SEDIMENTARY ENVIRONMENT ANALYSING OF ROCKS IN TAIYANGKING GROUP,CAMBRIAN-ORDOVICIAN SYSTEMS, THE NORTHERN PART OF ROUERGAI,SICHUAN
Jiang Qigang(Dep.of Earth sciences)
Taiyangding Group, Cambrian-Ordovician systems,is an important gol- uranium bearing formation in the northern part of Rouergai, It consists ofcarbonaceous silicalites and carbonaceous slate,In Taiyangding Group rocks,manysedimentary fabrics are preserved such as massive structure,laminated structtire,spherulitic structure ,autobreccia structure,nodule structure,colloform texture. Basedon the rock type ,rock association,sedimentary structure,the characteristics ofpetrochemical,trace elements,REE,it may be regard as the rocks in Taiyangding Groupformed at the starved epicontinentaI trough in passive continental margin,stagnant andbathval sedimentarv environment.
【CateGory Index】： P534.41