Paleomagnetic evidence of an early Paleozoic rotated terrane in Northwest Argentina; a clue for Gondwana-Laurentia interaction?

Paleomagnetic results from three Lower Ordovician units in northwest Argentina are reported. When assessed with available geologic evidence, these data permit the definition of the Puna Oriental-Famatina rotated terrane. Paleogeographic reconstructions based on these paleomagnetic results place Puna...

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Bibliographic Details
Published in:Geology (Boulder) 1996-10, Vol.24 (10), p.953-956
Main Authors: Conti, C. M, Rapalini, A. E, Coira, B, Koukharsky, M
Format: Article
Language:English
Subjects:
Argentina
Catamarca Argentina
continental drift
Geology
Gondwana
IGCP
La Rioja Argentina
Laurentia
Lower Ordovician
lower Paleozoic
Magnetism
Ordovician
paleogeography
paleomagnetism
Paleontology
Paleozoic
Puna
rotation
South America
Stratigraphy
terranes
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Summary:Paleomagnetic results from three Lower Ordovician units in northwest Argentina are reported. When assessed with available geologic evidence, these data permit the definition of the Puna Oriental-Famatina rotated terrane. Paleogeographic reconstructions based on these paleomagnetic results place Puna Oriental-Famatina in the South Iapetus ocean, close to the Gondwana margin and near some of the Lower-Middle Ordovician Central Mobile belt terranes of the Northern Appalachians. The accretion of Puna Oriental-Famatina may have resulted from the closure of this ocean in Middle Ordovician time.
ISSN:0091-7613
1943-2682
DOI:10.1130/0091-7613(1996)024<0953:PEOAEP>2.3.CO;2