四川马头金矿区土壤地球化学测量异常特征及找矿模型

doi:10.11720/wtyht.2023.2456

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Abstract

The Matou gold deposit is located in the Mianning-Yanyuan strike-slip orogenic belt and is part of the deeply cut Quaternary coverage area and, thus, has limited surface prospecting clues. In this prospecting stage, a comprehensive anomaly area was delineated through the 1:10 000 soil geochemical survey. Then, gold ore bodies were discovered through trenching engineering, indicating excellent prospecting performance. Moreover, this study established a geological-geochemical prospecting model dominated by the HT³ anomaly area by combining the geological and geochemical anomalies in the work area. Finally, the next prospecting direction was proposed.

Key words： Matou geochemical characteristic prospecting model gold

Received: 18 August 2021 Published: 27 April 2023

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	Articles by authors
	Jun-Jun LI
	Yu WEI
	Qing-Song ZHANG
	Wei-Hua WANG
	Wei LIU
	Liang XIANG

Cite this article:

Jun-Jun LI,Yu WEI,Qing-Song ZHANG, et al. The anomalies determined using a soil geochemical survey and prospecting model of the Matou gold deposit in Sichuan Province[J]. Geophysical and Geochemical Exploration, 2023, 47(2): 309-320.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.2456 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I2/309

Geotectonic location map of Matou gold deposit
Ⅴ—Qiangtang-Sanjiang orogenic system; Ⅴ₁—Yulongtage-Bayankala foreland basin; Ⅴ_1-2—Motianling block; Ⅴ_1-3—Kekexili-Songpan foreland basin; Ⅴ_1-4—Luhuo-Daofu rift basin; Ⅴ_1-5—Yajiang residual basin;Ⅴ₂—Garz-Litang arc basin system; Ⅴ_2-1—Garz-Litang ophiolite melange belt; Ⅴ_2-2—Yidun-Shaluli island arc belt; Ⅴ_2-3—Miange-Qingdarou arc back basin; Ⅴ₃—Zhongza-Zhongdian block; Ⅴ₄—Xijin Ulan lake-Jinsha river-Ailao mountain junction; Ⅴ₅—Xichang-Lanping block; Ⅴ_5-1—Zhiduo-Jiangda-Weixi continental margin arc belt; Ⅴ_5-3—Changdu-Lanping Mesozoic bi-directional back arc foreland basin; Ⅷ—Yangtze block area; Ⅷ₁—upper Yangtze block; Ⅷ_1-1—passive marginal basin on the western margin of Yangze block; Ⅷ_1-2—Yanyuan-Lijiang Mesozoic marginal depression belt; Ⅷ_1-3—Chuxiong Mesozoic foreland basin; Ⅷ_1-4—Kangding basement complex belt; Ⅷ_1-5—east Yunnan Carbonate platform; Ⅷ_1-6—west Sichuan foreland basin;1—primary tectonic line;2—secondary tectonic line;3—tertiary tectonic line;4—location of working area

Geochemistry parameters of Matou gold deposit

Distribution characteristics of Au in soil measurements in main geological bodies

List of lower limits of soil anomalies

Matrix of correlation coefficients of each element of soil geochemistry in Matou gold mining area

Tree diagram of R-type cluster analysis in soil measurement

HT¹ composite anomaly profile
1—schist of the second member of Yangxin formation;2—limestone of the first member of Yangxin formation;3—limestone of the second member of the Qujing formation;4—calcareous dolomite and limestone of the first member of the Qujing formation;5—carbonaceous slate of the second member of Pojiao formation;6—diabase;7—geologic boundary;8—fault and attitude;9—exploratory trench and numbers;10—industrial ore bodies and numbers;11—low-grade ore bodies and numbers

HT² composite anomaly profile
1—schist of the second member of Yangxin formation;2—limestone of the first member of Yangxin formation;3—limestone of the second member of the Qujing formation;4—carbonaceous slate of the second member of Pojiao formation;5—diabase;6—geologic boundary;7—fault and attitude;8—exploratory trench and numbers

HT³ composite anomaly profile
1—basalt of Emeishan formation;2—schist of the second member of Yangxin formation;3—limestone of the first member of Yangxin formation;4—limestone of the second member of the Qujing formation;5—carbonaceous slate of second member of Pojiao formation;6—diabase;7—geologic boundary;8—fault and attitude;9—exploratory trench and numbers;10—industrial ore bodies and numbers;11—low-grade ore bodies and numbers

Brief description of orebody characteristics

HT³ composite anomaly map
1—abnormal range and concentration zoning of As;2—abnormal range and concentration zoning of Au;3—abnormal range and concentration zoning of Bi;4—abnormal range and concentration zoning of Sn;5—abnormal range and concentration zoning of Ag;6—abnormal range and concentration zoning of Cu;7—abnormal range and concentration zoning of Hg;8—abnormal range and concentration zoning of Pb;9—abnormal range and concentration zoning of Sb;10—abnormal range and concentration zoning of Zn

Geology geochemistry ore forming factors of Matou gold deposit

Sketch map of geology-geochemistry prospecting model in Matou gold mining area
1—second member of Yangxin formation;2—the first member of Yangxin formation;3—the second member of Qujing formation;4—the first member of Pojiao formation;5—diabase;6—gold orebody;7—limonization;8—pyrite mineralization;9—sericitization;10—silicification;11—geologic boundary;12—major faults and their numbering

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