10.6084/m9.figshare.3453650.v1
R. J. Pankhurst
R. J.
Pankhurst
C. W. Rapela
C. W.
Rapela
M. G. López De Luchi
M. G. López
De Luchi
A. E. Rapalini
A. E.
Rapalini
C. M. Fanning
C. M.
Fanning
C. Galindo
C.
Galindo
The Gondwana connections of northern Patagonia
Geological Society of London
2016
O isotopes
parautochthonous origin
Gondwana connections
North Patagonian Massif
Nd isotopes
Ordovician granites
area west
Palaeozoic times
trace element geochemistry
Famatinian orogenic belts
Permian age
Central Transantarctic Mountains
multidisciplinary study
Cambrian age
ion microprobe geochronology
granitoid samples
ocean closure
Sierras Pampeanas
Geology
2016-06-21 11:34:48
Dataset
https://geolsoc.figshare.com/articles/dataset/The_Gondwana_connections_of_northern_Patagonia/3453650
<p>A multidisciplinary study (U–Pb sensitive high-resolution ion microprobe geochronology, Hf and O isotopes in zircon, Sr and
Nd isotopes in whole-rocks, as well as major and trace element geochemistry) has been carried out on granitoid samples from
the area west of Valcheta, North Patagonian Massif, Argentina. These confirm the Cambrian age of the Tardugno Granodiorite
(528 ± 4 Ma) and the Late Permian age of granites in the central part of the Yaminué complex (250 Ma). Together with petrological
and structural information for the area, we consider a previously suggested idea that the Cambrian and Ordovician granites
of northeastern Patagonia represent continuation of the Pampean and Famatinian orogenic belts of the Sierras Pampeanas, respectively.
Our interpretation does not support the hypothesis that Patagonia was accreted in Late Palaeozoic times as a far-travelled
terrane, originating in the Central Transantarctic Mountains, and the arguments for and against this idea are reviewed. A
parautochthonous origin is preferred with no major ocean closure between the North Patagonian Massif and the Sierra de la
Ventana fold belt.
</p>