|
|
|
UDC (550.84/.85:552.5)(571.16)
LITHOGENETIC DEPOSIT TYPES OF THE BAZHENOV FORMATION IN THE SOUTH-MAYA LOCAL HIGH FROM CORE DATA ACQUIRED IN THE WELL NO. 413 (TOMSK REGION)
N. M. Nedolivko, A. V. Ezhova
Deposits of the Bazhenov (J3vbg) Formation penetrated at the South-Maya high by the well no. 413 (Tomsk Region) were characterized based on petrographic and X-ray phase analysis data. Six lithotypes were defined relying on structural and textural features and material composition: 1 – bituminous siliceous-hydromicaceous mudstones with terrigenous admixture, remains of phosphatized marcofauna and radiolaria; 2 – bituminous siliceous-hydromicaceous mudstones with silica lenses and interburdens, remains of phosphatized marcofauna and radiolaria; 3 – bituminous hydromicaceous-siliceous finely levigated mudstones with remains of radiolaria and phosphatized marcofauna; 4 – carbonized radiolarian earth with marcofauna remains; 5 – bituminous siliceous-hydromicaceous mudstones with radiolaria and fragments of phosphatized and calcitized microfauna; 6 – bituminous siliceous-hydromicaceous mudstones with hydromicaceous and silty lenses, remains of marcofauna and radiolaria. It was found out that the Bazhenov deposits were accumulated under the deep-water epicontinental basin conditions, first during slow downwarping (lithotypes one to four) and than uplift (lithotypes five to six) of the sea bed.
Key words: Bazhenov Formation, mudstones, bituminous mudstones, radiolarian earth, lithotypes, South-Maya high, Tomsk Region.
|
|
|
|
© SNIIGGiMS, 2017. All rights reserved. | 67 Krasny pr., Novosibirsk, 630091 Russia. Tel.: 73832214947, 73832214980, fax: 73832214947