Grenvillian massif-type anorthosites in the Sierras Pampeanas

C. Casquet; R. J. Pankhurst; C. W. Rapela; C. Galindo; J. Dahlquist; E. Baldo; J. Saavedra; J. M.González Casado; C. M. Fanning

doi:10.1144/0016-764904-100

Grenvillian massif-type anorthosites in the Sierras Pampeanas

C. Casquet^*, R. J. Pankhurst, C. W. Rapela, C. Galindo, J. Dahlquist, E. Baldo, J. Saavedra, J. M.González Casado, C. M. Fanning

^*Corresponding author for this work

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

53 Citations (Scopus)

Abstract

We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U-Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 Ma for igneous emplacement and 431 ± 40 Ma for metamorphism. These anorthosites are petrologically and geochemically comparable with those of the Grenville province of Laurentia. Palaeogeographical reconstructions of Rodinia at 1.0-1.1 Ga suggest that the Sierras Pampeanas anorthosites were part of a large anorthosite province in the late Mesoproterozoic.

Original language	English
Pages (from-to)	9-12
Number of pages	4
Journal	Journal of the Geological Society
Volume	162
Issue number	1
DOIs	https://doi.org/10.1144/0016-764904-100
Publication status	Published - Jan 2005

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title = "Grenvillian massif-type anorthosites in the Sierras Pampeanas",

abstract = "We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U-Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 Ma for igneous emplacement and 431 ± 40 Ma for metamorphism. These anorthosites are petrologically and geochemically comparable with those of the Grenville province of Laurentia. Palaeogeographical reconstructions of Rodinia at 1.0-1.1 Ga suggest that the Sierras Pampeanas anorthosites were part of a large anorthosite province in the late Mesoproterozoic.",

keywords = "Anorthosites, Argentina, Neoproterozoic, Rodinia, SHRIMP data, Sierras Pampeanas",

author = "C. Casquet and Pankhurst, \{R. J.\} and Rapela, \{C. W.\} and C. Galindo and J. Dahlquist and E. Baldo and J. Saavedra and Casado, \{J. M.Gonz{\'a}lez\} and Fanning, \{C. M.\}",

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doi = "10.1144/0016-764904-100",

language = "English",

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TY - JOUR

T1 - Grenvillian massif-type anorthosites in the Sierras Pampeanas

AU - Casquet, C.

AU - Pankhurst, R. J.

AU - Rapela, C. W.

AU - Galindo, C.

AU - Dahlquist, J.

AU - Baldo, E.

AU - Saavedra, J.

AU - Casado, J. M.González

AU - Fanning, C. M.

PY - 2005/1

Y1 - 2005/1

N2 - We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U-Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 Ma for igneous emplacement and 431 ± 40 Ma for metamorphism. These anorthosites are petrologically and geochemically comparable with those of the Grenville province of Laurentia. Palaeogeographical reconstructions of Rodinia at 1.0-1.1 Ga suggest that the Sierras Pampeanas anorthosites were part of a large anorthosite province in the late Mesoproterozoic.

AB - We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U-Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 Ma for igneous emplacement and 431 ± 40 Ma for metamorphism. These anorthosites are petrologically and geochemically comparable with those of the Grenville province of Laurentia. Palaeogeographical reconstructions of Rodinia at 1.0-1.1 Ga suggest that the Sierras Pampeanas anorthosites were part of a large anorthosite province in the late Mesoproterozoic.

KW - Anorthosites

KW - Argentina

KW - Neoproterozoic

KW - Rodinia

KW - SHRIMP data

KW - Sierras Pampeanas

UR - https://www.scopus.com/pages/publications/13344268971

U2 - 10.1144/0016-764904-100

DO - 10.1144/0016-764904-100

M3 - Article

SN - 0016-7649

VL - 162

SP - 9

EP - 12

JO - Journal of the Geological Society

JF - Journal of the Geological Society

IS - 1

ER -

Grenvillian massif-type anorthosites in the Sierras Pampeanas

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