摘要
作为松辽盆地充填物中的主要部分 ,侏罗纪火山岩和沉积岩构成二套火山旋回 ,即营城旋回和火石岭旋回。火石岭旋回下部火山岩属碱性系列 ,上部为钙碱性系列 ;营城旋回下部属拉斑玄武岩系列 ,上部属碱性系列。徐家围子断陷经历了三次拉张作用和一次短暂的挤压作用。
Being the main parts in the Songliao basin's filling, Jurassic volcanic and sedimentary materials formed two volcanic cycles, Yingcheng cycle and Huoshiling cycle. The lower level of Huoshiling volcanic rock is alkalic, and the upper is calc-alkalic series. The lower level of Yingcheng volcanic rock is tholeiitic, and the upper is alkalic series. The evidence shows that the Xujiaweizi fault-depression were undergone three processes of extention and one short time of compression.
出处
《长春科技大学学报》
CSCD
2000年第3期243-245,共3页
Journal of Changchun University of Science and Technology
关键词
徐家围子断陷
火山岩
岩石化学
松辽盆地
Xujiaweizi fault-depression
lithochemistry feature
volcanic cycle
