大宝山钼钨矿床西矿带地质特征及成矿预测探讨

GEOLOGICAL CHARACTERISTICS AND METALLOGENIC PREDICTION OF THE WEST BELT OF DABAOSHAN MOLYBDENUM-TUNGSTEN DEPOSIT

大宝山钼钨矿床西矿带位于大宝山矿田西部,区内已发现3条钼矿体(Ⅰ、Ⅱ、Ⅲ号矿体),局部圈出钨矿体以及钨钼共生矿体,这些矿体均赋存于燕山二期花岗闪长斑岩体与燕山一期次英安斑岩体接触带中,矿床成因类型主要为斑岩型,次为矽卡岩型,其中斑岩型钼矿体分布范围广,矽卡岩型钼钨矿体多呈透镜状分布范围有限。该区矿产勘查应注重在大宝山斑岩体东侧向地下延伸部位、大宝山斑岩体东北部、船肚岩体边部延深地段和白面石地区,斑岩型钼矿是勘查重点,其次也要重视矽卡岩型钼钨矿。

The western belt of Dabaoshan molybdenum-tungsten deposit is located in the west of Dabaoshan ore field. Three molybdenum ore bodies(Ⅰ,Ⅱ,and Ⅲ ore bodies) have been discovered in the area,and tungsten ore bodies and tungsten-molybdenum symbiotic ore bodies have been partially encircled. The ore bodies are all presented in the contact zone between Yanshan Phase Ⅱ granodiorite porphyry and Yanshan Phase ,and the diagenetic type is mainly porphyry type,followed by skarn type. The molybdenum ore body has a wide distribution range,and the skarn type molybdenum-tungsten ore body has a limited lenticular distribution. The mineral exploration in this area should focus on the eastward extension of Dabaoshan porphyry body,the northeastern part of Dabaoshan porphyry body,the deeper section of the stern rock mass and the white noodle area. The porphyry molybdenum deposit is the focus of exploration. then,we must pay attention to skarn type molybdenum-tungsten ore.