内蒙古吉格尔矿床地质地球化学特征及意义

Geological and geochemical characteristics and significance of Gigl deposit in Inner Mongolia

内蒙古西乌旗吉格尔矿床位于贺根山缝合带内,构造位置处于滨太平洋构造域大兴安岭矿物带上,该区地质构造活动强烈,各类矿物广泛分布。吉格尔矿物中Si、K以及碱质成分含量高于其它地区矿物平均水平,Al2O3含量相对较低,为弱过铝质矿物负Eu异常明显。在地球化学构造环境判别图解上,吉格尔矿区地质样品数据落在A2型区域,反映其形成于后造山伸展环境。

The Jigel deposit in Xiwuqi, Inner Mongolia, is located in the Hegenshan suture zone and in the Daxing＇anling mineral belt of the coastal Pacific tectonic domain. The contents of Si, K and alkaline components in Jigel minerals are higher than the average level of other minerals, while the content of Al2O3 is relatively low. The negative Eu anomaly of weak peraluminous minerals is obvious. In the geochemical tectonic environment discriminant diagram, the geological sample data of Jigel mining area fall in A 2 area, reflecting its formation in the post-orogenic extensional environment.