湖北省麻城市两路口钨(钼)矿床地质特征及找矿方向探讨

Discussion on Geological Characteristics and Prospecting Direction of Lianglukou Scheelite Deposit in Macheng City,Hubei Province

麻城市两路口钨矿床为武当—桐柏—大别成矿带鄂北麻城地区首次发现的白钨矿矿床。矿体赋存于研究区近东西向发育的构造破碎带内,矿体主要受近东西向断层控制,矿体产状及品位稳定。矿体围岩主要为黑云二长花岗质片麻岩,其次为花岗斑岩脉、闪长岩脉;矿体赋存状态不受围岩岩性制约,钼矿(化)发育于钨矿体南部或下部,钨、钼矿化不共生;通过近一年的地质找矿工作,已控制的主矿脉W1资源量(3341)已达小—中型矿床规模,两路口普查区有较大的找钨矿前景。通过研究麻城市两路口白钨矿床成矿地质条件、矿化富集规律以及矿床的主要控矿因素,认为该矿床为高温热液裂隙充填型白钨矿床,主矿体南部及深部存在较大找矿前景,其找矿方向认识对开拓桐柏—大别成矿带钨矿找矿思路有一定的指示意义。

The Lianglukou Scheelite deposit in Macheng city was the first one be fond in Wudang-Tongbai-Dabie Metallogenic Belt. The scheelite ore body surrounding rock is biotite mon-zogranite gneiss. Granite-Porphyry dyke and diorite dyke was found around the scheelite orebodies. The ore body is not affected by the influence of surrounding rock. In the southernest of tungsten ore body have found molybdenum mineralization. Molybdenum,tungsten is not symbiosis,and the main controlling structures is the EW-trending faults. Scheelite orebodies occurrence in fault fracture zone. Through nearly a year of geological prospecting work,the main tungsten ore body W1（ 3341） resource has reached a small-medium scheelite deposit. It is considered that the deposit is high-temperature hydrothermal fracture filling type deposit,there have a larger ore-search prospect of Lianglukou area. This paper analyses metallogenic condition in enrichment of Lianglukou scheelite deposit,elaborates the main ore controlling factors,the ore-finding fruit develop the prospecting way of tungsten deposits in Tongbai-Dabie Metallogenic Belt.