Boletín de Geología

Vol. 38 No. 3 (2016): Boletín de Geología
Articles

PETROGRAPHIC AND CHEMICAL CHARACTERIZATION OF OCEANIC CRUST ROCKS FROM THE COMPLEJO QUEBRADAGRANDE AND COMPARISON WITH THE DIABASAS DE SAN JOSÉ DE URAMA UNIT

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  • Gabriel Rodríguez G.,
  • Lina María Cetina T.
Gabriel Rodríguez G.
Servicio Geológico Colombiano
Lina María Cetina T.
Servicio Geológico Colombiano
Bio
DOI: https://doi.org/10.18273/revbol.v38n3-2016001

Published 2016-06-30

Keywords

  • Colombia,
  • Complejo Quebradagrande,
  • Diabasas de San José de Urama unit,
  • “diabasic” textures,
  • geochemistry

How to Cite

Rodríguez G., G., & Cetina T., L. M. (2016). PETROGRAPHIC AND CHEMICAL CHARACTERIZATION OF OCEANIC CRUST ROCKS FROM THE COMPLEJO QUEBRADAGRANDE AND COMPARISON WITH THE DIABASAS DE SAN JOSÉ DE URAMA UNIT. Boletín De Geología, 38(3), 15–29. https://doi.org/10.18273/revbol.v38n3-2016001
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Abstract

The Complejo Quebradagrande unit is formed by “lithological blocks” of sedimentary rocks of marine origin, arc vulcanites (tuffs, andesites and basalts) and oceanic crust “blocks” (basalts and diabases). It is limited to the East by the San Jeronimo fault that separates it from the Complejo Cajamarca unit and to the West by the Silvia-Pijao fault that separates it from the Complejo Arquia unit. The “blocks” of oceanic crust are represented by diabases, variolitic basalts and deformed diabases and basalts, with intergranular, ophitic-subophitic and variolitic textures, mainly composed of plagioclase and clinopyroxene and, as accessory minerals, titanite and opaques. The diabases and basalts of the Complejo Quebradagrande unit are basic rocks with SiO2 values between 44.95% and 50.80%, high concentrations of MgO in the range between 8.9 and 5.42%, Fe2O3 varies between 14.83 and 7.98%, CaO contents are high between 7.55% and 13.2%, values of TiO2 in the majority of samples are between 1 and 2%, low ratio of alkalis vs SiO2 (0.03 to 0.10 wt %) and low K2O values between 0.07% and 0.47%. The rocks correspond to the high in Mg tholeiitic series, little differentiated and of subalkaline affinity, and have greater than 30 Zr/Nb ratios, (La/Sm) N less than 1 and rare earths patterns that suggest affinity with N-MORB type basalts, except two samples (VR-364R and VR-384R) that exhibited patterns similar to the E-MORB. The rocks of the Complejo Quebradagrande unit differ from the Diabasas de San Jose de Urama unit in that the rocks of the latter have Zr/Nb values between 10 and 15, and that the ratios (La/Sm) N present values greater and lower than 1, with flat rare earths patterns similar to type T-MORB basalts. These results suggest that the rocks of these two units correspond to different, not contemporary oceanic crusts, with associated arc rocks that present a difference in the chemical composition, that are not correlatable, except for samples VR-364R and VR-384R, which exhibit a geochemical similarity with the Diabasas de San José de Urama unit.

