Navegar

Colección

Datos Estadísticas

Artículo

La versión final de este artículo es de uso interno. El editor solo permite incluir en el repositorio el artículo en su versión post-print. Por favor, si usted la posee enviela a
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The Valle del Cura region is characterized by a thick volcanic and volcaniclastic sequence that records the Tertiary arc and backarc magmatic evolution of the Argentine Main Cordillera over the modern Pampean flatslab at 29.5-30°S. During the Eocene, a retroarc basin developed, represented by the Valle del Cura Formation synorogenic volcanosedimentary sequence, which includes rhyolites and dacitic tuffs. These silicic volcanic rocks have weak arc chemical signatures and high lithophile element concentrations and are isotopically enriched relative to the late Oligocene-early Miocene volcanic rocks that followed them. Their chemical characteristics fit with eruption through a thin crust. The Valle de Cura Formation was followed by the Oligocene-early Miocene Doña Ana Group volcanic sequence, which erupted at and near the arc front west of the border with Chile. The Doña Ana Group volcanic rocks have calc-alkaline chemical characteristics consistent with parental magmas forming in a mantle wedge and erupting through a normal thickness crust (35 km). Subsequent shallowing of the downgoing Nazca plate caused the volcanic front to migrate eastward. The volcanic sequences of the middle Miocene Cerro de las Tórtolas Formation erupted at this new arc front, essentially at the Argentine border. Two stages are recognized: an older one (16-14 Ma) in which magmas appear to have erupted through a normal thickness crust (30-35 km) and a younger one (13-10 Ma) in which the steeper REE pattern suggests the magmas last equilibrated with higher pressure residual mineral assemblages in a thicker crust. Isotopic ratios in the younger group are consistent with an increase in original crustal components and crust introduced into the mantle source by forearc subduction erosion. A peak in forearc subduction erosion near 12-10 Ma is consistent with when the main part of the Juan Fernandez Ridge began to subduct beneath the region. In addition to late Miocene Tambo Formation dacitic ignimbrites, the younger Cerro de las Tórtolas Formation volcanic rocks erupted at the height of contractional deformation in the Valle del Cura and to the east. The last important volcanic sequence to erupt in the Valle del Cura is the late Miocene Vacas Heladas Ignimbrite, the most isotopically enriched Tertiary magmas in the Valle del Cura that contain the highest proportion of crustal components. Subsequently volcanism ceased in the region in response to shallowing of the subduction zone. © 2007 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Paleogene and Neogene magmatism in the Valle del Cura region: New perspective on the evolution of the Pampean flat slab, San Juan province, Argentina
Autor:Litvak, V.D.; Poma, S.; Kay, S.M.
Filiación:Consejo Nacional de Investigaciones Científicas y Técnicas, Departamento de Ciencias Geológicas-Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellon II-, C1428EHA, Argentina
Department of Earth and Atmospheric Sciences, INSTOC, Cornell University, Ithaca, NY 14853, United States
Palabras clave:Geochemistry; Geoquímica; Neogene; Neogeno; Paleogene; Paleogeno; Valle del Cura; Volcanism; Volcanismo; basin evolution; chemical property; igneous geochemistry; magma; magmatism; Neogene; Paleogene; subduction zone; volcanic rock; volcanism; Argentina; San Juan [Argentina]; Sierras Pampeanas; South America; Valle del Cura; Cura
Año:2007
Volumen:24
Número:2-4
Página de inicio:117
Página de fin:137
DOI: http://dx.doi.org/10.1016/j.jsames.2007.04.002
Título revista:Journal of South American Earth Sciences
Título revista abreviado:J. South Am. Earth Sci.
ISSN:08959811
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v24_n2-4_p117_Litvak

Referencias:

