Gostin, V. A.; Moriarty, K. C. (1975): Investigations of Tertiary clay mineral distributions around Tasmania, DSDP, Leg 29. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, Initial Reports of the Deep Sea Drilling Project, 29 (Lyttleton, N. Z. to Wellington, N. Z.; March-April 1973), 1077-1082, georefid:1976-016987

Abstract:
Clay minerals from Tertiary samples of DSDP sites 280, 281, 282, and 283 were analyzed mainly by X-ray diffraction and cation exchange methods. Site 282, off the Tasmanian west coast, contains a persistent Australian clay mineral assemblage that reflects deep weathering conditions in Tasmania and basic volcanism increasing from Eocene into the Oligocene. Site 280, south of the South Tasman Rise, was probably situated close to Antarctica in the Eocene-Oligocene and shows a change from temperate source area condition in the Early(?) and Middle Eocene, to cold-glacial conditions in the Latest Eocene and Oligocene. This is supported by Oligocene-Miocene data from cores near Antarctica. It is unlikely that any deep oceanic connection existed between the basins on either side of the South Tasman Rise until probably the Late Oligocene when the circum-Antarctic current developed.
Coverage:
West: 143.0000 East: 177.0000 North: -39.3000 South: -57.0000
West: NaN East: NaN North: NaN South: NaN
Relations:
Expedition: 29
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/dsdp.proc.29.134.1975 (c.f. for more detailed metadata)
Data download: application/pdf
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