Geochemistry of the Mamil Choique granitoids at Rio Chico, Río Negro, Argentina: Late Paleozoic crustal melting in the North Patagonian Massif
The Mamil Choique granitoids located in the SW border of the North Patagonian Massif consist of three peraluminous units: the banded Huenchuquil tonalites and granodiorites (HTG) and the Cerro Mojón biotite-muscovite monzogranites (CMG), which are intruded by the Nahuelfil monzogranites (NG). Accord...
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| Lenguaje: | Inglés |
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2008
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 04532caa a22005657a 4500 | ||
|---|---|---|---|
| 001 | PAPER-5891 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203534.0 | ||
| 008 | 190411s2008 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-44349145509 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a López de Luchi, M.G. | |
| 245 | 1 | 0 | |a Geochemistry of the Mamil Choique granitoids at Rio Chico, Río Negro, Argentina: Late Paleozoic crustal melting in the North Patagonian Massif |
| 260 | |c 2008 | ||
| 270 | 1 | 0 | |m López de Luchi, M.G.; INGEIS, CONICET, Instituto de Geocronología y Geología Isotópica, Pabellón INGEIS, C1428EHA Buenos Aires, Argentina; email: deluchi@ingeis.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a The Mamil Choique granitoids located in the SW border of the North Patagonian Massif consist of three peraluminous units: the banded Huenchuquil tonalites and granodiorites (HTG) and the Cerro Mojón biotite-muscovite monzogranites (CMG), which are intruded by the Nahuelfil monzogranites (NG). According to their major and trace element relations, as well as a comparison with experimentally produced melts, HTG are compatible with partial melting of mafic source rocks at variable H2O contents; residual garnet is suggested by HREE depletion that indicates a minimum P of 9-10 kbar during melting. The CMG would have formed from partial melting of supracrustal fertile lithologies (biotite-bearing) in the presence of H2O-bearing volatile phase that resulted in Sr-rich, moderately depressed HREE melts, likely produced within the garnet stability field (7-10 kbar). The intrusive NG display distinct geochemical signatures (low Sr, no HREE depletion) and general major element ratios akin to the experimentally produced melt at low P (≈5 kbar). Regional constraints indicate that coeval HTG and CMG emplacement took place along a decompressing path slightly postdating the climax of regional metamorphism in the host Cushamen Formation. Later NG intrusion would have occurred at upper crustal levels. © 2007 Elsevier Ltd. All rights reserved. |l eng | |
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas | ||
| 536 | |a Detalles de la financiación: This research was funded by PIP0445/98 from the Consejo Nacional de Investigaciones Cientificas y Técnicas. We appreciate thoughtful reviews by A. Patiño Douce and J. Otamendi, which helped us improve the quality of the manuscript. Fruitful discussions with H. Ostera, A. Rapalini, and L. Dalla Salda are greatly appreciated. We are also in debt to Dr. V. Ramos for his editorial suggestions. Technical support of the INGEIS is especially noted. G. Giordanengo made the final version of the illustrations. | ||
| 593 | |a INGEIS, CONICET, Instituto de Geocronología y Geología Isotópica, Pabellón INGEIS, C1428EHA Buenos Aires, Argentina | ||
| 593 | |a CONICET, Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, C1428EHA Buenos Aires, C1428EHA Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a GEOCHEMISTRY |
| 690 | 1 | 0 | |a MAMIL CHOIQUE GRANITOIDS |
| 690 | 1 | 0 | |a NORTH PATAGONIAN MASSIF |
| 690 | 1 | 0 | |a PARTIAL MELTING |
| 690 | 1 | 0 | |a UPPER PALEOZOIC |
| 690 | 1 | 0 | |a EMPLACEMENT |
| 690 | 1 | 0 | |a GRANITOID |
| 690 | 1 | 0 | |a GRANODIORITE |
| 690 | 1 | 0 | |a IGNEOUS GEOCHEMISTRY |
| 690 | 1 | 0 | |a IGNEOUS INTRUSION |
| 690 | 1 | 0 | |a PALEOZOIC |
| 690 | 1 | 0 | |a PARTIAL MELTING |
| 690 | 1 | 0 | |a SOURCE ROCK |
| 690 | 1 | 0 | |a TONALITE |
| 690 | 1 | 0 | |a TRACE ELEMENT |
| 690 | 1 | 0 | |a PATAGONIA |
| 651 | 4 | |a ARGENTINA | |
| 651 | 4 | |a RIO NEGRO [ARGENTINA] | |
| 651 | 4 | |a SOUTH AMERICA | |
| 700 | 1 | |a Cerredo, M.E. | |
| 773 | 0 | |d 2008 |g v. 25 |h pp. 526-546 |k n. 4 |p J. South Am. Earth Sci. |x 08959811 |w (AR-BaUEN)CENRE-1080 |t Journal of South American Earth Sciences | |
| 856 | 4 | 1 | |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-44349145509&doi=10.1016%2fj.jsames.2007.05.004&partnerID=40&md5=6c64a919d9975563ca3ba26d3f1cc2f6 |y Registro en Scopus |
| 856 | 4 | 0 | |u https://doi.org/10.1016/j.jsames.2007.05.004 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_08959811_v25_n4_p526_LopezdeLuchi |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v25_n4_p526_LopezdeLuchi |y Registro en la Biblioteca Digital |
| 961 | |a paper_08959811_v25_n4_p526_LopezdeLuchi |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 963 | |a VARI | ||
| 999 | |c 66844 | ||