老挝川圹省约俄锡多金属矿区沟系土壤地球化学特征及成矿预测

doi:10.11720/wtyht.2021.1268

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Abstract

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.

Key words： Changshan structure valley system soil geochemical survey abnormal characteristics metallogenic prognosis Laos

Received: 18 May 2020 Published: 20 August 2021

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	Qi SHI
	Yan-Peng ZHAO
	Zhan-Dong CHI
	Hua GE
	Tie-Suo KANG
	Fa-Xing LI
	Xiang-Yu WEI
	Jian-Kun LU
	Ren-Yi YANG

Cite this article:

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.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1268 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I4/824

Ⅰ11—Heishuihe Indosinian rift zone;Ⅰ₂—Lanping-Simao-southern Mesozoic depression zone;Ⅱ₁—east Indosinian block Majiang-Sangnu Variscan-Indochina arc zone; Ⅱ₂—Luang Prabang Variscan fold zone; Ⅱ₃—Vientiane(basin)-Kunsong (continental core) block; Ⅱ₄—Xieng Khuoang-Changshan Variscan folded belt;① —Yuanjiang-Honghe fault;②—Ailaoshan-Heishuihe fault;③—Amojiang-Majiang suture zone;④—Dianbianfu-Chengyi suture zone;⑤—Puleishan-Mengmei fault;⑥—Lanjiang fault;⑦—Xieng Khuoang-Changshan fault
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Location of Yue'e copper polymetallic mining area
Ⅰ₁—Changdu-Lanping-Simao block Mojiang-Lvchun Variscan-Indosinian fold belt;

Ⅰ 11

—Heishuihe Indosinian rift zone;Ⅰ₂—Lanping-Simao-southern Mesozoic depression zone;Ⅱ₁—east Indosinian block Majiang-Sangnu Variscan-Indochina arc zone; Ⅱ₂—Luang Prabang Variscan fold zone; Ⅱ₃—Vientiane(basin)-Kunsong (continental core) block; Ⅱ₄—Xieng Khuoang-Changshan Variscan folded belt;① —Yuanjiang-Honghe fault;②—Ailaoshan-Heishuihe fault;③—Amojiang-Majiang suture zone;④—Dianbianfu-Chengyi suture zone;⑤—Puleishan-Mengmei fault;⑥—Lanjiang fault;⑦—Xieng Khuoang-Changshan fault

Simplified geological map and gully point layout of the Yue’e mining area in Xieng Khouang Province, Laos

Characteristics of the elements content

The map of element differentiation feature

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

List of characteristics of ore body in area B

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

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