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Autor Dahlquist, Juan A. |
Documentos disponibles escritos por este autor (42)
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Dahlquist, Juan A. ; Pankhurst, R.J. ; Rapela, Carlos W. ; Galindo Francisco, Mª del Carmen ; Alasino, Pablo H. ; Fanning, C.M. ; Saavedra, Julio ; Baldo, Edgardo G. | Instituto de Ciencias de la Tierra "Jaume Almera" (Barcelona) | 2008New SHRIMP U-Pb zircon ages are reported for igneous and sedimentary rocks of the Famatina Complex, constraining the age of the magmatism and the ensialic basins. Together with whole-rock and isotope geochemistry for the igneous rocks from the c[...]texto impreso
Alasino, Pablo H. ; Casquet, César ; Galindo Francisco, Mª del Carmen ; Pankhurst, R.J. ; Rapela, Carlos W. ; Dahlquist, Juan A. ; Recio, C. ; Baldo, Edgardo G. ; Larrovere, Mariano Alexis ; Ramacciotti, Carlos | Cambridge University Press | 2020We report a study of whole-rock O–H–Sr–Nd isotopes of Ordovician igneous and metamorphic rocks exposed at different crustal palaeodepths along c. 750 km in the Sierras Pampeanas, NW Argentina. The isotope compositions preserved in the intermedia[...]texto impreso
Alasino, Pablo H. ; Dahlquist, Juan A. ; Galindo Francisco, Mª del Carmen ; Casquet, César | Asociación Geológica Argentina. Buenos Aires | 2006Estudios combinados de petrología, química mineral y geoquímcia de roca total revelan la presencia de dos unidades graníticas peraluminosas con minerales aluminosos magmáticos tales como granate y mica blanca y la presencia distintiva de turmali[...]texto impreso
Rapela, Carlos W. ; Pankhurst, Robert J. ; Casquet, César ; Dahlquist, Juan A. ; Fanning, C. Mark ; Baldo, Edgardo G. ; Galindo Francisco, Mª del Carmen ; Alasino, Pablo H. ; Ramacciotti, Carlos D. ; Verdecchia, Sebastián O. ; Murra, Juán A. ; Basei, Miguel A.S. | Elsevier | 2018-12Along the proto-Pacific margin of Gondwana, from Venezuela to northeastern Patagonia, the Early–Middle Ordovician Famatinian orogeny was the first orogenic event following assembly of the supercontinent. Previous isotope studies of the igneous a[...]texto impreso
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Murra, Juan Alberto ; Baldo, Edgardo G. ; Galindo Francisco, Mª del Carmen ; Casquet, César ; Pankhurst, R.J. ; Rapela, Carlos W. ; Dahlquist, Juan A. | Instituto de Ciencias de la Tierra "Jaume Almera" (Barcelona) | 2011The Sierra Brava Complex on the eastern flank of the Sierra de Ancasti consists of marbles, metabasites, calc-silicate rocks, psammo-pelitic schists and gneisses. In the central part of this sierra a thick succession of banded schists (Ancasti F[...]texto impreso
Alasino, Pablo H. ; Casquet, César ; Larrovere, M.A. ; Pankhurst, R.J. ; Galindo Francisco, Mª del Carmen ; Dahlquist, Juan A. ; Baldo, Edgardo G. ; Rapela, Carlos W. | Elsevier Science B.V., Amsterdam | 2014A sheeted tonalite complex at Cerro Toro in western Sierra de Famatina, Argentina, was emplaced in the middle crust during an early phase of the Ordovician Famatinian orogeny. The intrusion produced a large-scale thermal aureole that provoked si[...]texto impreso
Casquet, César ; Alasino, Pablo H. ; Galindo Francisco, Mª del Carmen ; Dahlquist, Juan A. ; Baldo, Edgardo G. ; Ramacciotti, Carlos ; Verdecchia, Sebastián ; Larrovere, Mariano Alexis ; Rapela, Carlos W. ; Recio, C. | Springer | 2021The Famatinian is a segment of the Ordovician Terra Australis accretionary orogen that stretched along the SW Margin of Gondwana from Australia to Colombia. The present knowledge of this orogenic segment still is incomplete. We present geochemis[...]texto impreso
