A coesite inclusion in dolomite in Dabie Shan, China: petrological and rheological significance


Schertl H., Okay A.

European Journal of Mineralogy, vol.6, no.6, pp.995-1000, 1994 (Journal Indexed in SCI Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 6 Issue: 6
  • Publication Date: 1994
  • Doi Number: 10.1127/ejm/6/6/0995
  • Title of Journal : European Journal of Mineralogy
  • Page Numbers: pp.995-1000

Abstract

Coesite partially inverted to quartz occurs as an inclusion within dolomite in a calc-silicate rock in Dabie Shan, China. The calc-silicate rock consists mainly of dolomite, calcite, quartz, and phengite that is partially replaced by phlogopite, plagioclase, and secondary phengite. The calc-silicate intercalated with marble forms an over 8-m-thick band in felsic gneiss. The presence of coesite within dolomite in calc-silicate rocks confirms that sedimentary rocks deposited on continental crust can be subducted to depths of over 100 km, and that even a carbonate mineral like dolomite is able to preserve coesite during the process of eduction. -from Authors