嵩县坪地长石矿地质特征及矿床成因浅析

Geological Characteristics and Formation Causes of the Feldspar Deposit in Pingdi Village of Songxian

嵩县坪地长石矿位于潘河—马超营大断裂附近,地处华熊台隆外方山隆断区,区内主要出露中元古界长城系熊耳群马家河组和新生界第四系,主要以断裂发育为特征,褶皱不发育。区内长石矿体赋存于华力西期侵入的正长岩中。含矿地层岩性主要为安山岩、玄武安山岩、辉石安山岩夹流纹斑岩、球粒流纹斑岩及薄层英安岩,局部夹灰绿色玄武安山岩。矿床类型为岩浆伟晶岩脉型,矿体是安山岩中的张性裂隙被含钾长石热液侵入形成伟晶岩脉而形成的长石矿床,区内长石矿的控矿因素主要为受裂隙构造控制的伟晶岩脉。

Songxian Pingdi village feldspar is located in the Pan river near Machao camp fault, located in Huaxiong platform foreign hill faulted uplift zone, zone mainly outcropped Mesoproterozoic Xiong＇er group the Great Wall department of Xujiahe formation and Cenozoic quaternary, mainly to the fracture characteristics of fold is not developed. In the region the feldspar orebodies occur in the Variscan intrusive syenite. Lithology of ore bearing strata are mainly andesite, basaltic andesite, rhyolite porphyry ayama iwa pyroxene chondrules, thin rhyolite porphyry and dacite, with local gray green basaltic andesite deposit types. Magmatic pegmatite vein type orebody is feldspar deposit andesite in Zhang fracture was K-feldspar pegmatite vein invasion and the formation of hydrothermal formation. The ore controlling factors in the region is mainly affected by the feldspar pegmatite vein fissure type structural control.