Relationship between the early Kerguelen plume and continental flood basalts of the paleo-eastern Gondwanan margins

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doi: 10.1016/S0012-821X(02)00473-9
Author(s): Ingle, Stephanie; Weis, Dominique; Scoates, James S.; Frey, Frederick A.
Author Affiliation(s): Primary:
Université Libre de Bruxelles, Département des Sciences de la Terre et de l'Environnement, Brussels, Belgium
Other:
Massachusetts Institute of Technology, Cambridge, MA, United States
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, 197(1-2), p.35-50. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. 63 refs.; illus., incl. strat. col., 2 tables, sketch maps
Summary: Cretaceous basalts recovered during Ocean Drilling Program Leg 183 at Site 1137 on the Kerguelen Plateau show remarkable geochemical similarities to Cretaceous continental tholeiites located on the continental margins of eastern India (Rajmahal Traps) and southwestern Australia (Bunbury basalt). Major and trace element and Sr-Nd-Pb isotopic compositions of the Site 1137 basalts are consistent with assimilation of Gondwanan continental crust (from 5 to 7%) by Kerguelen plume-derived magmas. In light of the requirement for crustal contamination of the Kerguelen Plateau basalts, we re-examine the early tectonic environment of the initial Kerguelen plume head. Although a causal role of the Kerguelen plume in the breakup of Eastern Gondwana cannot be ascertained, we demonstrate the need for the presence of the Kerguelen plume early during continental rifting. Activity resulting from interactions by the newly formed Indian and Australian continental margins and the Kerguelen plume may have resulted in stranded fragments of continental crust, isolated at shallow levels in the Indian Ocean lithosphere. Abstract Copyright (2002) Elsevier, B.V.
Year of Publication: 2002
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 18 Geophysics, Solid-Earth; Alkaline earth metals; Antarctica; Asia; Australasia; Australia; Basalts; Continental crust; Continental drift; Continental margin; Correlation; Cretaceous; Crust; Enrichment; Flood basalts; Geochemistry; Gondwana; Igneous rocks; India; Indian Ocean; Indian Peninsula; Isotope ratios; Isotopes; Kerguelen Plateau; Lead; Leg 183; Lithogeochemistry; Lithosphere; Magma contamination; Major elements; Mantle; Mantle plumes; Mesozoic; Metals; Nd-144/Nd-143; Neodymium; ODP Site 1137; Ocean Drilling Program; Pb-206/Pb-204; Pb-207/Pb-204; Pb-208/Pb-204; Plate tectonics; Radioactive isotopes; Rare earths; Rifting; Sr-87/Sr-86; Stable isotopes; Strontium; Trace elements; Volcanic rocks
Coordinates: S565000 S565000 E0680536 E0680536
Record ID: 2002035420
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands