摘要
粤北新洲地区存在一个中—大型的褶皱式逆冲推覆构造。逆冲推覆早期矿化主要发生在Ⅰ级推覆断层带中,形成石英—碳酸盐糜棱岩型金矿床。中期矿化发生在Ⅱ级逆冲推覆断层带及下盘高角度推覆剪切带中,形成一种新类型金矿床—碎裂钠长石岩型金矿床。晚期矿化发生在Ⅲ—Ⅳ级逆冲推覆断层带中,形成碎裂富硫化物石英脉型金矿床。从矿化早期至晚期,变形环境从韧性→脆性,成矿深度和差异应力逐渐变小,形成一个完整的矿化系列。
There exists a medium-to-large-scale folded thrust-nappe structure in Xinzhou Area, Northern Guangdong Province.The early period of Au-minera-lization occurred within the I-grade thrust-nappe fault zone, which formed tim quartz-carbonate mylonite typed gold deposit. The middle period of Au-minera-lization occurred within the II-grade thrust-nappe fault zones and the highly angled thrust fault zones in their footwall, which formed a new type of gold deposit-the cataclastic albite-rock typed gold deposit. The late period of Au mineralization occurred within the Ⅲ-and Ⅳ-grade thrust-nappe fault zones, which formed the cataclastic quartz-vein (enrichment of pyrite and arsenopy-rite) typed gold deposit.From the early to late period of Au-mineralization, the environment of deformation changed from ductile to brittle; the ore-forming depth and the differential stress became smaller and smaller. All of these made up a completely minerogenetic series of gold deposit.
出处
《黄金》
CAS
北大核心
1992年第2期7-10,共4页
Gold
关键词
褶皱式
逆冲推覆构造
矿化系列
folded thrust-nappe structure
minerogenetic series
Xinzhou Area of Northern Guangdong Province
