Ministry of Environment and Water National Geofund and Geology GIS for processing and analyzing geological data and managing underground resources Valeri Trendafilov Ministry of Environment and Water National Geofund and Geology 22, Princess Marie Louse Blvd., 1000 Sofia, Bulgaria E-mail : trendv@moew.govrn.bg www.moew.govrn.bg

Paper Topics Bulgarian National Geofund Geological Maps in GIS Exploration of Underground Resources Examples

National Geofund A huge amount of data has been collected in a field of Geological Sciences in Bulgaria in the last 50-60 years. More than 7000 reports are available in National Geofund covering all aspects of geological activities in Bulgaria including geological mapping, geophysical and geochemical surveys, hydrogeology, exploration of mineral deposits etc. The oldest geological report dated from 1925. The National Geofund is responsible for collecting and storing all geological data in Bulgaria. Part of the data is published. The National Geofund is in charge of disclosure of unpublished information to another organizations under established rules.

National Geofund Two ways to find the reports of interest In “GeoArchive” Data Base for the reports -using keywords querying. Some keywords - Author name,Title, Year , Location, Map Sheet, Methods, Mineral Resource etc. Using graphical interface (GIS) for the areas in which geological works have been done(an example follows).

National Geofund

National Geofund Implementation of Information Technologies - 1992 Implementation of GIS - 1995 Programs financed from the State budget 32 data sets available or in progress of creating Metadata for the sets according GEIXS standards GEIXS(Geological Electronic Information eXchange System) Espirit No 23802 Metadata published on http://geixs.eurogeosurveys.org/

National Geofund Other International projects related to GIS: National System for Training of Public Administration in Ecological Management of Natural Resources. Contract N IB _JEP-13203-98, TEMPUS PHARE New Proposals for the 5th Framework Programme Energy, Environment and Sustainable Development: Marine Sediment Information Network for the European Regional Seas - MARINERS Black Sea Scene

Digital Maps - Register and Cadastre of Prospecting and/or Exploration Permits - Maps of Mineral Deposits - Exploration Works - Geochemical and Geophisical Anomalies Maps - Geological Maps - Topographic Maps

Geological Maps Geological Map of Bulgaria, Scale - 1:500000,1:100000,1:25000 in GIS format - different layers of information : Geological boundaries Stratigraphy Lithology Tectonics Rivers Infrastructure - towns, roads, railway

Geological Maps 1. Geological Map of Bulgaria, Scale 1:500000. Published map in 1989, 2 flat coloured sheets covered all territory of Bulgaria, Bulgarian-English edition. The map is compiled on the base of the Geological map of Bulgaria scale 1:100000 and available data of the National Geofund. Digital model available (MapInfo).

Digital Map

Digital Map Fragment of 1:500000 map in real scale

Digital Maps 2. Geological Map of Bulgaria, Scale 1:100000. Published Map Series, 86 coloured flat sheets, covered all the country, available in Bulgarian or in English edition. All available in digital form (MapInfo).

Digital Map, example.

Geological Maps 3. Geological Map of Bulgaria, Scale 1:25000. Unpublished map series, standard indexed map sheets, covered mineral potential areas. Reports are available in National Geofund. Some of map sheets are available in digital form(MapInfo). The results from new field geological mapping program are produced directly in digital form and printed. Only Bulgarian edition available.

Digital Maps

Digital Maps, example.

Geomorphologic Map 4. Geomorphologic Map of Bulgaria, 1:100000. Unpublished map series, map sheets correspond to geological map in scale 1:100000.

Geochemical Maps 5. Geochemical Map of Bulgaria, Scale 1:100000. Unpublished series, presents point-source geochemical data. The point data have been gridded to create colour classified digital maps.

Geophysical Maps 6. Gravity Map of Bulgaria, Scale 1:100000 Unpublished map series, Bouguer anomaly contours and location of observations.

Geophysical Maps 7. Magnetic Map of Bulgaria, 1:100000. Unpublished map series, ground magnetic anomaly contours and location of digitised data points.

Digital Magnetic Maps

Digital Map Magnetic Map of Bulgaria, 1:500000. Contour map of Za(nT), produced from grid 5x5km

Geological Maps 8.Aeromagnetic and Gamma Ray Spectrometer Data. Regional aero data: Location of digitised data points(2.5 millions) along flight lines and calculated values of magnetic fields and U,Th, K.

Geological Exploration 9. Exploration Drillholes and Mining Workings. Data set consists of information from drillholes and mining workings of mineral exploration programs.

Digital Maps 10. Seismic Lines in Bulgaria. Data set consists of information from seismic surveys, onshore and offshore. 3930 lines - onshore 1573 lines - offshore

Geological Data Sets 11. Oil and Gas Wells. Data set for all the oil and gas wells drilled on the territory of Bulgaria, onshore and offshore - 2200 wells.

Geological Data Sets 12. Map of Mineral Deposits of Bulgaria, 1:100000. Unpublished map series, consists of point objects that represent location of mineral deposits, occurrence and indication. Total number of objects 7787.

Geological Data Sets 13. Register and Cadastre of Prospecting and/or Exploration Permits. Register and Cadastre of permits for prospecting and/or exploration of underground resources issued by the state authorities according UNDERGROUND RESOURCES ACT. Current International Licensing Rounds are Announced on Web: www.moew.govrn.bg/ns/competitions/permit.html

Contents of gold grains in pan samples Examples - Pan sampling data. Data set contains information about position of pan samples and quality and quantity of minerals. Currently updated. Contents of gold grains in pan samples

Examples - Gold Exploration Computer map, produced from digitised series of maps of scale ranging from 1:1000 to 1:25000.

Examples Uranium

Examples Aero Gamma Ray Spectrometer Anomalies Uranium

Examples Oil and Gas Exploration

Example of interpretation using information from seismic survey, wells and well logs.

Other Data Sets Specialised Cadastre of Deposits and Register of Discoveries. Data set contains maps of mineral deposits and information about the discoveries of underground resources made as a result of geological research. Map of River System in Bulgaria, Scale 1:25000. Digital map sheets produced from topographic maps. Groundwater Monitoring Design for Bulgaria, 1:1000000 Computer map for Groundwater Monitoring Design on the base of Geological Map 1:500000.

Other Data Sets Protected Caves in Bulgaria. Data set contains information about 113 protected caves with maps of caves and protected areas.