Navegar

Colección

Datos Estadísticas

Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The Sierra de Pie de Palo of northwest Argentina preserves middle to lower crustal metamorphic rocks that were penetratively deformed during Ordovician accretion of the Precordillera terrane to the Gondwana margin. New structural, petrologic, and geochronologic data from a 40 km structural transect reveals that the Sierra de Pie de Palo preserves a middle to lower crustal ductile thrust complex consisting of individual structural units and not an intact ophiolite and cover sequence. Top-to-the-west thrusting occurred intermittently on discrete ductile shear zones from ∼515 to ∼417 Ma and generally propagated toward the foreland with progressive deformation. Ordovician crustal shortening and peak metamorphic temperatures in the central portion of the Sierra de Pie de Palo were synchronous with retro-arc shortening and magmatic flare-up within the Famatina arc. Accretion of the Precordillera terrane resulted in the end of arc flare-up and the onset of synconvergent extension by ∼439 Ma. Continued synextensional to postextensional convergence was accommodated along progressively lower grade shear zones following terrane accretion and the establishment of a new plate margin west of the Precordillera terrane. The results support models of Cordilleran orogens that link voluminous arc magmatism to periods of regional shortening. The deformation, metamorphic, and magmatic history within the Sierra de Pie de Palo is consistent with models placing the region adjacent to the Famatina margin in the middle Cambrian and not as basement to the Precordillera terrane. Copyright 2011 by the American Geophysical Union.

Registro:

Documento: Artículo
Título:Structural evolution of a composite middle to lower crustal section: The Sierra de Pie de Palo, northwest Argentina
Autor:Mulcahy, S.R.; Roeske, S.M.; McClelland, W.C.; Jourdan, F.; Iriondo, A.; Renne, P.R.; Vervoort, J.D.; Vujovich, G.I.
Filiación:Department of Geoscience, University of Nevada, Las Vegas, Las Vegas, NV, United States
Department of Earth and Planetary Sciences, University of California, Berkeley, CA 94720-4767, United States
Department of Geology, University of California, Davis, CA 95616, United States
Department of Geoscience, University of Iowa, Iowa City, IA 52242, United States
Western Australian Argon Isotope Facility, Department of Applied Geology and JdLCMS, Curtin University of Technology, Perth, WA 6845, Australia
Berkeley Geochronology Center, Berkeley, CA 94709, United States
Centro de Geociencias, Universidad Nacional Autónoma de México, Campus Juriquilla, Querétaro, 76230, Mexico
Department of Earth and Planetary Science, University of California, Berkeley, CA, United States
School of Earth and Environmental Sciences, Washington State University, Pullman, WA 99164, United States
Department of Geology, University of Buenos Aires-CONICET, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
Palabras clave:Deformation; Stratigraphy; Tectonics; Arc magmatism; Cambrians; Crustal shortening; Ductile shear zone; Ductile thrusts; Northwest Argentina; Ordovician; Orogens; Progressive deformation; Shear zone; Structural evolution; Structural unit; Synconvergent extension; Terrane accretion; Metamorphic rocks; accretion; Cambrian; crustal shortening; deformation; geochronology; Gondwana; Ordovician; orogeny; petrology; shear zone; structural geology; tectonic evolution; terrane; Argentina; Precordillera
Año:2011
Volumen:30
Número:1
DOI: http://dx.doi.org/10.1029/2009TC002656
Título revista:Tectonics
Título revista abreviado:Tectonics
ISSN:02787407
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02787407_v30_n1_p_Mulcahy

Referencias:

