Keywords
geothermobarometry
metapelite
garnet-amphibolite
Custepec
Chiapas Massif
Maya block
Mexico
How to Cite
Citas en Dimensions Service
Abstract
The Chiapas Massif, located in the southwestern Maya terrane, is primarily composed of igneous and metaigneous rocks of Late Permian - early Triassic age, although two distinct metasedimentary units have also been recognized. The Sepultura Unit, located in the nothwestern Chiapas Massif, is composed of psammites, pelites and calcsilicate rocks metamorphosed under high-T, low- to medium-P conditions. The Custepec Unit, which is the object of this study, is located in the central-southeastern portion of the Chiapas Massif and is composed of partially melted amphibolites interbedded with quartzofeldspathic and pelitic gneisses, marbles, calcsilicate rocks, and quartzites. Geothermobarometry of a metapelite and an amphibolite yielded consistent metamorphic conditions of ~800 ºC and 9 kbar. These pressure and temperature estimates, along with petrographic observations indicate that metamorphic conditions were in the amphibolite-granulite facies transition at ~25–30 km depth. A Sm-Nd garnet-whole rock age of 268 ± 9 Ma, which predates a previously published U-Pb zircon age of anatectic and metamorphic zircons of 252 ± 4 Ma, indicates that Sm and Nd in garnet behaved as a closed system during high-grade metamorphism, while zircon crystallized at temperatures below the metamorphic peak. The high-grade metamorphic event was followed by a phase of isobaric cooling, medium grade retrogression reactions, uplift and greenschist facies diaphtoresis accompanied by further ductile deformation.
References
Bateson, J.H., Hall, I.H.S., 1977, The geology of the Maya Mountains, Belize: Institute of Geological Science, Her Majesty´s Stationery Office, Overseas Memoir 3, 43.
Becker, H., 1997, Sm-Nd garnet ages and cooling history of high-tem-perature garnet peridotite massifs and high-pressure granulites from lower Austria: Contributions to Mineralogy and Petrology, 127, 224-236.
Bohlen, S.R., Wall, V.J., Boetcher, A.l., 1983, Experimental investigations and geological applications of equilibria in the system FeO-TiO2-Al2O3-SiO2-H2O: American Mineralogist, 68, 1049-1058.
Burkart, B., 1983, Neogene North American-Caribbean plate boundary across northern central america: Offset along the Polochic fault: Tectonophysics, 99, 251-270.
Burkart, B., Self, S., 1985, Extension and rotation of crustal blocks in northern Central America and effect on the volcanic arc: Geology, 13 (1), 22-26.
Campa, M.F., Coney, P.J., 1983, Tectono-stratigraphic terranes and min-eral resource distributions in Mexico: Canadian Journal of Earth Sciences, 20, 1040-1051.
Cohen, A.S., O’Nions, R.K., Siegenthaler, R., Griffin, W.L., 1988, Chronology of the pressure history recorded by granulite terrane: Contributions to Mineralogy and Petrology, 98, 303-311.
Damon, P.E., Shafiqullah, M., Clark, K., 1981, Age trends of igneous activity in relation to metallogenesis in the southern Cordillera, in Dickinson, W., Payne, W.D. (eds.), Relations of Tectonics to Ore Deposits in the Southern Cordillera: Tucson, Arizona, Arizona Geological Society Digest, 14, 137-153.
Dengo, G., 1985, Mid America; tectonic setting for the Pacific margin from southern Mexico to northwestern Colombia, in Nairn. A.E.M., Stehli, F.G. (eds.), The Ocean Basins and Margins, 7a. The Pacific Ocean: New York, Plenum Press, 123-180.
Dickinson, W.R., Lawton, T.F., 2001, Carboniferous to Cretaceous assem-bly and fragmentation of Mexico: Geological Society of America Bulletin, 113(9), 1142–1160.
