Dean, Walter E; Parduhn, Nancy L (1984): Geochemistry at DSDP Leg 75 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.810402, Supplement to: Dean, WE; Parduhn, NL (1984): Inorganic geochemistry of sediments and rocks recovered from the southern Angola Basin and Adjacent Walvis Ridge, Sites 530 and 532, Deep Sea Drilling Project Leg 75. In: Hay, WW; Sibuet, J-C; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 75, 923-958, https://doi.org/10.2973/dsdp.proc.75.127.1984
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Abstract:
Samples of sediments and rocks collected at DSDP Sites 530 and 532 were analyzed for 44 major, minor, and trace elements for the following purposes: (1) to document the downhole variability in geochemistry within and between lithologic units; (2) to document trace-element enrichment, if any, in Cretaceous organic-carbon-rich black shales at Site 530; (3) to document trace-element enrichment, if any, in Neogene organic-carbon-rich sediments at Site 532; (4) to document trace-element enrichment, if any, in red claystone above basalt basement at Site 530 that might be attributed to hydrothermal activity or weathering of basalt. Results of the geochemical analyses showed that there are no significant enrichments of elements in the organic-carbon-rich sediments at Site 532, but a number of elements, notably Cd, Co, Cr, Cu, Mo, Ni, Pb, V, and Zn, are enriched in the Cretaceous black shales. These elements have different concentration gradients within the black-shale section, however, which suggests that there was differential mobility of trace elements during diagenesis of interbedded more-oxidized and less-oxidized sediments. There is little or no enrichment of elements from hydrothermal activity in the red claystone immediately overlying basalt basement at Site 530, but slight enrichments of several elements in the lowest meter of sediment may be related to subsea weathering of basalt
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -19.465800 * Median Longitude: 9.952400 * South-bound Latitude: -19.744300 * West-bound Longitude: 9.385800 * North-bound Latitude: -19.187700 * East-bound Longitude: 10.518800
Date/Time Start: 1980-07-29T00:00:00 * Date/Time End: 1980-08-20T00:00:00
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
75-530B * Latitude: -19.187700 * Longitude: 9.386200 * Date/Time: 1980-07-29T00:00:00 * Elevation: -4629.0 m * Penetration: 180.6 m * Recovery: 153.6 m * Location: South Atlantic/RIDGE * Campaign: Leg75 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 45 cores; 172.2 m cored; 8.4 m drilled; 89.2 % recovery
75-532 * Latitude: -19.743500 * Longitude: 10.518800 * Date/Time: 1980-08-20T00:00:00 * Elevation: -1331.0 m * Penetration: 250.8 m * Recovery: 232 m * Location: South Atlantic * Campaign: Leg75 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 59 cores; 242.8 m cored; 8 m drilled; 95.6 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Dean, WE; Parduhn, NL (1984): (Table 2) Geochemistry at DSDP Hole 75-530A. https://doi.org/10.1594/PANGAEA.810397
- Dean, WE; Parduhn, NL (1984): (Table 3) Geochemistry at DSDP Hole 75-530B. https://doi.org/10.1594/PANGAEA.810399
- Dean, WE; Parduhn, NL (1984): (Table 4A) Geochemistry at DSDP Hole 75-532. https://doi.org/10.1594/PANGAEA.810400
- Dean, WE; Parduhn, NL (1984): (Table 4B) Geochemistry at DSDP Hole 75-532B. https://doi.org/10.1594/PANGAEA.810401