Neoproterozoic A-type magmatism in the Western Sierras Pampeanas (Argentina): Evidence for Rodinia break-up along a proto-lapetus rift?

E. Baldo; Casar Casquet; R. J. Pankhurst; C. Galindo; C. W. Rapela; C. M. Fanning; J. Dahlquist; J. Murra

doi:10.1111/j.1365-3121.2006.00703.x

Neoproterozoic A-type magmatism in the Western Sierras Pampeanas (Argentina): Evidence for Rodinia break-up along a proto-lapetus rift?

E. Baldo, Casar Casquet^*, R. J. Pankhurst, C. Galindo, C. W. Rapela, C. M. Fanning, J. Dahlquist, J. Murra

^*Corresponding author for this work

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

56 Citations (Scopus)

Abstract

A-type orthogneisses of mid Neoproterozoic age (774 ± 6Ma, U-Pb SHRIMP zircon age), are reported for the first time from the Grenvillian basement of the Western Sierras Pampeanas in Argentina. These anorogenic meta-igneous rocks represent the latest event of Rodinia break-up so far recognized in Grenvillian basement exposures across Andean South America. Moreover, they compare well with A-type granitoids and volcanic rocks along the Appalachian margin of Laurentia (Blue Ridge), thus adding to former evidence that the Western Sierras Pampeanas Grenvillian basement was left on the conjugate rifted margin of eastern Laurentia during Rodinia break-up and the consequent opening of the Iapetus ocean.

Original language	English
Pages (from-to)	388-394
Number of pages	7
Journal	Terra Nova
Volume	18
Issue number	6
DOIs	https://doi.org/10.1111/j.1365-3121.2006.00703.x
Publication status	Published - Dec 2006

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title = "Neoproterozoic A-type magmatism in the Western Sierras Pampeanas (Argentina): Evidence for Rodinia break-up along a proto-lapetus rift?",

abstract = "A-type orthogneisses of mid Neoproterozoic age (774 ± 6Ma, U-Pb SHRIMP zircon age), are reported for the first time from the Grenvillian basement of the Western Sierras Pampeanas in Argentina. These anorogenic meta-igneous rocks represent the latest event of Rodinia break-up so far recognized in Grenvillian basement exposures across Andean South America. Moreover, they compare well with A-type granitoids and volcanic rocks along the Appalachian margin of Laurentia (Blue Ridge), thus adding to former evidence that the Western Sierras Pampeanas Grenvillian basement was left on the conjugate rifted margin of eastern Laurentia during Rodinia break-up and the consequent opening of the Iapetus ocean.",

author = "E. Baldo and Casar Casquet and Pankhurst, {R. J.} and C. Galindo and Rapela, {C. W.} and Fanning, {C. M.} and J. Dahlquist and J. Murra",

year = "2006",

month = dec,

doi = "10.1111/j.1365-3121.2006.00703.x",

language = "English",

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journal = "Terra Nova",

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T1 - Neoproterozoic A-type magmatism in the Western Sierras Pampeanas (Argentina)

T2 - Evidence for Rodinia break-up along a proto-lapetus rift?

AU - Baldo, E.

AU - Casquet, Casar

AU - Pankhurst, R. J.

AU - Galindo, C.

AU - Rapela, C. W.

AU - Fanning, C. M.

AU - Dahlquist, J.

AU - Murra, J.

PY - 2006/12

Y1 - 2006/12

N2 - A-type orthogneisses of mid Neoproterozoic age (774 ± 6Ma, U-Pb SHRIMP zircon age), are reported for the first time from the Grenvillian basement of the Western Sierras Pampeanas in Argentina. These anorogenic meta-igneous rocks represent the latest event of Rodinia break-up so far recognized in Grenvillian basement exposures across Andean South America. Moreover, they compare well with A-type granitoids and volcanic rocks along the Appalachian margin of Laurentia (Blue Ridge), thus adding to former evidence that the Western Sierras Pampeanas Grenvillian basement was left on the conjugate rifted margin of eastern Laurentia during Rodinia break-up and the consequent opening of the Iapetus ocean.

AB - A-type orthogneisses of mid Neoproterozoic age (774 ± 6Ma, U-Pb SHRIMP zircon age), are reported for the first time from the Grenvillian basement of the Western Sierras Pampeanas in Argentina. These anorogenic meta-igneous rocks represent the latest event of Rodinia break-up so far recognized in Grenvillian basement exposures across Andean South America. Moreover, they compare well with A-type granitoids and volcanic rocks along the Appalachian margin of Laurentia (Blue Ridge), thus adding to former evidence that the Western Sierras Pampeanas Grenvillian basement was left on the conjugate rifted margin of eastern Laurentia during Rodinia break-up and the consequent opening of the Iapetus ocean.

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U2 - 10.1111/j.1365-3121.2006.00703.x

DO - 10.1111/j.1365-3121.2006.00703.x

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VL - 18

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JO - Terra Nova

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Neoproterozoic A-type magmatism in the Western Sierras Pampeanas (Argentina): Evidence for Rodinia break-up along a proto-lapetus rift?

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