陕西寺沟铅锌矿新认识及潜力分析

寺沟-银洞梁背斜南翼次级褶皱非常发育,初步查明的次级褶皱就有四个,从北向南依次为北枝次级倒转向斜、北枝次级背斜、南枝次级向斜和南枝次级紧闭背斜,寺沟铅锌矿产在南枝次级紧闭背斜的南翼,是典型的背斜控矿,该背斜向西倾伏,西部仍有找矿潜力。该区褶皱发育,控矿的南枝次级紧闭褶皱相对非常紧闭,宽度小、高度低,不容易判断、识别,这就给深部找矿带来难度。用常规钻探探矿方法,准确探到南枝次级紧闭背斜(矿体)的几率较小,用钻探控制深部矿体一是要准确判断、预测深部背斜(矿体)位置;二是要从已知背斜(矿体)开始,沿矿体倾伏方向小间距向深推进。

New Understanding and Prospecting Potential of Lead-zinc Deposit in Sigou,Shanxi

The secondaryfold in the south rim of the Sigou-Yintongliang anticline was well developed, and 4 secondary folds was primarily identified,from North to South, as secondary overturned syncline in the north branch, secondary anticline in the north branch, secondary syncline in the north branch and the secondary closed anticline in the south branch.The Sigou Pb-Zn deposit lies in the south rim of the secondary closed anticline of the south branch, is typically controlled by anticline dipped westward, with prospecting potential in the west area.The folding was well developed in this area, and the controlling secondary closed folding in the south branch is tight, narrow in width and low in height relatively and difficult to identify and to prospectthe deep deposit.The chance to accuratelyfind out secondary closed anticline orebodyin the south branch is small by normal explore drilling.The keys to control deep prospecting are accurate judging and predicting for the position of the deep anticline, and advancing to the deep along the dipping direction of the orebody with small steps from the known anticline.