We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Sedimentology, geochemistry, and biota of Volgian carbonaceous sequences in the northern part of the central Russian Sea (Kostroma region).
- Authors
Gavrilov, Yu. O.; Shchepetova, E. V.; Rogov, M. A.; Shcherbinina, E. A.
- Abstract
Lithological, geochemical, stratigraphic, and paleoecological features of carbonaceous sediments in the Late Jurassic Volgian Basin of the East European Platform (Kostroma region) are considered. The shalebearing sequence studied is characterized by greater sedimentological completeness as compared with its stratotype sections in the Middle Volga region (Gorodishche, Kashpir). Stratigraphic position and stratigraphy of the shale-bearing sequence, as well as the distribution of biota in different sedimentation settings, are specified. It is shown that Volgian sediments show a distinct cyclic structure. The lower and upper elements of cyclites consist of high-carbonaceous shales and clayey-calcareous sediments, respectively, separated by transitional varieties. Bioturbation structures in different rocks are discussed. Microcomponent composition and pyrolytic parameters of organic matter, as well as distribution of chemical elements in the lithologically variable sediments are analyzed. Possible reasons responsible for the appearance of cyclicity and accumulation of organicrich sediments are discussed.
- Subjects
VOLGA River (Russia); RUSSIA; SEDIMENTOLOGY; ANALYTICAL geochemistry; STRATIGRAPHIC geology; JURASSIC paleoecology; SEDIMENTARY structures; GEOCHEMISTRY
- Publication
Lithology & Mineral Resources, 2008, Vol 43, Issue 4, p354
- ISSN
0024-4902
- Publication type
Article
- DOI
10.1134/S002449020804007X