Geochemical Characteristics and Prospecting Indication of Ore-bearing Rocks in the Hongtoushan Copper-zinc Deposit, Liaoning

doi:10.19657/j.geoscience.1000-8527.2022.01.32

Abstract

Abstract:

The Hongtoushan copper-zinc deposit, located in the Archean greenstone belt, is a massive sulfide deposit. The ore-bearing rocks are composed of hornblende plagiogneiss, hornblende (quartz) plagiogneiss, biotite plagiogneiss, biotite (quartz) plagiogneiss, and biotite quartz gneiss. It suggests that protoliths of these metamorphic rocks are volcanic rocks based on protolith restoration and discrimination of tectonic environment. Among them, protoliths of the hornblende plagiogneiss and hornblende (quartz) plagiogneiss are basic volcanic rocks, whereas protoliths of the biotite plagiogneiss, biotite (quartz) plagiogneiss, and biotite quartz gneiss are intermediate-acid volcanic rocks, together they were the products of the bimodal volcanics. In order to best reveal the possibility of geochemical parameters of the ore-bearing rocks as prospecting indicators, based on the major elements, rare earth elements and trace elements of the ore-bearing rocks, the authors found that the Cu (290.82 μg/g), SiO₂ (57.24%), total rare earth elements (ΣREE) concentration (53.78 μg/g), and LREE/HREE ratio (4.29) of the hornblende (quartz) plagiogneiss, while the Cu (88.09 μg/g ) and SiO₂ (70.50%) concentrations of the biotite (quartz) plagiogneiss and biotite quartz gneiss can be used as important prospecting indicators for the Hongtoushan copper-zinc deposit.

Key words: the Hongtoushan copper-zinc deposit, major, trace and rare earth elements, protolith restoration, tectonic environment, prospecting indicator

CLC Number:

P618.4

WU Xiaolei, CHANG Jinyang, ZENG Nanshi, XU Wenjie, TAO Mingrong, ZHAO Gang, HAN Jian. Geochemical Characteristics and Prospecting Indication of Ore-bearing Rocks in the Hongtoushan Copper-zinc Deposit, Liaoning[J]. Geoscience, 2022, 36(01): 362-377.

Figures/Tables 17

References 47

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样品编号	样品类型	样品名称	采样位置
H2	A	角闪斜长片麻岩	13 m中段14#穿脉
H7			-527 m中段45#穿脉
H8			-647 m中段44#穿脉
H9			-767 m中段24#穿脉
H14			-767 m中段42#穿脉
H13	B	角闪斜长(石英)片麻岩	-767 m中段24#穿脉
H18	C	黑云斜长片麻岩	-767 m中段24#穿脉
H3	D	黑云斜长(石英)片麻岩	13 m中段14#穿脉
H4	D	黑云斜长(石英)片麻岩	13 m中段14#穿脉
H15	E	黑云石英片麻岩	-767 m中段42#穿脉
H16	E	黑云石英片麻岩	-767 m中段42#穿脉

样品编号	样品类型	样品名称	采样位置
H2	A	角闪斜长片麻岩	13 m中段14#穿脉
H7			-527 m中段45#穿脉
H8			-647 m中段44#穿脉
H9			-767 m中段24#穿脉
H14			-767 m中段42#穿脉
H13	B	角闪斜长(石英)片麻岩	-767 m中段24#穿脉
H18	C	黑云斜长片麻岩	-767 m中段24#穿脉
H3	D	黑云斜长(石英)片麻岩	13 m中段14#穿脉
H4	D	黑云斜长(石英)片麻岩	13 m中段14#穿脉
H15	E	黑云石英片麻岩	-767 m中段42#穿脉
H16	E	黑云石英片麻岩	-767 m中段42#穿脉

样号	样品类型	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	烧失量	总和	资料来源
H2	A	55.01	0.54	16.91	8.78	0.16	4.89	9.38	3.42	0.45	0.12	0.78	100.42	本文
H7		54.00	0.68	15.82	11.22	0.15	6.72	6.61	3.27	0.51	0.17	1.01	100.15
H8		51.93	0.60	16.52	9.50	0.17	6.01	8.47	3.93	1.17	0.14	1.94	100.40
H9		56.15	0.51	16.07	8.71	0.16	6.09	7.57	3.75	0.70	0.12	0.71	100.53
H14		48.90	0.35	17.44	10.06	0.18	8.20	10.62	2.34	0.64	0.07	1.25	100.05
H13	B	59.19	0.45	10.75	11.14	0.34	6.65	7.08	0.81	0.65	0.06	2.35	99.47	本文郑远川等^[11]
HZ-3	B	63.39	0.79	14.77	11.32	0.16	4.28	1.95	3.66	0.06	0.15	0.03	100.56	本文郑远川等^[11]
H18	C	64.88	0.38	12.20	5.72	0.34	6.65	7.08	0.81	0.65	0.06	0.82	95.32	本文郑远川等^[11]
HZ-260	C	69.19	0.43	13.39	5.18	0.04	2.34	3.21	3.11	1.91	0.15	0.57	100.03	本文郑远川等^[11]
H3	D	74.63	0.23	11.63	3.51	0.08	0.61	1.84	2.97	3.12	0.03	1.73	100.36	本文
H4	D	73.28	0.19	13.11	2.93	0.08	1.03	2.70	3.65	1.22	0.04	1.92	100.15	本文
H15	E	77.44	0.17	9.81	3.37	0.08	0.59	1.98	1.36	2.60	0.03	2.36	99.81	本文
H16	E	80.04	0.09	8.26	4.19	0.09	0.55	2.32	2.45	0.30	0.01	1.88	100.16	本文

