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Juan A. Dahlquist,Matías M. Morales Cámera,Juan A. Moreno,Miguel A.S. Basei,Priscila Zandomeni,Gilmara Santos da Cruz
Pág. 167 - 180
Previous geochronological data indicate a protracted Devonian magmatic activity developed in the Sierra de San Luis, Sierras Pampeanas of Argentina, with three major crystallization events: 393±3, 384±2, and 377±2 Ma. Previously reported whole-rock Sm-Nd...
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Eduard Ziganshin, Danis Nourgaliev, Irina Bayuk, Rail Kadyrov and Thanh Hung Nguyen
Carbonate rocks have a wide variety of pore shapes and different types of grains, which greatly affect the elastic properties and characteristics of the reservoir. This causes certain difficulties in petroelastic modeling. One of the problems is the scal...
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Michael A. Pointon, Helen Smyth, Jenny E. Omma, Andrew C. Morton, Simon Schneider, Peter Hülse, Stephen J. Rippington, Berta Lopez-Mir, Quentin G. Crowley, Ian Millar, Martin J. Whitehouse, Dirk Frei, Robert A. Scott and Michael J. Flowerdew
A multi-proxy provenance study of Late Carboniferous to Middle Jurassic sandstones from the eastern Sverdrup Basin was undertaken employing optical petrography and heavy mineral analysis, chemical analysis of apatite, garnet and rutile grains, as well as...
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Xu Lin, Marc Jolivet, Jing Liu-Zeng, Feng Cheng, Zhonghai Wu, Yuntao Tian, Lingling Li and Jixin Chen
Understanding the formation of the North Qilian Shan in the NE Tibetan Plateau provides insights into the growth mechanisms of the northern region of the plateau across time. Detrital zircon fission-track (ZFT) analyses of river sediments can provide a c...
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Samanta Serra-Varela,Pablo D. González,Raúl E. Giacosa,Nemesio Heredia,David Pedreira,Fidel Martín-González,Ana María Sato
Pág. 102 - 130
In San Martín de los Andes area (Argentinian Patagonia) the Palaeozoic basement consists of metamorphic and plutonic rocks. The metamorphic rocks include strongly deformed schists, gneisses and migmatites. Their geochemical and petrographic characteristi...
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Gustavo G. Voldman,Juan L. Alonso,Luis P. Fernández,Gladys Ortega,Guillermo L. Albanesi,Aldo L. Banchig,Raúl Cardó
Pág. 399 - 409
The Rinconada Formation is a mélange that crops out in the eastern margin of the Argentine Precordillera, an exotic terrane accreted to Gondwana in Ordovician times. Its gravity-driven deposits have been studied by means of conodont and graptolite biostr...
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Nemesio Heredia,Pedro Farias,Joaquín García-Sansegundo,Laura Giambiagi
Pág. 242 - 257
The Andean Paleozoic basement of the Cordón del Plata (Argentina) consists of two sets of rocks showingdifferent stratigraphy, structure and metamorphism. The lower one is represented by the pre-Carboniferous (Devonian?)Vallecitos beds. These rocks have ...
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Mercedes di Pasquo
Pág. 97 - 138
Two associations of palynomorphs recovered from eight samples from Los Monos Formation (late Eifelian-early Frasnian), cropping out at Balapuca, located at the Bolivian margin of the Bermejo River in the San Telmo range, are characterized. In the Tarija ...
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Hans Niemeyer,Felipe Urzua,Claudia Rubinstein
Pág. 25 - 43
RESUMEN. El estudio detallado de seis columnas estratigraficas en el lugar-tipo de la Formacion Zorritas, en Sierra Almeida, alta cordillera de Antofagasta, permite dividir esta sucesion en tres miembros. El Miembro Inferior consiste en cuarzoarenitas co...
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Sofia Rebolledo,Reynaldo Charrier
Pág. 55 - 69
RESUMEN. Las unidades paleozoicas que afloran en la costa de Chile central son: el Complejo Metamorfico del Choapa (CMC) y las formaciores Puerto Manso y Huentelauquen. El CMC, cuyo protolito consistio en grauwacas, arcosas y basaltos oceanicos, esta con...
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