|Table of Contents|

Metallogenic Regularity of Tangdan Copper Deposit and Its Enlightenment for Prospecting of Yinmin Copper Mine in Dongchuan Area of Yunnan, China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2020年第04期
Page:
510-525
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Metallogenic Regularity of Tangdan Copper Deposit and Its Enlightenment for Prospecting of Yinmin Copper Mine in Dongchuan Area of Yunnan, China
Author(s):
ZENG Rui-yin1; 2; 3;  ZHU Xin-you3*;  WANG Bang-min4;  LIU Wen-jian4;  YANG Feng-jun4;  ZHANG Jiao-jiao4;  ZHANG Hua4;  YAN Yun-fei4;  GAO Xing-ying4;  WANG Jun5;  XIAO Jian3; 6
(1. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China;2. Sinotech Minerals Exploration Co., Ltd., Beijing 100012, China; 3. Beijing Institute of Geology for Mineral Resources, Beijing 100012, China; 4. Yunnan Jinsha Mining Co., Ltd., Kunming 654100, Yunnan, China; 5. Liangshan Mining Co., Ltd., Liangshan 615100, Sichuan, China; 6. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China)
Keywords:
copper deposit;  supply system;  transverse fracture;  ore-forming environment;  multi-layer prospecting;  primary halo;  Dongchuan-type;  Taoyuan-type;  Yunnan
PACS:
P612
DOI:
10.19814/j.jese.2020.04016
Abstract:
Tangdan copper deposit is located in Kangdian tectonic belt of the western Yangtze Block. The Dongchuan-type and Taoyuan-type copper ore bodies are distributed in dolomite of Mesoproterozoic Luoxue Formation and carbonaceous slate of Mesoproterozoic Heishan Formation, which are stratiform and quasi-stratiform, and controlled obviously by lithology with multi-layer ore-bearing characteristics. Through combing the controlling factors, the metallogenic regularity was summarized. The results show that Dongchuan-type(Ⅰ# and Ⅱ#)and Taoyuan-type(Ⅳ#)copper ore bodies are controlled by transverse fractures with good connectivity. In copper mineralization strong area, NW-trending transverse fractures well develop. The sand dolomite of Luoxue Formation with good permeability and the carbonaceous slate of Heishan Formation are the main ore-bearing layer, and have obvious characteristics of lithologic control orebody. According to sedimentary environment identified by the ratios of V/Cr, V/(V+Ni)and Ce/La of surrounding rocks, the oxidation-reduction interface is favorable area for mineralization. Combined with the prospecting results of Dongchuan ore field in recent years, based on the multi-layered metallogenic system, taking Yinmin copper mine as an example, the multi-layer prospecting was analyzed. It is found that the transverse fractures well develop in Yinmin copper mine with about 12 pieces per 400 m, and part is relatively dense with about 9 pieces per 100 m. Copper mineralization exists in cinerous dolomite of the second member of Luoxue Formation and carbonaceous slate of Heishan Formation. The contents of Cu in several primary halo samples are more than 2 000×10-6. It can be predicted that the upper layer of Dongchuan-type stratified copper ore body has the potential to search for Dongchuan-type stratabound vein copper ore body and Taoyuan-type copper ore body.

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Last Update: 2020-07-27