摘要
滇黔桂"金三角"地区,自古生代以来,存在着5个角度不整合和平行不整合面。角度不整合是板内褶皱造山变形,平行不整合是板内造陆变形的重要记录。它们是一种容易失稳的界面。在强烈构造变动背景中,其后期转化的重要型式是形成脆性拆离断层带(中浅构造层次)、韧性剪切带(中深构造层次)及其它们之间的韧-脆性转换带。这些后期转化的演化对此区金矿形成有着重要的影响。表现在:①强化流体-岩石间相互作用;②促进金成矿流体的再次运移和聚集,③为金成矿提供定位场所。
5 angular and parallel unconformities have occurred in strata in the contiguous area of Yunnan- Guizhou- Guangxi provinces since Palaeozoic era.Angular unconformity belongs to an intraplate folded- orogenic deformation.Parallel unconformity is the record of intraplate epeirogenic deformation.Both are an unstable contact and always transfer into brittle detachment fault(when located at mid- superstructure level),ductile shear fault(while located at mid- infrastructure level) during later tectonic movement.Th...
出处
《大地构造与成矿学》
EI
CAS
CSCD
2000年第S1期52-57,共6页
Geotectonica et Metallogenia
基金
系云南省省院省校科技合作项目!(编号YK98008-1)部分研究成果.
关键词
不整合
后期转化
金矿
滇黔桂毗邻区
Unconformity
later transformation
Au metallogenesis
contiguous area of Yunnan- Guizhou- Guangxi provinces