摘要
辽西金羊盆地（金岭寺－羊山盆地）南部髫髻山组陆相火山岩发育，为一套以中性为主的基性、中基性、中性火山岩组合。火山岩碱度主要为钙碱性。火山岩形成环境为活动大陆边缘区，这与本区所处大地构造位置相吻合。根据当前火山岩的研究现状，尝试性地对该盆地髫髻山组火山岩进行了火山喷发旋回层序的划分，共划分了四级火山喷发旋回层序。其中 A-A′剖面Ⅰ级 1个，Ⅱ级 5个，Ⅲ级 17个，Ⅳ级 21个； B-B′剖面Ⅰ级 1个，Ⅱ级 5个，Ⅲ级 18个，Ⅳ级 24个。
In the south ofJinlingsi-Yangshan basin of West Liaoning， continental volcanic rocks of Tiaojishan F. are developed well,which is a set of volcanic rock association: basic， intermediate-basic and mostly intermediate volcanic rocks.Alkalinity of the mostof the volcanic rocks is calc-alkalic .The volcanic rocks formed on the margin ofactive continents. According to present prograss of studies on volcanic rocks,the volcanic eruption cyclic sequenceofTiaojishan F.can be devided into 4 grades. In section A-A′ ,the volcanic eruption cyclic sequencecan be subdivided into 1 GradeⅠ， 5 GradeⅡ， 17 GradeⅢ ,and 21 GradeⅣ;and in section B-B′ ,itcan be subdivided into 1 GradeⅠ， 5 GradeⅡ， 18 GradeⅢ， 24 GradeⅣ .
关键词
金羊盆地
髫髫山组
火山喷发
旋回
层序
火山岩
Jinlingsi-Yangshan basin
Tiaojishan F.
volcaniceruption
cycle
sequence
