The tin-polymetallic mining area of the Yue'e ore district, XiengKhouang Province, Laos, is located in the west of the XiengKhouang Laos-Changshan Vietnam tectonic magmatic belt. Based on the 1:25 000 valley system soil geochemical survey, combined with an analysis of the characteristics of element variation coefficients and concentration coefficients, the correlation of elements, anomaly verification, and gold and other polymetallic ore prospecting potentials, the authors optimized multiple target and prospects areas. The position of the mineralized body was inferred based on geochemical exploration anomalies in key target areas. Through trench verification and drilling engineering verification, good prospecting results were achieved. The area is considered to have copper, tin, lead, zinc, tungsten. It is shown that this method can quickly delineate the prospecting target area and distant scenic area in the thick coverage area and extensive blank research area of Southeast Asian tropical monsoon climate, and can provide an effective basis for the next exploration work.
Qi SHI,Yan-Peng ZHAO,Zhan-Dong CHI, et al. Valley system soils geochemical characteristics and metallogenic prediction of the Yue'e tin polymetallic mining area in Xieng Khouang Province, Laos[J]. Geophysical and Geochemical Exploration,
2021, 45(4): 824-834.
Simplified geological map and gully point layout of the Yue’e mining area in Xieng Khouang Province, Laos
参数
Ag
As
Au
Bi
Co
Cr
Cu
Hg
Mo
Ni
Pb
Sb
Sn
W
Zn
原始数据
平均值Cf1
0.091
15.40
2.13
0.52
15.10
77.70
27.90
97.40
0.79
34.60
28.00
1.79
4.90
3.66
77.50
最小值
0.020
0.80
0.43
0.03
1.00
4.50
1.90
8.00
0.27
2.40
1.00
0.08
0.80
0.30
2.70
最大值
0.290
>1000
145
20.20
89.40
363
475.30
>2000
10.57
239
589
40.83
400
64.70
2000
标准离差
0.067
34.10
2.82
0.52
7.50
38.80
15.40
212.19
0.61
22.60
21.10
3.00
8.40
3.93
75.70
变异系数Cv1
0.74
2.21
1.32
1.00
0.50
0.50
0.55
2.18
0.77
0.65
0.75
1.68
1.71
1.07
0.98
处理后数据
平均值
0.078
6.50
1.87
0.45
14.80
73.40
26.40
50.82
0.65
30.40
25.70
0.89
4.00
2.46
65.10
最小值
0.020
0.80
0.43
0.05
1.00
4.50
1.90
8.00
0.27
2.40
6.50
0.08
0.90
0.49
2.70
最大值
0.160
16.50
4.15
0.86
35.10
161
56.40
122.28
1.49
70.80
45.10
1.85
7.10
4.43
137
标准离差
0.027
3.30
0.76
0.14
6.80
29.40
10.00
23.84
0.28
13.50
6.50
0.32
1.10
0.66
24.00
变异系数Cv2
0.35
0.51
0.41
0.31
0.46
0.40
0.38
0.47
0.43
0.44
0.25
0.36
0.28
0.27
0.37
异常下限
0.132
13.20
3.39
0.72
28.30
132.30
46.40
98.49
1.21
57.30
38.70
1.53
6.10
3.77
113.20
浓集系数(Cf1/Cf2)
1.14
1.54
1.52
1.73
1.16
1.20
1.16
2.44
0.99
1.33
1.22
2.24
1.96
2.03
1.14
离散程度(Cv1/Cv2)
2.13
4.36
3.25
3.21
1.08
1.25
1.46
4.64
1.79
1.47
2.98
4.66
6.23
4.00
2.65
中国土壤Cf2[27]
0.08
10.00
1.40
0.30
13.00
65.00
24.00
40.00
0.80
26.00
23.00
0.80
2.50
1.80
68.00
Characteristics of the elements content
The map of element differentiation feature
元素
Ag
As
Au
Bi
Co
Cr
Cu
Hg
Mo
Ni
Pb
Sb
Sn
W
Zn
Ag
1.000
As
0.355
1.000
Au
0.166
0.079
1.000
Bi
0.337
0.409
0.158
1.000
Co
0.192
0.123
0.165
0.156
1.000
Cr
0.254
0.128
0.145
0.061
0.516
1.000
Cu
0.340
0.129
0.287
0.361
0.480
0.408
1.000
Hg
0.220
0.516
0.086
0.035
0.129
0.285
0.068
1.000
Mo
0.216
0.500
0.097
0.186
0.197
0.285
0.219
0.355
1.000
Ni
0.449
0.235
0.165
0.113
0.577
0.855
0.447
