Mineralogy of Graphite from the Graphite-Bearing Schists of Wadi Lawi, South Eastern Desert, Egypt

作者：Ahmed M. Bishady

摘要：The graphitized schists of Wadi Lawi, South Eastern Desert, Egypt, had been investigated to exhibit the mineralogy of thegraphitic material, and its structural state, to reveal its conditions. The graphite included quartz-plagioclase-actinolite-graphite schistand actinolite-talc-chlorite-graphite schist. It occurs as bundles and laths, showing Rmax in oil from l 0 to 14. Magnetite is the majorassociate with graphite or disposed in the groundmass. XRD, DTA patterns, TEM and TMD investigations of separated graphiticmaterial, show that it ranges in its structure from semi-graphite （graphite-dl） to graphite （full-ordered graphite）. 613 C （PDB） with anaverage of-23.06%o, in addition, the IR investigations for these graphitic materials indicate their organogenic origin. The present authorsuggests the possibility that Wadi Lawi graphitic material is related to post-depositional contaminations. XRD and DTA can alsodeclare that the graphitic materials were formed under conditions ofgreenschist facies in a temperature range of 400 to 600 ℃, under apressure of 4 to 6 kP.

發文機構：Geology Department

關鍵詞：GRAPHITEWADILawiOPHIOLITESMINERALOGYstructuralstate.

分類號： P[天文地球]