四川江油渔洞子下三叠统飞仙关组巨鲕灰岩中超微化石的首次发现及古生态意义  

DISCOVERIES OF“DOUBTFUL”NANNOFOSSILS FROM THE GIANT OOLITIC LIMESTONE IN THE LOWER TRIASSIC FEIXIANGUAN FORMATION OF THE YUDONGZI SECTION OF JIANGYOU,SICHUAN,SOUTHWEST CHINA AND THEIR PALAEOECOLOGIC SIGNIFICANCES

作　　者：周志澄[1] 许波[1] 罗辉[1] WILLEMS H 王学恒[1] 蔡华伟[1] 陈迪舒[1] 刘实佳 陈金华[1] ZHOU Zhicheng XU Bo LUO Hui WILLEMS H WANG Xueheng CAI Huawei CHEN Dishu LIU Shijia CHEN Jinhua(Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, PR China Fachbereich Geowissenscha ften , Universitat , Bremen, 28359 Bremen, Germany)

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]Fachbereich Geowissenschaften,Universitat

出　　处：《微体古生物学报》2017年第2期151-159,共9页Acta Micropalaeontologica Sinica

基　　金：中国科学院战略性先导科技专项(B类)(Grant No.XDB03010102);中国科学院"外国专家研究员"计划项目(项目编号:2009Z2-7);国家自然科学基金青年基金(41402016);国家自然科学基金(41072008);德国研究委员会课题(Wi725/26)联合资助~~

摘　　要：四川江油渔洞子剖面下三叠统飞仙关组下部巨鲕灰岩中首次发现丰富的超微化石,包括疑似超微细菌、疑似颗粒状浮游蓝细菌。它们的大量发现,进一步证明了巨鲕灰岩的成因与细菌的活动有关。同时,文章阐述了与这些超微化石共生在一起的非生物成因的方解石的成因机制。以疑似底栖蓝细菌和疑似颗粒状浮游蓝细菌为主的微体生物建立了一个简单的营养网,共同构筑了这一地区早三叠世早期海洋的古生态系统,它们的爆发性增长,与这一地区曾经发生过的海洋环境恶化及动物灭绝事件有关。The abundant nannofossils including ＂doubtful＂ nannobacteria and ＂doubtful＂ coccoid plankton cyanobacte- ria are first discovered in the giant oolitic limestone of the lower Feixianguan Formation at the Yudongzi section, Jiangyou, Sichuan, SW China. The discovery indicates that the formation of the giant oolitic limestone was possibly related to the activities of ＂doubtful＂ coccoid plankton cyanobacteria and benthic cyanobacteria. This paper also suggess the mechanism of non-organic calcites formation. As the main members in the marine palaeoecological system in the Early Triassic of this region, the ＂doubtful＂ benthic cyanobacteria and plankton eoccoid cyanobacteria built a simple trophic web. Their expansion was due to the deterioration of marine environments, which also caused the extinction of benthic fauna occurred in this period.

关 键 词：超微化石 巨鲕灰岩 疑似超微细菌 疑似颗粒状浮游蓝细菌 古生态 早三叠世 飞仙关组 渔洞子 江油 四川 

分 类 号：Q913[天文地球—古生物学与地层学]