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
Creator: Marsh, Julian S
Creator: Duncan, Andrew R
Creator: Erlank, Anthony J
Creator: Norry, M J
Date Issued: 1984
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
Format: pdf
Language: English
Relation: Special Publication Geological Society South Africa
Relation: 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.
Relation: Special Publication Geological Society South Africa number 13 341 354 1984 0367-5335
Rights: Authors
Rights: Use of this resource is governed by the terms and conditions of the Author

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