Geochemical Characteristics of Stream Sediments and Prospecting Implications in Shangri-La Wengshui Area, NW Yunnan

doi:10.19657/j.geoscience.1000-8527.2020.58

Abstract

Abstract:

The Wengshui area is located in the southern Yidun Arc (NW Yunnan) and belongs to the Shangri-La arc-type porphyry Cu-Mo-W metallogenic belt. This area has good prospecting potential for polymetallic deposits such as Mo, W, Pb and Zn, where the large Xiuwacu Mo-W deposit and many other ore deposits/occurrences have been discovered. The 1∶50,000 stream sediment survey shows that the contents of Cu, W, Pb, Zn, Sn, As, Sb, Bi, Co and Ni at Wengshui are significantly higher than those in the average Sanjiang metallogenic belt, SW China. The element anomalies are clearly controlled by structure and lithology. Gold is mainly enriched in T₃lm ³; W, Mo and Bi are enriched in monzonitic granite pluton; and Pb, Zn are enriched in T₃t ². According to the spatial distributions of element anomalies and metallogenic conditions, we have delineated 29 integrated geochemical anomalies, and two prospecting targets including the Xiuwacu Mo-W Grade-A target and the Momoya Pb-Zn-Ag Grade-B target. This provides direction and important reference for further prospecting work.

Key words: stream sediment, geochemistry, target prospecting, Wengshui, Yidun Arc

CLC Number:

HUANG Yonggao, XIONG Changli, LUO Gai, ZHANG Tong, JIA Xiaochuan, YANG Xuejun, YE Chunlin, WANG Yi. Geochemical Characteristics of Stream Sediments and Prospecting Implications in Shangri-La Wengshui Area, NW Yunnan[J]. Geoscience, 2020, 34(05): 897-907.

Figures/Tables 12

References 27

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参数		Au	Ag	Sn	As	Sb	Bi	Hg	W	Mo	Cu	Pb	Zn	Co	Ni	Cd
原始数据	Max₀	485.00	19.60	24.10	671.00	167.00	68.30	1.91	518.00	8 500.00	966.00	15 720.00	3 144.00	70.87	545.00	15.20
	Min₀	0.40	0.04	1.40	0.54	0.10	0.05	0.01	0.30	0.20	1.61	4.41	6.72	1.00	3.00	0.05
	X₀	1.85	0.14	3.72	30.09	1.76	0.79	0.04	4.60	7.30	36.12	53.45	104.55	16.76	38.61	0.24
	S₀	12.56	0.49	1.41	47.78	4.53	2.49	0.05	17.31	197.63	46.18	379.94	95.92	6.82	34.33	0.46
	Cv₀	6.79	3.50	0.38	1.59	2.57	3.15	1.25	3.76	27.07	1.28	7.11	0.92	0.41	0.89	1.92
剔除离群数据	Max	2.55	0.15	5.70	47.05	2.90	0.96	0.08	4.37	1.63	65.63	58.50	190.90	32.81	80.19	0.47
	Min	0.40	0.04	1.40	0.54	0.10	0.05	0.01	0.30	0.20	1.61	4.41	6.72	1.00	3.00	0.05
	X	1.15	0.09	3.51	18.12	1.10	0.47	0.03	2.30	0.78	28.54	30.77	96.06	16.33	35.11	0.18
	S	0.47	0.02	0.76	9.65	0.61	0.17	0.02	0.69	0.29	12.37	9.40	32.22	5.66	15.19	0.10
	Cv	0.41	0.22	0.22	0.53	0.55	0.36	0.67	0.30	0.37	0.43	0.31	0.34	0.35	0.43	0.56
	K	0.88	1.13	1.21	1.51	1.38	1.57	1.00	1.35	1.11	1.23	1.32	1.34	1.26	1.30	1.20
	D	0.34	1.29	2.06	8.24	2.20	130.56	0.33	2.09	0.65	0.53	2.37	1.13	0.82	0.49	1.29
西南三江成矿带水系沉积物背景值		1.27	1.30	0.08	2.90	12.00	0.80	0.30	0.03	1.70	0.70	23	23	72	13.00	27.00
大陆岩石圈丰度		3.40	3.40	0.07	1.70	2.20	0.50	0	0.09	1.10	1.20	54	13	85	20	71

