Microorganisms Linked to Neoproterozoic Microspar Carbonate Sedimentation in the Jilin-Liaoning Area  

作　　者：GEMing KUANGHongwei MENGXianghua GeorgeFURNISS 

机构地区：[1]InstituteofSedimentaryBasin,ChinaUniversityofGeoscience,XueyuanRoad,Beijing100083,China [2]YangziUniversity,Nanjing,Jiangsu,China210000 [3]GeologyDepartment,UniversityofMontana,Missoula,Montana59812,USA

出　　处：《Acta Geologica Sinica(English Edition)》2004年第3期784-789,共6页地质学报（英文版）

基　　金：This study was sponsored by the Key Program of International Scientific and Technological Cooperation of Ministry of Science and Technology of China(2001 CB 711002);the National Natural Science Foundation of China(No.4017043);the International Geological Correlation Program(IGCP)project 447.

摘　　要：Molar-tooth carbonate refers to a sort of rock that has ptygmatical folded structure comparable to the ivory. This kind of carbonate exists in a special time range (from Middle to Neoproterozoic). Its origin and the possibility to use it in stratigraphic correlation of the paleocontinent is the key task of the IGCP447, a project on Proterozoic molar tooth carbonates and the evolution of the earth (2001-2005). The importance lies in that the molar-tooth structure is the key to solving problems related to Precambrian biological and global geochemical events. The molar-tooth structure is associated with microorganisms. Development and recession of such carbonates have relations with the evolution process of early lives and abrupt changes in sea carbonate geochemistry. In recent years, based on researches on petrology, geochemistry and Sr isotope of molar-tooth carbonate in the Jilin-Liaoning and Xuzhou-Huaiyang area, the authors hold that it can be used as a marker for stratigraphic sequence and sedimentary fades analyses.Molar-tooth carbonate refers to a sort of rock that has ptygmatical folded structure comparable to the ivory. This kind of carbonate exists in a special time range (from Middle to Neoproterozoic). Its origin and the possibility to use it in stratigraphic correlation of the paleocontinent is the key task of the IGCP447, a project on Proterozoic molar tooth carbonates and the evolution of the earth (2001-2005). The importance lies in that the molar-tooth structure is the key to solving problems related to Precambrian biological and global geochemical events. The molar-tooth structure is associated with microorganisms. Development and recession of such carbonates have relations with the evolution process of early lives and abrupt changes in sea carbonate geochemistry. In recent years, based on researches on petrology, geochemistry and Sr isotope of molar-tooth carbonate in the Jilin-Liaoning and Xuzhou-Huaiyang area, the authors hold that it can be used as a marker for stratigraphic sequence and sedimentary fades analyses.

关 键 词：molar tooth carbonate NEOPROTEROZOIC sedimentary environment MICROORGANISMS ORIGIN 

分 类 号：P534.6[天文地球—古生物学与地层学] Q913[天文地球—地质学]