甘肃塔尔沟地区水系沉积物地球化学异常及钨找矿标志

Geochemical anomaly characteristics and W prospecting criteria of stream sediments in the area of Taergou, Gansu Province

为总结塔尔沟一带元素地球化学及异常特征,确定地球化学找矿标志,在研究塔尔沟一带成矿地质背景的基础上,采用水系沉积物元素地球化学特征及异常特征的综合研究方法,得出塔尔沟钨矿床处于区域W元素高背景带上,赋矿围岩古元古代北大河群岩石中W、Bi、Ag、Zn、Pb等元素的含量普遍较高,W、Bi、Ag元素具有变异系数值高,成矿可能性大的特征;AS1-甲1类综合异常各元素异常组合模式基本呈包含与被包含关系,具明显的热液叠加地球化学异常场特征,异常在靠近野牛滩岩体的塔尔沟形成钨矿,在钨矿的外围形成石洞沟银铅锌多金属矿。

In order to summarize the geochemical and anomalous characteristics of the elements in the Targou area and determine the geochemical prospecting indicators, based on the study of the ore-forming geological background of the Targou area, a comprehensive research method of the geochemical and anomalous characteristics of the elements in the water system was adopted It is concluded that the Talgou tungsten deposit is located in a high W element background zone of the area. The content of W, Bi, Ag, Zn, Pb and other elements in the rocks of the Paleoproterozoic Beidahe Group of the surrounding rock is generally higher. The element has the characteristics of high coefficient of variation and high possibility of mineralization;the combination pattern of the anomaly of each element of the AS1-A1 comprehensive anomaly is basically inclusive and contained, with obvious hydrothermal superimposed geochemical anomaly field characteristics, and the anomaly is close to The Taergou of the Yematan rock body forms tungsten ore, and the Shidonggou silver-lead-zinc polymetallic ore is formed on the periphery of the tungsten ore.