参数		Au	Ag	Sn	As	Sb	Bi	Hg	W	Mo	Cu	Pb	Zn	Co	Ni	Cd
原始数据	Max₀	485.00	19.60	24.10	671.00	167.00	68.30	1.91	518.00	8 500.00	966.00	15 720.00	3 144.00	70.87	545.00	15.20
	Min₀	0.40	0.04	1.40	0.54	0.10	0.05	0.01	0.30	0.20	1.61	4.41	6.72	1.00	3.00	0.05
	X₀	1.85	0.14	3.72	30.09	1.76	0.79	0.04	4.60	7.30	36.12	53.45	104.55	16.76	38.61	0.24
	S₀	12.56	0.49	1.41	47.78	4.53	2.49	0.05	17.31	197.63	46.18	379.94	95.92	6.82	34.33	0.46
	Cv₀	6.79	3.50	0.38	1.59	2.57	3.15	1.25	3.76	27.07	1.28	7.11	0.92	0.41	0.89	1.92
剔除离群数据	Max	2.55	0.15	5.70	47.05	2.90	0.96	0.08	4.37	1.63	65.63	58.50	190.90	32.81	80.19	0.47
	Min	0.40	0.04	1.40	0.54	0.10	0.05	0.01	0.30	0.20	1.61	4.41	6.72	1.00	3.00	0.05
	X	1.15	0.09	3.51	18.12	1.10	0.47	0.03	2.30	0.78	28.54	30.77	96.06	16.33	35.11	0.18
	S	0.47	0.02	0.76	9.65	0.61	0.17	0.02	0.69	0.29	12.37	9.40	32.22	5.66	15.19	0.10
	Cv	0.41	0.22	0.22	0.53	0.55	0.36	0.67	0.30	0.37	0.43	0.31	0.34	0.35	0.43	0.56
	K	0.88	1.13	1.21	1.51	1.38	1.57	1.00	1.35	1.11	1.23	1.32	1.34	1.26	1.30	1.20
	D	0.34	1.29	2.06	8.24	2.20	130.56	0.33	2.09	0.65	0.53	2.37	1.13	0.82	0.49	1.29
西南三江成矿带水系沉积物背景值		1.27	1.30	0.08	2.90	12.00	0.80	0.30	0.03	1.70	0.70	23	23	72	13.00	27.00
大陆岩石圈丰度		3.40	3.40	0.07	1.70	2.20	0.50	0	0.09	1.10	1.20	54	13	85	20	71

地质单元	参数	Au	Ag	Sn	As	Sb	Bi	Hg	W	Mo	Cu	Pb	Zn	Co	Ni	Cd
T₃ha	T	3.30	0.17	4.85	37.30	3.68	0.76	0.09	3.06	1.67	60.48	43.71	146.99	28.09	73.65	0.53
	X	1.54	0.10	3.30	18.82	1.32	0.44	0.04	1.86	0.88	32.44	25.32	101.84	16.79	54.53	0.27
	q	1.34	1.11	0.94	1.04	1.20	0.94	1.33	0.81	1.13	1.14	0.82	1.06	1.03	1.55	1.50
T₃lm³	T	6.00	0.19	9.67	314.39	8.34	6.06	0.11	20.55	7.04	305.55	51.86	141.18	26.53	60.10	0.51
	X	7.35	0.23	5.91	86.90	3.04	2.63	0.04	11.90	5.17	96.56	58.08	115.62	20.08	38.94	0.36
	q	6.39	2.56	1.68	4.80	2.76	5.60	1.33	5.17	6.63	3.38	1.89	1.20	1.23	1.11	2.00
T₃lm²	T	2.06	0.19	5.95	57.90	2.55	0.79	0.10	3.65	1.23	45.56	57.54	152.51	24.77	53.65	0.48
	X	0.46	0.06	2.40	4.04	0.36	0.13	0.01	1.52	0.23	6.16	14.40	19.50	6.66	4.96	0.05
	q	0.40	0.67	0.68	0.22	0.33	0.28	0.33	0.66	0.29	0.22	0.47	0.20	0.41	0.14	0.28
T₃lm¹	T	1.88	0.12	5.24	42.82	2.62	0.77	0.06	3.08	1.12	49.27	50.21	136.12	25.49	55.60	0.39
	X	1.18	0.11	3.80	20.76	1.17	0.52	0.03	2.74	4.31	30.95	38.54	97.07	17.12	35.80	0.20
	q	1.03	1.22	1.08	1.15	1.06	1.11	1.00	1.19	5.53	1.08	1.25	1.01	1.05	1.02	1.11
T₃t²	T	2.20	0.26	4.60	92.22	4.63	0.74	0.08	4.26	1.72	56.00	52.81	164.87	27.19	60.04	0.49
	X	1.75	0.18	3.45	36.19	2.40	0.60	0.03	2.95	1.10	31.94	93.29	118.16	17.49	32.46	0.25
	q	1.52	2.00	0.98	2.00	2.18	1.28	1.00	1.28	1.41	1.12	3.03	1.23	1.07	0.92	1.39
T₃t¹	T	2.57	0.22	4.26	44.84	2.49	0.68	0.06	3.09	1.21	38.70	40.44	156.63	22.73	63.98	0.31
	X	1.51	0.11	3.24	20.08	1.29	0.49	0.04	2.17	0.86	27.85	31.34	106.67	17.20	41.49	0.19
	q	1.31	1.22	0.92	1.11	1.17	1.04	1.33	0.94	1.10	0.98	1.02	1.11	1.05	1.18	1.06
ηγ	T	3.44	0.37	8.24	150.99	5.65	13.40	0.06	106.90	104.10	144.91	49.12	139.70	16.49	33.83	0.50
	X	0.74	0.11	3.40	19.28	1.11	3.13	0.02	28.80	12.43	36.10	25.50	26.57	3.22	6.03	0.10
	q	0.64	1.22	0.97	1.06	1.00	6.65	0.50	12.52	15.94	1.26	0.83	0.28	0.20	0.17	0.56

