Study On The Division And Correlation Of Cambrian In Luxi Block

Luxi block is situated west of Tanlu foult in the Shandong region,Cambrian formation is continuously and good,palaeophyte fossils are veryrich,the research level is high. The Cambrian have three series and ten stages in our country, but this solution scheme exists many unreasonable factors. With the appearance of the Four serices Ten stages of Cambrian,it is necessary to make a new division to Cambrian in Luxi Block,and draw up new lightfaces paleogeography map on the new frame.Luxi Cambrian stage rock formation divide of Lower Cambrian,Middle Cambrian and Upper Cambrian.It's include Canglangpu stage,Longwangmiao stage,Maozhuang stage,Xuzhuang stage,Zhangxia stage,Changshan stage and Fengshan stage. The unit is the important basis of strata contrast.Two carbon and oxygen isotope of Xintai wennan and Jinan caishi, its evolution characteristics of carbon and oxygen isotope curve show notable positive drift at the bottom of changshan stage, which can completely compare with positive drift at the bottom of furongian series at the south China and Kazakhstan, it is a bridge for the contrast Cambrian profile of western Shandong area with the boundary stratotype section of global furongian series, and provid important evidence.Cambrian of western Shandong area is characteristic with rich trilobites fossil which the quantity is too much and its features is obvious, and the conodonts contains rich at the upper of cambiran. We encure the boundary between the Cambrian and ordovician through the research of the conodonts at the Qingzhou profile, predecessors according to the paleontology species and its distribution at the sequence,21 trilobites biological belt were divided at the Cambrian of western Shandong area, built 7 conodonts biological belt.Based on this consult and follow the international Cambrian four series program,the Luxi block include three series and eight stages:the second series(the third stage,the fourth stage),the third series(the fifth stage,Gushan stage,Guzhang stage),Furong series(Paibi stage,the ninth stage,the tenth stage).