  • Astini, R.A., Stratigraphical evidence supporting the rifting, drifting and collision of the Laurentian Precordillera terrane of western Argentina (1998) Geol. Soc. Spec. Publ., 142, pp. 11-33
  • Astini, R.A., Dávila, F.M., Ordovician back arc foreland and Ocloyic thrust belt development on the western Gondwana margin as a response to Precordillera terrane accretion (2004) Tectonics, 23, pp. TC4008. , doi:10.1029/2003TC001620
  • Astini, R.A., Thomas, W.A., Origin and evolution of the Precordillera terrane of western Argentina: A drifted Laurentian orphan (1999) Laurentia- Gondwana Connections before Pangea, 336, pp. 1-20. , edited by V. A. Ramos and J. D. Keppie, Spec. Pap. Geol. Soc. Am
  • Astini, R.A., Benedetto, J.L., Vaccari, N.E., The Early Paleozoic evolution of the Argentine Precordillera as a Laurentian rifted, drifted, and collided terrane: A geodynamic model (1995) Geol. Soc. Am. Bull., 107, pp. 253-273
  • Benedetto, J.L., Sanchez, T.M., Carrera, M.G., Brussa, E.D., Salas, M.J., Paleontological constraints on successive paleogeographic positions of Precordillera terrane during the early Paleozoic (1999) Laurentia-Gondwana Connections before Pangea, 336, pp. 21-42. , edited by V. A. Ramos and J. D. Keppie, Spec. Pap. Geol. Soc. Am
  • Bouvier, A., Vervoort, J.D., Patchett, P.J., The Lu-Hf and Sm-Nd isotopic composition CHUR: Constraints from unequilibrated chondrites and implications for the bulk composition of terrestrial planets (2008) Earth Planet. Sci. Lett., 273, pp. 48-57
  • Casquet, C., Baldo, E., Pankhurst, R.J., Rapela, C.W., Galindo, C., Fanning, C.M., Saavedra, J., Involvement of the Argentine Precordillera terrane in the Famatinian mobile belt: U-Pb SHRIMP and metamorphic evidence from the Sierra de Pie de Palo (2001) Geology, 29, pp. 703-706
  • Dalla Salda, L., Varela, R., El metamorfismo en el tercio sur de la sierra de Pie de Palo (1984) San Juan, Asoc. Geol. Argent. Rev., 39, pp. 68-93
  • Davis, J.S., Roeske, S.M., McClelland, W.C., Snee, L.W., Closing the ocean between the Precordillera terrane and Chilenia: Early Devonian ophiolite emplacement and deformation in the southwest Precordillera (1999) Laurentia-Gondwana Connections before Pangea, 336, pp. 115-138. , edited by V. A. Ramos and J. D. Keppie, Spec. Pap. Geol. Soc. Am
  • De Celles, P.G., Ducea, M.N., Kapp, P., Zandt, G., Cyclicity in Cordilleran orogenic systems (2009) Nat. Geosci., 2, pp. 251-257
  • Ducea, M.N., The California arc: Thick granitic batholiths, eclogitic residues, lithospheric-scale thrusting, and magmatic flare-ups (2001) GSA Today, 11, pp. 4-10
  • Ducea, M.N., Barton, M.D., Igniting flare-up events in California arcs (2007) Geology, 35, pp. 1047-1050
  • Ducea, M.N., Otamendi, J.E., Bergantz, G., Stair, K.M., Valencia, V.A., Gehrels, G.E., Timing constraints on building an intermediate plutonic arc crustal section: U-Pb zircon geochronology of the Sierra Valle Fértil-La Huerta, Famatinian Arc, Argentina (2010) Tectonics, 29, pp. TC4002. , doi:10.1029/2009TC002615
  • Fanning, C.M., Pankhurst, R.J., Rapela, C.W., Baldo, E.G., Casquet, C., Galindo, C., K-bentonites in the Argentine Precordillera contemporaneous with rhyolite volcanism in the Famatinian Arc (2004) J. Geol. Soc., 161, pp. 747-756
  • Galindo, C., Casquet, C., Rapela, C.W., Pankhurst, R.J., Baldo, E., Saavedra, J., Sr C, and O isotope geochemistry and stratigraphy of Precambrian and lower Paleozoic carbonate sequences from the western Sierras Pampeanas of Argentina: Tectonic implications (2004) Precambrian Res., 131, pp. 55-71
  • Huff, W.D., Bergstrom, S.M., Kolata, D.R., Cingolani, C.A., Astini, R.A., Ordovician K-bentonites in the Argentine Precordillera: Relations to Gondwana margin evolution (1998) The Proto-Andean Margin of Gondwana, 142, pp. 107-126. , edited by R. J. Pankhurst and C. W. Rapela, Geol. Soc. Spec. Publ
  • Kohn, M.J., Models of garnet differential geochronology (2009) Geochim. Cosmochim. Acta, 73, pp. 170-182
  • Kretz, R., Symbols for rock-forming minerals (1983) Am. Mineral., 68, pp. 277-279
  • McClelland, W.C., Roeske, S.M., Vujovich, G.I., Mulcahy, S.R., Ellis, J.R., U-Pb SHRIMP evidence for allochthonous elements between the Precordillera terrane and Gondwana margin, Sierra de la Huerta, northwest Argentina (2005) GAC-MAC Annual Meeting, Geol. Assoc. of Can., , Halifax, N. S., Canada
