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。
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.
出处
《沉积与特提斯地质》
CAS
CSCD
2003年第4期56-61,共6页
Sedimentary Geology and Tethyan Geology
关键词
腾冲
火山岩
钙碱性系列
岩相学
云南
Tengchong
volcanic rock
calc-alkaline series
petrography
Yunnan