  • Bissig, T., Clark, A.H., Lee, J.K.W., Heather, K.B., The cenozoic history of volcanism and hydrothermal alteration in the Central Andean flat-slab region: New 40Ar-39Ar constrains from the El Indio-Pascua Au(-Ag, Cu) belt, 29°20-30°30″S (2001) International Geology Review, 43, pp. 312-340
  • Bissig, T., Clark, A.H., Lee, J.K.W., Cerro de Vidrio ryholitic dome: evidence for late Pliocene in the Central Andean flan-slab region, Lama-Veladero district, 29°20′, San Juan Province, Argentina (2002) Journal of South American Earth Science, 15, pp. 571-576
  • Bissig, T., Clark, A.H., Lee, J.K.W., von Quadt, A., Petrogenetic and metallogenetic responses to Miocene slab flattenig: new constrains from the El Indio-Pascua Au-Ag-Cu Belt, Chile/Argentina (2003) Mineralium Deposita, 38, pp. 844-862
  • Charrier, R., Baeza, O., Elgueta, S., Flynn, J.J., Gans, P., Kay, S.M., Muñoz, N., Zurita, E., Evidence for Cenozoic extensional basin development and tectonic inversion south of the flat-slab segment, southern Central Andes, Chile (33-36°S. L.) (2002) Journal of South American Earth Sciences, (15), pp. 117-139
  • Gill, J.B., (1981) Orogenic Andesites and Plate Tectonics, , Springer-Verlag, Berlin Heidelberg New York p. 392
  • Drummond, M.S., Defant, M.J., A model for trondjemite-tonalite-dacite genesis and crustal growth via slab melting: Archean to modern comparisons (1990) Journal of Geophysical Research, 95, pp. 21503-21521
  • Godoy, E., Yañez, G., Vera, E., Inversion of an Oligocene volcano-tectonic basin and uplift of its superimposed Mioceno magmatic arc in the Chilean Central Andes: first seismic and gravity evidences (1999) Tectonophysics, 306, pp. 217-236
  • Gutscher, M.A., Maury, R., Eissen, J.P., Bourdon, E., Can slab melting be caused by flat subduction? (2000) Geology, 28, pp. 535-538
  • Hickey, R.L., Frey, F.A., Gerlach, D.C., López Escobar, L., Multiple sources for basaltic arc rocks from the Southern Volcanic Zone of the Andes (34-41°S): trace elements and isotopic evidence for contributions from subducted oceanic crust, mantle and continental crust (1986) Journal of Geophysical Research, 91, pp. 5963-5983
  • Hildreth, W., Moorbath, S., Crustal contributions to arc magmatism in the Andes of Central Chile (1988) Contributions to Mineralogy and Petrology, 98, pp. 455-489
  • Irvine, T.N., Baragar, W.R.A., A guide to the chemical classification of the common volcanic rocks (1971) Canadian Journal of Earth Sciences, 8, pp. 523-548
  • Kay, R.W., Geochemical constrains on the origin of Aleutian magmas (1977) Islands arcs, deep sea trenches and back-arcs basins, 1, pp. 229-242. , Talwani M., and Pitman W.C. (Eds), AGU Ewing Ser
  • Kay, R.W., Aleutian magnesian andesite: melts from subducted Pacific ocean crust (1978) Journal of Volcanological and Geothermal Research, 4, pp. 497-522
  • Kay, S.M., Abruzzi, J.M., Magmatic evidence for Neogene lithospheric evolution of the Central Andes "flat slab" between 30°S and 32°S (1996) Tectonophysics, 259, pp. 15-28
  • Kay, S.M., Gordillo, C.E., Pocho volcanic rocks and the melting of depleted continental lithosphere above a shallowly dipping subduction zone in the Central Andes (1994) Contributions to Mineralogy and Petrology, 117, pp. 25-44
  • Kay, S.M., Mpodozis, C., Central Andean ore deposits linked to evolving shallow subduction systems and thickening Crust (2001) GSAToday, 11, pp. 4-9
  • Kay, S.M., Mpodozis, C., Magmatism as a probe to Neogene shalowing of the Nazca plate beneath the modern Chilean flta-slab (2002) Journal of South American Earth Science, 15, pp. 39-57
  • Kay, S.M., Godoy, E., Kurtz, A., Episodic arc migration, crustal thickening, subduction erosion and magmatism in the South-Central Andes (2005) Geology Society of American Bulletin, 117, pp. 67-88
  • Kay, S.M., Ramos, V.A., Márquez, M., Evidence in Cerro Pampa volcanic rocks for slab-melting prior to ridge-trench collision in southern South America (1993) Journal of Geology, 101, pp. 703-714
  • Kay, S.M., Maksaev, V.A., Moscoso, R., Mpodozis, C., Nasi, C., Probing the evolving Andean lithosphere: Mid-late Tertiary Magmatism in Chile (29°-30°30′S) over the modern zone of subhorizontal subduction (1987) Journal of Geophysical Research, 92, pp. 6173-6189
  • Kay, S.M., Maksaev, V.A., Moscoso, R., Mpodozis, C., Nasi, C., Gordillo, C.E., Tertiary Andean Magmatism in Chile and Argentina between 28°S and 33°S: Correlation of magmatic chemistry with changing Benioff zone (1988) Journal South American Geology Earth Sciences, 1, pp. 21-38
  • Kurtz, A., Kay, S.M., Charrier, R., Farrar, E., Geochronology of Miocene plutons and exhumation history of the El Teniente region, Central Chile (34-35° L.S.) (1997) Revista Geológica de Chile, 24, pp. 75-90
