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Bulgarian National Geological
Data Sets
Valeri Trendafilov, Nikolay Markov
Ministry of Environment and Waters
National Geofund and Geology
Paper Topics

Bulgarian National Geofund
 Bulgarian Geological Data Sets
National Geofund

A huge amount of data has been collected in a field
of Geological Sciences in Bulgaria in the last 50
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 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of disclosure of unpublished information to another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

The oldest geological report dated from 1925

Two ways to find 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 and etc.
– Using graphical interface for the areas in which
geological works have been done(an example
follows).
National Geofund
Geological Data Sets

The metadata for 32 geological data sets and 14
images as examples were prepared for the
GEIXS project.

The metadata were sent via e-mail to Jan Jillema
on 2 times.

The short descriptions of data sets follow below.
Geological Data Sets
1.Geological Map of Bulgaria, Scale
1:500000.
Published map in 1989, 2 flat coloured sheets
covered all territory of Bulgaria, BulgarianEnglish 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
Geological Data Sets
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 Maps
Digital Map, example.
Geological Data Sets
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Unpublished map series, standard indexed map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.
Geological Data Sets

Geological Maps, 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 Data Sets
4. Geomorphologic Map of Bulgaria, 1:100000.
Unpublished map series, map sheets correspond to
geological map in scale 1:100000.
Geological Data Sets
5. Geochemical Map of Bulgaria, 1:100000.
Unpublished series, presents point-source
geochemical data. The point data have been
gridded to create colour classified digital maps.
6. Gravity Map of Bulgaria, 1:100000.
Unpublished map series, Bouguer anomaly
contours and location of observations
Digital Maps
Geological Data Sets
7. Magnetic Map of Bulgaria, 1:100000.
Unpublished map series, ground magnetic anomaly
contours and location of digitised data points.
Geological Data Sets
8. Map of Mineral Deposits of Bulgaria, 1:100000.
Unpublished map series, consists of point objects that
represent location of mineral deposits, occurrence and
indication.
9. Geoarchive - Data set in Bulgarian language about all
the reports available in National Geofund with the key
words for searching.
10. Oil and Gas Wells. Data set for all the oil and gas wells
drilled on the territory of Bulgaria, onshore and offshore.
11.Seismic Lines in Bulgaria. Data set consists of
information from seismic surveys, onshore and offshore.
Example of interpretation using information from seismic
survey, wells and well logs.
Geological Data Sets
12.Aeromagnetic and Gamma Ray Spectrometer Data.
Regional aero data: Location of digitised data points along flight
lines and calculated values of magnetic fields and U,Th, K.
Geological Data Sets
13. Exploration Drillholes and Mining Workings. Data
set consists of information from drillholes and mining
workings of mineral exploration programs.
14. National Balance of Reserves and Resources. The
data set consists of reserves and resources of all
metallic, industrial minerals, oil and gas, coal deposits
in Bulgaria.
15. Tectonic Map of Bulgaria, 1:500000.
Published map, 2 sheets, Bulgarian-English Edition, 1976.
Digital Map
16. Magnetic Map of Bulgaria, 1:500000.
Contour map of Za(nT), produced from grid 5x5km
Geological Data Sets
17. Metallogenic Map of Bulgaria, 1:1000000.
Published 1coloured map sheet, English edition, 1989
18. Map of Delimited Areas of Gold Deposits in
Bulgaria.
Computer map, produced from digitised series of maps
of scale ranging from 1:1000 to 1:25000.
19. Map of Uranium Mineralization in Bulgaria.
Computer Map with uranium deposits, occurrences and
radioactive anomalies, digitised from maps of scale
1:200000.
Geological Data Sets
20. Physical properties of the Rocks.
Data set containing information for rock samplescoordinates, type of rock, geologic end tectonic
position and major physical properties. Currently
updated.
21. 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
Geological Data Sets
22. Geological Study Areas in Bulgaria. Computer maps of the
areas in which geological works have been done.
23. 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.
24. 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.
Geological Data Sets
25. Map of the Geological Hazards in Bulgaria, 1:500000.
Published Map accompanying with explanatory text in booklet,
1 folded colour sheet, Bulgarian-English edition, 1994
26.Groundwater Monitoring Design for Bulgaria, 1:1000000
Computer map for Groundwater Monitoring Design on the base
of Geological Map 1:500000.
27. Map of Underground Waters, 1:500000.
Unpublished map, paper copy.
28. Map of Mineral Waters in Bulgaria, 1:500000.
Unpublished map, paper copy.
Geological Data Sets
29. Hydrogeological Map of Bulgaria, 1:200000.
Published Atlas containing 28 coloured map sheets and 16
hydrogeological sections.
30. Map of Resources of Underground Waters in
Bulgaria, 1:200000.
Published Atlas containing 28 coloured map sheets.
31. Map of River System in Bulgaria, 1:25000.
Digital map sheets produced from topographic maps.
32. Protected Caves in Bulgaria.
Data set contains information about 113 protected caves with
maps of caves and protected areas.
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