Organic facies variations in the Mesozoic South Atlantic DSDP Holes

DOI

Visual kerogen and total organic carbon determinations indicate that there are two periods of organic enrichment events in the Mesozoic sediments of the South Atlantic. The first period, from the Late Jurassic through the late Aptian, is recorded in sediments from the Falkland Plateau, the Cape Basin, and the Angola Basin. Apparently, salinity stratification in the restricted basin, coupled with rising sea level, led to bottom water anoxia and organic enrichment. The second event, from the late Albian to the Santonian period, is recorded in sediments from the Angola Basin and the Sao Paulo Plateau. It appears to have been caused by development of an anoxic oxygen minimum zone at midwater depths. Organic matter sedimentation in the Mesozoic South Atlantic is controlled by geologic, climatic, eustatic, and Oceanographic factors.

Supplement to: Gilbert, Deborah (1984): Organic facies variations in the Mesozoic South Atlantic. In: Hay, WW; Sibuet, J-C; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 75, 1035-1049

Identifier
DOI https://doi.org/10.1594/PANGAEA.810223
Related Identifier https://doi.org/10.2973/dsdp.proc.75.135.1984
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.810223
Provenance
Creator Gilbert, Deborah
Publisher PANGAEA
Publication Year 1984
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 10 datasets
Discipline Earth System Research
Spatial Coverage (-46.972W, -51.005S, 15.448E, -11.572N); South Atlantic/PLATEAU; South Atlantic/CONT RISE; South Atlantic; South Atlantic/RIDGE; South Atlantic/SYNCLINE
Temporal Coverage Begin 1974-04-13T00:00:00Z
Temporal Coverage End 1980-07-29T00:00:00Z