基于PMGRA气体地球化学测量在辽东浅覆盖区找矿的可行性

林成贵; 程志中; 姚晓峰; 颜廷杰; 李阳; 王伟; 郭强

doi:10.3799/dqkx.2020.263

基于PMGRA气体地球化学测量在辽东浅覆盖区找矿的可行性

doi: 10.3799/dqkx.2020.263

林成贵^{1, 2, ,},
程志中^{1, 2, ,},
姚晓峰^{1, 2},
颜廷杰^{1, 2},
李阳³,
王伟⁴,
郭强⁴

1.
中国地质调查局发展研究中心, 北京 100037
2.
自然资源部矿产勘查技术指导中心, 北京 100083
3.
中国地质大学地球科学与资源学院, 北京 100083
4.
辽宁省有色地质局一〇三队, 辽宁丹东 118008

基金项目:

国家重点研发计划项目 2018YFC0603806

中国地质调查局二级项目 DD20190166

详细信息

作者简介:
林成贵(1990-), 男, 工程师, 硕士, 主要从事勘查地球化学及找矿预测研究.ORCID:0000-0002-3336-4260.E-mail:linchenggui1991@163.com

通讯作者:
程志中, E-mail:chengzhizhong69@163.com

中图分类号: P593
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出版历程
- 收稿日期: 2020-06-23
- 刊出日期: 2020-11-15

Feasibility of Prospecting Based on PMGRA Gas Geochemical Survey in Shallow Covered Area of Liaodong Area

Lin Chenggui^{1, 2
,
,},
Cheng Zhizhong^{1, 2
, ,},
Yao Xiaofeng^{1, 2},
Yan Tingjie^{1, 2},
Li Yang³,
Wang Wei⁴,
Guo Qiang⁴

1.
Development and Research Center, China Geological Survey, Beijing 100037, China
2.
Technical Guidance Center for Mineral Resources Exploration, Ministry of Natural Resources, Beijing 100083, China
3.
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
4.
103 Brigade of Non-Ferrous Geological Bureau of Liaoning Province, Dandong 118008, China

摘要

摘要: 气体能携带深部矿化信息沿着岩石裂隙和断裂带迁移至地表，因此气体地球化学方法可以用于寻找覆盖层以下的隐伏断裂和矿体.基于便携式多组分气体快速分析仪（PMGRA），应用气体地球化学方法对辽东地区五龙金矿区和青城子地区开展了探索性的试验研究，并辅以相应的土壤地球化学测量进行对比.结果显示，异常区气体的浓度衬值非常大；在部分气体异常区，沿着构造倾向方向，具有CO₂异常峰值出现在H₂S、SO₂和CH₄之前的特点.在辽东浅覆盖区，气体和土壤地球化学测量均能反映隐伏构造和矿体；而在覆盖较厚地区，气体地球化学测量对断裂和矿体反映更明显，受覆盖层的类型和厚度影响较小.本次试验结果初步显示了基于PMGRA气体地球化学测量方法在浅覆盖区具有一定的可行性.
- 便携式多组分气体快速分析仪 /
- 浅覆盖区 /
- 五龙金矿 /
- 青城子地区 /
- 辽东 /
- 地球化学
Abstract: Gas can carry deep mineralization information migrated to the surface along the rock fissures and fault zones. Therefore, gas geochemical methods can be used to find hidden faults and ore bodies below the cover layer. Based on the Portable Multi-Component Gas Rapid Analyzer (PMGRA) geochemical method, exploratory experimental studies were carried out in Wulong gold mining area and Qingchengzi area, Liaodong area, and supplemented by corresponding soil geochemical surveys for comparison. The results show that the concentration of the gas in the abnormal area is very large, with the abnormal peaks of CO₂ appearing before H₂S, SO₂ and CH₄ in part of the gas anomaly area, along the structural dip direction. In the shallow covered area of Liaodong, both gas and soil geochemical surveys can reflect hidden structures and ore bodies. However, in the thicker covered area, gas geochemical surveys can more clearly reflect the faults and ore bodies, and are less affected by the type and thickness of the cover layer. The results of this test initially show the feasibility of PMGRA geochemical survey method in shallow covered area.
- PMGRA /
- shallow covered area /
- Wulong gold deposit /
- Qingchengzi area /
- Liaodong area /
- geochemistry

