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Mette Olivarius, Henrik Vosgerau, Lars Henrik Nielsen, Rikke Weibel, Sebastian N. Malkki, Benjamin D. Heredia and Tonny B. Thomsen
The significance of mineralogical maturity as a provenance indicator has long been debated and we use this study to demonstrate that it can indeed be a powerful tool to track the distribution of sandstone reservoirs. We investigate the cause of the prono...
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Marcia Munoz,Luis Aguirre,Mario Vergara,Alain Demant,Francisco Fuentes,Andres Fock
Pág. 54 - 77
In the El Volcán and Rodeo de los Bueyes areas, Andean Principal Cordillera (east of Santiago; 33º50'S), an Upper Oligocene-Lower Miocene volcanic series belonging to the Abanico Formation (Late Eocene-Early Miocene) is exposed. The rock successions outc...
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Mario Vergara,Beatriz Levi,Jan O. Nystrom,Eugenia Fonseca,Carlos Roeschmann
Pág. 295 - 302
ABSTRACT. Stratigraphic sequences of Lower Cretaceous age occur in two belts along central Chile. Between 30° and 35°S, the western belt, situated in the Coast Range is composed of 7-14 km thick intra-arc and forearc sequences dominated by shoshonitic to...
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Mario Vergara,Beatriz Levi,Jan O. Nystrom,Eugenia Fonseca,Carlos Roeschmann
Pág. 295 - 302
ABSTRACT. Stratigraphic sequences of Lower Cretaceous age occur in two belts along central Chile. Between 30° and 35°S, the western belt, situated in the Coast Range is composed of 7-14 km thick intra-arc and forearc sequences dominated by shoshonitic to...
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Maria E. Vattuone de Ponti,Carlos O. Latorre
Pág. 187 - 200
RESUMEN. Rocas volcanicas de edad paleocena-eocena que corresponden a la Formacion Ventana, en las cercanias de San Martin de los Andes, han sufrido metamorfismo regional de muy bajo grado con facies de ceolita, prehnita, pumpellyita y transicional a esq...
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Maria E. Vattuone de Ponti,Carlos O. Latorre
Pág. 187 - 200
RESUMEN. Rocas volcanicas de edad paleocena-eocena que corresponden a la Formacion Ventana, en las cercanias de San Martin de los Andes, han sufrido metamorfismo regional de muy bajo grado con facies de ceolita, prehnita, pumpellyita y transicional a esq...
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Elodie Muller, Magali Ader, Giovanni Aloisi, Cédric Bougeault, Christophe Durlet, Emmanuelle Vennin, Karim Benzerara, Eric C. Gaucher, Aurélien Virgone, Marco Chavez, Pierre Souquet and Emmanuelle Gérard
Interpreting the paleoecosystems of ancient microbialites relies on our understanding of how modern microbialites form in relation with the bio-physico-chemical conditions of their environment. In this study, we investigated the formation of modern carbo...
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Béatrice A. Ledésert and Ronan L. Hébert
The Upper Rhine Graben (URG) hosts thermal anomalies that account for the development of oil fields. Recently, a geothermal power plant has been installed in this area. Data obtained in this framework provide an insight into the temperature distribution ...
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Alberto Bolla, Paolo Paronuzzi, Daniela Pinto, Davide Lenaz and Marco Del Fabbro
The 1963 Vajont landslide is a reference example of large rockslides involving clay interbeds emplaced in sedimentary rock masses in correspondence with the basal rupture zone (thinly stratified cherty limestone of the Fonzaso Formation dated to Middle?U...
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Gabriele Cruciani, Marcello Franceschelli, Hans-Joachim Massonne, Giovanni Musumeci and Massimo Scodina
A complex system of mono- and polymineralic centimeter-thick veins occurs within the ultrabasic amphibolites of Montigiu Nieddu hill in northeastern Sardinia, and they are filled with garnet, amphibole, chlorite, and epidote. Some garnet-rich veins are m...
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Ricardo Sureda,Raul Lira,Fernando Colombo
Pág. 141 - 160
Bi-Pb-Ag-Te oxides, sulfides and sulfosalts are relatively uncommon accessory minerals in the scheelite-bearing skarn of the La Falda Metamorphic Complex (Late Precambrian-Cambrian) of the Los Guindos mining group, Pampa de Olaen, Córdoba province, Argen...
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Daniela Welkner,Estanislao Godoy,Heinz-J Bernhardt
Pág. 3 - 15
The Late Cretaceous Del Salto Pluton is one of the four Late Jurassic to Late Miocene intrusives that are recognized ca. 60 km inboard from the eastern limit of the Patagonian Batholith, close to the Chilean-Argentinian border. The pluton is a fluorite-b...
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Adam G. Szulc, Andrew C. Morton, Andrew G. Whitham, Sidney R. Hemming and Stuart N. Thomson
The crystalline basement and Caledonian orogenic belt of East Greenland between 70 and 78° N are divided into five source regions on the basis of heavy mineral assemblages, mineral geochemistry, and isotopic age data from 42 modern moraine/outwash sample...
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Daniel Sellés,A. Carolina Rodriguez,Michael A. Dungan,Jose A. Naranjo,Moyra Gardeweg
Pág. 293 - 316
The Quaternary Nevado de Longaví volcano of the Andean Southern Volcanic Zone (SVZ) has erupted magmas that range in composition from basalt to low-silica dacite, although andesites are the dominant erupted magma type. Amphibole is a common phenocryst ph...
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María Josefina Pons,Juan Mendiberri,Martín Arce,Gerson Alan Greco,Telma B. Musso,María Lis Fernández,Natalia Hauser,Pamela Aparicio González
Pág. 93 - 126
The Sofía-Julia-Valencia vein system, located in the Andacollo mining district in central west Argentina, is hosted by ENE-WSW oriented strike-slip faults which are the result of reactivation of normal faults affecting Carboniferous to Jurassic rocks dur...
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Norbert Clauer, Edward Keppens, I. Tonguç Uysal and Amélie Aubert
A combined ultrasonic treatment, with de-ionized H2O, dilute HAc or dilute HCl, of three Mid-Miocene glauconite samples was applied to K?Ar date the different separates in order to compare the results with those obtained by the Rb?Sr method using the sam...
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Abdallah Atef, Adel A. Surour, Ahmed A. Madani and Mokhles K. Azer
Since Antiquity, sustainable resources of gold and copper have been mined at two prominent prospects in the north Eastern Desert of Egypt, namely the south Gabel Um Monqul (SGUM) and Gabal Al Kharaza (GKZ). Mineralization is hosted by Neoproterozoic shie...
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Cunfei Ma, Xianxu Fang, Xiaonan Ma, Xiantai Liu, Bingkun Xu and Xinmin Ge
By combining thermal simulation experiments with core data, thin sections, scanning electron microscopy (SEM), source rock, and high-pressure mercury and gas adsorption analysis, this paper evaluates the properties and models of shale reservoirs in the u...
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Elizabeth J. Catlos, Chandra S. Dubey and Thomas M. Etzel
The Sikkim region of the Himalayas (NE India) may form an important microplate between Nepal and Bhutan. Here we report high-resolution pressure-temperature (P-T) paths taken from garnet-bearing rocks across the northern and eastern portion of the region...
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Tuija Vähäkuopus, Tommi Kauppila, Jari Mäkinen, Antti E. K. Ojala and Samu E. Valpola
Human land-use activities, especially in the peatlands, are under consideration as the mitigation and lowering of CO2 emissions from land-use practices is needed to address climate change. In Finland, approximately one third of the land surface is covere...
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