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References

  1. Álvarez, E., y González, H. 1978. Geología y Geoquimica del Cuadrángulo I-7, Urrao. INGEOMINAS, Medellín, Informe 1761, 347p.
  2. Álvarez, J. 1987. Tectonitas Dunitas de Medellín, Departamento de Antioquia, Colombia. Boletín Geológico INGEOMINAS, 28(3): 9-44.
  3. Aspden, J. 1984. The Geology of the Western Cordillera and Pacific Coastal Plain in teh Departament of Valle del Cauca (Sheets 261, 278, 279, 280, and 299). INGEOMINAS, reporte No. 7, 61p.
  4. Botero, G. 1963. Contribución al conocimiento de la geología de la Zona Central de Antioquia. Anales de la Facultad de Minas, pp. 57-101.
  5. Cochrane, R., Spikings, R., Gerdes, A., Ulianov, A., Mora, A., Villagómez, D., Putlitz, B., and Chiaradia, M. 2014. Permo-Triassic anatexis, continental rifting and the disassembly of western Pangaea. Lithos, 190-191: 383-402.
  6. GEOESTUDIOS-INGEOMINAS. 2005. Complementación geológica y geofísica de la parte occidental de las planchas 130 Santa Fé de Antioquia y 146 Medellín Occidental. Medellín.
  7. González, H. 1976. Geología del Cuadrangulo J-8 (Sonsón). INGEOMINAS, Medellín, Informe 1704, 421p.
  8. González, H. 2001. Mapa geológico del departamento de Antioquia, escala 1:400.000, memoria explicativa. INGEOMINAS, 240p.
  9. Grosse, E. 1926. Estudio Geológico del Terciario Carbonífero de Antioquia. Dietrich Reimer, 361p. Berlín.
  10. Hastie, A., Kerr, A., Pearce, J., and Mitchell, S. 2007. Classification of altered volcanic island arc rocks using immobile trace elements: development of theTh-Co discrimination diagram. Journal of Petrology, 48(12): 2341-2357.
  11. Irvine, T., and Baragar, W. 1971. A guide to the chemical classification of the common volcanic rock. Canadian Journal of Earth Science, 8: 253-548.
  12. Jaramillo, J.S., León-Vasco, S., Cardona, A., Valencia, V., y Vinasco, C. 2014. Complejo Quebradagrande: arco volcánico engrosado generado en un bloque continental con aporte de material Triásico. Resumen XI Semana Técnica de Geología e Ingeniería Geológica, UIS. Bucaramanga.
  13. Jaramillo, J.S., León-Vasco, S., Cardona, A., Valencia, V., y Vinasco, C. 2015. Registro magmático del Complejo Quebradagrande: vestigios de la evolución tectónica entre el Albiano y el Campaniano en los Andes del Norte. Ponencia XV Congreso Colombiano de Geología. Bucaramanga.
  14. Jensen, L. 1976. A new cation plot for classifying subalakalic volcanic rocks. Ontario Division Mines, Miscellaneous, 66p.
  15. Kerr, A., Marriner, G., Arndt, N., Tarney, J., Nivia, A., Saunders, A., and Duncan, R. 1996. The petrogenesis of Gorgona komatiites, picrites and basalts: new field, petrographic and geochemical constraints. Lithos, 37(2): 245-260.
  16. Kerr, A., Marriner, G., Tarney, J., Nivia, A., Saunders, A., Thirlwall, M., and Sinton, C. 1997. Cretaceous basaltic terranes in western Colombia: elemental chronological and Sr-Nd constrainst on petrogenesis. Journal of Petrology, 38: 677-702.
  17. Le Bas, M., Le Maitre, R., Streckeisen, A., and Zannetin, B. 1986. A chemical classification of volcanic rocks based on the Total Alkali - Silica diagram. Journal of Petroleum Science and Engineering, 27: 745-750.
  18. Le Maitre, R., Bateman, P., Dudek, A., Keller, J., Lameyre, J., Le Bas, M M.J., Sabine, P.A., Schmid, R., Sorensen, H., Streckeisen, A., Woolley, A.R., and Zanettin, B. 1989. A classification of igneous rocks and glossary or terms: recommendations of the International Union of Geological Sciences Subcommission on the systematic of igneous rocks. Blackwell Scientific Publications, Oxford, U.K, 193p.
