青海都兰—玛多地区金多金属矿成矿特征及潜力分析

Analysis on the Metallogenic Characteristics and Potential of Gold Polymetallic at Dulan-Maduo Area in Qinghai Province

都兰-玛多地区属于秦祁昆早古生代造山系与青藏北特提斯晚古生代—中生代造山系的交接部位,区内具有多期不同类型构造活动,岩浆活动频繁,成矿地质条件优越。在对都兰-玛多地区区域地质背景综合研究的基础上,从化探方面对区内多金属矿床的成矿地质条件进行了分析,该成矿带金、铜、铅锌、铬、钼、锑等矿产找矿潜力巨大,并综合考虑区域矿床成因类型、地球化学、地球物理及矿产分布特征,将成矿带划分为6处(柴北缘Au-Pb-Zn-Co成矿带、昆北Fe多金属成矿带、昆中Au成矿带、昆南Cu-Co-Au成矿带、布青山—阿尼玛卿Cu-Au成矿带及鄂拉山Pb-Zn-Au-Ag成矿带),圈定出4个成矿远景区(柯柯赛Pb-Zn成矿远景区、满丈岗Au成矿远景区、哈图Cu-Co-Au成矿远景区及马尔争成矿远景区),这为该区域下一步找矿提供了方向。

Dulan-Maduo area is located at transition area of Qinqikun Early Paleozoic made mountains and the Tibetan tethys north mountains late Paleozoic-Mesozoic era,and the study region had various different types of tectonic activity with frequent magmatic activity and superior metallogenic geological condition.On the basis of comprehensive investigation of geologic background in the study region,we analyzed the ore-forming geological conditions of muti-metallic deposit from the aspect of geochemical exploration in the Dulan-Maduo area.The results showed that the metallogenic belt for gold,copper,lead and zinc,chromium,molybdenum and antimony mineral prospecting potential was tremendous.In addition,comprehensive consideration of regional ore deposit genetic types of geochemistry,geophysics and mineral distribution characteristics,it was divided six metallogenic belt （Chaibeiyuan Au-Pb-Zn-Co metallogenic belt,Kunbei Fe polymetallic metallogenic belt,Kunzhong Au metallogenic belt,Kunnan Cu-Co-Au metallogenic belt,Buqingshan-Animaqing Cu-Au metallogenic belt,and Elashan Pb-Zn-Au-Ag metallogenic belt）and four metallogenic prospective areas （Kekesai Pb-Zn minerogenic prospect,Zhangmangang Au metallogenic prospect,Hatu Cu-Co-Au metallogenic prospective and Maerzheng metallogenic prospect）,which will provide the next step prospecting direction for the study area.