苏鲁超高压变质带南部浅变质朋河石岩组地质特征及研究意义  

THE EPIMETAMORPHIC PENGHESHI FORMATION COMPLEX IN THE SOUTH OF THE JIANGSU-SHANDONG UHPM BELT AND ITS GEOLOGICAL SIGNIFICANCE

作　　者：宋明春[1] 宫述林 陈延贵 

机构地区：[1]中国地质大学研究生院,湖北武汉430074 [2]山东省第四地质矿产勘查院,山东潍坊261021 [3]山东省物化探勘查院,山东济南250013

出　　处：《地层学杂志》2003年第3期205-209,共5页Journal of Stratigraphy

基　　金：中国地质调查局国土资源大调查项目-- 1/25万<日照幅>;<烟台-威海幅>片区修测及1/50万大别造山带编图的成果

摘　　要：通过对朋河石岩组分布区的地质填图、地质剖面观察及接触关系研究 ,将朋河石岩组分为二个段 ,并指出该岩组变质程度属低绿片岩相 ,上部变质压力较高 ,达中高压相系 ;该岩组为浊流沉积产物 ,与下伏赋存榴辉岩的花岗质片麻岩呈构造叠覆接触关系。通过分析讨论认为 :朋河石岩组形成的地质背景为晋宁期大陆碰撞之后的上叠盆地 ,在三叠纪前后构造滑覆于已抬升到地表的超高压变质岩之上 。On the study of geologic mapping, geologic sections and contact relation in the area of the epimetamorphic Pengheshi Formation complex, the formation complex is subdivided into two members. The writer suggests that the Pengheshi Formation complex is turbidite, shows low grade metamorphism, and has an inbricate structural relation with granitic gneiss. The writer considers that UHPM happened before the Middle—Late Triassic, geologic background of the Pengheshi Formation complex is superposed basin and its base is the boundary of the UHPM Belt.

关 键 词：苏鲁超高压变质带 朋河石岩组 地质特征 浅变质岩系 浊流沉积 三叠纪 江苏 山东 

分 类 号：P534[天文地球—古生物学与地层学]