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 TopicsPaper Topics

Bulgarian National GeofundGeological Maps in GISExploration of Underground

Resources Examples

National GeofundNational 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 The National Geofund is in charge of disclosure of unpublished information to another organizations under established rules.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 GeofundNational 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 GeofundNational Geofund

National GeofundNational 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 GeofundNational GeofundOther 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 EuropeanRegional Seas - MARINERS• Black Sea Scene

Digital MapsDigital 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 MapsGeological 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 MapsGeological Maps

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).

1. Geological Map of Bulgaria, Scale 1:500000.

Digital MapDigital Map

Digital MapDigital Map Fragment of 1:500000 map in real scale

Digital MapsDigital Maps2. 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.Digital Map, example.

Geological MapsGeological Maps

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.

3. Geological Map of Bulgaria, Scale 1:25000.

Digital MapsDigital Maps

Digital Maps, example.Digital Maps, example.

Geomorphologic MapGeomorphologic Map

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 Unpublished map series, map sheets correspond to geological map in scale 1:100000.

Geochemical MapsGeochemical Maps5. 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 MapsGeophysical Maps6. 6. Gravity Map of Bulgaria, Scale 1:100000Gravity Map of Bulgaria, Scale 1:100000

Unpublished map series, Bouguer anomaly contours and location of observations.

Geophysical MapsGeophysical Maps7. Magnetic Map of Bulgaria, 1:100000.

Unpublished map series, ground magnetic anomaly contours and location of digitised data points.

Digital Magnetic MapsDigital Magnetic Maps

Digital MapDigital Map Magnetic Map of Bulgaria, 1:500000.

Contour map of Za(nT), produced from grid 5x5km

Geological MapsGeological Maps8.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 ExplorationGeological Exploration9. Exploration Drillholes and Mining Workings. Data

set consists of information from drillholes and mining workings of mineral exploration programs.

Digital MapsDigital Maps10. Seismic Lines in Bulgaria. Data set consists of information from seismic surveys, onshore and offshore.3930 lines - onshore1573 lines - offshore

Geological Data SetsGeological Data Sets11. 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 SetsGeological Data Sets12. 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 SetsGeological Data Sets13. 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 samplesContents 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.

Examples - Gold ExplorationExamples - Gold ExplorationComputer map, produced from digitised series of maps

of scale ranging from 1:1000 to 1:25000.

ExamplesExamples Uranium

ExamplesExamplesAero Gamma Ray Spectrometer Anomalies

Uranium

ExamplesExamples Oil and Gas Exploration

ExampleExample of interpretation using information from seismic survey, of interpretation using information from seismic survey,

wells and well logs.wells and well logs.

Other Data SetsOther 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 SetsOther Data Sets• Protected Caves in Bulgaria.

Data set contains information about 113 protected caves with maps of caves and protected areas.