山东五莲七宝山窑头隐爆角砾岩筒矿化特征及意义

Mineralization Characteristics and Its Significance of Yaotou Crypto-explosive Breccia Rock Pipe in Qibaoshan Area in Wulian County

五莲七宝山地区岩浆活动频繁,具有多期次岩浆活动。环状断裂与辐射状断裂发育,形成七宝山复式火山机构。隐爆角砾岩是火山活动的产物,具有良好的成矿机制和控矿作用,窑头隐爆角砾岩筒成矿时代为燕山晚期。对窑头隐爆角砾岩筒的产状、分布、规模、围岩蚀变等地质特征进行了分析,推断窑头铜(金)矿为隐爆角砾岩型低温热液小型矿床。

Yaotou crypto - explosive rock pipe was found in general survey of Nanling cooper deposit in Qibaoshan area in Wulian County. Magmatic activities are very frequent in this area accompanying with multi - phase magmatic activities. Qibaoshan complex edifice was formed by well developed circle and radial faults. It has good mineralization and ore - controlling mechanism. The mineralization age of Yaotou cypto - explosive breccia pipe was the late Yanshan period. Through study on geological characteristics, such as occurrence, distribution, size and alteration of country rocks of Yaotou crypto- explosive breccia rock pipes, it is concluded that Yaotou copper （gold） deposit solution belonged to low temperature crypto -explosive breecia type accompanying with sub -volcanic complex.