The quantitative classification of granites and their metallogenetic relations in West Qinling, Gansu Province, China

Figures & data

Figure 1. The distribution diagram of magmatic rocks and significance deposits in the West Qinling area (after Yang et al., 2012).

Table 1. Statistical parameters table of the major oxide from granites in the West Qinling in Gansu Province, China.

Oxide	SiO2	A12O3	K2O	CaO	Fe2O3	FeO	Na2O	MgO	TiO2	MnO	P2O5
Average value	70.91	14.25	4.10	1.66	0.99	1.73	3.79	0.83	0.31	0.08	0.13

Figure 2. Quantitative classification model of granites in West Qinling.

Table 2. Quantitative classification results of granites(oxides) in the West Qinling in Gansu Province, China.

Classification	SiO2	TiO2	A12O3	Fe2O3	FeO	MnO	MgO	CaO	Na2O	K2O	P2O5	Rock mass number	Sample number
Ⅰ	67.98	0.46	14.44	3.02	2.46	0.06	1.79	2.98	3.63	3.01	0.12	4	5
Ⅱ1	71.83	0.28	13.93	1.56	1.05	0.05	0.56	1.58	3.61	3.69	0.11	32	39
Ⅱ2	73.93	0.23	12.85	0.79	1.80	0.05	0.34	0.93	3.16	4.83	0.06	11	13
Ⅱ31	73.05	0.11	12.86	1.58	1.51	0.03	0.23	0.40	3.77	5.33	0.05	2	3
Ⅱ32	73.56	0.15	13.85	0.55	1.26	0.06	0.33	0.80	3.96	4.53	0.07	42	56
Ⅲ1	69.47	0.38	14.50	1.16	1.80	0.13	1.03	1.81	4.01	4.09	0.16	41	60
Ⅲ21	70.83	0.34	14.68	0.60	2.13	0.06	0.69	1.37	4.27	4.22	0.11	8	12
Ⅲ22	71.45	0.28	14.16	0.46	1.53	0.12	0.82	1.16	3.44	3.61	0.11	6	7

Table 3. Quantitative classification results of granites with ore deposits spatial correlation statistical analysis.

Quantitative classification	Unit	Ⅰ	Ⅱ				Ⅲ			Total
			Ⅱ1	Ⅱ2	Ⅱ31	Ⅱ32	Ⅲ1	Ⅲ21	Ⅲ22
Granite body	PC	4	32	11	2	42	41	8	6	146
Proportion of total granite body	%	2.70	21.91	7.53	1.37	28.77	28.08	5.48	4.11	100
Gold mineralization-related granite body	PC	1	4	4	–	1	22	1	–	34
Gold deposits	PC	3	22	28	–	1	41	1	–	96
Copper mineralization-related granite body	PC	1	1	2	–	–	7	–	–	11
Copper deposits	PC	1	1	3	–	–	14	–	–	19
Lead–zinc mineralization related granite body	PC	1	3	1	1	2	4	–	–	12
Lead–zinc deposits	PC	1	14	1	1	2	12	–	–	31

The PC is the quantity unit.

Figure 3. Quantitative classification model of granites and ore-forming granites in West Qinling.

Yang, T., Zhu, L. M., Zhang, G. W., Wang, F., Lu, R. K., Xia, J. C., & Zhang, Y. Q. (2012). Geological and geochemical constraints on genesis of the Liziyuan gold-dominated polymetal deposit, western Qinling orogen, central China. International Geology Review, 54(16), 1944–1966.

 Web of Science ®Google Scholar