中文摘要：

云南个旧是全球最大的锡铜多金属矿区,是与燕山期花岗岩密切相关的岩浆-热液成矿体系,构造控矿特征非常明显。本文选取松树脚、老厂和卡房矿田内的节理作为研究对象,以巷道为主并结合地表对节理进行了系统的测量和统计。研究结果表明：（1）矿区容矿节理优势展布方向为NE、NW、N-S和E-W,特别是NW节理是矿区西部新近发现的重要容矿构造。（2）花岗岩中节理发育在矿区南北部具有差异性。矿区北部节理优势单一且集中,以NW306°～312°和NE45°左右为主;南部节理优势方位复杂且多变,以NE50°、N-S、E-W、NW312°～324°和WNW280°为主。（3）碳酸盐岩中节理发育亦显示出矿区北部优势明显且简单,矿区南部优势方向复杂且多期次叠加。（4）松树脚矿田节理在垂向上具有规律性,从浅部至深部,碳酸盐岩含矿地层中浅部以NE50°为主,深部以近N-S向为主;花岗岩浅部以NW306°～312°为主,深部变为NE45°左右。成矿期的区域应力场为中晚燕山期的NW-SE向挤压应力,后期转为近N-S反向剪切应力。矿区西部新近发现的NW向节理构造是重要的容矿构造,后续的勘探和找矿工作中应引起足够的重视。矿区北部容矿节理和南部容矿节理发育规模和优势方位及成因存在差别,应加以区分。NE、N-S向节理是连通花岗岩体与碳酸盐岩类含矿层的热源、水源和矿源的通道。这些认识将指导进一步深部和外围找矿部署工作。

英文摘要：

Gejiu is one of the largest polymetallic tin ore concentration areas in the world and belongs to a granite-related magmatic-hydrothermal system.Its ore-controlling structural characteristics are very obvious.In this paper,the authors selected the joints developed in the Songshujiao orefield,Laochang orefield and Kafang orefield as the research objects,measured and statistically analyzed the modes of occurrence of joints developed in tunnels in combination with surface,and made a comparative analysis of the rock-controlling structures and ore-controlling structures.Statistics show that the variation regularity of the predominant joints within the orefields has several characteristics from north to south and in vertical direction： 1） the main predominant ore-hosting joints are in NE,NW,NS and EW directions,especially the NW-trending joints constitute an important ore-hosting structure in recent exploration and development of the western segment of the ore concentration area.2）The predominant directions of the joints developed in granite are different in the north and south parts of this mining area.The directions of joints in the north part are single and concentrated,being mainly NW306°-312° and NE45°,while orientations of the joints in the south part are complex and are mainly NE50°,N-S,EW,NW312°-324° and WNW280°.3） Statistical measurements and analyses of the joints in the carbonate rocks suggest that the joint development in the north segment is relatively simple,while that in the south part of the mining area is complex.4） The joints in the Songshujiao orefield show some regularity in the vertical direction.From surface to the depth,the orientation of joints in carbonate strata is NE50° in the shallow part and NS-striking in the depth;the orientation of joints in the granite is mainly NW306°-312°in the shallow part and NE45° in the depth.The regional stress field of middle-late Yanshanian metallogenic period in Gejiu area was NW-SE trending compressive stress and then converted into the NS