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Vasiliy Sukhorukov, Valeriya Volkova, Peter Nevolko and Pavel Kozlov
Metamorphic processes play a key role in forming orogenic gold deposits. In this paper, we present new evidence that host schists of the two largest gold deposits of the Yenisey ridge (Russia) Olympiada and Eldorado underwent a single stage of metamorphi...
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Reinhard Werner, Boris Baranov, Kaj Hoernle, Paul van den Bogaard, Folkmar Hauff and Igor Tararin
Here we present the first radiometric age and geochemical (major and trace element and isotope) data for samples from the Hydrographer Ridge, a back arc volcano of the Kurile Island Arc, and a newly discovered chain of volcanoes (?Sonne Volcanoes?) on th...
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Robert B. Watts,Jorge Clavero Ribes,R. Stephen J. Sparks
Pág. 558 - 588
Guallatiri Volcano (18°25?S, 69°05?W) is a large edifice located on the Chilean Altiplano near the Bolivia/Chile border. This Pleistocene-Holocene construct, situated at the southern end of the Nevados de Quimsachata chain, is an andesitic/dacitic comple...
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Yves Lagabrielle,Bruno Scalabrino,Manuel Suarez,Jean-Francoise Ritz
Pág. 276 - 299
Patagonia is well known for spectacular occurrences of a variety of glacial-derived landforms and deposits and for a long history of ancient glaciations. In this paper, we frrst review the diverse evidence that demonstrates the development of glacial-rel...
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Marcelo Garcia,Gerard Herail
Pág. 127 - 130
presented new and important geochronologic data on the Cenozoic magmatic rocks of northern Chile, and proposed magmatic and tectonic interpretations for them. Here we comment on one of their interpretations about the Miocene tectonic evolution of the Pre...
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Gerard Wörner,Hartmut Seyfried
Pág. 131 - 137
Reply to the Comment by M. García and G. Hérail on 'Geochronology (Ar-Ar, K-Ar and He-exposure ages) of Cenozoic magmatic rocks from northern Chile (18-22°S): implications for magmatism and tectonic evolution of the central Andes' by Wörner et al. (2000)
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Gerhard Wörner,Konrad Hammerschmidt,Friedhelm Henjes-Kunst,Judith Lezaun,Hans Wilke
Pág. 205 - 240
K-Ar and Ar/Ar ages from magmatic rocks of northern Chile (18-22°S) describe duration and extent of the Tertiary and Quaternary magmatic evolution and date major tectonic events in northernmost Chile. This paper summarizes new K-Ar and Ar-Ar mineral and ...
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Mario Vergara,Diego Morata,Rosemary Hickey-Vargas,Leopoldo Lopez-Escobar,Ingrid Beccar
Pág. 23 - 41
Upper Eocene to Middle Miocene volcanic rocks are found in the Colbún area, Linares Precordillera, central Chile (35º35'-36ºS). Based on stratigraphic characteristics, K-Ar and Ar-Ar dating, two different units are recognized: 1-a Lower Unit (Upper Eocen...
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Larry G. Marshall,Patricia Salinas
Pág. 57 - 87
RESUMEN. El area tipo de la Formacion Rio Frias se ubica a lo largo del rio Cisnes, Aisen, sur de Chile (44°34-39'S; 71 °13-15'W). Se reconocen dos unidades litologicas en esta formacion. La unidad inferior (ca. 131 m), caracterizada por la presencia de ...
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