Quartz deposition and its influence on the deformation process of megathrusts in subduction zones

Earth, Planets and Space

Table 1 Integrated peak intensities and calculated bulk rock mineral compositions

Sample	Total clay		Quartz		Plagioclase		Calcite		S-I			Chlorite
	Area	wt.%	Area	wt.%	Area	wt.%	Area	wt.%	Area	wt.% in clay fraction*	wt.% in bulk rock**	Area	wt.% in clay fraction	wt.% in bulk rock
ML-01	134	50	1,747	36	333	14	5	Trace	3,183	70	35	2,713	30	15
ML-02	121	45	2,007	39	381	16	22	Trace	2,829	74	33	1,970	26	12

*wt.% of S-I in clay fraction sample estimated by Biscaye's weighting factor.
**wt.% of S-I in bulk sample (=wt.% of total clay in bulk rock × wt.% of S-I in clay fraction).