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Autor Dahlquist, Juan A. |
Documentos disponibles escritos por este autor (42)
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Dahlquist, Juan A. ; Alasino, Pablo H. ; Galindo Francisco, Mª del Carmen | Sociedad Geológica de España | 2005Comparative compositional studies between two peraluminous unit with magmatic andalucite and cordierite indicate that they were produced by partial melting of two differents metasedimentary source rocks. We conclude that geochemical studies from[...]![]()
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Casquet, César ; Pankhurst, R.J. ; Rapela, Carlos W. ; Galindo Francisco, Mª del Carmen ; Dahlquist, Juan A. ; Baldo, Edgardo G. ; Saavedra, Julio ; González Casado, José Manuel ; Fanning, C.M. | Geological Society of London. | 2004-01We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U–Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 [...]![]()
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Dahlquist, Juan A. ; Pankhurst, R.J. ; Gaschnig, Richard M. ; Pankhurst, R.J. ; Rapela, Carlos W. ; Casquet, César ; Alasino, Pablo H. ; Galindo Francisco, Mª del Carmen ; Baldo, Edgardo G. | Elsevier Science B. V., Amsterdam | 2013Wereport the first study integrating in situ U–Pb and Hf isotope data frommagmatic zircon andwhole-rock Sm–Nd isotope data for granitic rocks of the Sierras Pampeanas, Argentina, in order to evaluate the Palaeozoic growth of the proto-Andean mar[...]![]()
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Casquet, César ; Rapela, Carlos W. ; Pankhurst, R.J. ; Baldo, Edgardo G. ; Galindo Francisco, Mª del Carmen ; Fanning, C.M. ; Dahlquist, Juan A. ; Saavedra, Julio | Elsevier B.V. | 2012The role played by Paleoproterozoic cratons in southern South America from the Mesoproterozoic to the Early Cambrian is reconsidered here. This period involved protracted continental amalgamation that led to formation of the supercontinent Rodin[...]![]()
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Rapela, Carlos W. ; Verdecchia, Sebastián O. ; Casquet, César ; Pankhurst, Robert J. ; Baldo, Edgardo G. ; Galindo Francisco, Mª del Carmen ; Murra, Juán A. ; Dahlquist, Juan A. ; Fanning, C. Mark | Elsevier | 2016-04The provenance of Neoproterozoic to Early Paleozoic sedimentary rocks in the Sierras Pampeanas has beenestablished using U–Pb SHRIMP age determination of detrital zircons in twelve metasedimentary samples,with supplementary Hf and O isotope anal[...]![]()
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Rapela, Carlos W. ; Casquet, César ; Baldo, Edgardo G. ; Dahlquist, Juan A. ; Pankhurst, R.J. ; Galindo Francisco, Mª del Carmen ; Saavedra, Julio | Universidad Complutense de Madrid | 2001El margen proto-andino de Gondwana ha sido el escenario de al menos dos orogénesis desde el desmembramiento del supercontinente Rodinia al final del Neoprotrozoico, hasta el reagrupamiento de las masas continentales en Pangea al final del Carbon[...]![]()
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Ramacciotti, Carlos ; Casquet, César ; Baldo, Edgardo G. ; Alasino, Pablo H. ; Galindo Francisco, Mª del Carmen ; Dahlquist, Juan A. | Cambridge University Press | 2020-02The Sierra de Pie de Palo, in the Argentinean Sierras Pampeanas (Andean foreland), consists of a Mesoproterozoic basement and an Ediacaran – upper Cambrian sedimentary cover that underwent folding, thrusting and metamorphism during the Ordovicia[...]![]()
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Dahlquist, Juan A. ; Galindo Francisco, Mª del Carmen ; Pankhurst, R.J. ; Rapela, Carlos W. ; Alasino, Pablo H. ; Saavedra, Julio ; Fanning, C.M. | Elsevier Science B.V., Amsterdam | 1995Garnet is an uncommon accessory mineral in igneous rocks but is petrologically significant. The Peñón Rosado granite (469± 4Ma) at Cerro Asperecito is an S-type granite that contains an unusual amount of magmatic garnet. Combined petrology, chem[...]![]()
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Baldo, Edgardo G. ; Casquet, César ; Pankhurst, R.J. ; Galindo Francisco, Mª del Carmen ; Rapela, Carlos W. ; Fanning, C.M. ; Dahlquist, Juan A. ; Murra, Juan Alberto | Blackwell Publishing Ltd | 2006A-type orthogneisses of mid Neoproterozoic age (774 ± 6 Ma, U-Pb SHRIMP zircon age), are reported for the first time from the Grenvillian basement of the Western Sierras Pampeanas in Argentina. These anorogenic meta-igneous rocks represent the l[...]![]()
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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[...]![]()
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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[...]![]()
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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[...]![]()
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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[...]![]()
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