Geochemistry of basaltic rocks from ODP Hole 183-1137A on the Kerguelen Plateau
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2002
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| _version_ | 1867171357158014976 |
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| author | Ingle, Stephanie Weis, Dominique A M Scoates, James S Frey, Frederick A |
| author_facet | Ingle, Stephanie Weis, Dominique A M Scoates, James S Frey, Frederick A |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_710991 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemistry of basaltic rocks from ODP Hole 183-1137A on the Kerguelen Plateau Ingle, Stephanie Weis, Dominique A M Scoates, James S Frey, Frederick A 183-1137A; DRILL; Drilling/drill rig; Indian Ocean; Joides Resolution; Leg183; Ocean Drilling Program; ODP 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. |
| title | Geochemistry of basaltic rocks from ODP Hole 183-1137A on the Kerguelen Plateau |
| topic | 183-1137A; DRILL; Drilling/drill rig; Indian Ocean; Joides Resolution; Leg183; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.710991 |