云南腾冲火山岩岩石学特征

详细信息

The petrology of the volcanic rocks in Tengchong, Yunnan

摘要: 腾冲火山岩群是我国著名的新生代火山岩群之一。岩相学特征表明,该火山群为典型的钙碱性系列玄武岩安山岩英安岩弧火山岩组合。它喷发于晚上新世-晚更新世,但这一时期腾冲地区已为大陆板内环境,腾冲弧火山岩的形成至少在俯冲作用停止以后60Ma,属于一种滞后型弧火山。
- 腾冲 /
- 火山岩 /
- 钙碱性系列 /
- 岩相学 /
- 云南
Abstract: The volcanic terrains in Tengchong, Yunnan are famous Cenozoic volcanic terrains in China. The (examination) of the petrography shows that the volcanic terrains in Tengchong are typical of the basalt-(andesite)-(dacite) arc volcanic rock associations of the calc-alkaline series. These volcanic rocks were erupted during the late Pliocene to late Pleistocene when the Tengchong region was developed into a continental intraplate environment. The Tengchong arc volcanic rocks were formed at least at 60 Ma in response to the termination of the subduction in this area.
- Tengchong /
- volcanic rock /
- calc-alkaline series /
- petrography /
- Yunnan