羌塘盆地冬曲地区上三叠统巴贡组古网迹的发现及古环境意义  

The discovery of Paleodictyon in Upper Triassic Bagong Formation in Dongqu area of Qiangtang basin and its palaeoenvironment significance

作　　者：占王忠[1,2] 彭清华 陈文彬[1,2] ZHAN Wangzhong;PENG Qinghua;CHEN Wenbin(Chengdu Center of China Geological Survey,Chengdu 610081,Sichuan,China;Key Laboratory for Sedimentary Basin and Oil and Gas Resources,Ministry of Natural Resources,Chengdu 610081,Sichuan,China)

机构地区：[1]中国地质调查局成都地质调查中心,四川成都610081 [2]自然资源部沉积盆地与油气资源重点实验室,四川成都610081

出　　处：《地质通报》2019年第2期208-212,共5页Geological Bulletin of China

基　　金：国家自然科学基金项目<羌塘盆地海相油页岩:沉积古环境;古气候及源区>(批准号:41172098);中国地质调查局项目<羌塘盆地金星湖-隆鄂尼油气资源战略调查>(编号:DD20160159);中石化勘探分公司项目<羌塘盆地玛曲地区石油地质条件研究及选区评价>(编号:1600428644)

摘　　要：在羌塘盆地东部冬曲地区上三叠统巴贡组地层中发现有Paleodictyon古网迹遗迹化石,通过观测研究确认属于巢网迹遗迹亚属P.(Glenodictyon) Vander Mark,与国内外相关资料对比后认为,羌塘盆地东部冬曲地区在晚三叠世属于深海、贫氧、高盐度的复理石沉积环境,对羌塘盆地古环境分析及岩相古地理格局具有重要的指导意义。Paleodictyon trace fossils were found in Upper Triassic Bagong Formation in Dongqu area of Qiangtang basin.The authors confirmed that they belong to P.(Glenodictyon)Vander Mark.A comparison with relevant information available shows that the palaeoenvironment of Dongqu area in east Qiangtang basin belonged to deep-sea,low oxygen and high salinity flysch sedimentary environment in Late Triassic.The results obtained by the authors are of significance for environmental analysis and lithofacies paleogeographic pattern study.

关 键 词：羌塘盆地 上三叠统 古网迹 古环境 

分 类 号：P534.51[天文地球—古生物学与地层学] Q915.2[天文地球—地质学]