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Clauer, Norbert; Giblin, Patrick; Lucas, Jacques (1984): Chemical composition and dated ages of detrital smectites in sediments at DSDP Legs 43, 48 and 50. PANGAEA, https://doi.org/10.1594/PANGAEA.707364, Supplement to: Clauer, N et al. (1984): Sr and Ar isotope studies of detrital smectites from the Atlantic Ocean (D.S.D.P., Legs 43, 48 and 50). Isotope Geoscience, 2(2), 141-151, https://doi.org/10.1016/0009-2541(84)90185-2

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Abstract:
Mineralogical, morphological and isotopic (Rb-Sr and K-Ar) determinations were made on some detrital smectites of Palaeocene and Cenomanian ages from DSDP. drillings in the Atlantic Ocean. These minerals are not inert in their depositional environment; authigenic laths grow on detrital sheets with sharp borders. This authigenesis could occur slightly after deposition in a closed system, for some of these smectites. It has been tentatively quantified by the Rb-Sr and K-Ar isotopic methods, which seem also well suited to evaluate the chemical extent of this authigenesis. At least, no preferential loss of 40Ar vs. 87Sr could be detected in the minerals, even in those which are smaller than 0.2 ?m.
Project(s):
Coverage:
Median Latitude: 36.532400 * Median Longitude: -28.366367 * South-bound Latitude: 31.028700 * West-bound Longitude: -64.249000 * North-bound Latitude: 47.381700 * East-bound Longitude: -9.198300
Date/Time Start: 1975-07-24T00:00:00 * Date/Time End: 1976-09-13T00:00:00
Event(s):
43-386 * Latitude: 31.186800 * Longitude: -64.249000 * Date/Time: 1975-07-24T00:00:00 * Elevation: -4782.0 m * Penetration: 973.8 m * Recovery: 434.3 m * Location: North Atlantic/CONT RISE * Campaign: Leg43 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 65 cores; 617.4 m cored; 9.5 m drilled; 70.3 % recovery
48-400A * Latitude: 47.381700 * Longitude: -9.198300 * Date/Time: 1976-05-25T00:00:00 * Elevation: -4399.0 m * Penetration: 777.5 m * Recovery: 334 m * Location: North Atlantic/BASIN * Campaign: Leg48 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 73 cores; 692.5 m cored; 9.5 m drilled; 48.2 % recovery
50-415A * Latitude: 31.028700 * Longitude: -11.651800 * Date/Time: 1976-09-13T00:00:00 * Elevation: -2794.0 m * Penetration: 1079.5 m * Recovery: 29.5 m * Location: North Atlantic/BASIN * Campaign: Leg50 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 1240 m cored; 19 m drilled; 2.4 % recovery
Size:
3 datasets

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