Results 51 to 60 of about 214 (158)

Late Holocene Dust Deposition Fluxes Over the Entire South Atlantic Ocean

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 1, January 2024.
Abstract Mineral dust accumulated on the ocean floor is an important archive for reconstructing past atmospheric circulation changes and climatological conditions in the source areas. Dust emitted from Southern Hemisphere dust sources is widely deposited over the oceans. However, there are few records of dust deposition over the open ocean, and a large
Michèlle van der Does, Frank Lamy, Stephan Krätschmer, Jan‐Berend W. Stuut, Christoph Völker, Martin Werner, Roseanne Schwarz, Marty Fleisher, Gisela Winckler   +8 more
wiley   +1 more source

The San Blas Pluton: An example of Carboniferous plutonism in the Sierras Pampeanas, Argentina [PDF]

Journal of South American Earth Sciences, 2006
New geochronological and geochemical data are reported for the San Blas Pluton (SBP), in the northwestern Sierra de Velasco, Sierras Pampeanas, which intrudes Ordovician granitoids developed during the Famatinian orogeny. A precise Carboniferous age of 340±3 Ma is established by U–Pb dating of zircon using a sensitive high-resolution ion microprobe ...
Dahlquist, Juan Andrés, Pankhurst, Robert J., Rapela, Carlos Washington, Casquet, César, Fanning, Christopher, Alasino, Pablo H., Báez, Miguel Adolfo   +6 more
openaire   +5 more sources

Estudios geoarqueológicos de fuentes y canteras líticas de las Sierras Pampeanas y llanuras adyacentes

Revista del Museo de Antropologia, 2020
El material lítico es el elemento de mayor abundancia en los registros arqueológicos de Sierras Centrales y sus llanuras adyacentes. Los estudios realizados sobre el mismo utilizan diferentes escalas espaciales, metodologías de campo y laboratorio.
Guillermo Heider, Ariel Ortiz Suarez, Diego Rivero, Edgardo Baldo, Sebastián Pastor, Gabriel Ramos, Mariangeles Borgo, Raúl Gil, Jorge Chiesa, Carlos Costa, Andrea Recalde, Rafael Curtoni, Julieta Capriolo, Lucas Muñoz   +13 more
doaj   +1 more source

Time constraints on the tectonic evolution of the Eastern Sierras Pampeanas (Central Argentina) [PDF]

International Journal of Earth Sciences, 2009
The application of the SHRIMP U/Pb dating technique to zircon and monazite of different rock types of the Sierras de Córdoba provides an important insight into the metamorphic history of the basement domains. Additional constraints on the Pampean metamorphic episode were gained by Pb/Pb stepwise leaching (PbSL) experiments on two titanite and garnet ...
Siegesmund, Siegfried, Steenken, A, Martino, R D, Wemmer, K, Lopez de Luchi, M G, Frei, Robert, Presnyakov, S, Guereschi, A   +7 more
openaire   +5 more sources

Macroinvertebrados de ríos serranos semiáridos de San Luis (Argentina): base para la evaluación ecológica

Acta Zoológica Lilloana
Los sistemas fluviales de regiones áridas y semiáridas están sometidos a estrés hídrico debido a la variabilidad de precipitaciones, eventos extremos y presión antrópica.
Cynthia Ortiz, Cesar Almeida, Daniel A. Dos Santos, Mariana B. Jofré   +3 more
doaj   +1 more source

Caracterización petrográfica y geoquímica del batolito Cerro Aspero-Alpa Corral (32°34'-32°42' LS y 64°43'-64°52' LO), provincia de Córdoba, Argentina

Estudios Geologicos, 1992
El batolito Cerro Aspero-Alpa Corral (CA-AC) es un cuerpo granítico que aflora en el extremo sur de las Sierras Pampeanas Orientales, en la provincia de Córdoba, República Argentina, cubriendo una superficie cercana a los 440 km2. Es un cuerpo intrusivo
G. Porta
doaj   +1 more source

Geochemical constraints on the petrogenesis of the Paleozoic granitoids of the Sierra de San Luis, Sierras Pampeanas, Argentina

Journal of South American Earth Sciences, 2007
Abstract The Paleozoic granitoids of the Sierra de San Luis comprise the Ordovician tonalite suite (OTS; metaluminous to mildly peraluminous calcic tonalite–granodiorites) and granodiorite–granite suite (OGGS; peraluminous calcic to calc-alkaline granodiorite–monzogranites), as well as the Devonian granite suite (DGS; peraluminous alkali-calcic ...
de Luchi, M., Siegesmund, S., Wemmer, K., Steenken, A., Naumann, R.   +4 more
openaire   +4 more sources

Geomorphology of Tafi valley (Tucumán Province, Northwest Argentina)

Journal of Maps, 2019
Tafí valley is an elongated tectonic basin of about 450 km2 located in NW Argentina in a mountainous frame of metamorphic and granitic Precambrian-Paleozoic rocks belonging to Sierras Pampeanas. This study presents the first detailed geomorphological map
María Marta Sampietro-Vattuone, José Luis Peña-Monné   +1 more
doaj   +1 more source

Los granitos peraluminosos de las Sierras de Vinquis, Cerro Negro y Zapata (Sierras Pampeanas), provincia de Catamarca, Argentina

Estudios Geologicos, 1992
A grandes rasgos, los plutones estudiados tienen semejanzas con otros del entorno regional, tal como los de la Sierra de Mazán, pero con peculiaridades mineralógicas.
G. A. Toselli, J. Saavedra, G. Córdoba, M. E. Medina   +3 more
doaj   +1 more source

Structural and morphotectonic evolution of the Sierras Pampeanas (Argentina) constrained by a multithermochronometer approach

, 2022
Die Sierras Pampeanas in Zentral- und Nordwestargentinien stellen ein ausgeprägtes morphotektonisches Merkmal im Bereich der flach subduzierenden Nazca Platte unter die Südamerikanische Platte zwischen ~27° S und ~33° S dar. Diese flache Subduktion wurde bisher als Ursache für die Heraushebung und Deformation von Höhenzügen innerhalb der Sierras ...
Löbens, Stefan, Siegesmund, Siegfried, Siegesmund, Siegfried, Georg-August-Universität Göttingen, Siegesmund, Siegfried, Sobel, Edward R.   +5 more
openaire   +2 more sources