辽东地区古元古代侵入岩特征及构造岩浆大陆动力学演化

辽东古元古代侵入岩广泛分布于太子河凹陷以南的营口、宽甸、丹东、桓仁等地。本文概述了侵入岩地质、岩石、岩石化学及地球化学等特征 ,探讨了其源区有幔源型、壳幔混源型、壳源型的属性。岩浆演化规律为：造山前富 Mg质玄武岩、拉斑玄武岩系列与钙碱系列双向演化；造山期由中酸性→酸性，由钠质→钾质；造山后崩塌期由基性→中性→酸性，由拉斑玄武岩系列→钙碱系列，由钠质→钾质。构造岩浆大陆动力学演化过程和模式为造山前毗芦寺超基性－基性杂岩侵喷就位，造山早期条痕状花岗岩同构造底劈侵位，造山主期片麻状黑云－二云母二长花岗岩同构造中高位侵入，造山晚期块状花岗闪长岩－二长花岗岩组合高位侵入，造山期后构造崩塌期辉长－辉绿岩组合、闪长岩－斜长花岗岩－钾长花岗岩组合伸展就位。

CHARACTERISTICS OF PALEO PROTEROZOIC INTRUSIVE ROCKS AND CONTINENTAL DYNAMIC EVOLUTION PATTERN OF TECTONOMAGMA IN EAST LIAONING

In East Liaoning,Paleoproterozoic intrusive rocks are widely distributed in Yingkou,Kuandian,Dandong,Huairen,etc., to the south of Taitzehe depression.In the paper,the characteristics on geology,lithology,lithochemistry and geochemistry of the intrusive are briefly discribed.Properties of their source area:mantles source type,crust and mantle mixed type,crust type are discussed.The evolution regularity of magma is concluded that:in pre orogenic period,Mg rich basalt,tholeiite series and calc alkaline series double evoluted;in orogenic period,evoluted from intermediate acid to acid,from sodic to kali;in post orogenic period(tectonic collapse period),evoluted from basic to intermediate to acid,from tholeiite series to calc alkaline series,from sodic to kali.The continental dynamic evolution pattern of tectonomagma was advanced that in pre orogenic period,Bilusi ultrabasic basic complex intruded,extruded and emplaced; in the early stage of orogenic period,streak granite syntectonic diapir emplaced;in the main stage of orogenic period,gneissic biotite two mica adamellite syntectonic mid high intruded;in the late stage of orogenic period(tectonic collapse period),gabbro diabase association,diorite plagiogranite moyite association extended and emplaced in th e end.