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Gold Science and Technology ›› 2021, Vol. 29 ›› Issue (6): 781-794.doi: 10.11872/j.issn.1005-2518.2021.06.068

• Mineral Exploration and Resource Evaluation • Previous Articles     Next Articles

Element Association Anomalies of Tectonite and Prediction of Concealed Orebodies in the 1 944 m Middle Section of Daliangzi Pb-Zn Deposit，Sichuan

Haifeng WANG1(),Hongsheng GONG2(),Zhixing FENG1,Runsheng HAN2,Tianzhu DING3,Xinyue ZHAO3,Peng WU2   

  1. 1.Western Mining Co. , Ltd. , Xining 810001, Qinghai, China
    2.Southwest Institute of Geological Survey, Geological Survey Center for Non-ferrous Metals Resources, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
    3.Sichuan Huidong Daliang Mining Co. , Ltd. , Liangshan 615205, Sichuan, China
  • Received:2021-06-03 Revised:2021-09-27 Online:2021-12-31 Published:2022-03-07
  • Contact: Hongsheng GONG E-mail:ydc1234567@sina.com;156016616@qq.com

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Abstract:

The Daliangzi Pb-Zn deposit in Sichuan Province is located in the southwestern margin of the Yangtze block，which is obviously controlled by the NWW-trending—nearly EW-trending and NE-trending structure between the Xiaojiang deep fault and the Puduhe deep fault. At present，the deep prospecting of the mine is not clear，and it is urgent to explore new prospecting ideas and methods to achieve new prospecting breakthroughs. In this study，the characteristics of the metal-element association halos within mineralization-related fault zones are used to predict the concealed ore bodies. Firstly，the fine analysis of deposit structure is carried out，and it is believed that the combination of NWW—nearly EW-trending dextral extensional—torsional ore-controlling faults （F15，F1，etc.），the NW-trending extensional—dextral extensional （torsional） faults and its secondary folds forms a “negative flower-like structure”，which directly controls the distribution of deposits and ore bodies （veins），and is the product of the northeast structural belt under the same stress field. On the above knowledge，based on the 1∶1 000 tectonic geochemical mapping in the middle section of 1 944 m，the comprehensive maps of the Pb-Zn mineralization element association （F2） and Pb-Zn element anomalies are drawn. It is found that the comprehensive anomalies are all distributed along the NW-SE direction and are consistent with the occurrences of the known orebodies and the main ore-controlling faults. Then，combined with the geological characteristics and anomaly characteristics of the deposit，the No.Ⅰ，No.Ⅱ and No.Ⅲ key prospecting targets are delineated. The research results indicate the deep prospecting direction of the Daliangzi mining area，and also provide a certain reference for the deep prospecting prediction of similar deposits.

Key words: element association anomalies of tectonite, structure ore-controlling law, concealed orebody prediction, Daliangzi lead-zinc deposit, southwestern Sichuan

CLC Number: 

  • P618.4

Fig.1

Distribution map of main faults and deposits in the Sichuan-Yunnan-Guizhou lead-zinc metallogenic area （modified after Liu et al.，1999）"

Fig.2

Structure outline map of the Daliangzi lead-zinc deposit"

Fig.3

Geological sketch map of the Daliangzi lead-zinc deposit（modified after Zhang et al.，2014）"

Fig.4

Profile sketch and mechanical analysis diagram of F15 fault zone（modified after Wu et al.，2021）"

Fig.5

Profile sketch and mechanical analysis diagram of NW-trending F6（S） fault"

Fig.6

Profile sketch and mechanical analysis diagram of NE-trending fault"

Fig.7

Profile sketch and mechanical analysis diagram of SN-trending fault"

Fig.8

Schematic diagram of the ore-controlling structure pattern of the main ore section，the southern and northern ore sections（a） and composite style diagram of complex “negative flower shape + piercing” structure（b） in the Daliangzi lead-zinc mine"

Table 1

Element association of factors of tectonites in the 1 944 m middle section of Daliangzi Pb-Zn deposit"

因子元素组合
F1Sc、Rb、Zr、Nb、Cs、Ti、Cr、V、Li、Be、Hf、Ta、Bi、Th、U、LREE
F2Cu、Zn、Ge、Ag、Cd、In、Pb、Sb、Hg、Ga、（As、Sn、Mo）
F3Ni、As、TL、Mo、（Sb）
F4P、（Ba、U、LREE、HREE）
F5Mn、（Sr、Co、Ni）

Fig.9

Anomaly map of F2， F3， F5 element combination in the 1 944 m middle section of Daliangzi lead-zinc deposit"

Fig.10

Prospecting target prediction map of the 1 944 m middle section of Daliangzi lead-zinc mine"

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