Results 191 to 200 of about 152,765 (242)

Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina

Journal of South American Earth Sciences, 1994
Abstract A series of medium grade metamorphic rocks of the western sector of the Sierras Pampeanas Terrane in central western Argentina are represented by amphibolites, gneisses and schists derived from sedimentary as well as from igneous rocks. The metavolcanics consist of amphibolites, quartz-K-feldspar-muscovite schists, and hornblende-biotite and
G. Vujovich, H. Miller, V.A. Ramos
openaire   +1 more source

Transpressive deformation in the southwestern part of the Sierra de San Luis (Sierras Pampeanas, Argentina)

Journal of South American Earth Sciences, 1998
Abstract In the southwestern part of the Sierra de San Luis, clastic sediments of the Phyllite Group are assigned to the Late Precambrian–Early Cambrian interval and contain acid meta-mamatic dykes. Deposits of the Micaschist Group are interpreted as deeper crustal equivalents. Lower Ordovician intrusions of the Bemberg and Las Verbenas Tonalites, as
openaire   +1 more source

A combined zircon Hf isotope and whole-rock Nd and Sr isotopes study of Carboniferous A-type granites, Sierras Pampeanas of Argentina

Journal of South American Earth Sciences, 2020
We report new whole-rock Nd and Sr isotope data for two strongly peraluminous and one slightly peraluminous Carboniferous A-type granitic plutons in the eastern Sierras Pampeanas of Argentina.
J. Dahlquist, C. Galindo, Matías M. Morales Cámera, J. Moreno, P. Alasino, M. Basei, Marcos Simón Macchioli Grande   +6 more
semanticscholar   +1 more source

The metamorphic basement of the southern Sierra de Aconquija, Eastern Sierras Pampeanas

2017
The Eastern Sierras Pampeanas are mainly composed of Neoproterozoic-early Palaeozoic metamorphic complexes whose protoliths were sedimentary sequences deposited along the western margin of Gondwana. South of the Sierra de Aconquija, Eastern Sierras Pampeanas, a voluminous metamorphic complex crops out.
Eugenia Cisterna, Clara, Altenberger, Uwe (Dr.), Mon, Ricardo, Günter, Christina (Dr.), Gutierrez, Adolfo Antonio   +4 more
openaire   +1 more source

Mineralogy and Geochemistry of an Epithermal Manganese District, Sierras Pampeanas, Argentina

International Geology Review, 2004
The manganese mineralization studied in this paper represents the major concentration of this element in Argentina. It occurs in an area of 70 x 30 km, in the Sierras Pampeanas ranges, located in the provinces of Cordoba and Santiago del Estero. The analyzed area represents about 30% of the entire mineralized system.
openaire   +1 more source

Counterclockwise rotation during the Cenozoic in the northwestern end of the Sierras Pampeanas, Argentina

2022
Archive ouverte des sciences de la Terre et de l'espace Cette préimpression a été soumise et est à l'étude chez Tectonics. ESSOAr est un lieu de communication précoce ou de rétroaction avant l'examen par les pairs. Les données peuvent être préliminaires.En savoir plus sur les préimpressions préimpressionOuverture d'accèsVous consultez la dernière ...
Adolfo Antonio Gutiérrez, Ricardo Mon, Clara Eugenia Cisterna, Uwe Altenberger, Ahmad Arnous   +4 more
openaire   +1 more source

New geochronological and isotope data for the Las Chacras – Potrerillos and Renca batholiths: A contribution to the Middle-Upper Devonian magmatism in the pre-Andean foreland (Sierras Pampeanas, Argentina), SW Gondwana

Journal of South American Earth Sciences, 2019
The Las Chacras-Potrerillos together with the Renca batholith (Sierras de San Luis) are the largest Devonian igneous bodies in the Sierras Pampeanas after the Achala batholith (Sierra de Cordoba), all emplaced in the Devonian foreland region.
J. Dahlquist, Marcos Macchioli Grande, P. Alasino, M. Basei, C. Galindo, J. Moreno, Matías M. Morales Cámera   +6 more
semanticscholar   +1 more source

Depositional age and provenance in the San Luis Formation, Sierras Pampeanas, Argentina: Evidence from detrital zircon studies

Journal of South American Earth Sciences, 2019
The San Luis Formation is one of the lithostratigraphic units constituting the early Paleozoic crystalline basement of the Sierras de San Luis, which are part of the Sierras Pampeanas of central Argentina.
Juan M. Perón Orrillo, Ariel E. Ortiz Suárez, D. Rivarola, J. Otamendi, Augusto F. Morosini, R. Romero, M. Leisen, F. Barra   +7 more
semanticscholar   +1 more source

Ordovician submarine to subaerial volcanism along the western Gondwana margin: records of the Famatinian belt evolution, north-western Sierras Pampeanas, Argentina

International journal of earth sciences, 2022
C. Cisterna, B. Coira
semanticscholar   +1 more source

Orogenic magmatism, along the transition Precordillera-Sierras Pampeanas, between 29° and 31° S, Argentina

Journal of South American Earth Sciences, 2023
S. Poma, A. Ramos, V. Litvak, S. Quenardelle, E. Maisonnave, N. Rubinstein   +5 more
semanticscholar   +1 more source