  • Le Maitre, R.W., Bateman, P., Dudek, A., Keller, J., Lameyre, M.J., Le Bas, P.A., Sabine, R., Wooley Zanettin, B., (1989) A classification of igneous rocks and glossary of terms, , Blackwell, Oxford p. 193
  • Limarino, C.O., Fauqué, L.A., Cardó, R., Gagliardo, M.L., Escosteguy, L., La Faja volcánica miocena de la Precordillera septentrional. Revista de la Asociación Geológica Argentina (2002) Revista de la Asociación Geológica Argentina, 57, pp. 289-304
  • Limarino, C.O., Gutiérrez, P.R., Malizia, D., Barreda, V., Page, S., Ostera, H., Linares, E., Edad de las secuencias paleógenas y neógenas de las cordilleras de la Brea y Zancarrón, Valle del Cura, San Juan (1999) Revista de la Asociación Geológica Argentina, 54, pp. 177-181
  • Litvak, V.D., Page, S., Nueva evidencia cronológica en el Valle del Cura, provincia de San Juan (2002) Revista de la Asociación Geológica Argentina, 57, pp. 483-486
  • Litvak, V.D., Poma, S., Estratigrafía y facies volcánicas y volcaniclásticas de la Formación Valle del Cura: magmatismo paleógeno en la Cordillera Frontal de San Juan (2005) Revista de la Asociación Geológica Argentina, 60 (2), pp. 402-416
  • Litvak, V.D., Chernicoff, C.J., Poma, S., Localización de centros eruptivos mediante aeromagnetometría en el sector central del Valle del Cura, San Juan, Argentina: implicancias para la evolución de arco/retroarco Cenozoico (2005) Revista Geológica de Chile, 32, pp. 77-93
  • Litvak, V.D., Kay, S.M., Mpodozis, C., New K/Ar ages on Tertiay volcanic rocks in the Valle del Cura, Pampean flat slab segment, Argentina (2005) Actas XVI Congreso Geológico Argentino, (2), pp. 159-164
  • Litvak, V.D., Poma, S., Limarino, C.O., Volcanismo piroclástico de edad eocena media en el Valle del Cura, provincia de San Juan: nuevos datos geológicos y geocronológicos (2004) Revista de la Asociación Geológica Argentina, 59, pp. 514-517
  • Maksaev, V., Moscoso, R., Mpodozis, C., Nasi, C., Las unidades volcánicas y plutónicas del Cenozoico superior entre la Alta Cordillera del Norte Chico (29°-31 °S), Geología, alteración hidrotermal y mineralización (1984) Revista Geológica de Chile, 21, pp. 11-51
  • Martin, M.W., Clavero, J.R., Mpodozis, C.M., Late Paleozoic to Early Jurassic tectonic development of the high Andean Principal Cordillera, El Indio Region, Chile (29°-30°S) (1999) Journal of South American Earth Sciences, 12, pp. 33-49
  • Pardo Casas, F., Molnar, P., Relative motion of the Nazca (Farallón) and South America plates since Late Cretaceous time (1987) Tectonics, 6, pp. 233-248
  • Pilger, R.H., Plate reconstructions, aseismic ridges, and low angle subduction beneath the Andes (1981) Geological Society of America Bulletin, 92, pp. 448-456
  • Pilger, R.H., Cenozoic plate kinematics, subduction and magmatism: South American Andes (1984) Journal of the Geological Society of London, 141, pp. 793-802
  • Ramos, V.R., Kay, S.M., Singer, B.S., Las adakitas de la Cordillera Patagónica: nuevas evidencias geoquímicas y geocronológicas (2004) Revista de la Asociación Geológica Argentina, 59 (4), pp. 693-706
  • Ramos, V.A., Kay, S.M., Page, R., Munizaga, F., La Ignimbrita Vacas Heladas y el cese del volcanismo en el Valle del Cura, provincia de San Juan (1989) Revista de la Asociación Geológica Argentina, 44, pp. 336-352
  • Ramos, V.A., Page, R., Kay, S.M., Lapido, O., Delpino, D., Geología de la región del volcán Tórtolas, Valle del Cura, provincia de San Juan. Actas 10° Congreso Geológico Argentino y Simposium Circumpacific Phanerozoic Granites (1987) Tucumán, 4, pp. 260-263
  • Richards, J.P., Discussion on "Giant versus small porphyry copper deposits of Cenozopic age in northern Chile: Adakitic versus normal calc-alkaline magmatism" by Oyarzun et al (2002) Mineralium Deposita, 37, pp. 788-790
  • Rollinson, H.R., (1993) Using Geochemical Data: Evaluation, presentation, interpretation, , Longman Scientific & Technical, Longman Group UK Ltd p. 352
  • Stern, C.R., Skewes, M.A., Miocene to present evolution at the northern end of the Andean Southern Volcanic Zone, central Chile (1995) Revista Geológica de Chile, 22, pp. 261-272
  • Skewes, M.A., Arévalo, A., Floody, R., Zuñiga, H., Stern, C.R., The giant El Teniente breccia deposit: hypogene copper distribution and emplacement (2002) Society of Economic Geologists Special Publication, 9, pp. 299-332
  • Vergés, J., Ramos, E., Seward, D., Busquets, P., Colombo, F., Miocene sedimentary and tectonic evolution of the Andean Precordillera at 31°S, Argentina (2001) Journal of South American Earth Sciences, 14 (7), pp. 735-750
  • Yañez, G.A., Ranero, C.R., von Huene, R., Díaz, J., Magnetic anomaly interpretation across the southern central Andes (32-34°): the role of the Juan Fernández Ridge in the late Tertiary evolution of the margin (2001) Journal of Geophysical Research, 106, pp. 6325-6345

