河南卢氏夜长坪钼钨矿床成矿条件及找矿远景分析

Ore-forming Conditions and Prospecting of the Yechangping Mo-W Deposit in Lushi County,Henan Province

夜长坪钼钨矿床是豫西地区进行隐伏矿预测并取得找矿成功的典型案例。通过对矿床特征及成矿控制条件的分析研究,认为该钼钨矿床位于地幔隆起与凹陷区之间的地壳厚度增大部位,受矿源层官道口群龙家园组白云岩,近东西向和北东向断裂构造交汇部位侵入的燕山期中酸性隐伏小岩体控制,矿体就位于隐伏小花岗斑岩体接触带的夕卡岩中,属(大型)斑岩-矽卡岩型钼钨矿床。在此基础上,结合矿区外围的地质物化探测量成果,提出夜长坪钼矿区外围南部十八盘-大角寺一带为钼钨找矿的远景区。

Yechangping Mo-W deposit is the typical case of successfully hunting buffed ores in the west region of Henan Province. According to the research on ore-forming characters and conditions, it is suggested that the deposit field is located in the accretion part in the crust between the uplift and concave of the mantle. And the deposit is controlled by the source bed （Longjiayuan Fm. dolomite of Guandaokou Group） and the small hided granite-porphyry intruding into the intersection of faults with EW and NE direction in Yanshan period. It belongs to porphyry-skarn type deposit. Combining with the geo-phisical and geo-chemical anormalies outside the ore field, Shibapan-Dajiaosi area to the south of the ore field is proposed as Mo-W prospecting place.