新疆柯坪地区志留系依木干他乌组的遗迹化石

发布时间：2018-03-23 09:22

本文选题：遗迹化石　切入点：依木干他乌组　出处：《地质通报》2017年Z1期 　论文类型：期刊论文

【摘要】：通过对塔里木盆地柯坪露头志留系依木干他乌组中遗迹化石的研究,鉴别出6属7种。化石分子有Chondrites isp.,Gordia.isp.,Helminthopsis aff.abeli,Ophiomorpha nodosa,Planolites beverleyensis,Planolites montanus,Thalassinoides isp.。这些遗迹化石具有较高的分异度和较低的丰度。按古生态或造迹生物的行为习性分类,可分为3种生态类型:(1)居住迹(Domichnia),Ophiomorpha nodosa,Thalassinoides isp.;(2)进食迹(Fodinichnia),Planolites beverleyensis,Planolites montanus,Chondrites isp.;(3)觅食迹(Repichnia),Gordia isp.,Helminthopsis aff.abeli。根据遗迹化石的古生态特征、沉积序列上的分布特点及围岩和沉积构造特征,依木干他乌组的遗迹化石可归为Planolites-Chondrites遗迹组合,属于Cruziana遗迹相,形成于泥坪沉积环境。
[Abstract]:The trace fossils of the Yimugan Tawu formation in Keping outcrop, Tarim Basin, were studied. 7 species belonging to 6 genera have been identified. The fossils are Chondrites isp.Gordia.isp.Helminthopsis aff.abeliomorpha Nodosa Planolites montanusus Thalassinoides isp.These trace fossils have higher differentiation and lower abundance. It can be divided into three ecological types: 1) Domichniaanus (Ophiomorpha nodosa) Thalassinoides isp.f2) Planolites montanusus planolites montanusi Chondrites isp.3). According to the paleoecological characteristics of trace fossils, the distribution characteristics of the sedimentary sequence and the characteristics of surrounding rock and sedimentary structure. The trace fossils of the Yimugantawu formation can be classified as Planolites-Chondrites relic assemblage, belonging to the Cruziana trace facies and formed in the mud flat sedimentary environment.
【作者单位】：中国地质调查局油气资源调查中心;
【基金】：中国地质调查局项目《塔里木盆地及周缘油气基础地质调查》(编号:12120115001801和《塔里木盆地油气资源战略选区调查》(编号:1211302108022)
【分类号】：Q911.28

【相似文献】