Boletín de Geología

Vol. 28 No. 2 (2006): Boletin de Geología
Articles

PRESENCE OF CHLORITOID IN THE CRETACEOUS ROCKS OF THE WESTERN EMERALD BELT (CORDILLERA ORIENTAL, COLOMBIA): GENETIC IMPLICATIONS

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  • F.L Mantilla,
  • G. Reyes,
  • D. Montoya,
  • J. Mojica

How to Cite

Mantilla, F., Reyes, G., Montoya, D., & Mojica, J. (2006). PRESENCE OF CHLORITOID IN THE CRETACEOUS ROCKS OF THE WESTERN EMERALD BELT (CORDILLERA ORIENTAL, COLOMBIA): GENETIC IMPLICATIONS. Boletín De Geología, 28(2). Retrieved from https://revistas.uis.edu.co/index.php/revistaboletindegeologia/article/view/849
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Abstract

 

The Cretaceous rocks that crop out in the Muzo-Quípama area, which belong to the Capotes, Tablazo and Pacho Formations (with late Aptian and late Albian ages), contain pyrophyllite and chloritoid microporphyroblasts (indicators of low-grade or very low-grade metamorphism).

The Muzo and Rosablanca Formations (with Hauterivian-Barremian and Valangianian ages, respectively), show more deformations and a wide hydrothermal veins profusion, wich are considered evidences of the hot migrating fluids flow. To these two units the emerald deposits in the west emerald belt of the Cordillera Oriental of Colombia are confined. The temperatures reported for chloritoids and emeralds formations, surprisingly are similar. The participation of hydrothermal fluids in both cases, could be another common feature for these both phenomena. However, there are not overwhelming evidences that allow to relate these with the same thermal (hydrothermal) event.

Key Words: Chloritoid, pyrophyllite, Cordillera Oriental, Western Emerald Belt.

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References

Ashworth, J. R., Evirgen, M. M., (1984). Mineralchemistry of regional chloritoid assemblages in theChlorite Zone, Lycian Nappes, South-west Turkey.Mineralogical Magazine. Vol. 48. 347. Pp. 159-165

Baltatzis, E., (1980). Chloritoid-forming reaction in theeastern Scottish Dalradian: a possibility. N. Jah. Mine.Ab. 7. Pp. 306-313

Barnicoat, A. C., Henderson, I. H. C., Knipe, R. J.,Yardley, B. W. D., Napier, R. W., Fox, N. P. C., Kenyon, A.K., Muntingh, D. J., Strydom, D., Winkler, K. S.,Lawrence, S. R., Cornford, C., (1997a). Hydrotermal gold

Barnicoat, A. C., Henderson, I. H. C., Napier, R. W.,Knipe, R. J., Kenyon, A. K.,(1997b). Paragenetic andstructural studies of Witwatersrand gold reefs. In:Geofluids II. Second International Conference on fluidEvolution, Migration and Interaction in SedimentaryBasin and Orogenic Belts. Pp. 428-431.3

Bucher, K., Frey, M., (1994). Petrogenesis ofmetamorphic rocks. Springer-Verlag ed. Pp. 1-318.

Casquet, C.,Galindo, C.,González Casado, J. M.,Alonso, M., Mas, R., Rodas, M., García, E., Barrenechea,J. F., (1992). El metamorfismo en la cuenca de los Cameros.Geocronología e Implicaciones tectónicas. Geogaceta,11. Pp. 22-25

Deer, W. A., Howie, R. A., Zussman, J., (1982). Rock-forming minerals. Orthosilicates. 1A. Longman. Pp. 1-919.

Fox, N., Winkler, S., (1997). Hydrotermal alteration ofthe Witwatersrand Basin. In: Geofluids II. SecondInternational Conference on fluid evolution, migrationand interacion in Sedimentary Basin and Orogenic Belts.Pp. 440- 443

Frey, M., Wieland, B., (1975). Chloritoid in authochthon-parautocthonen sedimenten des Aamasius. Sch. Min.Petrol. 8. Pp. 268-282

Ganguly, J., (1969). Chloritoid stability and relatedparageneses: theory, experiments, and applicatios. Am.Journal of Science. Vol.267. Pp. 910-944

Hoschek, G., (1969). The stability of staurolite andchloritoid and their significance in metamorphism ofpelitic rocks: Contributions to Mineralogy and Petrology.22. Pp. 208-232

Mantilla Figueroa, L. C., Casquet, C., Galindo, C., Mas,R., (2005). El metamorfismo hidrotermal Cretácico yPaléogeno en la Cuenca de Cameros (Cordillera Ibérica,España). Zubia Monográfico. Revista de Ciencias. No.14 (2002), Logroño (España-2002). pp. 143-154

Mantilla Figueroa, L.C., (1999). El Metamorfismohidrotermal de la Sierra de Cameros (La Rioja-España):Petrología, Geoquímica y Contexto Estructural de losprocesos de interacción fluido-roca. Ph. D. Tesis. Pp. 1-361

Milovanovic, D., Milosavljevic, M., Kalenic, M.,Marchig, V., (1994). Ocurrence of chloritoid andpyrophyllite in metaclastic rocks of Morava Zone.Geologica Balcanica, 24. 3. Pp. 31-38