Petrologie et geochimie des basaltes de Murta: Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili

Alain Demant; Mauricio Belmar; Francisco Hervé; Robert J. Pankhurst; Manuel Suárez

doi:10.1016/S1251-8050(99)80053-6

Petrologie et geochimie des basaltes de Murta: Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili

Translated title of the contribution: Petrology and geochemistry of the Murta basalts: A subglacial eruption in the Patagonian Andes (46°lat. S.), Chile. Relationship with the subduction of the Chile Ridge

Alain Demant, Mauricio Belmar, Francisco Hervé, Robert J. Pankhurst, Manuel Suárez

Engineering School

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15 Citations (Scopus)

Abstract

The Holocene Murta basalts represent a small volume monogenetic centre located in the northern Patagonian Andes at the latitude of the Chile Triple Junction. These basalts show morphological evidence of subglacial eruption. They are locally porphyritic with large plagioclase feldspar, clinopyroxene and olivine megacrysts. The major- and trace-element concentrations, REE patterns, and isotopic data, distinguish them clearly from the other Holocene arc basalts or the Palaeocene back-arc lavas. Their asthenospheric signature is in accordance with a geodynamic context characterised, since the Miocene, by the subduction of the Chile Ridge below the South American Plate and the progressive development of a slab window.

Translated title of the contribution	Petrology and geochemistry of the Murta basalts: A subglacial eruption in the Patagonian Andes (46°lat. S.), Chile. Relationship with the subduction of the Chile Ridge
Original language	French
Pages (from-to)	795-801
Number of pages	7
Journal	Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes
Volume	327
Issue number	12
DOIs	https://doi.org/10.1016/S1251-8050(99)80053-6
Publication status	Published - Dec 1998

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Ocean Engineering

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Demant, A., Belmar, M., Hervé, F., Pankhurst, R. J., & Suárez, M. (1998). Petrologie et geochimie des basaltes de Murta: Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili. Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes, 327(12), 795-801. https://doi.org/10.1016/S1251-8050(99)80053-6

Demant, Alain ; Belmar, Mauricio ; Hervé, Francisco et al. / Petrologie et geochimie des basaltes de Murta : Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili. In: Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes. 1998 ; Vol. 327, No. 12. pp. 795-801.

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title = "Petrologie et geochimie des basaltes de Murta: Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili",

abstract = "The Holocene Murta basalts represent a small volume monogenetic centre located in the northern Patagonian Andes at the latitude of the Chile Triple Junction. These basalts show morphological evidence of subglacial eruption. They are locally porphyritic with large plagioclase feldspar, clinopyroxene and olivine megacrysts. The major- and trace-element concentrations, REE patterns, and isotopic data, distinguish them clearly from the other Holocene arc basalts or the Palaeocene back-arc lavas. Their asthenospheric signature is in accordance with a geodynamic context characterised, since the Miocene, by the subduction of the Chile Ridge below the South American Plate and the progressive development of a slab window.",

keywords = "Andes, Chile Ridge, Geochemistry, Geodynamic context, Petrology, Volcanism",

author = "Alain Demant and Mauricio Belmar and Francisco Herv{\'e} and Pankhurst, {Robert J.} and Manuel Su{\'a}rez",

year = "1998",

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Demant, A, Belmar, M, Hervé, F, Pankhurst, RJ & Suárez, M 1998, 'Petrologie et geochimie des basaltes de Murta: Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili', Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes, vol. 327, no. 12, pp. 795-801. https://doi.org/10.1016/S1251-8050(99)80053-6

Petrologie et geochimie des basaltes de Murta: Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili. / Demant, Alain; Belmar, Mauricio; Hervé, Francisco et al.
In: Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes, Vol. 327, No. 12, 12.1998, p. 795-801.

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

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T2 - Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili

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AB - The Holocene Murta basalts represent a small volume monogenetic centre located in the northern Patagonian Andes at the latitude of the Chile Triple Junction. These basalts show morphological evidence of subglacial eruption. They are locally porphyritic with large plagioclase feldspar, clinopyroxene and olivine megacrysts. The major- and trace-element concentrations, REE patterns, and isotopic data, distinguish them clearly from the other Holocene arc basalts or the Palaeocene back-arc lavas. Their asthenospheric signature is in accordance with a geodynamic context characterised, since the Miocene, by the subduction of the Chile Ridge below the South American Plate and the progressive development of a slab window.

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Demant A, Belmar M, Hervé F, Pankhurst RJ, Suárez M. Petrologie et geochimie des basaltes de Murta: Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili. Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes. 1998 Dec;327(12):795-801. doi: 10.1016/S1251-8050(99)80053-6

Petrologie et geochimie des basaltes de Murta: Une eruption sous-glaciaire dans les Andes patagoniennes (46°lat. S.), Chili. Relation avec la subduction de la ride du Chili

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