Ducea, M.N., Gehrels, G.E., Shoemaker, S., Ruiz, J., Valencia, V.A., 2004, Geologic evolution of the Xolapa Complex, southern Mexico: Evidence from U-Pb zircon geochronology: Geological Society of America Bulletin, 116 (7-8), 1016-1025.
Elías-Herrera, M., Ortega-Gutiérrez, F., 2002, Caltepec fault zone: An early Permian dextral transpressional boundary between the Proterozoic Oaxacan and Paleozoic Acatlán complexes, southern México, and regional tectonic implications: Tectonics, 21, 1-19.
Esawi, E.K., 2004, AMPH-CLASS: An Excel spreadsheet for the clas-sification and nomenclature of amphiboles based on the 1997 recommendations of the International Mineralogical Association: Computers and Geosciences, 30, 753-760.
Ganguly, J., Saxena, S.K., 1984, Mixing properties of aluminosilicate garnets: constraints from natural and experimental data, and applications to geothermo-barometry: American Mineralogist, 69, 88-97.
Harlow, G.E., Hemming, S.R., Avé Lallemant, H.G., Sisson, V.B., Sorensen, S.S., 2004, Two high-pressure-low-temperature serpentinite-ma-trix mélange belts, Motagua fault zone, Guatemala: A record of Aptian and Maastrichtian collisions: Geology, 32(1), 17-20.
Hensen, B.J., Zhou, B., 1995, Retention of isotopic memory in garnets partially broken down during an overprinting granulite-facies metamorphism; implications for the Sm-Nd closure temperature: Geology, 23(3), 225-228.
Hiller, R., Weber, B., Hecht, L., Ortega-Gutiérrez, F., Schaaf, P., López-Martínez, M., 2004, The ‘Sepultura’ unit – A medium to high grade metasedimentary sequence in the Chiapas Massif, SE México (abstract), in Reunión Nacional de Ciencias de la Tierra, Libro de Resúmenes, Querétaro, México: GEOS, 24(2), 297-298.
Hodges, K.V., Spear, F.S., 1982, Geothermometry, geobarometry and the Al2SiO5 triple point at Mt. Moosilauke, New Hampshire: American Mineralogist, 67, 1118-1134.
Holdaway, M.J., 1971, Stability of andalusite and the aluminum silicate phase diagram: American Mineralogist, 271, 97-131.
Holland, T.J.B., Blundy, J., 1994, Non-ideal interactions in calcic amphi-boles and their bearing on amphibole-plagioclase thermometry: Contributions to Mineralogy and Petrology, 116(4), 433-447.
Keppie, J.D., Dostal, J., Murpy, J.B., Nance, R. D., 2008, Synthesis and tectonic interpretation of the westernmost Paleozoic Variscan orogen in southern Mexico: From rifted Rheic margin to active Pacific margin: Tectonophysics, 461(1-4), 277-290, doi:10.1016/j.tecto.2008.01.012.
Kohn, M.J., Spear, F.S., 1990, Two new geobarometers for garnet am-phibolites, with applications to southeastern Vermont: American Mineralogist, 75, 89-96.
Kohn, M.J., Spear, F.S., 2000, Retrograde net transfer reaction insurance for pressure-temperature estimates: Geology, 28(12), 1127-1130.
Leake, B.E., Woolley, A.R., Arps, C.E.S., Birch, W.D., Gilbert, M.C., Grice, J.D., Hawthorne, F.C., Kato, A., Kisch, H.J., Krivovichev, V.G., Kees Linthout, J.L., Mandarino, J.A., Maresch, W.V., Nickel, E.H., Rock, N.M.S., Schumacher, J.C., Smith, D.C., Stephenson, N.C.N., Ungaretti, L., Whittaker, E.J.W., Youzhi, G., 1997, Nomenclature of amphiboles; Report of the Subcommittee on Amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names: American Mineralogist, 82(9-10), 1019-1037.
Manton, W.I., 1996, The Grenville of Honduras (abstract), in Geological Society of America Annual Meeting, Denver, Colorado: Geological Society of America, Abstracts with Programs, 28, A-493.
