Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts
A paleomagnetic study on nine samples from lavas from the Upper Cretaceous Tres Picos Prieto locality (43°50'S and 70°3'W), Patagonian Plateau Basaltic Province, revealed that a ca. 300 m thick pile of basalts accumulated during three discrete (i.e., temporally separated) volcanic episodes...
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2012
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| LEADER | 17690caa a22012017a 4500 | ||
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| 008 | 190411s2012 xx ||||fo|||| 00| 0 eng|d | ||
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| 100 | 1 | |a Zaffarana, C.B. | |
| 245 | 1 | 0 | |a Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts |
| 246 | 3 | 1 | |a Paleomagnetismo y geoquímica en la localidad de Tres Picos Prieto (43°S), Cretácico Superior, Basaltos de Plateau de Patagonia |
| 260 | |c 2012 | ||
| 270 | 1 | 0 | |m Zaffarana, C. B.; Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Intendente Güiraldes 2160, Capital Federal, Buenos Aires, Argentina; email: zaffarana@gl.fcen.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a A paleomagnetic study on nine samples from lavas from the Upper Cretaceous Tres Picos Prieto locality (43°50'S and 70°3'W), Patagonian Plateau Basaltic Province, revealed that a ca. 300 m thick pile of basalts accumulated during three discrete (i.e., temporally separated) volcanic episodes. The chemistry of these lavas shows characteristics compatible with both subduction and intraplate magmatism, with the former having a more important contribution in the younger lavas. Overall, we interpret these rocks to be transitional basalts generated in a supra-subduction environment. The Late Cretaceous to Cenozoic Patagonian Plateau Basaltic Province crops out from eastern Patagonia to the cordillera, and their genesis have been associated with different tectonic processes, even for spatially separated rocks of the same age. Considering that the development of the magmatic province is contemporary with the stage of westward drift of South America, we propose that magma generation and upwelling due to rapidly shearing asthenosphere inducing circulatory flow associated to asperities in the lithosphere-asthenosphere interface (shear-driven upwelling) can be evaluated as a further potential mechanism to account for many outcrops of these backarc to intraplate lavas. |l eng | |
| 593 | |a Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Intendente Güiraldes 2160, Capital Federal, Buenos Aires, Argentina | ||
| 593 | |a Servicio Geológico Minero Argentino (SEGEMAR), Av. Julio Argentino Roca 651, C1067ABB Capital Federal, Buenos Aires, Argentina | ||
| 593 | |a Instituto de Geociencias Básicas, Aplicadas y Ambientales (IGEBA), Ciudad Universitaria, Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET), Intendente Guiraldes 2160, Pabellon II (C1428EGA), Capital Federal, Buenos Aires, Argentina | ||
| 651 | 4 | |a ARGENTINA | |
| 651 | 4 | |a ARGENTINA | |
| 690 | 1 | 0 | |a GEOCHEMISTRY |
| 690 | 1 | 0 | |a LATE CRETACEOUS |
| 690 | 1 | 0 | |a PALEOMAGNETISM |
| 690 | 1 | 0 | |a PATAGONIAN PLATEAU BASALTIC PROVINCE |
| 690 | 1 | 0 | |a BASALT |
| 690 | 1 | 0 | |a CRETACEOUS |
| 690 | 1 | 0 | |a GEOACCUMULATION |
| 690 | 1 | 0 | |a GEOCHEMISTRY |
| 690 | 1 | 0 | |a INTRAPLATE PROCESS |
| 690 | 1 | 0 | |a LAVA |
| 690 | 1 | 0 | |a MAGMATISM |
| 690 | 1 | 0 | |a OUTCROP |
| 690 | 1 | 0 | |a PALEOMAGNETISM |
| 690 | 1 | 0 | |a SUBDUCTION ZONE |
| 690 | 1 | 0 | |a TECTONIC SETTING |
| 690 | 1 | 0 | |a PATAGONIA |
| 650 | 1 | 7 | |2 spines |a PETROGENESIS |
| 700 | 1 | |a Lagorio, S.L. | |
| 700 | 1 | |a Somoza, R. | |
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