Sr and Ar isotope studies of detrital smectites from the Atlantic Ocean (D.S.D.P., Legs 43, 48 and 50)

Author(s): Clauer, Norbert; Giblin, Patrick; Lucas, Jacques
Author Affiliation(s): Primary:
Univ. Louis Pasteur, Cent. Sedimentol. et Geochim. Surf., Strasbourg, France
Other:
Soc. Natl. Elf Aquitaine, France
Volume Title: Isotope Geoscience
Source: Isotope Geoscience, 2(2), p.141-151. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0167-6695
Note: In English. 23 refs.Chemical Geology, Vol. 46, No. 2; illus. incl. 2 tables, sketch map
Summary: Mineralogical, morphological and isotopic (Rb-Sr and K-Ar) determinations were made on some detrital smectites of Paleocene and Cenomanian ages. 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 th 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 0.2µm.
Year of Publication: 1984
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 02 Geochemistry; 07 Marine Geology and Oceanography; Absolute age; Alkaline earth metals; Atlantic Ocean; Authigenesis; Clay mineralogy; Clay minerals; DSDP Site 386; DSDP Site 400; DSDP Site 415; Dates; Deep Sea Drilling Project; Diagenesis; Geochemistry; IPOD; Isotopes; K/Ar; Leg 43; Leg 48; Leg 50; Metals; Mineral data; Minerals; Processes; Rb/Sr; Sediments; Sheet silicates; Silicates; Smectite; Sr-87/Sr-86; Stable isotopes; Strontium
Coordinates: N311112 N311113 W0641456 W0641457
N472254 N472254 W0091154 W0091154
N310142 N310142 W0113906 W0113906
Record ID: 1984053992
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