嵩县螃蟹沟隐爆角砾岩体与钼金矿化成因探讨

Discussion on the genesis of cryptoexplosion breccia and Mo-Au metallization in Pangxiegou of Song county

螃蟹沟隐爆角砾岩体是河南省嵩县西北部众多含钼、金角砾岩体之一,这些角砾岩体具有成群、成带分布的特点。螃蟹沟角砾岩体的定位与分布受北西向背形、北西向和北东向断裂构造的复合控制,由燕山期钙碱性岩体与岩脉的侵入,以及随后发生的隐蔽爆发-坍塌作用而生成了角砾岩体。其中包括了震碎角砾岩、隐爆角砾岩、侵入角砾岩及坍塌角砾岩。岩体被后期断裂构造作用所复合叠加,致使钼、金富集成矿,形成"多型一体"的钼金矿床。

The cryptoexplosion breccia body in Pangxiegou is one of the many Mo and Au bearring breccia bodies in the northwest of Song county, Henan province, and the breccia body have the characteristic of banding and grouping distribution. The localization and distribution of breccia body are controlled by the NW antiformal anticline and the NW and NE faulted structure. It was formed by the intrusion of Yan- shanian calc-alkalic pluton and vein and the subsequently cryptoexplosion and collapsing. The breccia body is composed of shattering breccia, cryptoexplosion breccia, intrusion breccia and cave breccia. The rock body and the later structure superimposing and compounding resulted in Mo-Au enrichment and metalli- zation, build uping ＂multi-type and one body＂ Mo-Au deposit series.