北羌塘盆地胜利河中-晚侏罗世孢粉组合指示的古植被和古气候特征及其油气意义  

Paleovegetation and Paleoclimate Characteristics Indicated by Spore-pollen Assemblages of the Middle-Late Jurassic in Shenglihe area,North Qiangtang Basin,its Petroleum Significance

作　　者：白培荣 熊兴国 贺永忠 吴滔 易成兴 朱勋 BAI Pei-rong;XIONG Xing-guo;HE Yong-zhong;WU Tao;YI Cheng-xing;ZHU Xun(Guizhou Geological Survey,Guiyang 550018;Guizhou,China,Academician Wordsttion,Guizhou Institute of Geological Survey,Guiyang 550081)

机构地区：[1]贵州省地质调查院,贵州省地质调查院院士工作站,贵州贵阳550081

出　　处：《贵州地质》2020年第2期165-174,共10页Guizhou Geology

基　　金：中国地质调查局项目(青藏高原重点盆地油气资源战略调查与选区,项目编号:XQ2004-06;专题编号:科油[2007]02号);贵州省地质调查院院士工作站共同资助.

摘　　要：在北羌塘盆地胜利河地区原侏罗系中上统采集到丰富的孢粉化石,该孢粉化石组合以Classopollis、Cyathidites、Osmundacidites及Brevilaesuraspora占主要趋势,经研究及区域对比孢子花粉化石组合时代为中-晚侏罗世。该时期孢粉组合指示的古植被特征以喜干热的掌鳞杉科(Chriolepidaceae)为优势类群,还有少数苏铁科、南美杉科、松科、杉科、松柏科、罗汉松科等植物伴生其间,林下生长着类型多样的蕨类植物。因此,本孢粉植物群反映的古气候属于干旱炎热的热带-亚热带。Abundant sporopollen fossils were collected from the Upper Middle Jurassic in the Shenglihe area of the North Qiangtang basin.The main trend of the sporopollen assemblage is classopolis,Cyclonidites,Osmundacitites and Brevilaesuraspora.The age of the sporopollen assemblage is Middle Late Jurassic.The ancient vegetation characteristics indicated by the sporopollen assemblage in this period are dominated by the dry and hot palmatidaceae,and a few Cycadiaceae,South American fir,Pine,Fir,Coniferae,Arhat Pine and other plants are accompanied,under which there are various types of fern plants.Therefore,the paleoclimate reflected by the palynoflora belongs to the hot and arid tropics subtropics.

关 键 词：孢子花粉 中-晚侏罗世 北羌塘盆地 

分 类 号：P534.52[天文地球—古生物学与地层学] P52[天文地球—地质学]