安徽歙县浅变质岩系微古植物化石及其形成时代讨论  

Microflora and its age in the low-grade metamorphic rocks in She county,Anhui province

作　　者：罗能辉[1] 颜铁增 蒋振频[1] 

机构地区：[1]东华理工学院地球科学系,江西抚州344000 [2]浙江省地质调查院,浙江杭州311203

出　　处：《铀矿地质》2007年第5期268-274,297,共8页Uranium Geology

摘　　要：文章论述了安徽歙县浅变质岩系微古植物化石的产出特点(计有27属40种)和它的时代意义,分析研究了西村组和昌溪组的优势属,分别为Leiominuscula,Leiofusa,Asperatopsophos-phaera,Germinosphaera,Melanocyillum和Germinosphaera,Leiominuscula,Leiopsophosphaera,Triangumorpha,Leiofusa等各5属。通过对比论证,提出西村组、昌溪组形成的地质时代应为中元古代蓟县纪。Microflora （contain 27genera and 40 species） from the low-grade metamorphic rocks in She county of Anhui province and its age significance are discussed in this paper. The dominant genera of the microflora, from the Xicun formation are Leiomlnuscula, Leiofusa, Asperatopsophosphaera, Germinosphaera and Melanocyillum. The Changxi formation contains five dominant genera, including Germino- sphaera, Leiominuscula, Leiopsophosphaera, Triangumorpha and Leio fusa. The analysis on microflora comprison suggests that the age of the low-grade metamorphic rock which bears the microflora should be Mesoproterozoic Jixianian.

关 键 词：浅变质岩 微古植物化石 中元古代蓟县纪 安徽歙县 

分 类 号：P588.3[天文地球—岩石学]