摘要
广西凌云县明山金矿属桂西北地区微细粒浸染型金矿 ,矿体赋存在中三叠统百蓬组砂岩和泥质粉砂岩的构造破碎带中 ,具有黄铁矿化、毒砂化和绢云母化等围岩蚀变 ,金与伴生的银、锑、汞、砷等元素关系密切。矿区内出露的石英斑岩 ,具有富硅、富钾、铝过饱和的特点 ,系古老的花岗岩经燕山期构造作用下重熔而成 ,它不仅是部分金的来源 ,且为成矿作用提供了持续、足够的热源。
The Mingshan gold deposit of Guangxi is microfine grained disseminate type gold deposit at Westnorthern of Guangxi, The ore body occurred in the fractured zone of sandstone and mud-microsandstone at middle Triassic Baifeng Fm., It haswallrock alteration that include pyritization and sericitization et.al, Au is close to the associated elements such as Ag?Sb?Hg?As. It has a feature the rich-Si?rich-K and full-Al in guartz-porphyry who was overlying on mine, It was remelted by old granite under structural action of Yenshan age, It is not only sources of gold, but also provide enough hot sources for mineralization.
出处
《广西地质》
2001年第4期22-28,共7页
Guangxi Geology
