青海省冷湖行委打柴沟西金多金属矿成矿地质特征

Metallogenic Geological Characteristics of Dachaigou West Gold Polymetallic Deposit in Lenghuxing Committee,Qinghai Province

研究区位于位于柴达木盆地西北缘、阿尔金山南坡,距冷湖镇北西方向约60km,距格尔木市约510km,大地构造位置处阿尔金构造带北东段南部(Ⅱ)、柴达木地块北缘(Ⅲ)、欧龙布鲁克微陆块(Ⅲ-1)结合部位,北侧紧邻阿尔金构造带的红柳沟—拉配泉加里东期结合带。其中的欧龙布鲁克微陆块在元古代结晶基底形成,在南华纪-奥陶纪形成稳定浅海环境的沉积盖层,在加里东期以前作为一个独立的块体存在,之后与南侧柴达木地块汇聚一起,为青海省重要的钨、铋、稀土、金成矿带,已发现的多金属矿点、铜矿点、金矿点、钛矿点均分布于该成矿带上,从区域成矿背景及成矿条件来看研究区具有较好的找矿潜力。

The research area is located on the northwest edge of the Qaidam Basin,the southern slope of the Altyn Tagh Mountains,approximately 60km northwest of Lenghu Town,and approximately 510km away from Golmud City.The tectonic location is located in the southern part of the northeast section of the Altyn Tagh tectonic belt(II),the northern edge of the Qaidam block(III),and the junction of the Oulongbuluke micro land block(III-1).The northern side is adjacent to the Hongliugou Lapaiquan Caledonian junction zone of the Altyn Tagh tectonic belt.The Oulongbuluke Microcontinental Block was formed in the Proterozoic crystalline basement and formed a stable shallow sea sedimentary cover during the Nanhua-Ordovician period.It existed as an independent block before the Caledonian period and later converged with the southern Qaidam Block,forming an important tungsten,bismuth,rare earth,and gold mineralization belt in Qinghai Province.The discovered polymetallic,copper,gold,and titanium mineralization points are all distributed in this mineralization belt,From the perspective of regional mineralization background and conditions,the study area has good prospecting potential.