The role of continental lithosphere in the generation of the Karoo volcanic rocks: evidence from combined Nd-and Sr-isotope studies

Hawkesworth, C J; Marsh, Julian S; Duncan, Andrew R; Erlank, Anthony J; Norry, M J

Title: The role of continental lithosphere in the generation of the Karoo volcanic rocks: evidence from combined Nd-and Sr-isotope studies
Creator: Hawkesworth, C J, Marsh, Julian S, Duncan, Andrew R, Erlank, Anthony J, Norry, M J
Date: 1984
Type: text
Type: article
Identifier: http://hdl.handle.net/10962/134165
Identifier: vital:37080
Identifier: https://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetailamp;idt=6453596
Description: 143Nd/144Nd, 87Sr/86Sr, Sm and Nd analyses are reported on suites of Karoo volcanic rocks from the four sub-areas of Nuanetsi-north Lebombo, south Lebombo, the Central area, and north-west SWA/Namibia. Only seven (12%) of the samples analysed have positive ENd values similar to those found in the majority of recent mantle-derived rocks. Most of the rest have negative ENd (-1.0 to -17.1) and positive ESr, (+3.0 to +240) and thus must contain at least a contribution from source areas which were both old, and had lower Sm/Nd and higher Rh/Sr ratios than the bulk earth.
Format: 14 pages, pdf
Language: English
Relation: Special Publication Geological Society South Africa, Hawkesworth, C.J., Marsh, J.S., Duncan, A.R., Erlank, A.J. and Norry, M.J., 1984. The role of continental lithosphere in the generation of the Karoo volcanic rocks: evidence from combined Nd-and Sr-isotope studies. Spec. Publ. Geol. Soc. S. Afr., 13, pp. 341-354., Special Publication Geological Society South Africa number 13 341 354 1984 0367-5335
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Rights: Use of this resource is governed by the terms and conditions of the Author

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