present investigestion area and exploitation fields of mineral resources is results of intesive construction in county. However,certain number of present fields are in area which are defined like unfavourbly for exploitation in spatial plans of county. Inclusive, all locations of mineral resources need to locate in new law order. In that effect the authors of strategy of management of mineral resources of Republic of Croatia suggest that under basis of geological study, study of effects on mining activities at enviroment, as well as spatial-plans criteria to provide the locations for investigestion and exploitation of mineral resources is needed to establish the zone of exploitation.
Management of mineral resources SARMa-SustainableAggregatesResource Management http://www.sarmaproject.eu/ Project summary Aggregates (crushed stone, sand and gravel) are crucial for infrastructure and construction. SEE countries are rich in aggregates, but supply is not coordinated within or across the area. Challenges are illegal and damaging quarries, unreclaimed sites, limited recycling and community opposition. Fulfilling demand requires efficient and sustainable supply chain (planning, extraction, transport, use and recycling), and socio-eco friendly quarrying, to preclude opposition to extraction, supply bottlenecks, and restricted growth. Main objectives of the project are to develop common approach to sustainable aggregate resource management (SARM) and sustainable supply mix (SSM) planning, at three scales, to ensure efficient and secure supply in SEE. Specific objectives include capacity building, information infrastructure creation, and planning for a Regional Centre on SARM and SSM. Local, site-level activities will focus on environmentally friendly extraction through best practices, reducing illegal quarrying, and recycling to reducing use of primary aggregates. Region/national activities will create a SARM framework for effective management, and define SSM, as well as recommend how to integrate SSM into planning and legislation. Transnational activities focus on harmonization of relevant policies and legislation across SEE, information transfer, and creation of an Aggregates Intelligence System. The project builds the foundation for a Regional Centre on sustainable aggregates management and supply. Main outputs will include capacity building materials: printed materials (manuals) on (1) local level aggregate operation improvements, (2) regional, national and transnational policy, legislation, management and supply mix, (3) C & D waste management, tools, methods (e.g. life cycle analysis); and regional, national and transnational events. Results will include use of best practices, adoption of SARM and SSM, harmonized policies, and ongoing collaboration among partners.
Fold in Eocene deposits • A proposed protected geological site • Kapelj spring, Moseć Thank you !