  • McDonough, M.R., Ramos, V.A., Isachsen, C.E., Bowring, S.A., Vujovich, G.I., Edades priliminares de circones del basamento de la Sierra de Pie de Palo, Sierras Pampeanas occidentales de San Juan: Sus implicancias para el supercontinente Proterozoico de Rodinia (1993) XIII Congreso Geológico Argentino y II Congreso de Exploración de Hidrocarburos, 3, pp. 340-342. , Argentine Geol. Congr., Buenos Aires
  • McDougall, I., Harrison, T.M., (1999) Geochronology and Thermochronology by the 40Ar/39Ar Method, , Oxford Univ. Press, New York
  • Mulcahy, S.R., Roeske, S.M., McClelland, W.C., Nomade, S., Renne, P.R., Cambrian initiation of the Las Pirquitas thrust of the western Sierras Pampeanas, Argentina: Implications for the tectonic evolution of the proto-Andean margin of South America (2007) Geology, 35, pp. 443-446
  • Naipauer, M., Vujovich, G.I., Cingolani, C.A., McClelland, W.C., Detrital zircon analysis from the Neoproterozoic-Cambrian sedimentary cover (Cuyania terrane), Sierra de Pie de Palo, Argentina: Evidence of a rift and passive margin system? (2010) J. South Am. Earth Sci., 29, pp. 306-326
  • Pankhurst, R.J., Rapela, C.W., The proto- Andean margin of Gondwana: An introduction (1998) Geol. Soc. Spec. Publ., 142, pp. 1-9
  • Pankhurst, R.J., Rapela, C.W., Fanning, C.M., Age and origin of coeval TTG I- and Stype granites in the Famatinian belt of NW Argentina (2000) Trans. R. Soc. Edinburgh Earth Sci., 91, pp. 151-168
  • Powell, R., Holland, T., Optimal geothermometry and geobarometry (1994) Am. Mineral., 79, pp. 120-133
  • Quenardelle, S.M., Ramos, V.A., Ordovician western Sierras Pampeanas magmatic belt: Record of Precordillera accretion in Argentina (1999) Laurentia-Gondwana Connections before Pangea, 336, pp. 63-86. , edited by V. A. Ramos and J. D. Keppie, Spec. Pap. Geol. Soc. Am
  • Ramos, V.A., Cuyania, an exotic block to Gondwana: Review of a historical success and the present problems (2004) Gondwana Res., 7, pp. 1009-1026
  • Ramos, V.A., Vujovich, G.I., Dallmeyer, R.D., Los klippes y ventanas tectónicas preándicas de la Sierra de Pie de Palo (San Juan): Edad e implicaciones tectónicas (1996) XIII Congreso Geológico Argentino y III Congreso de Exploración de Hidrocarburos, 5, pp. 377-391. , Argentine Geol. Congr., Buenos Aires
  • Ramos, V.A., Dallmeyer, R.D., Vujovich, G., Time constraints on the Early Paleozoic docking of the Precordillera, central Argentina (1998) Geol. Soc. Spec. Publ., 142, pp. 143-158
  • Rapela, C.W., Pankhusrt, R.J., Casquet, C., Baldo, E., Galindo, C., Fanning, C.M., Dahlquist, J.M., The western Sierras Pampeanas: Protracted Grenville-age history (1330-1030 Ma) of intraoceanic arcs, subduction-accretion at continentaledge and AMCG intraplate magmatism (2010) J. South Am. Earth Sci., 29, pp. 105-127
  • Scherer, E., Münker, C., Mezger, K., Calibration of the lutetium-hafnium clock (2001) Science, 293, pp. 683-687
  • Söderlund, U., Patchett, P.J., Vervoort, J.D., Isachsen, C.E., The 176 Lu decay constant determined by Lu-Hf and U-Pb isotope systematics of Precambrian mafic intrusions (2004) Earth Planet. Sci. Lett., 219, pp. 311-324
  • Thomas, W.A., Astini, R.A., Vestiges of an Ordovician west-vergent thin-skinned Ocloyic thrust belt in the Argentine Precordillera, southern Central Andes (2007) J. Struct. Geol., 29, pp. 1369-1385
  • Van Staal, C.R., Vujovich, G.I., Naipauer, M., An Alpine-style Ordovician collision complex in the Sierra de Pie de Palo, Argentina: Record of subduction of Cuyania beneath the Famatina arc (2010) J. Struct. Geol., , doi:10.1016/j.jsg.2010.10.011, in press
  • Varela, R., Dalla Salda, L., Geocronología Rb-Sr de metamorfitas y granitoides del extremo sur de la Sierra Pie de Palo, San Juan (1992) Asoc. Geol. Argent. Rev., 47, pp. 271-275
  • Vujovich, G.I., Kay, S.M., A Laurentian? Grenville-age oceanic arc/back-arc terrane in the Sierra de Pie de Palo, western Sierras Pampeanas, Argentina (1998) The Proto-Andean Margin of Gondwana, 142, pp. 159-180. , edited by R. J. Pankhurst and C. W. Rapela, Geol. Soc. Spec. Publ
  • Vujovich, G.I., Van Staal, C.R., Davis, W., Age constraints on the tectonic evolution and provenance of the Pie de Palo complex, Cuyania Composite terrane, and the Famatinian orogeny in the Sierra Pie de Palo, San Juan, Argentina (2004) Gondwana Res., 7, pp. 1041-1056

