Mechanical-Chemical-Mineralogical Controls on Permeability Evolution of Shale Fractures

Table 1

Detailed mineralogical compositions (wt%) of each samples.

Mineral category	Mineral name	Longmaxi shale		Green River shale		Marcellus shale
Tectosilicate	Quartz	51.6	55.3	14.9	45.9	36.1	36.1
	Analcime	0		16.7		0
	Anorthite	0		7.8		0
	Albite	3.7		0		0
	Microcline	0		6.5		0
Carbonate	Dolomite	3.4	20.1	39.4	51.8	0	0
	Calcite	16.7		12.4		0
Phyllosilicate	Muscovite	0	24.6	0	2.3	10.4	63.9
	Illite	24.6		2.3		37.4
	Chlorite	0		0		0
	Kaolinite	0		0		4.9
	Montmorillonite	0		0		11.2
Total		100	100	100	100	100	100