Boletín de Geología

Vol. 25 No. 40 (2003): Boletín de Geología
Articles

Termocronología K-AR en Illitas: aspectos metodológicos

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  • L. C. Mantilla Figueroa,
L. C. Mantilla Figueroa,
Universidad Industrial de Santander

Published 2003-08-28

Keywords

  • Illites,
  • dating,
  • K-Ar,
  • sedimentary basin,
  • metamorphism

How to Cite

Mantilla Figueroa, L. C. (2003). Termocronología K-AR en Illitas: aspectos metodológicos. Boletín De Geología, 25(40), 11–22. Retrieved from https://revistas.uis.edu.co/index.php/revistaboletindegeologia/article/view/3950
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Abstract

The K-Ar dating methods on illites are an important tool for the study of sedimentary basins, hydrothermal events and low- and very low-grade metamorphic rocks. The granulometric fractions that better register the thermal history are those between 2.0-0.4µm, 0.4-0.2µm and <0.2µm, due its high concentration of newformed illites. A preliminary SEM study of the rocks, and the XRD analysis of each granulometric fraction is fundamental to interpretate the geological meaning of the obtained isotopic data.

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References

Adams, C.J, Bishop, D.G., Gabites, J.E. (1985). Potassium-argon age studies od low-grade, progressively metamophosed greywacke sequence, Dansey Pass, south Island, New Zeland. J. geol. Soc. London. Vol. 142. pp. 339-349.

Alonso- Azacarate, J. (1997). Evolucion de los filosilicatos y genesis de los yacimientos de pirita en la cuenca de cameros, su relacion, con las faices sedimentarias y el metamorfismo creatico. La rioja- soria. Tesis doctoral. Univ. Complutense de Madrid. 544p.