Quantitative and Positioning Study on the Hydrothermal Alteration and Mineralization Relationship of the Yongxin Gold Deposit in the Nenjiang-Heihe Mélange Zone, Heilongjiang Province

Abstract

Abstract:

The Yongxin gold deposit,which was recently discovered in the Nenjiang-Heihe mélange zone, Heilongjiang Province, is a large fracture controlled alteration type gold deposit in Duobaoshan gold-copper metallogenic belt. The ore minerals are composed mainly of petzite, calaverite, native gold, minor sulfides and minor oxide. According to the linear analyses between the thickness of potassium feldspathization zone, sericitization zone, silicification zone and ore-bodies, the thicknesses of the potassium feldspathization zone and silicification zone are positively correlated with ore body thickness. The thickness relation between sericitization zone and ore body are negative. According to the quantitative assessment and the chart of the horizontal projection of the alteration zones, sericitization, potassium feldspathization and silicification zones occurred respectively in the direction from SE to NW, like a “step”. The thicknesses of the potassium feldspathization zone, sericitization zone and silicification zone have a certain corresponding relationship in each “step”. The source of the ore-forming fluid of the deposit is inferred by the authors at the northwest depth, and good prospecting potential in that direction is suggested.

Key words: Yongxin gold deposit in Heilongjiang Province, quantitative and positioning assessment, thicknesses of the alteration zones and ore body, ore prospecting

CLC Number:

YUAN Maowen, ZENG Yongjie, LI Chenglu, LI Shisheng, LI Shengrong. Quantitative and Positioning Study on the Hydrothermal Alteration and Mineralization Relationship of the Yongxin Gold Deposit in the Nenjiang-Heihe Mélange Zone, Heilongjiang Province[J]. Geoscience, 2017, 31(02): 278-289.

Figures/Tables 12

References 34

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蚀变分带	主要蚀变类型	蚀变矿物组合	蚀变岩石颜色	蚀变带厚度/m	与矿化的关系
硅化带	硅化±绢云母化	石英+黄铁矿+绢云母±钾长石	暗灰色、灰白色	0~57	富矿体
钾长石化带	钾长石化±绢云母化	钾长石+黄铁矿+石英+绢云母±高岭石±绿泥石	肉红色、浅红色	0~113	无矿化
绢云母化带	绢云母化±钾长石化±硅化	绢云母+绿泥石+黄铁矿+钾长石±石英±方解石±高岭石	灰绿色、浅绿色	34~254	弱矿化

蚀变分带	主要蚀变类型	蚀变矿物组合	蚀变岩石颜色	蚀变带厚度/m	与矿化的关系
硅化带	硅化±绢云母化	石英+黄铁矿+绢云母±钾长石	暗灰色、灰白色	0~57	富矿体
钾长石化带	钾长石化±绢云母化	钾长石+黄铁矿+石英+绢云母±高岭石±绿泥石	肉红色、浅红色	0~113	无矿化
绢云母化带	绢云母化±钾长石化±硅化	绢云母+绿泥石+黄铁矿+钾长石±石英±方解石±高岭石	灰绿色、浅绿色	34~254	弱矿化

钻孔号	钾长石化带厚度/m	绢云母化带厚度/m	硅化带厚度/m	矿体厚度/m
ZK225-01	39	81	24	3.0
ZK215-05	85	127	9	16.0
ZK215-04	34	125	4	1.0
ZK215-03	28	99	27	16.3
ZK205-09	53	100	10	2.2
ZK205-07	66	207	14	3.7
ZK205-06	11	41	25	17.8
ZK205-05	37	201	25	4.0
ZK195-12	31	208	0	0.7
ZK195-11	34	151	8	4.2
ZK195-10	16	192	22	2.0
ZK195-09	85	206	9	1.2
ZK195-07	34	193	3	6.2
ZK195-06	21	193	6	3.8
ZK190-05	46	113	23	24.6
ZK180-17	28	127	25	22.0
ZK180-15	67	142	37	8.2
ZK180-13	59	132	9	4.8
ZK180-11	113	170	28	30.0
ZK180-10	25	128	22	15.0
ZK175-12	77	106	40	50.0
ZK175-10	26	105	43	4.4
ZK175-04	44	110	18	20.0
ZK175-02	22	125	32	18.6
ZK170-18	4	71	40	1.0
ZK170-17	54	254	26	1.0
ZK170-14	6	141	57	9.6
ZK170-01	0	40	23	10.8
ZK165-04	2	34	18	1.0

钻孔号	钾长石化带厚度/m	绢云母化带厚度/m	硅化带厚度/m	矿体厚度/m
ZK225-01	39	81	24	3.0
ZK215-05	85	127	9	16.0
ZK215-04	34	125	4	1.0
ZK215-03	28	99	27	16.3
ZK205-09	53	100	10	2.2
ZK205-07	66	207	14	3.7
ZK205-06	11	41	25	17.8
ZK205-05	37	201	25	4.0
ZK195-12	31	208	0	0.7
ZK195-11	34	151	8	4.2
ZK195-10	16	192	22	2.0
ZK195-09	85	206	9	1.2
ZK195-07	34	193	3	6.2
ZK195-06	21	193	6	3.8
ZK190-05	46	113	23	24.6
ZK180-17	28	127	25	22.0
ZK180-15	67	142	37	8.2
ZK180-13	59	132	9	4.8
ZK180-11	113	170	28	30.0
ZK180-10	25	128	22	15.0
ZK175-12	77	106	40	50.0
ZK175-10	26	105	43	4.4
ZK175-04	44	110	18	20.0
ZK175-02	22	125	32	18.6
ZK170-18	4	71	40	1.0
ZK170-17	54	254	26	1.0
ZK170-14	6	141	57	9.6
ZK170-01	0	40	23	10.8
ZK165-04	2	34	18	1.0

数据名称	平方和	df	平均值平方	F	显著性
回归	1 425.452	3	475.151	5.531	0.05
残差	2 147.700	25	85.908
统计	3 573.152	28