中国地质2024，Vol.51Issue(2)：399-425,27.DOI:10.12029/gc20200828002
黔西北青山铅锌矿床构造控矿机理及其对深部找矿的启示
Structural ore-controlling mechanism of the Qingshan lead-zinc deposit in northwestern Guizhou,China and its implications for deep prospecting
摘要
Abstract
This paper is the result of mineral exploration engineering. [Objective]The Qingshan medium-size Pb-Zn deposit is located in the middle of the Weining-Shuicheng metallogenic sub-belt in the southwest margin of the Yangzi Block.The ore-body of the Qingshan deposit is strict controlled by structure and the resource potential is huge.[Methods]Based on the theory and method of orefield geomechanics,this research has revealed the mechanism of structural ore control by the fine survey of large-scale structural profile,the identification of mechanical properties of typical ore-controlling structures in different directions and the screening of structures in different periods and orders,combined with the characteristics of regional tectonic stress field.[Results]The results show that the principal compressive stress direction of the mining area since the Indosinian had changed from NE-SW-trending to NW-SE-trending to NE-SW-trending to near EW-trending,sequentially forming tectonic systems of the early NW tectonic belt,the NE tectonic belt,the late NW tectonic belt and the SN tectonic belt in turn.By the analysis of ore-controlling structure and the discussion of its relationship with mineralization,the metallogenic structural system of the north-east tectonic belt has been determined,and the hierarchical ore-controlling regularity of structure is revealed,it is,the northwest-trending Weining-Shuicheng fault and Weining-Shuicheng anticline are the first-grade ore-controlling structures,which control the distribution of the Weining-Shuicheng metallogenic sub-belt or orefield;The NW-trending faults(F1 and F2)derived from the Weining-Shuicheng fault,control the distribution of the deposit or orebody group,and are the second-grade ore-controlling structures in the mining area;The interlayer fracture zones between F1 and F2 faults directly control the feature and attitude of orebodies,which is the third-grade ore-controlling structure in the mining area;The joint fissures on the sides of orebodies control the ore-veins,which is the fourth-grade ore-controlling structure.[Conclusions]The regularities of structural classification control are obvious for the Qingshan Pb-Zn deposit,which is mainly controlled by the ore-controlling structures of four grades,and has formed the four types of mineralization styles.关键词
控矿作用机理/成矿构造体系/构造控矿模式/矿产勘查启示/青山铅锌矿床/黔西北/矿产勘查工程Key words
metallogenic tectonic system/ore-controlling mechanism/model of tectonic ore control/mineral exploration implication/Qingshan lead-zinc deposit/northwestern Guizhou Province/mineral exploration engineering分类
天文与地球科学引用本文复制引用
宋丹辉,韩润生,王峰,王明志,何治,周威,罗达..黔西北青山铅锌矿床构造控矿机理及其对深部找矿的启示[J].中国地质,2024,51(2):399-425,27.基金项目
国家自然科学基金项目(41572060)、云岭学者资助项目(2014)、云南省矿产资源预测评价工程实验室(2010)及云南省地质过程与矿产资源省创新团队项目(2012)联合资助. Supported by National natural Science Foundation Project(No.41572060),Projects for Yunling Scholars(2014),Yunnan Engineering Laboratory of Mineral Resources Prediction and Evaluation(YM Lab)(2010)and Geological Process and Mineral Resources Innovation Team(2012). （41572060）
