A separation-method for dispersed carbonaceous material in rocks and a calculation-method for Lc(002) are presented, and a numerical expression of the graphitizing-degree is newly proposed revising Tagiri and Tsuboi (1979), Graphitizing-degree=[(d002-3.70)/log (Lc(002)/1000)]×100. Some examples in the metamorphic aureoles are indicated and it has been clearly shown that the graphitization mainly depends on temperature suffered and that it is useful to investigate a geothermal structure.
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Michio Tagiri (1981) studied this question.
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