安徽枞县拨茅山-牛头山铜矿床地质特征及找矿方向

Geology and prospects of the Bamaoshan and Niutoushan copper deposits in Zongyang, Anhui

拨茅山 牛头山铜矿床的的赋矿岩石为中生代的火成岩系。侵入岩—潜火山岩—火山岩构成完整的侵入 喷发系列。该矿床可分为火山气液 沉积铜矿床和斑岩型铜矿床两种类型。在成矿前期 ,陆相火山岩在湖底发生火山喷气、火山热泉以及火山热水沉积。潜火山岩的侵入 ,伴有长期热液循环活动 。

The Bamaoshan and Niutoushan copper deposits in Zongyang, Anhui are hosted in the Mesozoic igneous rock series, which are built up of a complete sequence of intrusive rocks, subvolcanic rocks and volcanic rocks. The copper deposits may be grouped into two types: the volcanic exhalative sedimentary copper deposit and porphyry copper deposit. The volcanic exhalative, hot spring and volcanic hydrothermal sediments were accumulated at the bottom of lakes during the early mineralization. The intrusion of subvolcanic rocks and long term hydrothermal activity led to formation of the porphyry related copper deposits in the extensional dominated accommodation spaces.