地质单元	参数	Au	Ag	Sn	As	Sb	Bi	Hg	W	Mo	Cu	Pb	Zn	Co	Ni	Cd
T₃ha	T	3.30	0.17	4.85	37.30	3.68	0.76	0.09	3.06	1.67	60.48	43.71	146.99	28.09	73.65	0.53
	X	1.54	0.10	3.30	18.82	1.32	0.44	0.04	1.86	0.88	32.44	25.32	101.84	16.79	54.53	0.27
	q	1.34	1.11	0.94	1.04	1.20	0.94	1.33	0.81	1.13	1.14	0.82	1.06	1.03	1.55	1.50
T₃lm³	T	6.00	0.19	9.67	314.39	8.34	6.06	0.11	20.55	7.04	305.55	51.86	141.18	26.53	60.10	0.51
	X	7.35	0.23	5.91	86.90	3.04	2.63	0.04	11.90	5.17	96.56	58.08	115.62	20.08	38.94	0.36
	q	6.39	2.56	1.68	4.80	2.76	5.60	1.33	5.17	6.63	3.38	1.89	1.20	1.23	1.11	2.00
T₃lm²	T	2.06	0.19	5.95	57.90	2.55	0.79	0.10	3.65	1.23	45.56	57.54	152.51	24.77	53.65	0.48
	X	0.46	0.06	2.40	4.04	0.36	0.13	0.01	1.52	0.23	6.16	14.40	19.50	6.66	4.96	0.05
	q	0.40	0.67	0.68	0.22	0.33	0.28	0.33	0.66	0.29	0.22	0.47	0.20	0.41	0.14	0.28
T₃lm¹	T	1.88	0.12	5.24	42.82	2.62	0.77	0.06	3.08	1.12	49.27	50.21	136.12	25.49	55.60	0.39
	X	1.18	0.11	3.80	20.76	1.17	0.52	0.03	2.74	4.31	30.95	38.54	97.07	17.12	35.80	0.20
	q	1.03	1.22	1.08	1.15	1.06	1.11	1.00	1.19	5.53	1.08	1.25	1.01	1.05	1.02	1.11
T₃t²	T	2.20	0.26	4.60	92.22	4.63	0.74	0.08	4.26	1.72	56.00	52.81	164.87	27.19	60.04	0.49
	X	1.75	0.18	3.45	36.19	2.40	0.60	0.03	2.95	1.10	31.94	93.29	118.16	17.49	32.46	0.25
	q	1.52	2.00	0.98	2.00	2.18	1.28	1.00	1.28	1.41	1.12	3.03	1.23	1.07	0.92	1.39
T₃t¹	T	2.57	0.22	4.26	44.84	2.49	0.68	0.06	3.09	1.21	38.70	40.44	156.63	22.73	63.98	0.31
	X	1.51	0.11	3.24	20.08	1.29	0.49	0.04	2.17	0.86	27.85	31.34	106.67	17.20	41.49	0.19
	q	1.31	1.22	0.92	1.11	1.17	1.04	1.33	0.94	1.10	0.98	1.02	1.11	1.05	1.18	1.06
ηγ	T	3.44	0.37	8.24	150.99	5.65	13.40	0.06	106.90	104.10	144.91	49.12	139.70	16.49	33.83	0.50
	X	0.74	0.11	3.40	19.28	1.11	3.13	0.02	28.80	12.43	36.10	25.50	26.57	3.22	6.03	0.10
	q	0.64	1.22	0.97	1.06	1.00	6.65	0.50	12.52	15.94	1.26	0.83	0.28	0.20	0.17	0.56