Casquet, César ; Hervé, F. ; Pankhurst, R.J. ; Baldo, Edgardo G. ; Calderón, M. ; Fanning, C.M. ; Rapela, Carlos W. ; Dahlquist, Juan A. | Elsevier | 2014The Mejillonia terrane, named after the Mejillones Peninsula (northern Chile), has been traditionally considered an early Paleozoic block of metamorphic and igneous rocks displaced along the northern Andean margin in the Mesozoic. However, U–Pb [...]texto impreso
Casquet, César ; Pankhurst, R.J. ; Rapela, Carlos W. ; Galindo Francisco, Mª del Carmen ; Fanning, C.M. ; Chiaradia, Massimo ; Baldo, Edgardo G. ; González Casado, José Manuel ; Dahlquist, Juan A. | Elsevier Science B. V., Amsterdam | 2008The rocks of Sierra de Maz and Sierra del Espinal (Western Sierras Pampeanas) represent pre-Famatinian (Ordovician) basement. Isotope compositions (Nd and Pb) of metasedimentary rocks and SHRIMP U–Pb dating of detrital zircons, combined with oth[...]texto impreso
Rapela, Carlos W. ; Pankhurst, R.J. ; Casquet, César ; Fanning, C.M. ; Baldo, Edgardo G. ; González Casado, José Manuel ; Galindo Francisco, Mª del Carmen ; Dahlquist, Juan A. | Elsevier Science B.V., Amsterdam | 2007The extent and nature of the Archaean–Palaeoproterozoic craton of Río de la Plata of southern South America, a major but poorly understood crustal component in Neoproterozoic plate reconstructions, as well as the depositional, metamorphic and ma[...]texto impreso
Dahlquist, Juan A. ; Pankhurst, R.J. ; Rapela, Carlos W. ; Casquet, César ; Fanning, C.M. ; Alasino, Pablo H. ; Baez, Miguel | Elsevier Science B.V., Amsterdam. | 2006New 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[...]texto impreso
Morales Cámera, Matías M. ; Dahlquist, Juan A. ; Ramacciotti, Carlos D. ; Galindo Francisco, Mª del Carmen ; Basei, Miguel A.S. ; Zandomeni, Priscila S. ; Macchioli Grande, Marcos | Elsevier | 2018-12The largest igneous body in the Sierras Pampeanas (the Achala batholith) is composed by several magmatic intrusions. How many plutons form this batholith and its intrusive history remains unclear. The emplacement of the batholith began at ca. 38[...]texto impreso
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Rapela, Carlos W. ; Pankhurst, R.J. ; Casquet, César ; Baldo, Edgardo G. ; Galindo Francisco, Mª del Carmen ; Fanning, C.M. ; Dahlquist, Juan A. | Elsevier Science B.V., Amsterdam. | 2010New U–Pb SHRIMP zircon ages combined with geochemical and isotope investigation in the Sierra de Maz and Sierra de Pie de Palo and a xenolith of the Precordillera basement (Ullún), provides insight into the identification of major Grenville-age [...]texto impreso
Colombo, F. ; Baldo, Edgardo G. ; Casquet, César ; Pankhurst, R.J. ; Galindo Francisco, Mª del Carmen ; Rapela, Carlos W. ; Dahlquist, Juan A. ; Fanning, C.M. | Elsevier Science B.V., Amsterdam | 2009Two orthogneisses have been recognized in the sierras of Espinal and Maz (Western Sierras Pampeanas, NW Argentina) that were emplaced within a Grenvillian metasedimentary sequence. Microcline, plagioclase and quartz are the main rock-forming min[...]texto impreso
Casquet, César ; Pankhurst, R.J. ; Fanning, C.M. ; Baldo, Edgardo G. ; Galindo Francisco, Mª del Carmen ; Rapela, Carlos W. ; González Casado, José Manuel ; Dahlquist, Juan A. | Elsevier Science B. V., Amsterdam | 2006Metamorphism of Grenvillian age (ca. 1.2 Ga; U–Pb zircon dating) is recognized for the first time in the Western Sierras Pampeanas (Sierra de Maz). Conditions reached granulite facies (ca. 780 °C and ca. 780 MPa). Comparing geochronological and [...]