【作者】 邢吉辉；

【导师】 韩作振； 常象春；

【作者基本信息】 山东科技大学 ， 矿产普查与勘探， 2008， 硕士

【摘要】 鲁西地块位于郯庐断裂带以西的山东区域,寒武纪地层出露连续,露头良好,古生物化石丰富,研究程度高。随着国际寒武系四统划分的出现,有必要对鲁西地块的寒武系进行新的划分,使其与国际接轨,并在新的划分框架下作岩相古地理研究。鲁西寒武纪岩石地层自下而上分为:李官组、朱砂洞组、馒头组、张夏组、崮山组、炒米店组及三山子组C段。主要为一套陆表海碎屑岩—碳酸盐岩的沉积,主要岩性包括:砂岩、砂砾岩、页岩、微晶灰岩、颗粒灰岩、微生物灰岩、砾屑灰岩及白云岩等。根据古生物的属种和在剖面上的分布序列,鲁西寒武纪共划分了21个三叶虫生物带,建立了7个牙形石化石带。参照国际寒武纪四分方案,将鲁西地块三叶虫化石带、牙形石化石带和层型剖面的化石带进行对比,并结合碳氧同位素和海平面变化把鲁西寒武系划分为三个统八个阶:第二统(第三阶、第四阶),第三统(第五阶、鼓山阶、古丈阶),芙蓉统(排碧阶、第九阶、第十阶)。以沉积学为指导,对鲁西地块剖面进行了沉积相分析。划分了滨岸、潮坪、台地三种沉积相,识别出前滨、云坪、泥坪、砂坪、灰坪、砂泥坪、滩、滩间海、泻湖、藻坪等沉积微相。在沉积相分析的基础上,以阶为单位编制了8幅岩相古地理图,表明鲁西寒武纪总体经历了一个大的从海侵到海退的沉积旋回,并建立了碳酸盐岩台地—潮坪沉积模式。更多还原

【Abstract】 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. 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 rock formation include Liguan formation, Zhushadong formation, Mantou formation, Zhangxia formation, Gusahn formation, Chaomidian formation and Sanshanzi formation C section from bottom to top. It is a Sedimentary of epicontinental sea clasolite to carbonatite. The main lithology include: sandstone, glutenite, shale, microcrystalline limestone, grain limestone, microbialite, calcirudite and dolomite.According to the paleontology species and distribution of sequence in the section,the Cambrian formation include 21 trilobite biotic zone. Based on this consult and follow the international Cambrian four series program ,the Luxi block include three series and right 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).Many sedimentary facies were divided according to grainsize, sedimentary structures, texture, bed geometry and fossil contents.they are foreshore , dolomite flat, mud flat, sand flat, limestone flat, sand and mud flat, bank, interbank sea, lagoon, algal flat. Based on the depositional environment analyze, composed eight lithofacies paleogeographic maps,show that Luxi Block experiences the sedimentary cycle from transgression to regression, and establish the sedimentary model of Carbonate Platform- tidal flat.更多还原