GIS for processing and analyzing geological data and managing underground resources

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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_at_moew.govrn.bg
• www.moew.govrn.bg

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Paper Topics

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

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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  unpublished information to another organizations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.

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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).

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National Geofund
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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(Geol
ogical Electronic Information eXchange
System) Espirit No 23802 Metadata published on
http//geixs.eurogeosurveys.org/
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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

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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
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Geological Maps

• Geological Map of Bulgaria, Scale -
  1500000,1100000,125000 in GIS format -
  different layers of information
• Geological boundaries
• Stratigraphy
• Lithology
• Tectonics
• Rivers
• Infrastructure - towns, roads, railway

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Geological Maps
1. Geological Map of Bulgaria, Scale 1500000.

• 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 1100000 and
  available data of the National Geofund.
• Digital model available (MapInfo).

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Digital Map
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Digital Map

• Fragment of 1500000 map in real scale

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Digital Maps
2. Geological Map of Bulgaria, Scale 1100000.
Published Map Series, 86 coloured flat sheets,
covered all the country, available in Bulgarian
or in English edition. All available in digital
form (MapInfo).
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Digital Map, example.
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Geological Maps
3. Geological Map of Bulgaria, Scale 125000.

• 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.

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Digital Maps
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Digital Maps, example.
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Geomorphologic Map

• 4. Geomorphologic Map of Bulgaria, 1100000.
  Unpublished map series, map sheets correspond to
  geological map in scale 1100000.

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Geochemical Maps
5. Geochemical Map of Bulgaria, Scale 1100000.
Unpublished series, presents point-source
geochemical data. The point data have been
gridded to create colour classified digital maps.
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Geophysical Maps6. Gravity Map of Bulgaria,
Scale 1100000
Unpublished map series, Bouguer anomaly contours
and location of observations.
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Geophysical Maps

• 7. Magnetic Map of Bulgaria, 1100000.
• Unpublished map series, ground magnetic anomaly
  contours and location of digitised data points.

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Digital Magnetic Maps
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Digital Map

• Magnetic Map of Bulgaria, 1500000.
• Contour map of Za(nT), produced from grid 5x5km

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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.

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Geological Exploration

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

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

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Geological Data Sets

• 12. Map of Mineral Deposits of Bulgaria,
  1100000. Unpublished map series, consists of
  point objects that represent location of mineral
  deposits, occurrence and indication. Total number
  of objects 7787.

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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/competitio
ns/permit.html
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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.
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Examples - Gold Exploration

• Computer map, produced from digitised series of
  maps of scale ranging from 11000 to 125000.

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Examples

• Uranium

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Examples

• Aero Gamma Ray Spectrometer Anomalies Uranium

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Examples

• Oil and Gas Exploration

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Example of interpretation using information from
seismic survey, wells and well logs.
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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 125000.
• Digital map sheets produced from
  topographic maps.
• Groundwater Monitoring Design for Bulgaria,
  11000000
• Computer map for Groundwater Monitoring
  Design on the base of Geological Map 1500000.

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Other Data Sets

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