10.1594/PANGAEA.746749
Tyson, Richard V
Richard V
Tyson
Palynofacies investigation of Callovian sediments of DSDP Hole 79-534A
PANGAEA
1984
Drilling/drill rig
Leg76
Glomar Challenger
Deep Sea Drilling Project (DSDP)
1980-10-21T00:00:00
en
Supplementary Publication Series of Datasets
10.1016/0264-8172(84)90116-8
3 datasets
application/zip
Creative Commons Attribution 3.0 Unported
During the extension of Deep Sea Drilling Project (DSDP) Leg 76 a new and previously unpenetrated lithological unit composed mainly of claystones was cored above basalt basement at Site 534 in the Blake-Bahama Basin. The Callovian part of the new unit contains interbedded 'black shales' which were hitherto unexpected in this part of the section. This Paper presents a brief palynological examination of lithofacies-kerogen relationships in these sediments and shows that their organic content is almost entirely a function of the re-deposition of terrestial and marine organic matter versus the ambient redox conditions of the depositional environment. Allochthonous organic matter inputs are highest in the interbedded turbidites and decline progressively toward the pelagic black shales in which marine organic matter is comparatively well preserved. The significance of various kerogen and palynomorph indices are discussed. The study emphasizes the absolute necessity for sedimentologically-aware sampling in all palynological and geochemical work on lithologically heterogeneous sequences.
Supplement to: Tyson, Richard V (1984): Palynofacies investigation of Callovian (Middle Jurassic) sediments from DSDP Site 534, Blake-Bahama Basin, Western Central Atlantic. Marine and Petroleum Geology, 1(1), 3-13
-75.3817
28.3433
North Atlantic/BASIN