Kreuzer_1984.zip (5.67 kB)

Geochemistry and K-Ar dates of the Mazagan granodiorite at V30-225, VA79-96KD and DSDP Hole 79-544A, off Moroccan coast

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posted on 23.11.2019 by H Kreuzer, P Müller, Gerd Wissmann, T Reinecke
Gneissic granodiorite was recovered by drilling at the base of the Mazagan escarpment, 100 km west of the Casablanca, Morocco, at 4000 m water depth. Coarse, predeformative muscovite yielded dates of -515 Ma, fine-grained muscovite of -455 Ma, biotite -360 and 335 Ma, and feldspar -315 Ma. These dates are tentatively correlated with the microscopic results. We assume a minimum age of middle Cambrian for the granodiorite, an Ordovician deformation and mylonitization, and a Late Carboniferous overprint under upper greenschist facies conditions.

History

Year

1984

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2 datasets

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* Median Latitude: 33.762673 * Median Longitude: -9.427516 * South-bound Latitude: 33.74927 * West-bound Longitude: -9.49464 * North-bound Latitude: 33.767 * East-bound Longitude: -9.405 * Date/Time Start: 1973-11-25T00:00:00 * Date/Time End: 1981-04-17T00:00:00

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Deep Sea Drilling Project (DSDP)

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