  19. Mejía, M., y Salazar, G. 1989 (publicado 2007). Memoria explicativa de la Geología de la Plancha 114 (Dabeiba) y parte W de la 115 (Toledo). Escala 1:100.000. INGEOMINAS, Medellín. 111p.
  20. McDonough, W. F., and Sun, S. S. 1995. The composition of the Earth. Chemical Geology, 120(3): 223-253.
  21. Moreno-Sánchez, M., Gómez-Cruz, A., y Toro, L. 2008. Proveniencia del material clástico del Complejo Quebradagrande y su relación con los complejos estructurales adyacentes. Boletín Ciencias de la Tierra, 22: 27-38.
  22. Nakamura, N. 1974. Determination of REE, Ba, Fe, Mg, Na and K in carbonaceous and ordinary chondrites. Geochimica et Cosmochimica Acta, 38(5): 757-775.
  23. Nelson, H. 1957. Contribution to the geology of the Central and Western Cordillera of Colombia in the sector between Ibagué and Cali. Leidse Geologische Mededelingen. 22: 1-76.
  24. Nivia, A., Marriner, G., y Kerr, A. 1996. El Complejo Quebradagrande una posible cuenca marginal intracratónica del Cretáceo Inferior en la Cordillera Central de los Andes. VII Congreso Colombiano de Geología, Memoria 3, pp. 108-123.
  25. Nivia, A., Marriner, G., Kerr, A., and Tarney, J. 2006. The Quebradagrande Complex: A Lower Cretaceous ensialic marginal basin in the Central Cordillera of the Colombian Andes. Journal or South American Earth Sciences. 21: 423-436.
  26. Pardo-Trujillo, A., Cardona, A., Silva, J. C., Borrero, C., y Tamayo, J. E. 2011. Geocronología U/Pb en circones detríticos del Complejo Quebradagrande: nuevos datos sobre la procedencia de los sedimentos cretáceos en la margen NW de Suramérica. XIV Congreso Latinoamericano de Geología y XIII Congreso Colombiano de Geología.
  27. Pearce, J. 1982. Trace element characteristics of lavas from destructive plate boundaries. En Thorpe R.S. (ed.) Andesites, pp. 525-548.
  28. Pearce, J. 2008. Geochemical fingerprinting of oceanic basalts with applications to ophiolite classification and the search for Archean oceanic crust. Lithos, 100: 14-48.
  29. Pearce, J., and Peate, D. 1995. Tectonic implications of the composition of volcanic arc magmas. Earth and Planetary Science, 23: 251-85.
  30. Rodríguez, G., y Arango, M. 2013a. Formación Barroso: arco volcánico toleítico y Diabasas de San José de Urama: un prisma acrecionario T-Morb en el segmento norte de la Cordillera Occidental de Colombia. Boletín Ciencias de la Tierra, 33: 17-38.
  31. Rodriguez, G., y Arango, M. 2013b. Reinterpretación geoquímica y radiométrica de las matabasitas del Complejo Arquía. Boletín de Geología, 35(2): 65-81.
  32. Rodríguez, G., y Zapata, G. 2013. Análisis comparativo entre la Formación Barroso y el Complejo Quebradagrande: un arco volcánico toleítico-calcoalcalino, segmentado por el sistema de fallas de Romeral en los Andes del Norte? Boletín Ciencias de la Tierra, 33: 39-58.
  33. Rodríguez, G., Zapata, G., y Gómez, J. 2010. Geología de la parte oriental de la plancha 114 Dabeiba. INGEOMINAS, 172p.
  34. Sun, S., and McDonough, W. 1989. Chemical and isotropic systematics of oceanic basalts: implications for mantle composition and processes. Magmatism in ocean basin, Geology Society Special Publication, No 42; London, pp. 313-345.
  35. Villagómez, D., Spikings, R., Magna, T., Kammer, A., Winkler, W., and Beltrán, A. 2011. Geochronology, geochemistry and tectonic evolution of the Western and Central cordilleras of Colombia. Lithos, 125: 875-896.
  36. Wilson, M. 1989. Igneous petrogenesis: a global tectonic approach. Unwin Hyman (editor), London, 466p.
  37. Wood, D. 1980. The aplication of Th-Hf-Ta diagram to problems of tectonomagmatic classification and establishing the nature of cristal contamination of basaltic lavas of rhe British Tertiary volcanic province. Earth Planet Science Letters, 50: 11-30.