Citas:

---------- APA ----------
Litvak, V.D., Poma, S. & Kay, S.M. (2007) . Paleogene and Neogene magmatism in the Valle del Cura region: New perspective on the evolution of the Pampean flat slab, San Juan province, Argentina. Journal of South American Earth Sciences, 24(2-4), 117-137.
http://dx.doi.org/10.1016/j.jsames.2007.04.002
---------- CHICAGO ----------
Litvak, V.D., Poma, S., Kay, S.M. "Paleogene and Neogene magmatism in the Valle del Cura region: New perspective on the evolution of the Pampean flat slab, San Juan province, Argentina" . Journal of South American Earth Sciences 24, no. 2-4 (2007) : 117-137.
http://dx.doi.org/10.1016/j.jsames.2007.04.002
---------- MLA ----------
Litvak, V.D., Poma, S., Kay, S.M. "Paleogene and Neogene magmatism in the Valle del Cura region: New perspective on the evolution of the Pampean flat slab, San Juan province, Argentina" . Journal of South American Earth Sciences, vol. 24, no. 2-4, 2007, pp. 117-137.
http://dx.doi.org/10.1016/j.jsames.2007.04.002
---------- VANCOUVER ----------
Litvak, V.D., Poma, S., Kay, S.M. Paleogene and Neogene magmatism in the Valle del Cura region: New perspective on the evolution of the Pampean flat slab, San Juan province, Argentina. J. South Am. Earth Sci. 2007;24(2-4):117-137.
http://dx.doi.org/10.1016/j.jsames.2007.04.002