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图 1 五龙金矿区地质简图

据Yu et al.(2018）修改

Fig. 1. The geological sketch map of Wulong gold deposit

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图 2 青城子地区地质简图

据丹东青城子矿业有限公司(2010).辽宁省凤城市青城子铅锌矿接替资源勘查报告

Fig. 2. The geological sketch map of Qingchengzi area

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图 3 研究区断裂和矿体野外照片

a.鸡心岭断裂的断层泥及断层角砾；b.鸡心岭断裂的断层泥；c.163号脉附近闪长岩上的石英脉及黄铁矿集合体；d.蚂蚁山附近的尖山子断裂

Fig. 3. Field photographs of fractures and orebodies in the study area

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图 4 PMGRA简易装置示意

Fig. 4. Schematic diagram of PMGRA simple device

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图 5 五龙金矿P1地球化学综合剖面

Fig. 5. Comprehensive geochemical profile of P1 in Wulong gold deposit

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图 6 五龙金矿P2地球化学综合剖面

Fig. 6. Comprehensive geochemical profile of P2 in Wulong gold deposit

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图 7 青城子地区P3地球化学综合剖面

Fig. 7. Comprehensive geochemical profile of P3 in Qingchengzi area

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图 8 青城子地区P4地球化学综合剖面

Fig. 8. Comprehensive geochemical profile of P4 in Qingchengzi area

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表 1 P1剖面气体和土壤数据参数统计

Table 1. Parameter statistics of gas and soil geochemical data in P1 profile

元素	样品数	最小值	最大值	背景值	平均值	标准离差	异常下限	富集系数	变异系数	衬值
H₂S	24	0.009	0.515	0.036	0.083	0.124	0.07	2.31	1.48	14.31
SO₂	24	0.289	3.729	0.654	0.953	0.877	1.28	1.46	0.92	5.70
CH₄	24	550	2 200	1 113	1 113	456.9	2 027	1.00	0.41	1.98
CO₂	24	6 000	99 000	17 434	20 833	18 788	35 240	1.19	0.90	5.68
Au	17	1.9	233	18.6	38	59.8	55.1	44.70	1.58	12.53
Ag	17	0.021	4.781	0.218	0.648	1.192	0.60	10.80	1.84	21.93
As	17	3.2	121	37.124	37.1	35.2	107.47	8.44	0.95	3.26
Hg	17	24	50	34.529	35	7	48.12	2.88	0.20	1.45
Cu	17	9.3	17.3	12.824	12.8	2.7	18.23	0.75	0.21	1.35
Pb	17	30.4	52.1	40	40.4	6.3	53.1	2.13	0.16	1.30
Zn	17	36.2	66.8	49	49.5	9.1	67.8	0.73	0.18	1.36
W	17	0.96	6.7	2.7	2.9	1.46	4.99	3.10	0.49	2.48
Sn	17	0.2	7.5	0.69	1.7	2.1	1.6	0.80	1.28	10.87
Mo	17	0.23	3.39	0.59	0.97	0.94	1.08	1.56	0.97	5.75
Bi	17	0.21	28.5	0.63	3.34	7.66	1.08	18.5	2.30	45.24
Mn	17	96	425	256	256	97	450	0.44	0.38	1.66
Cr	17	67.2	116	89.4	89.4	14.2	117.9	1.94	0.16	1.30
Co	17	5.2	13.1	7.6	7.9	2.1	10.9	0.79	0.26	1.72
Ni	17	29.3	57.4	39.0	40.1	6.7	49.5	1.61	0.17	1.47
B	17	19	114	61.8	62	26	113.6	2.90	0.42	1.84
F	17	330	947	629	629	157	942	1.30	0.25	1.51
注：背景值为剔除特异值后的平均值，异常下限为背景值加两倍标准离差，气体的富集系数为平均值与背景值的比值，元素的富集系数为平均值与中国东部元素丰度（迟清华和鄢明才，2007）的比值，变异系数为标准离差与平均值的比值，气体或元素的衬值为最大值与背景值的比值.气体的浓度单位为10^-6；土壤数据中除Au、Hg的含量单位为10^-9，其余元素的含量单位为10^-6.