0.338
0.351
1.000
Pb
0.445
0.159
0.131
0.204
0.298
0.231
0.211
0.131
0.188
0.312
1.000
Sb
0.350
0.656
0.134
0.129
0.168
0.362
0.127
0.725
0.487
0.459
0.268
1.000
Sn
0.300
0.370
0.086
0.730
0.030
-0.014
0.250
0.007
0.155
0.024
0.155
0.078
1.000
W
0.254
0.280
0.087
0.129
0.077
0.364
0.099
0.292
0.274
0.399
0.177
0.453
0.079
1.000
Zn
0.531
0.249
0.122
0.231
0.355
0.465
0.279
0.261
0.285
0.590
0.774
0.367
0.182
0.302
1.000
Correlation coefficient matrix of geochemical data
Combined anomaly map of the Yue’e mining area in Xieng Khouang Province, Laos
Comprehensive anomaly analysis map of area A 1—Quaternary; 2—Permian Khang Khai formation; 3—Carboniferous-Permian Nong Het formation; 4—Ban Lao compound rock mass; 5—copper ore body; 6—faults and their numbers
Section of line 13 in area A 1—Quaternary; 2—Permian Khang Khai formation; 3—skarn alteration zone; 4—biotite granodiorite; 5—copper ore body (w(Cu)≥0.2%); 6—copper mineralization body (w(Cu)=0.1%~0.2%); 7—construction drilling and numbering; 8—design drilling and numbering
Comprehensive anomaly analysis map of area B 1—Permian Khang Khai formation; 2—Carboniferous-Permian Nong Het formation; 3—Ban Lao compound rock mass; 4—Sn ore body and number; 5—fault and number; 6—B prospecting target area
Section of line 00 in area B 1—Quaternary;2—Permian Khang Khai formation;3—fragmented alteration mineralization zone;4—tin polymetallic mineralization (w(Sn)≥0.2%);5—tin polymetallic mineralization (w(Sn)=0.1%~0.2%) ;6—exploring trough and number;7—construction drilling and orientation;8—construction drilling;9—design drilling
Comprehensive anomaly analysis map of area K 1—Permian Khang Khai formation; 2—Carboniferous-Permian Nong Het formation; 3—Ban Lao compound rock masse; 4—fault and number; 5—copper mine
Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences. Application of geophysical and geochemical exploration methods and techniques for China’s important metal mine exploration[M]. Beijing: Geological Publishing House, 2011.
Yang H P, Zhao Z Y, Han J, et al. Application and effect of soil geochemical survey in the Au low background of east kunlun elements:A case study of soil geochemistry in shengou area of Geermu city[J]. Mineral Exploration, 2019,10(2):291-301.
Wang X G, Chen P, Yang Y Q, et al. Valley soil geochemical characteristics and prospecting potential of Pb-polymetallic deposit in yakou area,Yunnan Province[J]. Mineral Resources and Geology, 2018,32(6):1098-1103.
Liu H P, Lu Z Z. Geochemical anomalous characteristics and prospecting significance in Asgede area,northern Ethiopia[J]. Mineral Exploration, 2017,8(4):682-690.
Wang X G, He X Y, Chen P, et al. The application of Valley soil geochemical survey to the Jiucaigou ore district in Neixiang[J]. Geophysical and Geochemical Exploration, 2011,35(6):733-738.
Diao L P, Han R S, Fang W X. Application of soil geochemical survey in the Puqing antimony-gold exploration area deposit and prospecting effect[J]. Geology and Exploration, 2010,46(1):120-127.
Hao B W, Xue C D, Han R S, et al. Application of soil geochemistry of drainage system for ore prospecting in the Puqing Sb-Au orefield[J]. Geology and Prospecting, 2008,44(6):73-78.
