摘要
东秦岭丹凤岩群位于秦岭商丹构造带上 ,主体形成于新元古代 (10 0 0Ma～ 80 0Ma) ,其中变质基性火山岩的岩石地球化学特征表明为岛弧型火山岩系 ,而非蛇绿岩 ,其形成于秦岭造山带新元古代主造山期板块构造体制下的活动陆缘古岛弧构造环境。
Located on the Shangdan tectonic zone, the Danfeng Group complex in the East Qinling mountains was on whole formed in Newproterozoic (1*!000～800Ma). Petrogeochemical characterisitics of metabasic volcanic rocks within the complex of this group show that, instead of being ophiolite, they are island-arc type volcanic rocks formed in an active epicontinental paleoisland-arc tectonic environment under the plate tectonic system of Newproterozoic main orogenic epoch in Qinling orogenic belt.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2001年第2期180-188,共9页
Acta Petrologica et Mineralogica
基金
国家自然科学基金项目! (4 9732 0 80 )
原地质矿产部区调填图项目资助
