Results 151 to 160 of about 1,303 (189)

Quaternary intraplate deformation in the southeastern Sierras Pampeanas, Argentina

Journal of Seismology, 2001
Neogene strain from the subducting Nazca plate is widely distributed in theAndean foreland as a result of flat-lying subduction beneath central westernArgentina (28°–33°S latitude). This fact is indicated byuplifted basement blocks bounded by reverse faults as far as 600 kms eastof the Chilean trench axis.
Carlos H. Costa, M. Victoria Murillo, Guillermo L. Sagripanti, Carlos E. Gardini   +3 more
openaire   +1 more source

Post-orogenic, Carboniferous granite-hosted Sn–W mineralization in the Sierras Pampeanas Orogen, Northwestern Argentina [PDF]

Ore Geology Reviews, 2012
The Sierras Pampeanas orogen, in northwestern Argentina, hosts significant Sn-W mineralization in a variety of mostly epizonal granite stocks emplaced in variably metamorphosed country rocks.
Fogliata, Ana Silvia, Hagemann, S. G., Sardi, Fernando Guillermo, Báez, Miguel Adolfo, Santos, O.   +4 more
exaly   +2 more sources

Palaeolandsurfaces and neotectonic analysis in the southern Sierras Pampeanas, Argentina

Geological Society, London, Special Publications, 1999
Abstract The Sierras Pampeanas of northwestern Argentina are ranges underlain by crystalline basement rocks bounded on their western margins by N-S trending reverse faults along which uplift took place during the Andean orogeny. A pre-uplift regional erosion surface is commonly preserved on the eastern slopes which have been tilted in most ...
Carlos H. Costa, Aldo D. Giaccardi, Emilio F. González Díaz   +2 more
openaire   +1 more source

Is the exhumation of the Sierras Pampeanas only related to Neogene flat-slab subduction? Implications from a multi-thermochronological approach

Journal of South American Earth Sciences, 2013
This paper presents new thermochronological data and reviews a set of recently published data for the Sierras Pampeanas in central and northwestern Argentina, which constitutes a distinct morphotectonic feature between 27 degrees S and 33 degrees S ...
Stefan Löbens, István Dunkl, Klaus Wemmer   +2 more
exaly   +2 more sources

Paleozoic deformation in the Sierras de Cordoba and Sierra de Las Minas, eastern Sierras Pampeanas, Argentina

Journal of South American Earth Sciences, 2003
Basement orthogneisses, paragneisses, and migmatites in the Sierras de Cordoba of the eastern Sierras Pampeanas of central Argentina represent remnants of a Cambrian arc and accretionary prism that initially formed above a subduction zone along the early Cambrian margin of Gondwana.
Carol Simpson, Richard D. Law, L.Peter Gromet, Roberto Miro, C.J. Northrup   +4 more
openaire   +1 more source

Geodynamic evolution of the Eastern Sierras Pampeanas (Central Argentina) based on geochemical, Sm–Nd, Pb–Pb and SHRIMP data [PDF]

International Journal of Earth Sciences, 2010
Whole-rock geochemical analyses using major and trace elements in combination with the Sm–Nd and Pb–Pb isotope systems, together with SHRIMP age dating on metasedimentary rocks from the Sierras de Chepes, the Sierras de Córdoba, the Sierra Norte and the ...
André Steenken, Klaus Wemmer, Robert Frei   +2 more
exaly   +2 more sources

Late Holocene faulting in the southeast Sierras Pampeanas of Argentina

Geology, 1996
The seismic history of extra-Andean South America is poorly documented. Between lat 26°S and 33°S, about 375 km east of the fold-and-thrust belt that marks the present orogenic front, the block-faulted crystalline basement uplifts of the Sierras Pampeanas in Argentina reveal extensive Quaternary reverse faulting. 14C dates of 1080 ± 70 and 1310 ± 40 yr
Carlos H. Costa, Claudio Vita Finzi
openaire   +1 more source

Sandstone Geomorphology: Cerro Colorado, Sierras Pampeanas, Córdoba, Argentina

2021
The Cerro Colorado Cultural and Natural Reserve, Cordoba, Argentina, is well known for its impressive rock paintings on sandstone formations. While previous research in the area has focused mainly on archaeological sites, this study describes the surface geology and focuses on the diversity and possible origins of the regional sandstone landforms. This
Gabriella M. Boretto, Marcela Cioccale, Claudio Carignano, Sandra Gordillo, Andrea Recalde, Luis Tissera   +5 more
openaire   +1 more source

Thermochronometric data on the development of the basement peneplain in the Sierras Pampeanas, Argentina

Journal of South American Earth Sciences, 1989
In the Sierras Pampeanas geomorphic province of central Argentina there are regions where exposed crystalline basement has had no sedimentary cover older than Neogene strata, and other areas where upper Paleozoic and Mesozoic strata overlie the basement.
T.E. Jordan, P. Zeitler, V. Ramos, A.J.W. Gleadow   +3 more
openaire   +1 more source

Granitoids of the Tafi Megafracture (Sierras Pampeanas, Argentina): Petrogenetic implications

Journal of South American Earth Sciences, 1989
Abstract A group of small Ordovician-Silurian plutons was emplaced in the Tafi Megafracture of the Sierras Pampeanas, Argentina. These granites, with some peraluminous features, vary from types with andesine, biotite, magmatic epidote, and sometimes sphene, to other muscovitic types with albite and sometimes garnet (almandine-spessartite), reflecting
A.J. Toselli, J.N. Rossi de Toselli, J. Saavedra, E. Pellitero   +3 more
openaire   +1 more source