异常编号	异常名称	异常面积/km²	元素组合表达式	异常分类	评序
AS16	白莱	9.11	^119.35Pb-^86.79Au-^37.82Bi-^28.47Ag-^19.67Sb-^16.74Zn-^12.66Cd -^5.59W-^4.75As-^4.02Cu-^1.17Sn-^1.1Co	甲₁	1
AS22	布斯	10.26	^105.38Au-^26.89Pb-^23.14Ag-^13.92Cd-¹⁰Bi-^8.16Zn -^7.71Mo-^6.15W-^2.04As-^1.91Sn-^1.25Co-^0.42Hg	甲₁	2
AS26	磨莫亚	16.32	^66.91Pb-^19.7Mo-^12.15Ag-^11.92Zn-^11.31Cd -^8.63Bi-^5.28Au-^4.91W-^1.59Cu-^1.38Sb	乙₂	3
AS21	益延	7.10	^52.11Mo-^10.65Pb-^6.11W-^5.91Ag-^4.04Au-^3.21Cu-^2.1Sn-^0.31Ni	甲₁	4
AS11	派仲	9.24	^20.46Hg-^13.68Ni-^5.81As-^3.65Au-^2.37Co-^2.2Sb-^1.46Cu	乙₃	5
AS15	比鲁古郎	2.41	^24.87Pb-^11.35Zn-^7.62Ag	乙₃	6
AS14	日木永铅	9.57	^13.1Pb-^13.04Ag-^2.28As-^2.12Mo-^2.02Sb-^1.45Au-^1.01W	乙₃	7
AS28	磨莫亚东	2.33	^12.52Pb-^4.92Cd-^2.33Ag-^0.87Bi	乙₃	8
AS23	色师	5.11	⁹Ni-^3.88Co-^2.68Mo-^1.53Ag-^1.26Cu	丙₁	9
AS24	色卜池	3.49	^3.9Mo-^2.49Ni-^1.78Ag-^1.74Zn-^1.72Cd-^1.67Cd-^1.39Sb-^0.68Cu	丙₁	10
AS01	央高北西	2.38	^5.75Ag-^4.66Cd-^3.25Bi-^0.64Hg	丙₁	11
AS02	铁来垭	5.97	^4.55Sb-^3.18Cd-^3.06Ag-^1.19As-¹Hg	乙₃	12
AS08	央日永北	3.42	^3.33W-³Co-^1.72Cu-^1.57Au-^1.57Bi-^1.13Sb-^1.02Ni	乙₃	13
AS29	洛益南	4.96	^6.27W-^2.69Cu-^0.64Bi-^0.13Mo	乙₃	14
AS13	日木永北铅	1.42	^3.4Pb-^2.43Ag-^1.91Cd-^1.26As-^0.46Sn	乙₃	15
AS07	雄热萨南	1.81	^9.03Sb-^0.43Cu	丙₁	16
AS03	翁水村	1.95	^6.73Ag-^1.19As	丙₁	17
AS09	益延北	3.39	^2.26W-^2.12Bi-²Ag-^0.94Cu	甲₁	18
AS06	雄热萨	2.00	^2.03Sn-^1.8Cd-^1.47As-^1.26Pb	丙₁	19
AS05	雄热萨西	1.37	^2.8Pb-^2.63Cd-^0.77As-^0.31Ag	丙₁	20
AS20	达延嘎杂北西	3.02	^3.16Au-^1.42Cu-^1.41Sb-^0.16Bi	丙₁	21
AS12	达波北东	1.03	^4.69Au-^0.67Sn	丙₁	22
AS25	打坠	2.12	^2.03W-^1.68Sb-^0.73Pb-^0.33Cu	乙₃	23
AS27	磨莫亚北	0.55	^3.63Mo	丙₁	24
AS04	杰底	1.10	^1.35Au-^1.05Sb-^0.65As	丙₁	25
AS19	达吉牛场	1.73	^0.98Cu-^0.92Au-^0.71Bi	丙₁	26
AS18	乌休牛场	1.31	^1.41Au-^0.65Ni	丙₁	27
AS10	泽央仲	1.14	^1.32Au-^0.56Sb	丙₁	28
AS17	达延格礼北西	1.46	^0.4Bi-^0.24Co	丙₁	29