青海叶陇沟金矿地质地球化学特征及找矿方向

青海省都兰县叶陇沟金矿位于东昆仑成矿带的东段，主要赋存于古元古界白沙河岩组与华力西期花岗闪长岩接触带部位，区内岩脉发育。通过1∶5 万水系沉积物测量，初步查明了该区元素分布规律和组合特征、异常强度和浓度分带特征，并在该地区圈出了1 处峰值较高的金异常，经对异常进行1∶2.5 万水系沉积物加密检查，缩小了异常范围，并发现了2 条蚀变破碎带，金品位2.8~7.28 g/t。从矿体形态、产状、结构构造及成矿空间分布与地质构造、地层与岩浆关系、矿体与异常分布等方面进行研究，分析矿区矿床地质、地球化学异常特征，概述矿区的地层、断裂构造体系和岩浆岩的分布情况，并探讨叶陇沟地区金多金属矿的成矿空间分布与地质构造、地层、岩浆岩的关系，建立找矿标志。

Geological-geochemical Characteristics and Prospecting Direction of Yelonggou Gold Mine, Qinghai Province

Yelonggou gold mine is located in the east of Kunlun metallogenic belt.It occurs in the early Proterozoic Baishahe rock group and Variscan granodiorite area.Through 1∶5 million stream sediment survey,we preliminary identify the distribution and assemblages of elements,unusual intensity and concentration zone characteristics in the area.Furthermore,we circle a higher peak gold anomaly in the area.Through 1∶2.5 million stream sediment,we find two alteration fractured zone which containing gold,and gold grade is 2.8～7.28 g/t.We analyze the ore body shape,occurrence,structure and spatial distribution of mineralization and geological structures,stratigraphy and magmatic relations and other aspects of ore bodies and abnormal distribution,study the formation of deposit,fracture tectonic system and distribution of magmatic rocks.On this basis,we analysis of the relationship between polymetallic ore mineralization spatial distribution and tectonics,formation,magmatic rocks.Finally,we establish the indicator for prospecting and to learn the role of the direction.