青海省都兰县丘吉东沟金矿水系沉积物地球化学特征及找矿远景

doi:10.11872/j.issn.1005-2518.2020.06.084

Abstract

Abstract:

The Qiujidonggou gold deposit in Dulan County is located in the middle of the east Kunlun metallogenic province，so it is necessary to carry out research on the reverse side of mineral exploration.The area has developed structures，frequent research activities，and a good metallogenic geological background.There are famous Wulonggou gold deposit and Tanjianshan gold deposit around the mine.Due to the good metallogenic background in this area，the area has attracted the attention of scholars at home and abroad.Most of the previous studies have focused on the geological characteristics of the deposits and the metallogenic age，and there are few studies on regional mineral exploration，which has led to no breakthrough in regional prospecting. Because the mining area is large and the coverage is serious，general physical and chemical exploration methods are difficult to meet the exploration needs，which limits the prospecting and mining work of the mine.In order to reveal the metallogenic characteristics of the ore bodies in the study area and the prospecting direction，this paper explores the 1∶25 000 water system sediments in the Qiujidonggou gold deposit，to explore the mineralization characteristics and delineation of the deposit mine target area.Through research，it is found that the four elements Ag，Pb，As and Sb are highly correlated with metallogenic elements and can be used as indicator elements for metallogenic.Using the method of contrast anomaly delineation，four comprehensive anomalies were delineated in the study area.One type I anomaly is the AS-4 comprehensive anomaly and the second type anomaly is the AS-1 and AS-3 anomalies，third type anomaly is the AS-2 anomalies.This will provide a theoretical basis for the theoretical research and prospecting direction of regional prospecting.

Key words: stream sediment survey, geochemical characteristics, contrast anomaly delineation method, east Kunlun metallogenic province, Qiujidonggou gold deposit, Qinghai Province

CLC Number:

P632

Ming LIU,Zizhang WANG. Geochemical Characteristics of Stream Sendiments and Exploration Prospective of the Qiujidonggou Gold Deposit in Dulan County，Qinghai Province[J].Gold Science and Technology, 2020, 28(6): 837-845.

Figures/Tables 5

Fig.1

Fig.2

Table 1

Table 2

Statistical of basic geochemical parameters of geochemical anomaly of stream sediments"

异常编号	异常元素	异常点数	异常下限（T）	峰值（C_max）	异常均值（ $C a ˉ$ ）	标准离差（δ）	面积（S） /km²	衬度 K== $C a ˉ T$	异常规模 D=K·S
AS-1	Mo	26	2.30	5.1	2.72	0.55	0.45	0.75	0.34
	Cd	17	0.35	1.20	0.48	0.08	0.38	0.80	0.30
	Te	14	0.09	0.14	0.11	0.02	0.20	0.81	0.16
	Cu	11	55.00	118.00	63.88	14.37	0.038	0.80	0.03
	Au	11	2.30	3.00	2.76	0.57	0.063	0.77	0.05
AS-2	Mo	20	2.30	5.40	2.65	0.55	0.92	1.15	1.06
	Sb	16	1.80	2.70	1.81	0.38	0.56	1.01	0.57
	As	22	22.00	126.00	44.15	5.04	1.94	2.01	3.90
	Au	15	2.30	6.40	2.75	0.57	1.19	1.20	1.43
	Ag	8	0.15	0.23	0.18	0.02	0.73	1.20	0.88
	Bi	9	0.43	1.30	0.68	0.09	0.68	1.58	1.07
	W	14	3.00	22.2	4.67	0.69	0.57	1.56	0.89
	Cd	14	0.35	0.62	0.43	0.08	1.23	1.23	1.51
	Pb	13	28.00	52.3	34.59	4.29	1.22	1.24	1.51
	Zn	4	105.00	112.00	105.5	21.40	0.02	1.01	0.02
	Sn	3	4.40	5.50	5.07	0.73	0.42	1.15	0.48
AS-3	Au	10	2.30	39.1	5.43	0.55	0.61	2.36	1.44
	As	9	22.00	497.00	72.01	5.04	0.64	3.27	2.09
	Hg	11	0.05	0.70	0.15	0.02	0.58	3.00	1.74
	Sb	1	1.80	2.30	2.30	0.38	0.014	1.28	0.02
	Cu	16	55.00	92.4	62.68	14.37	0.34	1.14	0.39
	Co	16	24.00	38.00	29.3	5.28	0.60	1.22	0.73
	Ni	16	58.00	97.10	68.25	13.18	0.563	1.18	0.66
	Ti	24	6 300.00	8 894.00	7 108.25	1 407.36	0.54	1.13	0.61
	V	18	150.0	220.00	162.27	31.23	0.33	1.08	0.36
AS-4	Au	8	2.30	5.60	3.45	0.55	0.49	1.80	0.88
	Ag	32	0.15	13.10	0.85	0.02	1.15	5.67	6.52
	Pb	34	28.00	769.00	69.16	4.29	1.31	2.47	3.24
	Zn	18	105.00	309.00	122.16	21.40	1.04	1.16	1.21
	W	53	3.00	71.30	6.54	0.69	2.06	2.18	4.49
	Mo	15	2.30	9.30	3.21	0.55	0.45	1.40	0.63
	Cu	3	55.00	154.00	100.73	14.37	0.16	1.83	0.30
	Sb	12	1.80	10.2	2.93	0.38	0.67	1.63	1.09
	Cd	36	0.35	2.60	0.74	0.08	1.71	2.11	3.61
	Ni	3	58.00	136.00	88.73	13.18	0.11	1.53	0.17
	As	6	22.00	110.00	48.38	5.04	0.65	2.20	1.43
	Sn	2	4.4	5.3	5.2	0.73	0.04	1.18	0.05

Table 2

Fig.3

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Geochemical Characteristics of Stream Sendiments and Exploration Prospective of the Qiujidonggou Gold Deposit in Dulan County，Qinghai Province

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元素	对数平均值	对数标准差	对数异常下限	异常下限反算	全区元素均值	最终异常下限
Au	0.03	0.22	0.47	2.35	1.41	2.30
Ag	-1.20	0.14	-0.92	0.11	0.07	0.15
Cu	1.38	0.20	1.78	55.52	26.78	55.00
Pb	1.23	0.11	1.45	25.97	17.38	28.00
Zn	1.81	0.14	2.09	110.00	67.20	105.00
As	1.06	0.18	1.42	22.51	12.43	22.00
Sb	0.03	0.14	0.31	1.88	1.13	1.80
Hg	-1.71	0.26	-1.19	0.06	0.02	0.05
W	0.17	0.19	0.55	3.01	1.62	3.00
Sn	0.46	0.11	0.68	4.44	2.99	4.40
Mo	0.03	0.18	0.39	2.28	1.18	2.30
Ni	1.47	0.17	1.81	58.23	31.86	58.00
Bi	-0.61	0.15	-0.31	0.43	0.26	0.43
V	1.93	0.14	2.21	151.36	88.91	150.00
Co	1.08	0.16	1.40	23.50	12.95	24.00
Ti	3.52	0.17	3.86	6 384.11	3 569.39	6 300.00
Cd	-0.72	0.16	0.40	0.36	0.20	0.35
Ba	2.69	0.14	2.97	881.79	512.35	880.00
Te	-1.21	0.14	-0.93	0.10	0.06	0.09
Y	1.39	0.11	1.61	37.24	25.17	38.00