陕西省洛南县莲花沟钼矿地质特征及找矿标志

Geological Characteristics and Prospecting Criteria of Lianhuagou Molybdenite Deposit in Luonan County,Shaanxi Province

西起陕西省的金堆城,东至河南省栾川南泥湖—三道庄—上房沟、嵩县雷门沟地区的华北地台南缘的东秦岭钼矿带东段河南境内,产出了南泥湖、三道庄、上房沟等超大型钼矿床,但同样位于该钼矿带的陕西境内,找矿却没有更大突破。从陕西省洛南县莲花沟矿区的区域地质背景入手,对其构造、岩浆岩、地球物理、地球化学及矿化特征进行研究分析认为,莲花沟矿区燕山期的莲花沟花岗斑岩及寨子沟闪长玢岩岩体具有多期次脉动侵入特征,北东向次级断裂与成矿关系密切。通过对该区找矿因素的研究,指出找矿有利地段,进一步指导该区的找矿工作,以达到重大找矿突破。

The East Qinling Mo belt in the South of North China plate lies in the area from Jinduicheng of Shaanxi Province to Nannihu-Sandaozhuang-Shangfanggou in Luanchuan county and Leimengou in Song county of Henan Province. Its eastern part in Henan Province has many large to superlarge Mo deposits such as Nannihu, Sandaozhuang, Shangfanggou, etc. , but its western part area in Shaanxi Province barely has any large or superlarge Mo deposits. The magmatic bodies and petrochemistry characteristics of the two parts of the Qinling Mo belt are very similar. Why is there so much difference in Mo deposits？ Regional geology settings, structure, magmatic body, physical geography, geochemistry and mineralization characteristics of Lianhuagou Mo deposit in Luonan county, Shaanxi Province were studied; the polyphase impulsive intruding motion trait of Lianhuagou granite-porphyry and Zhaizigou dioriteporphyrite was identified; the close relation between the North-East sub-fault and the mineralization was found. Research of the prospecting factors of Lianhuagou Mo deposit can help us finding potential prospecting areas or even achieving great breakthrough.