Processing results from drill hole VNIIO-1984-80 (North Kildinskaya Area) (Report 5912, Leningrad)

DOI

The hole was drilled in the North Kildinskaya Area in the southern part of the Barents Sea within the South Barents tectonic depression.Reasons for drilling:1. Specification of the geological structure of the area and obtaining data for stratification of the geological section and its allocation with reflecting seismic horizons.2. Specification of the boundary between the Permian and Triassic deposits and study of composition of the Permian deposits and their geological structure.3. Study of properties, composition and lithologic-facial features of sedimentary rocks.Technical results:The hole has penetrated the section up to 3326 m and stopped in Upper Permian deposits.Scientific results:1. Within the studied geological section a lithologic and stratigraphic sequence of sedimentary rocks (based on microfauna, spora and pollen spectra, bivalve mollusks, and lithologic composition) from Late Permian to Quaternary deposits has been carried out.2. Thicknesses of the units are as followed: Late Permian - 850 m (Guadalupian - 207 m, Early Lopingian - 405 m, Late Lopingian - 238 m), Early-Middle Triassic (Induan-Anisian) - 921 m, Middle Triassic (Ladinian) - 70 m, Late Triassic - 375 m, Early Jurassic - 180 m, Middle Jurassic - 210 m, Late Jurassic - 50 m, Early Cretaceous - >315 m (Hauterivian-Barremian - 35 m, Barremian - 90 m, Barremian-Aptian - 80 m, Aptian - 110 m).3. Late Permian terrigenous deposits accumulated in a marine basin and in shallow marine and lagoonal marine conditions. Products of disintegration of basic metamorphic rocks of greenschist facies also entered the basin of sedimentation. The most altered organic matter occurs in the deposits.4. The Early and Middle Triassic deposits accumulated in intermediate conditions between marine (deposits from the Svalbard area) and lagoonal-continental (deposits from the Kolguev Island area). Products of disintegration of basic metamorphic rocks also entered the basin of sedimentation.5. Late Triassic sedimentation was in continental (coal-bearing layers) and nearshore-continental conditions.6. The most marine conditions occurred in the Early-Middle Jurassic.7. In the late Jurassic the stable marine regime of sedimentation occurred.8. Gradual transition of Jurassic and Early Cretaceous sediments is supposed. The main features of the transitional layers is similar to ones of coeval layers from the Western Svalbard and differ from ones from the Kolguev Island and Murmansk area.

Identifier
DOI https://doi.org/10.1594/PANGAEA.690554
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.690554
Provenance
Creator Pchelina, Tatyana M; Bro, Evgeny G; Komarnitsky, Valery M
Publisher PANGAEA
Contributor All-Russian Research Institute for Geology and Mineral Resources of the World Ocean, St. Petersburg
Publication Year 1985
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Publication Series of Datasets; Collection
Format application/zip
Size 7 datasets
Discipline Earth System Research
Spatial Coverage (36.500 LON, 71.333 LAT); Barents Sea