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表 2 P2剖面气体和土壤数据参数统计

Table 2. Parameter statistics of gas and soil geochemical data in P2 profile

元素	数据个数	最小值	最大值	背景值	平均值	标准离差	异常下限	富集系数	变异系数	衬值
H₂S	16	0.011	> 1	0.082	0.188	0.334	0.23	2.29	1.78	12.20
SO₂	16	0.379	> 4	0.93	1.44	1.58	2.0	1.55	1.09	4.30
CH₄	16	495	3 600	1 164	1 317	819	2 298	1.13	0.62	3.09
CO₂	16	13 000	96 000	30 733	34 812	20 334	55 855	1.13	0.58	3.12
Au	16	0.9	4.6	2.62	2.6	1.1	4.8	3.10	0.41	1.76
Ag	16	0.038	0.204	0.076	0.088	0.044	0.134	1.47	0.50	2.68
As	16	8.1	21.5	12.3	12.8	3.6	18.2	2.90	0.28	1.75
Hg	16	38	70	49	51	9	65	4.20	0.18	1.43
Cu	16	7	13.7	10.1	10.1	2	14.1	0.60	0.20	1.36
Pb	16	19.4	35.4	27.6	27.6	4.3	36. 1	1.45	0.15	1.28
Zn	16	45.2	78.5	56.5	57.8	9.3	72.3	0.85	0.16	1.39
W	16	1.6	2.98	2.2	2.18	0.45	3.1	2.20	0.21	1.35
Sn	16	1	3.3	1.9	2	0.7	3.3	0.95	0.34	1.74
Mo	16	0.28	1.71	0.8	0.8	0.48	1.8	1. 30	0.60	2.14
Bi	16	0.28	0.86	0.52	0.52	0.17	0.87	2.91	0.33	1.65
Mn	16	165	456	305	305	82	469	0.53	0.27	1.50
Cr	16	58.7	102	75	77.1	11.5	95	1.68	0.15	1.36
Co	16	5.2	12.8	8.2	8.5	1.9	11.4	0.85	0.22	1.56
Ni	16	20.6	44.2	28.6	29.5	7.1	40.9	1.18	0.24	1.55
B	16	9	28	13.0	16	6	18.9	0.75	0.36	2.15
F	16	400	543	480	481	48	576	0.99	0.10	1.13
注：背景值、异常下限、富集系数、变异系数、衬值的计算方法同表 1；气体的浓度和元素的含量单位同表 1.

