Annual of the Geological Survey of
Estonia 2000
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This yearbook is the eleventh annual review of the activities of the Geological Survey of Estonia (Eesti Geoloogiakeskus, EGK). The abstracts include state budgetary and contractual works, which were finished and submitted to the Depository of Manuscript Reports (the Geological Fund) of Estonia in 2000. Together with brief reviews of published works, the yearbook comprises 60 summaries. These have been compiled by the authors of reports and are numbered in alphabetical order of authors' names. The corresponding numeration has been used also in the indices of authors, subjects and places.
Statistical information on the activities of the Geological Fund in 2000 and information of the EGK staff is presented in the end of the yearbook.
Within the State Geological Research Programme geological map of the crystalline basement of North-Western Estonia at the scale of 1:400 000 (24) was published. Geochemical atlas of parent rocks of Estonian soils was completed (38) comprising geochemical maps for different elements at the scale of 1:200 000 (total 35 sheets). Logging of deep boreholes was carried out on 8 sites and the corresponding report was compiled (55).
In 2000 the programming works, as well as elaboration and supplementing of computerised databases were continued and the corresponding review for 1999 was put together (21).
Within the State Programme of Mineral Resources of Estonia, a monograph on kukersite oil shale, the most important mineral resource of Estonia, was published (18). Two serial publications were issued: Annual of the Geological Survey of Estonia (26) and Bulletin of the Geological Survey of Estonia (19).
Compiling and keeping of the State Register of Mineral Resources, as well as digitising of detailed maps of deposits (56) were continued - 151 deposits and 9 areas with possible reserves were accounted in 2000. Annual summarised balances of the reserves of mineral resources for 1999 (27) were put together to estimate the total reserves of mineral resources of Estonia, as well as the amounts mined out.
Limestone buildings in Rapla County were studied to assess the constructional properties of different limestone beds (32).
The reserves and quality of sapropel and lake lime underlying the peat in mires were investigated in Parnu and Rapla counties (40).
The second stage of arranging of drillcore and rock specimen collections was finished (41). Total 1780 borehole boxes were arranged. The borehole register was supplemented and the photo archives were revised.
Within the State Programme of Groundwater Research, the proved reserves of the Cambrian-Vendian aquifer system were estimated for Johvi, Kohtla-Jarve, Kohtla-Nomme and Kivioli water intakes (50). The content of microcomponents in drinking water was investigated in Harju County (46).
The State Groundwater Cadastre was supplemented (60) and the report on groundwater proved reserves and consumption in 1999 was compiled. On the basis of registration forms submitted to the Geological Fund, the report on bored wells for 1999 was composed (28).
Within the State Monitoring Programme, the coastal monitoring subprogramme (8) and compilation of the cadastre of Estonian coasts were continued (9). The report on seismological monitoring in 1999 was put together (5).
Exploration of mineral resources and groundwater, as well as monitoring were carried out mainly as contractual work. The following is a brief review of the contractual works performed in 2000, the reports of which were submitted to the Geological Fund.
Mineral resources. On the basis of previous investigation results the map of mineral resources for Tartu County was composed (4). Oil shale reserves were re-estimated according to new criteria in Ahtme (16) and Kohtia (17) mining fields. In Kihelkonna Parish (Saaremaa Island) geological investigations were performed to explore the occurrence of carbonate raw material (33). The aim of geological exploration carried out in the surroundings of Kurevere-Sepamaa deposit (Laane County) was to assess the distribution and reserves of technological dolomite (25). Residual reserves of sand were estimated at Kaatsi deposit in Tartu County (3). Geological exploration at Lavassaare deposit (Parnu County) was performed to estimate the gravel reserves (53). In the southern part of Arumetsa deposit (Parnu County) exploration was carried out to find additional reserves of clay suitable for producing ceramsite (31). The possibilities of mining clay suitable for establishing new Paikuse landfill in Parnu County were investigated (52). In Viljandi County the potential exploration areas in the eastern part of Soosaare peat deposit were delimited (29). In Laane County peat reserves of Niibi deposit were investigated and estimated (30).
Groundwater. In 1999 hydrogeological observations were carried out on the territory of Baltic Power Plant in Ida-Viru County (22), in the vicinities of Kurevere dolomite deposit in Laane County (45), on Kopli Peninsula (Tallinn) at water intakes of DEKOIL Ltd. (47) and Baltic Ship Repairers Ltd. (49), and of Pakterminal Ltd. at Muuga Bay (Harju County; 48).
Hydrological and hydrogeological investigations required for detailed planning of servicing complex of Nomme outdoor exercise tracks were carried out in Tallinn (34).
The groundwater pollution level was assessed in the vicinities of Tuula dumping place in Harju County (42) and Viiratsi pigsty complex in Viljandi County (43).
Groundwater proved reserves were prospected at Jogeva (23), Elva (Tartu County; 57) and Kunda (Ida-Viru County; 58) water intakes.
Coast and seabed. To determine the most suitable locality for Saaremaa deep harbour, geological and hydrogeological conditions were studied in three proposed areas in north-western Saaremaa Island (10). In Tallinn City Port's Admiralty Basin the distribution and bedding conditions of bottom deposits were investigated (11). Geological investigations were carried out in the Haapsalu Yachting Harbour (Laane County) to perform seafloor dredging (12) and to install the underwater cables in Muuga Bay (Harju county; 14). To estimate the pollution level of bottom deposits in Haapsalu Bay the content of heavy metals and mineral oils was determined (6). The geodetic surveying on Pirita beach in Tallinn was carried out to identify its development trends (13).
Geophysics. Vertical electrical sounding was done to investigate the geoelectrical section of soil on the territories of Paikuse (Parnu County; 1) and Tartu (2) substations.
Environment. The environmental impact assessment of dredging of Rouhukula-Heltermaa fairway (Laane and Saare counties) was carried out (7). The aim of the environmental audit carried out on the territory to be privatised by Jarvakandi Klaas Ltd was to assess the pollution level of soil (35, 36). Environmental impact assessment of scarp metal storage yards of EMEX Ltd. was continued (37). Within the revision of nature protection conditions of mires, environmental impact assessment of Pilkuse mire (Rapla County) was carried out (39). In Tallinn hydrogeological expert opinion was given for three registered immovables (59).
Information and databases. A catalogue of Estonian topographic maps in Pulkovo 1942 co-ordinate system was composed to facilitate the use of topographic maps (20). Two digital databases were composed: for the bore-holes of Narva opencast field of Estonian oil shale deposit (15), and geological investigation boreholes in Laane-Viru County (54).
[ 1990 / 1991 / 1992 / 1993 / 1994 / 1995 / 1996 / 1997 / 1998 / 1999 / 2000 ]
124 pp.