Applicability of garnet-cordierite (Gt-Crd) geothermometer

Authors

  • Harel Thomas Thomas Department of Applied Geology, School of Engineering & Technology, Dr. Harisingh Gour Vishwavidyalaya, Sagar (MP), 470003, India
  • Haritabh Rana Department of Applied Geology, School of Engineering & Technology, Dr. Harisingh Gour Vishwavidyalaya, Sagar (MP), 470003, India
  • Anju Mishra Department of Applied Geology, School of Engineering & Technology, Dr. Harisingh Gour Vishwavidyalaya, Sagar (MP), 470003, India

DOI:

https://doi.org/10.3126/jngs.v60i0.31271

Keywords:

Garnet, Cordierite, Exchange reaction, Granulite, Comparative study

Abstract

The garnet-cordierite pairs are commonly found in the assemblages of granulites and hence are suitable for estimating equilibrium temperature of these metamorphic rocks. At present, there are many calibrations of garnet - cordierite (Gt-Crd) thermometer that may confuse geologists in choosing a reliable thermometer. To test the accuracy of the garnet - cordierite thermometers, we have applied eleven models formulated by a number of researchers since (1976) till date. We have collected 70 samples from the literature all over the world, which has been processed through “Gt-Crd.EXE” software. Based on the present study, we have identified a set of the best among all the eleven models which were considered under this comparative study. We have concluded that the five garnet-cordierite thermometers are the most valid and reliable of this kind of thermometer (Holdaway and Lee, 1977; Perchuk et al. 1985; Thompson, 1976; Wells,1979 and Aranovich and Podlesskii ,1989).

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Published

2020-09-16

How to Cite

Thomas, H. T., Rana, H., & Mishra, A. (2020). Applicability of garnet-cordierite (Gt-Crd) geothermometer. Journal of Nepal Geological Society, 60, 147–161. https://doi.org/10.3126/jngs.v60i0.31271

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