A history of Proterozoic terranes in southern South America: From Rodinia to Gondwana

被引：76

作者：

Casquet, C. ^{[1
]}

Rapela, C. W. ^{[2
]}

Pankhurst, R. J. ^{[3
]}

Baldo, E. G. ^{[4
]}

Galindo, C. ^{[1
]}

Fanning, C. M. ^{[5
]}

Dahlquist, J. A. ^{[4
]}

Saavedra, J. ^{[6
]}

机构：

[1] Univ Complutense, CSIC, IGEO, Dept Petrol & Geoquim, E-28040 Madrid, Spain

[2] CONICET UNLP, Ctr Invest Geol, RA-1900 La Plata, Buenos Aires, Argentina

[3] British Geol Survey, Nottingham NG12 5GG, England

[4] CONICET UNC, CICTERRA, RA-5000 Cordoba, Argentina

[5] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia

[6] CSIC, Inst Agrobiol & Recursos Nat, Salamanca 37071, Spain

来源：

GEOSCIENCE FRONTIERS | 2012年 / 3卷 / 02期

关键词：

Paleoproterozoic; Cratons; Grenvillian; Neoproterozoic rifting; SW Gondwana assembly;

D O I：

10.1016/j.gsf.2011.11.004

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The role played by Paleoproterozoic cratons in southern South America from the Mesoproterozoic to the Early Cambrian is reconsidered here. This period involved protracted continental amalgamation that led to formation of the supercontinent Rodinia, followed by Neoproterozoic continental break-up, with the consequent opening of Clymene and Iapetus oceans, and finally continental re-assembly as Gondwana through complex oblique collisions in the Late Neoproterozoic to Early Cambrian. The evidence for this is based mainly on a combination of precise U-Pb SHRMP dating and radiogenic isotope data for igneous and metamorphic rocks from a large area extending from the Rio de la Plata craton in the east to the Argentine Precordillera in the west and as far north as Arequipa in Peru. Our interpretation of the paleogeographical and geodynamic evolution invokes a hypothetical Paleoproterozoic block (MARA) embracing basement ultimately older than 1.7 Ga in the Western Sierras Pampeanas (Argentina), the Arequipa block (Peru), the Rio Apa block (Brazil), and probably also the Paraguaia block (Bolivia). (C) 2011, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

引用

页码：137 / 145

页数：9

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