Unknown
PANGAEA
In:
Supplement to: Chamley, Hervè; Debrabant, Pierre (1984): Mineralogical and geochemical investigations of sediments on the Mazagan Plateau, northwestern African Margin (Leg 79, Deep Sea Drilling Project). In: Hinz, K; Winterer, EL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 79, 497-508, https://doi.org/10.2973/dsdp.proc.79.116.1984
Publication Date:
2024-01-19
Description:
Detailed mineralogical and geochemical studies were performed on samples from selected time intervals recovered during Leg 79 on the Mazagan Plateau. The uppermost Albian and Cenomanian sediments of Sites 545 and 547 can be correlated on the basis of mineralogy and geochemistry; these sediments illustrate differential settling processes and the existence of hot climates with alternating humid and dry seasons in the African coastal zone. The upper Aptian to Albian black shales of Site 545 point to an irregular alternation of tectonic activity and relaxation stages, allowing different behaviors in the reworking of soils, crystalline rocks, and sediments born in peri-marine basins. The barren lower Mesozoic reddish sediments and evaporitic series of Sites 546 and 547 are characterized by a strong physical erosion of sialic landscapes, without clear evidence of post-depositional metamorphic events. At Site 546 strong early diagenetic processes in a confined evaporitic environment affect both the mineralogy and the geochemistry of pre-Miocene rocks.
Keywords:
79-545; 79-546; 79-547A; 79-547B; Aluminium oxide; Atomic absorption spectrometry (AAS); Calcium oxide; Chromium; Cobalt; Colorimetry; Copper; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Iron oxide, Fe2O3; Latitude of event; Lead; Leg79; Lithium; Longitude of event; Magnesium oxide; Manganese; Nickel; North Atlantic/PLATEAU; Phosphorus pentoxide; Potassium oxide; Sample code/label; see reference(s); Silicon dioxide; Sodium oxide; Strontium; Titanium dioxide; Vanadium; Zinc
Type:
Dataset
Format:
text/tab-separated-values, 1250 data points
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