Martens, U., Ratschbacher, L., McWilliams, M., 2005, U-Pb Geochronology of the Maya Block, Guatemala (abstract): Eos Transactions, American Geophysical Union, 86(52), Fall Meeting Supplement, Abstract T51D-1387.
Martens, U., Weber, B., Valencia, V.A., 2006, Zircon geochronology implies the existence of pre-Devonian sedimentary rocks with Grenvillian provenance in the Maya Mountains of Belize (ab-stract) in: Geological Society of America Annual Meeting, Philadelphia, Pennsylvania: Geological Society of America, Abstracts with Programs, 38(7), p. 504.
Martens, U., Liou, J.G., Solari, L.A., Mattison, C.G., Wooden, J., 2007, Petrotectonic evolution of the Chuacús Complex, central Guatemala, by U/Pb geochronology (abstract): Eos Transactions, American Geophysical Union, 88(52), Fall Meeting Supplement, Abstract T11D-08.
Morán-Centeno, D., 1984, Geología de la República Mexicana: México, Universidad Nacional Autónoma de México, Instituto Nacional de Estadística, Geografia e Informática (INEGI), 88 p.
Muehlberger, W.R., Ritchie, A.W., 1975, Caribbean-Americas plate boundary in Guatemala and southern Mexico as seen on Skylab IV orbital photography: Geology, 3(5), 232-235.
Nelson, B.K., Herrmann, U.R., Gordon, M.B., Ratschbacher, L., 1997, Sm-Nd and U-Pb evidence for Proterozoic crust for in the Chortis block, Central America: Comparison with the crustal history of southern Mexico: Terra Nova, 9(1), 496.
Ortega-Gutiérrez, F., 1981, Metamorphic belts of Southern Mexico and their tectonic significance: Geofísica Internacional, 20, 177-202.
Ortega-Gutiérrez, F., 1984, Evidence of Precambrian evaporites in the Oaxacan granulite complex of southern Mexico: Precambrian Research, 23, 377-393.
Ortega-Gutiérrez, F., Solari, L.A., Solé, J., Martens, U., Gómez-Tuena, A., Morán-Ical, S., Reyes-Salas, M., Ortega-Obregón, C., 2004, Polyphase, high-temperature eclogite-facies metamorphism in the Chuacús Complex, central Guatemala: Petrology, geochronol-ogy, and tectonic implications: International Geology Review, 46, 445-470.
Ortega-Gutiérrez, F., Solari, L.A., Ortega-Obregón, C., Elías-Herrera, M., Martens, U., Morán-Ical, S., Chiquín, M., Keppie, J.D., Torres de León, R., Schaaf, P., 2007, The Maya-Chortis boundary: a tectonostratigraphic approach: International Geology Review, 49(11), 996-1024.
Schaaf, P., Weber, B., Weis, P., Groβ, A., Ortega-Gutiérrez, F., Kohler, H., 2002, The Chiapas Massif (Mexico) revised: New geologic and isotopic data and basement characteristics, in Miller, H.E. (ed.), Contributions to Latin-American Geology: Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 1-23.
Sedlock, R.L., Ortega-Gutiérrez, F., Speed, R.C., 1993, Tectonostratigraphic terranes and tectonic evolution of Mexico: Geological Society of America, Special Paper 278, 153.
Solari, L.A., Dostal, J., Ortega-Gutiérrez, F., Keppie, J.D., 2001, The 275 Ma arc-related La Carbonera Stock in the northern Oaxaca Complex of southern Mexico: U-Pb geochronology and geo-chemistry: Revista Mexicana de Ciencias Geológicas, 18(2), 149-161.
Solari, L.A., Keppie, J.D., Ortega-Gutiérrez, F., Cameron, K.L., Lopez, R., Hames, W.E., 2003, 990 and 1100 Ma Grenvillian tectonothermal events in the northern Oaxacan complex, southern México: roots of an orogen: Tectonophysics, 365, 257-282.