样号	样品类型	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	烧失量	总和	资料来源
H2	A	55.01	0.54	16.91	8.78	0.16	4.89	9.38	3.42	0.45	0.12	0.78	100.42	本文
H7		54.00	0.68	15.82	11.22	0.15	6.72	6.61	3.27	0.51	0.17	1.01	100.15
H8		51.93	0.60	16.52	9.50	0.17	6.01	8.47	3.93	1.17	0.14	1.94	100.40
H9		56.15	0.51	16.07	8.71	0.16	6.09	7.57	3.75	0.70	0.12	0.71	100.53
H14		48.90	0.35	17.44	10.06	0.18	8.20	10.62	2.34	0.64	0.07	1.25	100.05
H13	B	59.19	0.45	10.75	11.14	0.34	6.65	7.08	0.81	0.65	0.06	2.35	99.47	本文郑远川等^[11]
HZ-3	B	63.39	0.79	14.77	11.32	0.16	4.28	1.95	3.66	0.06	0.15	0.03	100.56	本文郑远川等^[11]
H18	C	64.88	0.38	12.20	5.72	0.34	6.65	7.08	0.81	0.65	0.06	0.82	95.32	本文郑远川等^[11]
HZ-260	C	69.19	0.43	13.39	5.18	0.04	2.34	3.21	3.11	1.91	0.15	0.57	100.03	本文郑远川等^[11]
H3	D	74.63	0.23	11.63	3.51	0.08	0.61	1.84	2.97	3.12	0.03	1.73	100.36	本文
H4	D	73.28	0.19	13.11	2.93	0.08	1.03	2.70	3.65	1.22	0.04	1.92	100.15	本文
H15	E	77.44	0.17	9.81	3.37	0.08	0.59	1.98	1.36	2.60	0.03	2.36	99.81	本文
H16	E	80.04	0.09	8.26	4.19	0.09	0.55	2.32	2.45	0.30	0.01	1.88	100.16	本文

元素含量及特征值	样品号
	H2	H7	H8	H9		H14	H13	HZ-3	H18	HZ-260	H3	H4	H15	H16
	A						B		C		D		E
La	4.61	5.40	5.97	5.09	2.11		14.20	11.37	7.75	24.10	19.09	21.34	23.05	23.36
Ce	11.11	13.42	15.42	13.40	5.68		30.84	22.69	18.13	58.57	40.43	45.73	48.16	62.85
Pr	1.47	1.79	2.08	1.73	0.82		3.69	3.26	2.26	5.96	5.21	4.85	6.03	6.53
Nd	6.16	7.81	8.30	7.41	3.72		14.05	13.26	9.74	20.73	19.66	16.95	21.52	22.91
Sm	1.59	2.28	1.99	1.85	1.05		3.18	2.87	2.48	3.41	4.02	2.89	4.92	5.35
Eu	0.60	0.68	0.75	0.67	0.49		1.12	1.03	0.69	1.03	0.81	0.70	0.58	0.96
Gd	1.84	2.58	2.23	2.20	1.17		3.27	3.04	3.04	3.26	3.39	2.06	4.85	4.71
Tb	0.29	0.43	0.34	0.33	0.20		0.48	0.54	0.47	0.49	0.45	0.27	0.70	0.77
Dy	1.90	2.97	2.12	2.24	1.33		2.94	3.15	3.38	2.57	2.21	1.17	3.79	4.65
Ho	0.39	0.59	0.46	0.47	0.30		0.60	0.74	0.70	0.51	0.40	0.21	0.73	0.90
Er	1.24	1.87	1.40	1.38	0.89		1.90	1.95	2.07	1.40	1.12	0.60	1.92	2.59
Tm	0.16	0.26	0.19	0.21	0.14		0.26	0.30	0.32	0.21	0.16	0.08	0.26	0.38
Yb	1.22	1.85	1.28	1.32	1.05		1.74	1.91	2.19	1.25	1.03	0.61	1.64	2.59
Lu	0.18	0.28	0.22	0.22	0.16		0.26	0.32	0.34	0.21	0.19	0.11	0.26	0.33
Y	10.49	15.77	11.04	11.46	6.86		16.53	17.85	18.48	14.14	9.75	5.30	17.10	21.32
ΣREE	32.76	42.21	42.75	38.52	19.11		78.53	66.43	53.56	123.70	98.17	97.57	118.41	138.88
LREE	25.54	31.38	34.51	30.15	13.87		67.08	54.48	41.05	113.80	89.22	92.46	104.26	121.96
HREE	7.22	10.83	8.24	8.37	5.24		11.45	11.95	12.51	9.90	8.95	5.11	14.15	16.92
LREE/HREE	3.54	2.90	4.19	3.60	2.65		5.86	4.56	3.28	11.49	9.97	18.09	7.37	7.21
(La/Yb)_N	2.55	1.97	3.15	2.61	1.36		5.51	4.02	2.39	13.03	12.52	23.64	9.50	6.09
δEu	1.07	0.85	1.08	1.01	1.35		1.05	1.06	0.77	0.93	0.65	0.84	0.36	0.57
δCe	1.00	1.01	1.02	1.06	1.01		0.98	0.87	1.01	1.12	0.94	1.02	0.94	1.18