陕西韩城寒武系张夏组和三山子组三叶虫动物群  

UPPER MIDDLE-UPPER CAMBRIAN TRILOBITES OF HANCHENG AREA, SHAANXI

作　　者：雒昆利[1,2] 

机构地区：[1]中国科学院地理科学与资源研究所 [2]西安科技学院地质系西安710054

出　　处：《古生物学报》2001年第3期371-387,共17页Acta Palaeontologica Sinica

基　　金：煤炭工业部跨世纪学科带头人基金 2 30 0 2 13;陕西省自然科学基金 IS0 3;中国科学院地理科学与资源研究所知识创新工程专项基金SJIOG A0 0 0 1资助

摘　　要：陕西韩城寒武系出露良好 ,化石丰富 ,从下寒武统上部至奥陶系为连续沉积 ,底部平行不整合覆盖于厚约 2 0m的霍山组石英砂岩之上。本区寒武系主要以紫色和黄色泥页岩、泥灰岩、灰岩和白云质灰岩为主 ,张夏组主要以鲕状灰岩为主 ,夹生物碎屑灰岩 ,三叶虫主要有Changqingiachalcon ,Changqingialuiasp .nov .,Manchuriellamacar ,Lianglangshaniahueirensis ,Crepicephalinaconvexus,Eiluraquadrata ,Eilura ( ?)hanchen gensissp .nov .,Anomocarellachinensis,Dorypygepergranosa ,Dorypygerichthofeni,Liopeishanialubrica ,Liopei shaniamarginata和Damesellaparonai等。三山子组以白云质灰岩和灰质白云岩为主 ,在底部的白云质灰岩中产三叶虫Blackwelderiasp .,Damesopsconvexus和Cyclolorenzellaacalle等 ,其中、上部未采到化石。Cambrian strata are well developed and crop out in Hancheng region, Northeast Shaanxi. They consist chiefly of purple and yellow shale, marl, limestone and dolomitic limestone. They disconformably overly the quartz sandstone (Huoshan Formation, thick about 20 m) and are conformably overlain by Ordovician limestone. The trilobites racorded in this paper were collected from 2 Cambrian sections in Hancheng, north east Shaanxi. The Zhangxia Formation, conformably overlain by the Sanshanzi Formation and overlying Xiuzhuang Formation, is composed of thick-bedded limestone and oolitic limestone. The trilobites in Zhangxia Formation are mainly Changqingia chalcon, Changqingia luia sp. nov., Manchuriella macar, Lianglangshania hueirensis, Crepicephalina convexus, Eilura quadrata, Eilura (?) hanchengensis sp.nov., Anomocarella chinensis, Dorypyge pergranosa, Dorypyge richthofeni, Liopeishania lubrica, Liopeishania marginata and Damesella paronai, etc. The Sanshanzi Formation, overlain conformably by Ordovician limestone and overlying the Zhangxia Formation, is composed of thick-bedded dolomitic limestone intercalated with thin-bedded marl and lime-dolomite; we have collected the trilobites——Damesops convexus, Blackwelderia sp. and Cyclolorenzella acalle in the low part of this formation.

关 键 词：寒武系 陕西 张夏组 三山子组 三叶虫动物群 

分 类 号：Q915.819[天文地球—古生物学与地层学]