甘肃省龙首山西段木头沟一带钴多金属矿地质特征及找矿前景

Geological characteristics and prospecting prospect of cobalt polymetallic deposits in mu tou gou of Long shou Shan area,Gansu Province

研究区位于华北地块之阿拉善地块龙首山裂谷带,南界为龙首山南缘断裂,北界被潮水盆地覆盖,裂谷带总体走向呈NW-SE向,属龙首山镍、铜、钴、铂族、铅锌、铁锰、磷、铀成矿带,成矿带内矿产发育,种类多,尤以黑色金属、非金属、煤等矿产为主。于研究区东侧已发现的有黑山头铁矿、清水沟铁矿、三岔沟赤磁铁矿、三岔赤褐铁矿、毛虎墩褐铁矿、独峰顶赤铁矿,在黑水沟、独峰顶、三道沟一带及黑河口子有含铜、铜镍和多金属矿化点分布。近年来,在木头沟一带调查铁矿期间,新发现一处钴多金属矿找矿靶区,找矿潜力较好。本文即是对新发现的钴矿的简单介绍,以期对后期该类型找矿具有指导意义。

The study area is located in the Longshoushan rift zone of the Alxa block in the North China block.The south boundary is the south edge fault of Longshoushan,and the north boundary is covered by the tidal basin.The overall trend of the rift zone is NW-SE,belonging to the Longshoushan nickel,copper,cobalt,platinum group,lead-zinc,ferromanganese,phosphorus,uranium metallogenic belt.There are many kinds of minerals in the metallogenic belt,especially ferrous,nonmetallic,coal and other minerals.Heishantou iron mine,Qingshuigou iron mine,Sanchagou hematite,Sancha hematite,maohudun limonite and dufengding hematite have been found in the east of the study area.Copper,copper nickel and polymetallic mineralization points are distributed in Heishuigou,dufengding,Sandaogou and Heihekou.In recent years,during the investigation of iron ore in mugou area,a new prospecting target area for cobalt polymetallic ore has been found with good prospecting potential.This paper is a brief introduction to the newly discovered cobalt ore,which is expected to be of guiding significance for the later exploration of this type of ore.