Results 1 to 10 of about 1,303 (189)

Grenvillian massif-type anorthosites in the Sierras Pampeanas [PDF]

Journal of the Geological Society, 2005
We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U–Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 Ma for igneous emplacement and 431 ± 40 Ma for metamorphism.
Casquet, Cesar, Pankhurst, Robert J, Rapela, Carlos W, Galindo, Carmen, Dahlquist, Juan A., Baldo, Edgardo, Saavedra, J, Gonzalez-Casado, Jose M, Fanning, Christopher   +8 more
core   +10 more sources

Piedmont deposits as seismic energy dissipators, Sierras Pampeanas of Argentina [PDF]

SN Applied Sciences, 2021
This study shows the neotectonic deformation occurred in the southern piedmont of the Cumbres Calchaquíes, in the Amaicha and Tafí valleys. Neotectonic deformation manifests itself through faults, folds and diversions of drainage channels.
Adolfo Antonio Gutiérrez, Ricardo Mon, Ahmad Arnous, Rodolfo Germán Aranda-Viana   +3 more
doaj   +3 more sources

Circular Natural Geoforms, Sierras Pampeanas, Argentina [PDF]

Open Journal of Geology, 2017
We describe two circular morphological features representing depressed areas. This preliminary work is based on visual interpretations from Landsat ETM satellite images and SRTM Radar scans. The two geoforms are located at the north of the Sierras Pampeanas in Argentina. The La Cienaga circular indentation is 15 km in diameter and Las Cejas is 34 km in
Gutierrez, Adolfo Antonio, Mon, Ricardo, Cisterna, Clara Eugenia   +2 more
openaire   +4 more sources

Composición química de granitos batolíticos de las sierras pampeanas

Revista del Museo de La Plata
Se describe en esta contribución la metodología químico-analítica y los resultados obtenidos mediante la misma a los efectos de la determinación de elementos mayoritarios y trazas en cuerpos graníticos mayores de las Sierras Pampeanas.
Carlos W. Rapela, Larry Heaman
doaj   +3 more sources

Refined exhumation history of the northern Sierras Pampeanas, Argentina [PDF]

Tectonics, 2013
AbstractThe Sierra de Aconquija and Cumbres Calchaquíes in the thick‐skinned northern Sierras Pampeanas, NW Argentina present an ideal setting to investigate the tectonically and erosionally controlled exhumation and uplift history of mountain ranges using thermochronological methods. Although these ranges are located along strike of one another, their
Stefan Löbens, Edward R Sobel, Klaus Wemmer   +2 more
exaly   +3 more sources

Tourmalinites from the Eastern Sierras Pampeanas, Argentina

Ore Geology Reviews, 2004
Abstract In the eastern Sierras Pampeanas, Central Argentina, tourmalinites and coticules are found in close association with stratabound scheelite deposits in metamorphic terranes. In Sierra Grande (Agua de Ramon and Ambul districts) and Sierra de Altautina, tourmalinites are associated with stratabound scheelite deposits related to ...
S.M. Tourn, C.J. Herrmann, S. Ametrano, M.K. de Brodtkorb   +3 more
exaly   +2 more sources

A-type magmatism in the sierras of Maz and Espinal: A new record of Rodinia break-up in the Western Sierras Pampeanas of Argentina [PDF]

Precambrian Research, 2009
Two orthogneisses have been recognized in the sierras of Espinal and Maz (Western Sierras Pampeanas, NW Argentina) that were emplaced within a Grenvillian metasedimentary sequence. Microcline, plagioclase and quartz are the main rock-forming minerals, with accessory zircon, apatite-(CaF), magnetite, biotite (Fe/(Fe + Mg) = 0.88–0.91 ...
Edgardo G Baldo, C Casquet, Carmen Galindo   +2 more
exaly   +8 more sources

Active deformation in the northern Sierra de Valle Fértil, Sierras Pampeanas, Argentina [PDF]

Journal of South American Earth Sciences, 2015
Fil: Ortiz, Gustavo Federico. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico San Juan.
Ortiz, Gustavo Federico, Alvarado, Patricia Monica, Fosdick, Julie C., Perucca, Laura Patricia A., Saez, Mauro, Venerdini, Agostina Lia   +5 more
openaire   +2 more sources

Aportes metodológicos para el estudio de la tecnología lítica tallada en cuarzo (Argentina)

Arqueologia, 2022
El cuarzo fue una de las materias primas más utilizada para la manufactura de instrumentos líticos a través del tiempo y del espacio. Sin embargo, su gran dureza, la presencia de planos de fractura y otras imperfecciones causaron que no haya sido ...
Enrique Alejandro Moreno, Gisela Sario, Erico Gaál, Débora Egea, Ignacio Gerola, Camila Brizuela, Juan Montegú   +6 more
doaj   +1 more source

The Difunta Correa metasedimentary sequence (NW Argentina): relict of a Neoproterozoic platform? — elemental and Sr-Nd isotope evidence

Revista Mexicana de Ciencias Geológicas, 2018
The Sierra de Pie de Palo (Western Sierras Pampeanas, Argentina) in the Andean foreland is mainly formed by a Mesoproterozoic basement and an Ediacaran metasedimentary cover referred to as the Difunta Correa metasedimentary sequence.
Carlos Ramacciotti, César Casquet, Edgardo Baldo, Carmen Galindo   +3 more
doaj   +1 more source