摘要
南天山黑英山-库勒湖洋壳残片内发育一套具洋岛特征的火山岩,岩石组合为碱性中基性火山碎屑岩和熔岩,形成时代为泥盆纪—早石炭世,其中基性熔岩岩石化学特征具高钾和高钛特征,稀土元素具轻稀土富集、重稀土亏损的右倾稀土分布型式,微量元素除Y、Yb外,其它元素具富集的大陆隆起洋岛碱性玄武岩特征,说明泥盆纪—早石炭世南天山洋盆形成新生洋壳,洋盆具一定规模.
There is one set of ocean island volcanic rocks in Heiyin mountains-Kule lake oceanic basin of southern Tianshan,the rocks combination is alkali intermediate-basic pyroclastic rock and lava,petrogenetic age is Devonian-early carboniferous.And the petrochemistry characteristics of intermediate-basic lava is high K and Ti,there are depleted in HREE and enriched in LREE,characteristics of microelement is all elements is enriched except Y,Yb,it belongs to raise ocean island alkali basalt.It is show that southern Tianshan ocean basin forms new ocean crust sequentially in Devonian-early carboniferous era and has considerable size.
出处
《新疆地质》
CAS
CSCD
北大核心
2010年第3期236-241,共6页
Xinjiang Geology
基金
由博士后基金(200902617)
"十一五"国家科技支撑计划重点项目(编号2006BAB07B00)资助
关键词
新疆
南天山
洋岛
基性熔岩
Southern Tianshan of Xinjiang
Ocean Island
Basic Lava