Zhu Y Z, Wu J, Cui Z L, et al. Mineral resources in northern area of Lao with its ore-forming prediction[J]. Mineral Resources and Geology, 2007,21(16):665-667.
Shao C L, Wang J S, Li Z J, et al. Study on gold metallogenic belt and mineralization concentrated area of Laos[J]. Mineral Exploration, 2015,6(6):787-792.
Wang H, Wang J L, Chen M T, et al. Geological characteristics and prospecting index of the PhuKham Cu-Au deposit in xiangkhouang province,Laos[J]. Contributions to Geology and Mineral Resources Research, 2014,29(1):66-71.
Zhao H J, Chen Y Q, Lu Y X. Ore-forming model for Cu-Au-Fe ore deposits associated with granites in the Truongson ore-forming belt of Laos[J]. Geological Bulletin of China, 2011,30(10):1619-1627.
Zhao Y P, Wang X M, Xia X X, et al. Geological character and ore genesis of the Nam Paten tin-polymetallic ore deposite[J]. Non-Ferrous Mining and Metallurgy, 2012,28(6):1-4.
Jia R X, Fang W X, Hu R Z. The geochemical characteristics of granites and their geological implication in north-central region of Laos[J]. Journal of Mineralogy and Petrology, 2011,31(3):82-89.
Gao J H, Fan W Y, Wu Z B, et al. Geocheminstry and mineralization of the monzonite granite-porphyry from the PhuPhaLek iron deposit,Laos[J]. Sedimentary Geology and Tethyan Geology, 2015,35(3):102-108.
Liu W, Niu Y J, Dai F Y, et al. Geological-geochemical characteristics and genesis of the phapon gold deposit in Laos[J]. Science Technology and Engineering, 2017,17(30):14-19.
Wang H, Lin F C, Li X Z, et al. The division of tectonic units and tectonic evolution in Laos and its adjacent regions[J]. Geology in China, 2015,42(1):71-84.
Shi M F, Lin F C, Li X Z, et al. Sratigraphic zoning and tectonic events in Indochina and adjacent areas southwest China[J]. Geology in China, 2011,38(5):1244-1256.
Chen Y Q, Liu J L, Feng Q L, et al. Geology of the indochina peninsula in southeast Asia and granite-related deposits [M]. Beijing: Geological Publishing House, 2010: 178-182.
Chen X F, Xiang Y C, Ye J H, et al. Metallogenic characteristics of the central south peninsula tin ore belt in southeast Asia[J]. Geological Bulletin of China, 2015,34(4):734-745.
Wang Y Z, Li X L, Duan L L, et al. Geotectonics and metallogenyin the south Nujiang-Lancang-Jinsha rivers area[M]. Beijing: Geological Publishing House, 2000.
Yang S F, Guo M. Analysis on geological characteristics and ore-controlling factors of Nameng copper polymetallic deposit in Sai Song Phen County, Laos[J]. West-China Exploration Project, 2012(5):167-169.
Wang M C, Wang J T, Peng H L, et al. The application of large-scale geochemical prospecting thchnique to the prospecting for concealed ore deposits:A case study of the Chagandeersi large molybdenum deposit in Urad Rear Banner,Inner Mongolia[J]. Geophysical and Geochemical Exploration, 2018,42(4):668-674.
Yan M C, Gu T X, Chi Q H, et al. Abundance of chemical elements of soils in China and supergenesis geochemistry characteristics[J]. Geophysical and Geochemical Exploration, 1997,21(3):161-167.
Wang W, Wang X Q, Zhang B M, et al. National-scale geochemical mapping and prediction of metallogenic prospective areas in Laos[J]. Acta Geoscientica Sinica, 2020,41(1):80-90.
Yan T T, Wu X, Quan Y K, et al. Heredity,inheritance and similarity of element behaviors among parent rocks and their weathered products:A geochemical lithogene[J]. Geoscience, 2018,32(3):453-467.
[30]
王学求. 巨型矿床与大型矿集区勘查地球化学[J]. 矿床地质, 2010,19(1):76-87.
[30]
Wang X Q. Exploration geochemistry for giant ore deposit or world-class camps in concealed terrains[J]. Mineral Deposits, 2010,19(1):76-87.
