Element Association Anomalies of Tectonite and Prediction of Concealed Orebodies in the 1 944 m Middle Section of Daliangzi Pb-Zn Deposit，Sichuan
Received date: 2021-06-03
Revised date: 2021-09-27
Online published: 2022-03-07
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.
Haifeng WANG , Hongsheng GONG , Zhixing FENG , Runsheng HAN , Tianzhu DING , Xinyue ZHAO , Peng WU . Element Association Anomalies of Tectonite and Prediction of Concealed Orebodies in the 1 944 m Middle Section of Daliangzi Pb-Zn Deposit，Sichuan[J]. Gold Science and Technology, 2021 , 29(6) : 781 -794 . DOI: 10.11872/j.issn.1005-2518.2021.06.068
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