新疆阿克苏地区寒武纪幸运期早期小壳化石  

Early Fortunian small shelly fossils from the Aksu area of Xinjiang,China

作　　者：杨犇[1] 刘鹏举[1] 尚晓冬[1] 蔡习尧[2] 周元 YANG Ben;LIU Pengju;SHANG Xiaodong;CAI Xiyao;ZHOU Yuan(MNR Key Laboratory of Stratigraphy and Palaeontology,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;SINOPEC Petroleum Exploration and Production Research Institute,Beijing 100083,China;Shaanxi China-Mining-Union Group Limited,Xi'an,Shaanxi 710061,China)

机构地区：[1]中国地质科学院地质研究所,自然资源部地层与古生物重点实验室,北京100037 [2]中国石化石油勘探开发研究院,北京100083 [3]陕西中矿联盟矿业有限公司,陕西西安710061

出　　处：《地质学报》2023年第12期4044-4051,共8页Acta Geologica Sinica

基　　金：中国地质调查局项目(编号DD20230221);国家自然科学基金项目(编号U2244202)联合资助的成果。

摘　　要：本文报道新疆阿克苏地区寒武纪幸运期最早期的小壳化石组合。化石产自玉尔吐斯组底部,包括:Protohertzina anabarica Missarzhevsky,1973、Protohertzina unguliformis Missarzhevsky,1973、Anabarites trisulcatus Voronova and Missarzhevsky,1969、Anabarites ternarius Missarzhevsky in Rozanov et al.,1969、Cambrotubulus decurvatus Missarzhevsky in Rozanov et al.,1969、Olivooides sp.、Kaiyangites novilis Qian and Yin,1984以及海绵骨针化石。据此可以在新疆阿克苏地区玉尔吐斯组下部建立Anabarites trisulcatus-Protohertzina unguliformis组合带。该组合带下界以Anabarites trisulcatus、Protohertzina unguliformis、Protohertzina anabarica、Kaiyangites novilis的首次出现为标志,上界以它们的最后出现为标志。通过上述小壳化石组合可以进一步确认阿克苏地区玉尔吐斯组下部为寒武纪幸运期最早期沉积。Here we report early Cambrian small shelly fossils from the basal Yurtus Formation of various sections(Linkuanggou,Shiairike,Aksu,Penglaiba,Jinlin and Yurtus sections)of Aksu area,Xinjiang.The fossils include:Protohertzina anbarica,Protohertzina unguliformis,Anabarites trisulcatus,Anabarites ternarius,Cambrotubulus decurvatus,Olivooides sp.,Kaiyangites novilis and sponge spicules.A new small shelly fossil zone is proposed herein based on the discovery,i.e.,the Anabarites trisulcatus-Protohertzina unguliformis assemblage zone.Its lower boundary is defined by the first appearance datum of Anabarite trisulcatus,Protohertzina unguliformis,Protohertzina anbarica and Kaiyangites novilis,and the upper boundary defined by their last appearance datum.According to the correlation,the lower Yurtus Formation is considered a deposition of the early Fortunian of Cambrian.

关 键 词：新疆阿克苏地区 玉尔吐斯组 寒武纪 幸运期 小壳化石 

分 类 号：P534.41[天文地球—古生物学与地层学] Q911.2[天文地球—地质学]