Unknown
PANGAEA
In:
Supplement to: Kurnosov, Victor B; Chudaev, Oleg V; Shevchenko, Alla Ya (1983): Mineralogy and geochemistry of sediments from Galapagos hydrothermal mounds, Leg 70, Deep Sea Drilling Project. In: Honnorez, J; Von Herzen, RP; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 70, 225-233, https://doi.org/10.2973/dsdp.proc.70.110.1983
Publication Date:
2023-08-28
Description:
Clay minerals recovered from the Galapagos hydrothermal mounds (Holes 506C, 507D, and 509B) are mainly iron-rich nontronite-like minerals enriched in potassium. Nontronites from Hole 509B show a distinct tendency to become micaceous toward the lower beds of clay sediments. Mn-crusts consist mainly of todorokite or a mixture of todorokite and nontronite. Minerals of clay and Mnrich sediments in the mounds originated from hydrothermal solutions of uncertain origin. Pelagic oozes from hydrothermal mounds and from areas between mounds (Hole 506D) consist mainly of calcite. In the carbonate beds on or near the hydrothermal mounds an admixture of smectite is often found.
Keywords:
70-506C; 70-506D; 70-507D; 70-509B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg70; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Pacific/MOUND
Type:
Dataset
Format:
application/zip, 4 datasets
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