Les phases precoces et profondes du magmatisme des iles Kerguelen revelees par les enclaves basiques et ultrabasiques

M. Gregoire; H. Leyrit; J. Y. Cottin; A. Giret; N. Mattielli

Les phases precoces et profondes du magmatisme des iles Kerguelen revelees par les enclaves basiques et ultrabasiques

Translated title of the contribution: The initial deep steps of Kerguelen magmatism revealed from basic and ultrabasic xenoliths

M. Gregoire, H. Leyrit, J. Y. Cottin, A. Giret, N. Mattielli

ARC Centre of Excellence for Core to Crust Fluid Systems (incorporation ARC National Key Centre for Geochemical evolution and Metallogeny of Continents (GEMOC))

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Numerous basic and ultrabasic xenoliths have been discovered within volcanic formations of the Kerguelen Islands. Three groups can be distinguished according to their textural features: 1) mantle xenoliths (residual harzburgites); 2) the ultrabasic and basic xenoliths with relics of magmatic textures; 3) crustal magmatic xenoliths. The two pyroxene-Al spinel xenoliths from type (2) could belong to cumulative series fractionated from an aluminous basalt (transitional?) in the conditions of crust-mantle boundary (16-20km) (underplating). Fe-Ri rich and type (3) xenoliths could be alkaline cumulates. There is an abridged English version. -English summary

Translated title of the contribution	The initial deep steps of Kerguelen magmatism revealed from basic and ultrabasic xenoliths
Original language	French
Pages (from-to)	1203-1209
Number of pages	7
Journal	Comptes Rendus - Academie des Sciences, Serie II
Volume	314
Issue number	11
Publication status	Published - 1992

Cite this

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abstract = "Numerous basic and ultrabasic xenoliths have been discovered within volcanic formations of the Kerguelen Islands. Three groups can be distinguished according to their textural features: 1) mantle xenoliths (residual harzburgites); 2) the ultrabasic and basic xenoliths with relics of magmatic textures; 3) crustal magmatic xenoliths. The two pyroxene-Al spinel xenoliths from type (2) could belong to cumulative series fractionated from an aluminous basalt (transitional?) in the conditions of crust-mantle boundary (16-20km) (underplating). Fe-Ri rich and type (3) xenoliths could be alkaline cumulates. There is an abridged English version. -English summary",

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AU - Gregoire, M.

AU - Leyrit, H.

AU - Cottin, J. Y.

AU - Giret, A.

AU - Mattielli, N.

PY - 1992

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N2 - Numerous basic and ultrabasic xenoliths have been discovered within volcanic formations of the Kerguelen Islands. Three groups can be distinguished according to their textural features: 1) mantle xenoliths (residual harzburgites); 2) the ultrabasic and basic xenoliths with relics of magmatic textures; 3) crustal magmatic xenoliths. The two pyroxene-Al spinel xenoliths from type (2) could belong to cumulative series fractionated from an aluminous basalt (transitional?) in the conditions of crust-mantle boundary (16-20km) (underplating). Fe-Ri rich and type (3) xenoliths could be alkaline cumulates. There is an abridged English version. -English summary

AB - Numerous basic and ultrabasic xenoliths have been discovered within volcanic formations of the Kerguelen Islands. Three groups can be distinguished according to their textural features: 1) mantle xenoliths (residual harzburgites); 2) the ultrabasic and basic xenoliths with relics of magmatic textures; 3) crustal magmatic xenoliths. The two pyroxene-Al spinel xenoliths from type (2) could belong to cumulative series fractionated from an aluminous basalt (transitional?) in the conditions of crust-mantle boundary (16-20km) (underplating). Fe-Ri rich and type (3) xenoliths could be alkaline cumulates. There is an abridged English version. -English summary

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Les phases precoces et profondes du magmatisme des iles Kerguelen revelees par les enclaves basiques et ultrabasiques

Abstract

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