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Abstract
Chapter from: M
62:Petroleum Basins of South America
Edited by
A. J. Tankard, R. Suarez Soruco, and H. J. Welsink
Authors:
A. J. Tankard, M. A. Ultiana, H. J. Welsink, V. A. Ramos,
M. Turic, A. B. Franca. E. J. Milani, B. B. de Brito Neves, N. Eyles, J.
Skarmeta, H. Santa Ana, F. Wiens, M. Cirbian, O. Lopez P., G. J. B. De
Wit, T. Machacha, and R. McG. Miller Basin and Aerial Analysis/Evaluation
Published 1995 as
part of Memoir 62
Copyright © 1995 The American Association of Petroleum
Geologists. All Rights Reserved. |
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Structural
and Tectonic Controls of Basin Evolution in Southwestern Gondwana During
the Phanerozoic
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A. J. Tankard
Tankard Enterprises
Calgary, Alberta, Canada
M. A. Uliana
ASTRA
Buenos Aires, Argentina
H. J. Welsink
Perez Companc
Neuquén, Argentina
V. A. Ramos
Universidad de Buenos
Aires
Buenos Aires, Argentina
M. Turic
YPF
Buenos Aires, Argentina
A. B. França
E. J. Milani
Petrobras/Nexpar
Curitiba, Brazil
B. B. de Brito Neves
Universidade de S. Paulo
São Paulo, Brazil
N. Eyles
Department of Geology
University of Toronto
Scarborough, Ontario,
Canada
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J. Skarmeta
ENAP
Santiago, Chile
H. Santa Ana
ANCAP
Montevideo, Uruguay
F. Wiens
Geo Consultores
Asunción, Paraguay
M. Cirbián
O. López Paulsen
YPFB
Santa Cruz, Bolivia
G. J. B. Germs
JCI Research Unit
Randfontein, South Africa
M. J. De Wit
University of Cape Town
Rondebosch, South Africa
T. Machacha
Geological Survey Department
Lobatse, Botswana
R. McG. Miller
NAMCOR
Windhoek, Namibia
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Abstract
The continental
lithosphere of southwestern Gondwana, comprising the southern part of South
America and southern Africa, was largely assembled before the end of the
Proterozoic. Geologic studies indicate that the basement anisotropy that
controlled the development of Phanerozoic basins was established by Neoproterozoic-Early
Cambrian tectonism. This tectonism reactivated the older terrane boundaries
or cut across them. The backbone linking the system of Pan-African and
Brasiliano basins was a system of northeast-trending structures. There
were four areas of pronounced Neoproterozoic-Early Cambrian basin subsidence
in the study area: the Chiquitanas trough in Bolivia, the Puncoviscana
basin in Argentina, the Dom Feliciano-Ribeira basins in Brazil, and the
Damara-Nama basin complex of southern Africa.
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