A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions
The magma types belonging to the Gondwana large igneous province can be divided into two categories based on, respectively, their primitive mantle-like and fractionated Sm/Yb and Sr/Zr values, different Sr and Nd isotopic trends, and geographic affinity to the Weddell and Limpopo triple junctions. I...
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U.S. Geological Survey, National Academy Press
2007
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ftnerc:oai:nora.nerc.ac.uk:15760 2023-05-15T16:02:40+02:00 A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions Luttinen, A.V. Leat, P.T. Cooper, A.K. Raymond, C.R. ISAES Editorial Team, . 2007 http://nora.nerc.ac.uk/id/eprint/15760/ http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea175.pdf unknown U.S. Geological Survey, National Academy Press Luttinen, A.V.; Leat, P.T. 2007 A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions. In: Cooper, A.K.; Raymond, C.R.; ISAES Editorial Team, ., (eds.) Antarctica: a keystone in a changing world. Online proceedings of the 10th International Symposium on Antarctic Earth Sciences, Santa Barbara, California, August 26 - September 1, 2007. U.S. Geological Survey, National Academy Press, 4pp. (U.S. Geological Survey Open-File Report, 2007-1047, Exten). Earth Sciences Publication - Book Section NonPeerReviewed 2007 ftnerc 2023-02-04T19:30:05Z The magma types belonging to the Gondwana large igneous province can be divided into two categories based on, respectively, their primitive mantle-like and fractionated Sm/Yb and Sr/Zr values, different Sr and Nd isotopic trends, and geographic affinity to the Weddell and Limpopo triple junctions. In the new grouping, the Ferrar magmas, the Karoo Central Area magmas, and the Kirwanveggen-Sembberget magmas from Dronning Maud Land are viewed as three major magmatic lineages generated at the Weddell triple junction. These Weddell group magmas were produced by voluminous low-pressure partial melting of possibly subduction-modified upper mantle and tended to be laterally transported over long distances. The Limpopo group magmas include the Karoo high-Ti magma types and various low- Ti types from Lebombo, Vestfjella, and Heimefrontfjella. They represent magmas that were produced at high pressure from an eclogite-bearing mantle source below the Kaapvaal craton. The distribution of the Limpopo group magmas was mainly confined within the rift valleys of the Limpopo triple junction. The chemically distinctive magma types probably reflect heterogeneities in the Weddell and Limpopo magma sources and lithospheric level differentiation within Archean (Limpopo group) and younger lithospheric terranes. Book Part Dronning Maud Land Natural Environment Research Council: NERC Open Research Archive Dronning Maud Land Heimefrontfjella ENVELOPE(-11.000,-11.000,-74.667,-74.667) Kirwanveggen ENVELOPE(-3.500,-3.500,-73.500,-73.500) Sembberget ENVELOPE(-8.200,-8.200,-74.483,-74.483) Vestfjella ENVELOPE(-14.000,-14.000,-73.167,-73.167) Weddell |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Luttinen, A.V. Leat, P.T. A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions |
topic_facet |
Earth Sciences |
description |
The magma types belonging to the Gondwana large igneous province can be divided into two categories based on, respectively, their primitive mantle-like and fractionated Sm/Yb and Sr/Zr values, different Sr and Nd isotopic trends, and geographic affinity to the Weddell and Limpopo triple junctions. In the new grouping, the Ferrar magmas, the Karoo Central Area magmas, and the Kirwanveggen-Sembberget magmas from Dronning Maud Land are viewed as three major magmatic lineages generated at the Weddell triple junction. These Weddell group magmas were produced by voluminous low-pressure partial melting of possibly subduction-modified upper mantle and tended to be laterally transported over long distances. The Limpopo group magmas include the Karoo high-Ti magma types and various low- Ti types from Lebombo, Vestfjella, and Heimefrontfjella. They represent magmas that were produced at high pressure from an eclogite-bearing mantle source below the Kaapvaal craton. The distribution of the Limpopo group magmas was mainly confined within the rift valleys of the Limpopo triple junction. The chemically distinctive magma types probably reflect heterogeneities in the Weddell and Limpopo magma sources and lithospheric level differentiation within Archean (Limpopo group) and younger lithospheric terranes. |
author2 |
Cooper, A.K. Raymond, C.R. ISAES Editorial Team, . |
format |
Book Part |
author |
Luttinen, A.V. Leat, P.T. |
author_facet |
Luttinen, A.V. Leat, P.T. |
author_sort |
Luttinen, A.V. |
title |
A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions |
title_short |
A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions |
title_full |
A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions |
title_fullStr |
A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions |
title_full_unstemmed |
A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions |
title_sort |
revised geochemical grouping of gondwana lip: distinctive sources and processes at the weddell and limpopo triple junctions |
publisher |
U.S. Geological Survey, National Academy Press |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/15760/ http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea175.pdf |
long_lat |
ENVELOPE(-11.000,-11.000,-74.667,-74.667) ENVELOPE(-3.500,-3.500,-73.500,-73.500) ENVELOPE(-8.200,-8.200,-74.483,-74.483) ENVELOPE(-14.000,-14.000,-73.167,-73.167) |
geographic |
Dronning Maud Land Heimefrontfjella Kirwanveggen Sembberget Vestfjella Weddell |
geographic_facet |
Dronning Maud Land Heimefrontfjella Kirwanveggen Sembberget Vestfjella Weddell |
genre |
Dronning Maud Land |
genre_facet |
Dronning Maud Land |
op_relation |
Luttinen, A.V.; Leat, P.T. 2007 A revised geochemical grouping of Gondwana LIP: distinctive sources and processes at the Weddell and Limpopo triple junctions. In: Cooper, A.K.; Raymond, C.R.; ISAES Editorial Team, ., (eds.) Antarctica: a keystone in a changing world. Online proceedings of the 10th International Symposium on Antarctic Earth Sciences, Santa Barbara, California, August 26 - September 1, 2007. U.S. Geological Survey, National Academy Press, 4pp. (U.S. Geological Survey Open-File Report, 2007-1047, Exten). |
_version_ |
1766398333444685824 |