内蒙古巴林左旗东山湾钨锡铍矿床地质特征及找矿前景

Geological characteristics and prospect of mineral exploration of Dongshanwan W-Sn-Be deposit at Balinzuo county of Inner Mongolia

对巴林左旗东山湾钨锡铍矿床的地层、构造及侵入体的分布特征、矿体在平面及垂向上的成矿规律及矿化分带进行了综合研究.该区处于天山—大兴安岭海西褶皱带锡多金属成矿带上,火山盆地边缘环形隆起中,区域火山活动强烈;地层及岩体中成矿元素含量较高,是地层-构造-岩体综合作用区;矿脉垂向上具有"线脉-细脉-大脉-细脉-尖脉"的分带模式,高品位的钨(w(W)0 25%～1 8%)锡(w(Sn)0 08%～0 17%)铍(w(Be)0 05%～0 15%)等均出现在大脉带,矿化信息明显,矿区深部具良好的找矿前景.

Comprehensive study is carried out which includes strata, structures, intrusions, mineralization patterns and zoning at Dongshanwan W-Sn-Be deposit at Balinzuo county of Inner Mongolia. The deposit is located at a ring uplift of volcanic basin margin in a tin polymetallic mineralization zone along Hercynian Tianshan-Daxinganling fole belt. Intense vocalic activity and high content of oreforming elements indicate that the deposit undergoes a complex geological process consisting of sedimentation, structure and magmatic activity. Vertically, a typical ore veins zoning is shown including line vein, thin vein, wide vein, thin vein, tip vein. There is a wide existence of high grade W(0.25%～1.8%), Sn(0.08%～0.17%)and Be(0.05%～0.15%)all in veins. With the abundant mineralization information a good prospects of mineral exploration in deep mine is suggested.