Citas:

---------- APA ----------
Mulcahy, S.R., Roeske, S.M., McClelland, W.C., Jourdan, F., Iriondo, A., Renne, P.R., Vervoort, J.D.,..., Vujovich, G.I. (2011) . Structural evolution of a composite middle to lower crustal section: The Sierra de Pie de Palo, northwest Argentina. Tectonics, 30(1).
http://dx.doi.org/10.1029/2009TC002656
---------- CHICAGO ----------
Mulcahy, S.R., Roeske, S.M., McClelland, W.C., Jourdan, F., Iriondo, A., Renne, P.R., et al. "Structural evolution of a composite middle to lower crustal section: The Sierra de Pie de Palo, northwest Argentina" . Tectonics 30, no. 1 (2011).
http://dx.doi.org/10.1029/2009TC002656
---------- MLA ----------
Mulcahy, S.R., Roeske, S.M., McClelland, W.C., Jourdan, F., Iriondo, A., Renne, P.R., et al. "Structural evolution of a composite middle to lower crustal section: The Sierra de Pie de Palo, northwest Argentina" . Tectonics, vol. 30, no. 1, 2011.
http://dx.doi.org/10.1029/2009TC002656
---------- VANCOUVER ----------
Mulcahy, S.R., Roeske, S.M., McClelland, W.C., Jourdan, F., Iriondo, A., Renne, P.R., et al. Structural evolution of a composite middle to lower crustal section: The Sierra de Pie de Palo, northwest Argentina. Tectonics. 2011;30(1).
http://dx.doi.org/10.1029/2009TC002656