元素比值在嫩江—黑河地区金成矿预测的应用初探

doi:10.11872/j.issn.1005-2518.2022.06.185

Abstract

Abstract:

In order to explore the application of element ratio in gold metallogenic prediction，based on the collection of 1∶250 000 regional geochemical exploration data in Nenjiang-Heihe area，the data were standardized with the abundance of upper crust，and the ratios of Au to front halo elements and tail halo elements and the ratios of front halo elements to tail halo elements were calculated.Then，the geochemical parameters of each element and the ratios of characteristic elements were counted，their geochemical characteristics were analyzed.The geochemical contour map of Au and the ratios of characteristic elements at a logarithmic interval of （0.1~0.2） lgC was drawn，and the distribution characteristics of them were summarized.Finally，combined with the distribution law of existing gold deposits and the distribution characteristics of gold deposits on the geochemical isoline map of various variables，we delineated the prospecting target area.The results show that after the dimensionality is eliminated by standardization，the average value range of characteristic element ratios is 0.60~15.58，with little difference，which is convenient for statistical analysis and geochemical isoline drawing.And the spatial distribution characteristics of characteristic element ratios are closely related to the distribution of existing gold deposits.Their high background and high value areas have obvious northeast and northwest distribution trends，and some have north-south and east-west distribution trends，it is consistent with the distribution direction of existing gold mines.According to the distribution characteristics of existing gold deposits on the geochemical contour map of Au and the ratios of the characteristic element，a total of 7 metallogenic targets are delineated.The study shows that the element ratio has achieved a certain effect in the prediction of gold mineralization，which provides a scientific basis for the search for gold deposits in Nenjiang-Heihe area and a new idea for the study of new prospecting methods.

Key words: element ratio, gold mine, metallogenic prediction, geochemical method, regional prospecting, Nenjiang-Heihe area

CLC Number:

P618.51

Anzong FU,Xinlang YU,Chenglu LI,Wenpeng YANG,Yuanjiang YANG,Bo ZHENG,Ruijun ZHAO. Application of Element Ratios in Gold Metallogenic Prediction in Nenjiang-Heihe Area[J].Gold Science and Technology, 2022, 30(6): 822-834.

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元素（氧化物）	算术均值	均方差	变化系数	上地壳丰度	浓度克拉克值	元素（氧化物）	算术均值	均方差	变化系数	上地壳丰度	浓度克拉克值
Au	1.66	28.80	17.32	0.74	2.25	Mn	1 125.67	1 606.13	1.43	575	1.96
Ag	0.06	0.05	0.83	0.055	1.03	Nb	8.33	5.35	0.64	12	0.69
As	12.10	20.88	1.73	1.9	6.37	Ni	12.85	17.16	1.34	24	0.54
Sb	0.58	1.10	1.89	0.18	3.22	P	676.17	729.73	1.08	590	1.15
Bi	0.16	0.33	2.08	0.13	1.21	Pb	22.94	17.92	0.78	17	1.35
Hg	0.03	0.23	9.24	0.0078	3.22	Sr	263.57	174.05	0.66	330	0.80
W	0.95	1.20	1.27	0.9	1.05	Th	5.39	2.76	0.51	8.6	0.63
Mo	1.12	1.32	1.18	0.6	1.87	Ti	2 149.51	1 940.77	0.90	3 000	0.72
F	273.69	193.07	0.71	540	0.51	V	58.48	58.90	1.01	68	0.86
Cd	0.06	0.08	1.23	0.072	0.88	Y	12.41	7.85	0.63	17	0.73
Sn	1.64	0.94	0.57	1.5	1.09	Zn	35.30	27.80	0.79	60	0.59
B	14.18	16.21	1.14	17	0.83	Zr	132.98	92.37	0.69	162	0.82
Li	15.52	10.84	0.70	16	0.97	SiO₂	72.00	7.76	0.11	61.77	1.17
Be	1.89	0.71	0.38	1.6	1.18	Al₂O₃	11.86	2.49	0.21	13.61	0.87
U	1.39	0.87	0.62	1.5	0.93	TFe₂O₃	3.60	3.30	0.91	4.78	0.75
Ba	703.68	317.22	0.45	740	0.95	K₂O	3.14	0.85	0.27	3.06	1.03
Co	16.47	22.99	1.40	12	1.37	Na₂O	2.20	0.96	0.43	2.96	0.74
Cr	23.63	33.89	1.43	52	0.45	CaO	1.11	0.91	0.82	5.6	0.20
Cu	10.34	47.92	4.63	18	0.57	MgO	0.66	0.71	1.08	2.73	0.24
La	18.11	10.42	0.58	35	0.52

特征元素比值	算术均值	均方差	变化系数	特征元素比值	算术均值	均方差	变化系数
Au/As	0.60	4.81	7.96	As/Ni	15.58	18.09	1.16
Au/Sb	1.01	17.71	17.61	Sb/Bi	3.01	4.23	1.41
Au/Hg	1.86	64.95	34.87	Sb/Mn	2.64	4.65	1.76
Au/Bi	1.98	24.67	12.46	Sb/Co	3.57	5.08	1.42
Au/Mn	2.28	30.12	13.20	Sb/Ni	8.85	13.70	1.55
Au/Co	3.17	47.09	14.87	Hg/Bi	3.86	32.50	8.43
Au/Ni	7.17	90.37	12.61	Hg/Mn	4.59	32.47	7.07
As/Bi	6.01	7.96	1.33	Hg/Co	5.86	47.95	8.19
As/Mn	4.35	5.55	1.28	Hg/Ni	13.15	79.95	6.08
As/Co	6.07	7.81	1.29

Application of Element Ratios in Gold Metallogenic Prediction in Nenjiang-Heihe Area

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