CAJ | 학술논문

青海玉树地区中咱—中甸陆块所属的三江北段成矿带是青海省南部地区重要的成矿带。根据已有的研究成果，三江北段成矿带虽已存在大量的成矿事实，但在中咱—中甸陆块中尚未发现有价值的找矿线索。通过在青海玉树地区开展1∶5万区域地质矿产调查工作，利用遥感、地质、化探等多种方法系统搜集该地区地球化学和地质矿产资料，在对其进行综合分析的基础上，发现中咱—中甸陆块内水系沉积物中Au、Ag、Cu、Sb、Ni、Cr、Co等元素强烈富集，尤其是在中元古界长城—蓟县系宁多组中呈现出Cu-Cr-Ni-Co和Au-Ag-As-Sb 2种元素组合特征，与该区断裂构造发育，构造破碎带内基性中—酸性侵入岩和中基性火山岩分布广泛、蚀变强烈等地质特征相吻合。基于上述结论，认为三江北段成矿带内的中咱—中甸陆块成矿地质条件较好，铜、金多金属矿找矿潜力较大。
청해옥수지구중찰—중전륙괴소속적삼강북단성광대시청해성남부지구중요적성광대。근거이유적연구성과，삼강북단성광대수이존재대량적성광사실，단재중찰—중전륙괴중상미발현유개치적조광선색。통과재청해옥수지구개전1∶5만구역지질광산조사공작，이용요감、지질、화탐등다충방법계통수집해지구지구화학화지질광산자료，재대기진행종합분석적기출상，발현중찰—중전륙괴내수계침적물중Au、Ag、Cu、Sb、Ni、Cr、Co등원소강렬부집，우기시재중원고계장성—계현계저다조중정현출Cu-Cr-Ni-Co화Au-Ag-As-Sb 2충원소조합특정，여해구단렬구조발육，구조파쇄대내기성중—산성침입암화중기성화산암분포엄범、식변강렬등지질특정상문합。기우상술결론，인위삼강북단성광대내적중찰—중전륙괴성광지질조건교호，동、금다금속광조광잠력교대。
The northern three-river metallogenic belt that belongs to Zhongza-Zhongdian block in Yushu region,Qinghai province is one of the most important metallogenic belts in southern Qinghai province. Based on the previous research results, although it has already been proved that the northern three-river metallogenic belt possesses a lot of metallogenic facts,there is no valuable prospecting clue found in Zhongza-Zhongdian block till now. The regional geological investigation with 1 ∶ 50 000 scale in Yushu region,Qinghai province is carried out,and the data of geochemistry and geological mineral are collected sys-tematically based on multiple methods,such as remote sensing,geology and chemical exploration. Based on comprehensive a-nalysis on the data,it is found that the elements such as Au,Ag,Cu,Sb,Ni,Cr,Co are contained richly in the stream sediments in Zhongza-Zhongdian block. In particular,the two kinds of element combination characteristics ( Cu-Cr-Ni-Co and Au-Ag-As-Sb) are presented in Ningduo formation,Changcheng-Jixian system,middle proterozoic group,which is consistent with the frac-ture development in the region as well as its geological features,such as the widely distributed basic and intermediate-acidic in-trusion rocks and intermediate-basic volcanic rocks in structural fracture belt and the strong alteration etc. Combined with the newfound metallogenic facts above,it is considered that the mineralization geological condition of Zhongza-Zhongdian block in the northern three-river metallogenic belt is good,and the prospecting potential of copper-gold polymetallic deposit is great.