干旱区生态环境知识资源中心(Arid): 鄂尔多斯北部侏罗纪延安组、直罗组孢粉化石及其古气候意义

Arid

	鄂尔多斯北部侏罗纪延安组、直罗组孢粉化石及其古气候意义
其他题名	Jurassic sporopollen of Yan’an Formation and Zhiluo Formation in the northeastern Ordos Basin,Inner Mongolia,and its paleoclimatic significance
	孙立新 1; 张云 1; 张天福 1; 程银行 1; 李艳峰 1; 马海林 2; 杨才 2; 郭佳成 2; 鲁超 3; 周晓光 3
来源期刊	地学前缘
ISSN	1005-2321
出版年	2017
卷号	24 期号:1 页码:32-51
中文摘要	神山沟剖面位于鄂尔多斯盆地东北缘内蒙古东胜地区,侏罗纪延安组、直罗组富含孢粉化石。延安组为煤系沉积地层,岩性以灰白色砂岩、灰色粉砂岩夹泥岩为主,局部发育砾岩,可见5、6套煤层;直罗组为重要的含铀岩系,岩性以灰色-黄绿色砂岩、灰色粉砂岩夹紫红色泥岩、泥质粉沙岩为主。文中通过对神山沟剖面延安组和直罗组孢粉化石的分析,在延安组中识别出Cyathidites-Dictyophyllidites-Cycadopites(CDC)和Cyathidites-Osmundacidites-Lycopodiumsporites-Concentrisporites-Disacciatrileti(COLCD)2个孢粉组合带,通过对孢粉化石属种的分析,得出本剖面延安组孢粉组合的时代为早中侏罗世早期;直罗组孢粉组合为Cyathidites- Osmundacidites-Cycadopites-Disacciatrileti(COCD)组合带,时代中侏罗世中期。结合地质、元素地球化学、古植物及其孢粉化石的定量分析表明,从延安组向直罗组其总体上反映了从温暖潮湿的亚热带向半干旱-干旱炎热的气候转变,反映燕山运动早期中侏罗世一次重要的古气候变化事件,古气候对煤、砂岩型铀的成矿具有特殊的地质意义。
英文摘要	Shenshangou section is located in the northeastern Ordos Basin,Dongsheng area of Inner Mongolia. Jurassic Yan’an Formation and Zhiluo Formation contain abundant sporopollen fossils.The Yan’an Formation is a coal-bearing strata,and is composed of grayish white sandstone,grey siltstone with mudstone,few conglomerate layer,and 5-6sets of coal seam.The Zhiluo Formation is an important uranium bearing rock series.It consists of gray greenish sandstone,grey siltstone with purple red mudstone and mud silty rocks.On the basis of the profile of ShenshangouYan’an Formation and Zhiluo Formation sporopollen analysis,we identifiedtwo assemblage zone of Cyathidites-Dictyophyllidites-Cycadopites(CDC)and Cyathidites-Osmundacidites- Lycopodiumsporites-Concentrisporites-Disacciatrileti (COLCD)in the Yan’an Formation,which indicate that the age of Yan’an Formation was the Early to Middle Jurassic.Sporopollen assemblage zone of the Zhiluo Formation is composed of Cyathidites-Osmundacidites-Cycadopites-Disacciatrileti (COCD)with the Middle Jurassic era.Comprehensive geology,element geochemistry,and the quantitative analysis of fossil plants and sporo-pollen fossils showed that from the Yan’an Formation to the Zhiluo Formation deposition period the climate changed from the subtropical warm and humid to arid and semi-arid hot,reflecting an important ancient climate change event in the early Yan’an movement during the Early Jurassic,which may have special geological significance for the coal and sandstone type of uranium mineralization.
中文关键词	孢粉组合 ; 早中侏罗世 ; 直罗组 ; 延安组 ; 古气候 ; 神山沟剖面 ; 鄂尔多斯盆地
英文关键词	sporopollen assemblages Early-Middle Jurassic Zhiluo Formation Yan’an Formation paleoclimates Shenshangou section northeastern Ordos Basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:5898187
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235810
作者单位	1.中国地质调查局天津地质调查中心, 天津 300170, 中国; 2.内蒙古地质调查院, 呼和浩特, 内蒙古 010010, 中国; 3.核工业二○八大队, 包头, 内蒙古 014010, 中国
推荐引用方式 GB/T 7714	孙立新,张云,张天福,等. 鄂尔多斯北部侏罗纪延安组、直罗组孢粉化石及其古气候意义[J],2017,24(1):32-51.
APA	孙立新.,张云.,张天福.,程银行.,李艳峰.,...&周晓光.(2017).鄂尔多斯北部侏罗纪延安组、直罗组孢粉化石及其古气候意义.地学前缘,24(1),32-51.
MLA	孙立新,et al."鄂尔多斯北部侏罗纪延安组、直罗组孢粉化石及其古气候意义".地学前缘 24.1(2017):32-51.