Solari, L.A., Ortega-Gutiérrez, F., Elías-Herrera, M., Schaaf, P., Norman, M., Torres de León, R., Ortega-Obregón, C., Chiquín, M., Morán-Ical, S., in press, U-Pb zircon geochronology of Paleozoic units in Western and Central Guatemala: insights into the tectonic evolution of Middle America, in Pindell, J., James, K.H. (ed.), Origin of the Caribbean Plate: Journal of the Geological Society of London, Special Publication.
Spear, F.S., Kohn, M.J., 1999, Program Thermobarometry [on-line] v.
1: Rensselaer Polytechnic Institute, Department of Earth & Environmental Sciences, Metamorphic Petrology Research Laboratory, <http://ees2.geo.rpi.edu/MetaPetaRen/Software/ Software.html>.
Spear, F.S., Kohn, M.J., Florence, F.P., Menard, T., 1990, A model for garnet and plagioclase growth in pelitic schists: implications for thermobarometry and P-T path determinations: Journal of Metamorphic Geology, 8 (6), 683-696.
Steiner, M.B., Walker, J.D., 1996, Late Silurian plutons in Yucatan: Journal of Geophysical Research, 101(B8), 17727-17735.
Torres, R., Ruiz, J., Patchett, P.J., Grajales, J.M, 1999, Permo-Triassic continental arc in eastern Mexico: Tectonic implications for reconstructions of southern North America: Geological Society of America, Special Paper 340, 191–196.
Viele, G.W., Thomas, W.A., 1989, Tectonic synthesis of the Ouachita orogenic belt, in Hatcher, R.D. Jr., Thomas W.A., Viele, G.W. (eds.), The Apalachian-Ouachita Orogen in the United States: Boulder, Colorado, Geological Society of America, Geology of North America, F-2, 695-728.
Weber, B., Köhler, H., 1999, Sm-Nd, Rb-Sr and U-Pb isotope geo-chronology of a Grenville terrane in Southern México: Origin and geologic history of the Guichicovi complex: Precambrian Research, 96, 245-262.
Weber, B., López-Martínez, M., 2006, Pb, Sr, and Nd isotopic and chemi-cal evidence for an oceanic island arc formation of the El Arco porphyry copper deposit (Baja California, Mexico): Mineralium Deposita, 40(6-7), 707-725.
Weber, B., Gruner, B., Hecht, L., Molina-Garza, R., Köhler, H., 2002, El descubrimiento de basamento metasedimentario en el macizo de Chiapas: La “Unidad La Sepultura”: GEOS, 22(1), 2-11.
Weber, B., Cameron, K.L., Osorio, M., Schaaf, P., 2005, A late Permian tectonothermal event in Grenville crust of the Southern Maya terrane: U-Pb zircon ages from the Chiapas massif, Southeastern Mexico: International Geology Review, 47, 509-529.
Weber, B., Iriondo, A., Premo, W.R., Hecht, L., Schaaf, P., 2007, New insights into the history and origin of the southern Maya Block, SE México: U-Pb-SHRIMP zircon geochronology from metamor-phic rocks of the Chiapas Massif: International Journal of Earth Sciences (Geologische Rundschau), 96, 253-269.
Weber, B., Valencia, V.A., Schaaf, P., Pompa Mera, V., Ruiz, J., 2008, Significance of provenance ages from the Chiapas Massif complex (SE México): Redefining the Paleozoic basement of the Maya block and its evolution in a Peri-Gondwanan realm: The Journal of Geology, 116(6), 619-637.
Yañez, P., Ruiz, J., Patchett,P.J., Ortega-Gutiérrez, F., Gehrels, G.E., 1991, Isotopic studies of the Acatlán Complex, southern Mexico: Implications for Paleozoic North American tectonics: Geological Society of America Bulletin, 103, 817-828.
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Copyright (c) 2009 Juliana Estrada-Carmona, Bodo Weber, Lutz Hecht, Uwe Martens