International Geological Journal - Official Journal of the Carpathian-Balkan Geological Association

THE ORIGIN OF GRAPHITE IN THE CRYSTALLINE BASEMENT OF THE WESTERN TATRA MTS. (WESTERN CARPATHIANS, S-POLAND)

Pages: 295 - 303

Authors: ALEKSANDRA GAWEDA, STEFAN CEBULAK

Abstract: Metamorphic rocks with graphite contents from 0.1 wt. % to 4 wt. % were analysed using Oxyreactive Thermal Analysis as a main tool with supporting X-ray and optical methods. Two generations of graphite were found in these rocks: 1. predominant graphite Gph1 of organic origin (graphitized petroleum coke); 2. hydrothermal graphite Gph2, in association with postmagmatic muscovite, albite and quartz. The P-T conditions of final graphitization for Gph1 were assumed as 7.5–10 kbar and 700–780 °C. The hydrothermal graphite precipitation took place at the temperature of 700–730 °C and pressure about 6 kbar and continued during cooling up to 400 °C and 2 kbar of pressure.

Keywords: Western Tatra Mts., shear zones, oxyreactive thermal analysis, graphite

Download PDF document Show Text Version