Thermal Property of Granite in Deep Strata and Its Effect on Thermal Zone of Surrounding Rock

Table 3

The proportion of mineral composition of each group of rock samples.

Depth m	Potassium feldspar％	Plagioclase％	Quartz％	Biotite chlorite％	Epidote％	Muscovite％	Calcite％	Other％
1500	23	36	33	7	Trace			Trace
1600	23	41	30	6				Trace
1700	28	42	24			3	3
1800	23	43	25	8				1
1900	30	37	25	7				1
2000	28	36	32	4				Trace