Stow, Dorrik A V; Dean, Walter E (1984): (Table 1) Black shale characteristics at DSDP Hole 75-530A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.810102, Supplement to: Stow, DAV; Dean, WE (1984): Middle Cretaceous black shales at Site 530 in the southeastern Angola Basin. In: Hay, WW; Sibuet, J-C; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 75, 809-817, https://doi.org/10.2973/dsdp.proc.75.120.1984
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Published: 1984 (exact date unknown) • DOI registered: 2013-05-09
Abstract:
The middle Cretaceous black shale interval at Site 530 is 170 m thick and late Albian to Coniacian in age. The organic-carbon-rich sediments occur as 260 separate beds (average 4 cm, maximum 60 cm thick) and make up less than 10% of the recovered section. Associated lithologies are greenish, grayish, and reddish mudstones, marlstones, and rare limestones. Organic-carbon contents of the black shales average about 5% (maximum 16%), and of the interbedded sediments, less than 0.5%. Careful study of the sedimentary and biogenic structures and composition and review of paleoceanographic conditions in the Angola Basin indicate that a complex interplay of processes controlled black shale accumulation. Relatively low oxygen concentrations in sediment and bottom waters occurred periodically, and conditions locally may have been anoxic or near anoxic both in the basin and on the continental margin. Pelagic, hemipelagic, and turbiditic depositional processes all operated to varying degrees at different times.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -19.187700 * Longitude: 9.385800
Date/Time Start: 1980-07-29T00:00:00 * Date/Time End: 1980-07-29T00:00:00
Minimum Elevation: -4629.0 m * Maximum Elevation: -4629.0 m
Event(s):
75-530A * Latitude: -19.187700 * Longitude: 9.385800 * Date/Time: 1980-07-29T00:00:00 * Elevation: -4629.0 m * Penetration: 1121 m * Recovery: 617.5 m * Location: South Atlantic/RIDGE * Campaign: Leg75 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 107 cores; 986.5 m cored; 9.5 m drilled; 62.6 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Stow, Dorrik A V | DSDP/ODP/IODP sample designation | ||
| 2 | Length Recovered | Length Recovered | m | Stow, Dorrik A V | ||
| 3 | Number of beds | n beds | # | Stow, Dorrik A V | Of black shale | |
| 4 | Sample thickness | Samp thick | cm | Stow, Dorrik A V | Total thickness of black shale beds | |
| 5 | Sample thickness | Samp thick | cm | Stow, Dorrik A V | Average | |
| 6 | Standard deviation | Std dev | ± | Stow, Dorrik A V | Of average sample thickness | |
| 7 | Percentage | Perc | % | Stow, Dorrik A V | Of total core thickness | |
| 8 | Carbon, organic, total | TOC | % | Stow, Dorrik A V | #1, black shale | |
| 9 | Carbon, organic, total | TOC | % | Stow, Dorrik A V | #2, black shale | |
| 10 | Carbon, organic, total | TOC | % | Stow, Dorrik A V | #1, gray shale | |
| 11 | Carbon, organic, total | TOC | % | Stow, Dorrik A V | #2, gray shale | |
| 12 | Carbon, organic, total | TOC | % | Stow, Dorrik A V | #1, other | |
| 13 | Carbon, organic, total | TOC | % | Stow, Dorrik A V | #2, other | |
| 14 | Carbon, organic, total | TOC | % | Stow, Dorrik A V | #3, other | |
| 15 | Carbon, organic, total | TOC | % | Stow, Dorrik A V | #4, other |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
191 data points