摘要
新化锑金矿床并置两套成矿构造系列。一套为走滑型成矿构造系列,形成于加里东期;另一套为下滑型成矿构造系列,形成于雪峰期。前者发育于震旦系地层中,受控于左旋脆-韧性剪切带,已知的Ⅰ、Ⅲ号脉分别为D型主张剪脉和R型张性桥脉,预测的Ⅳ、V号脉为与Ⅰ号脉平行的D型主张剪脉,Ⅵ号脉为与Ⅲ号脉平行的R型张性桥脉。后者发育于板溪群五强溪组地层中,受控于下滑型脆-韧性剪切带,其中局部所见的矿脉确定为Ⅶ号层状含金石英脉,且预测深部尚有其它平行矿脉,类似于沃溪钨锑金矿床层状矿脉的构造成因。
There exist two metallotectonic series at the Xinhua Sb -Au ore deposit,c entral Hunan province.One was controlled by a left-lateral strike-slip brittle-ductile shear zone in Sinian system,formed in Cale-donian orogeny,and called as strike-slip-type metallotectonic series,the other was controlled by a downglide brittle-ductile shear zone in the Wu qiangxi Formation of the Banxi Group,formed in Xuefeng orogeny,and called as extensional-type metallo tectonic series.the known No.ⅠandⅢore-veins in the strike-slip shear zone belong to D-type main tensile-s hear veins and R-type tensile bridge-veins respectively.The predicted No.ⅣandⅤore-veins,being parallel with No.Ⅰ,are D-type tensile-shear vein,and the predicted No.Ⅵore-vein,being parallel to No.Ⅲ,is R-type tensile bridge-vein.The predicted No.Ⅶore-vein,bedded gold-bearing quartz vein which had b een seen at local sites before,was controlled by the downglide shear zone,in which it is likely to exist th e other ore-veins in parallel with No .Ⅵore-vein,similar to the structural genesis of the bedded ore-veins at the Woxi W-Sb -Au ore deposit.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2002年第3期271-275,共5页
Geotectonica et Metallogenia
基金
国家973项目(2001CB409805)资助.
关键词
找矿预测
成矿构造系列
脆-韧性剪切带
脉状锑金矿床
湖南
构造成因
Metallotectonic series
brittle-d uctile shear zone
vein-type Sb -Au o re deposit
Xinhua county,central Hunan Province