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表 3 P3剖面气体和土壤数据参数统计

Table 3. Parameter statistics of gas and soil geochemical data in P3 profile

元素	样品数	最小值	最大值	背景值	平均值	标准离差	异常下限	富集系数	变异系数	衬值
H₂S	57	0.012	0.804	0.145	0.199	0.13	0.40	1.37	1.02	5.54
SO₂	57	0.407	> 5	1.744	1.857	1.07	3.88	1.06	0.65	2.87
CH₄	57	907.7	3 622.3	1 947.15	1 947.15	708.65	3 364.45	1.00	0.36	1.86
CO₂	57	800	19 900	2 914.4	4 901.1	1 623.01	6 160.37	1.68	0.96	6.83
Au	43	0.6	263	11.44	22.6	17.26	45.95	26.57	2.38	11.64
Ag	43	0.02	4.07	0.32	0.61	0.38	1.08	10.10	1.57	6.67
As	43	9.5	200	31.65	43.3	22.01	75.68	9.84	1.03	4.62
Hg	43	35	77	51.37	51	10.97	73.32	4.28	0.21	1.51
Cu	43	13.3	66.4	22.16	23.5	4.57	31.29	1.38	0.35	2.83
Pb	43	19.1	98.6	37.23	38.7	9.95	57.13	2.03	0.35	2.55
Zn	43	43.3	177	67.39	71.3	10.19	87.77	1.05	0.30	2.48
W	43	2.64	22.7	4.1	5.09	1.08	6.25	5.25	0.77	4.46
Sn	43	0.2	6.5	1.36	1.7	1.01	3.37	0.79	0.90	3.82
Mo	43	0.14	2.95	0.38	0.54	0.24	0.87	0.88	1.12	5.46
Bi	43	0.26	1.16	0.48	0.5	0.09	0.67	2.75	0.28	2.32
Mn	43	228	751	439.51	440	122.25	684.00	0.76	0.28	1.71
Cr	43	56.9	91.8	73.91	73.9	8.81	91.53	1.61	0.12	1.24
Co	43	8.9	19.4	14.15	14.2	2.15	18.45	1.42	0.15	1.37
Ni	43	39.5	65.3	49.25	49.6	5.03	59.32	1.98	0.11	1.32
B	43	23	162	62.3	70	23.72	109.74	3.35	0.48	2.31
F	43	359	971	620.44	620	137.59	895.62	1.28	0.22	1.13
注：背景值、异常下限、富集系数、变异系数、衬值的计算方法同表 1；气体的浓度和元素的含量单位同表 1.

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表 4 P4剖面气体地球化学数据参数统计

Table 4. Parameter statistics of gas geochemical data in P4 profile

元素	样品数	最小值	最大值	背景值	平均值	标准离差	异常下限	富集系数	变异系数	衬值
H₂S	23	0.005	> 1	0.03	0.09	0.02	0.07	3.00	2.31	33.33
SO₂	23	0.123	> 5	0.54	0.73	0.33	1.19	1.35	1.35	9.26
CH₄	23	683.8	4 550	1 415.47	1 678.34	399.05	2 213.58	1.19	0.57	3.21
CO₂	23	4 000	75 000	15 400	21 304.35	7 653.00	30 706.00	1.38	0.82	4.87
注：背景值、异常下限、富集系数、变异系数、衬值的计算方法同表 1；气体的浓度单位同表 1.

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基于PMGRA气体地球化学测量在辽东浅覆盖区找矿的可行性

doi: 10.3799/dqkx.2020.263

作者简介:
林成贵(1990-), 男, 工程师, 硕士, 主要从事勘查地球化学及找矿预测研究.ORCID:0000-0002-3336-4260.E-mail:linchenggui1991@163.com

通讯作者:
程志中, E-mail:chengzhizhong69@163.com

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Feasibility of Prospecting Based on PMGRA Gas Geochemical Survey in Shallow Covered Area of Liaodong Area

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留言板

基于PMGRA气体地球化学测量在辽东浅覆盖区找矿的可行性

doi: 10.3799/dqkx.2020.263

作者简介: 林成贵(1990-), 男, 工程师, 硕士, 主要从事勘查地球化学及找矿预测研究.ORCID:0000-0002-3336-4260.E-mail:linchenggui1991@163.com

通讯作者: 程志中, E-mail:chengzhizhong69@163.com

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出版历程

Feasibility of Prospecting Based on PMGRA Gas Geochemical Survey in Shallow Covered Area of Liaodong Area

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出版历程

目录

作者简介:
林成贵(1990-), 男, 工程师, 硕士, 主要从事勘查地球化学及找矿预测研究.ORCID:0000-0002-3336-4260.E-mail:linchenggui1991@163.com

通讯作者:
程志中, E-mail:chengzhizhong69@163.com