塔里木溢流玄武岩的喷发特征

CORC > 北京大学 > 地球与空间科学学院

	塔里木溢流玄武岩的喷发特征; The eruption characteristics of the Tarim flood basalt
	上官时迈 ; 田伟 ; 徐义刚 ; 关平 ; 潘路
刊名	岩石学报
	2012
关键词	溢流玄武岩大火成岩省火山地层学火山碎屑岩塔里木 Flood Basalt Large Igneous Province (LIP) Volcanic stratigraphy Pyroclastic rock Tarim
英文摘要	通过对柯坪地区二叠系野外火山岩露头剖面和英买力、哈拉哈塘井区二叠系火山岩钻井剖面的对比,将塔里木早二叠世溢流玄武岩划分为三个旋回,从老到新依次是:库普库兹满溢流玄武岩旋回(KP),长英质火山碎屑岩旋回(FP)和开派兹雷克溢流玄武岩旋回(KZ)。KP旋回以巨厚溢流玄武岩夹凝灰岩为特征,在柯坪露头区和英买力井区均可划分出三层巨厚玄武质熔岩流,至哈拉哈塘井区减少为一层玄武岩流,但长英质火山碎屑岩和熔岩厚度增加。FP旋回在柯坪露头区自下而上包括空落相凝灰岩,熔结凝灰岩,再沉积火山碎屑岩和正常碎屑岩夹火山灰层,该层可与英买力及哈拉哈塘井区的凝灰岩层对比,表明在塔北存在一期面积广泛的长英质火山喷发。KZ旋...; Integration of field investigation, regional stratigraphic comparison, remote sensing and image interpretation allow us to divide the Tarim Permian flood basalt province into three eruptive cycles listed by decreasing age; Kupukuziman flood basalt (KP), Felsic pyroclastic rocks (FP), Kaipaizileike flood basalt (KZ). KP features flood basalt and tuff; in the outcrop in Keping and Yingmaili areas, it can be differentiated into two units containing three thick layers of basaltic lava flows. These three layers decrease to one layer of basaltic lava flow in the Halahatang area; however, felsic pyroclastic rocks and lava layer thicknesses increase in the Halahatang area. FP in the outcrop in Keping area consists of ash fall tuff, ignimbrite, resedimented pyroclastic rocks, and the tuff layer interbedded with the normal elastic rocks section from top to bottom. This section is comparable to the tuff layer in the Yingmaili and Halahatang area, thus reveals one layer of lava flow covering an extensive area clue to a unit of the eruption of the FP. KZ mainly features flood basalt in its Kaipaizileike section, identifications of 4 eruptive units, 8 layers of flood basalt, and I layer of andesitic basalt were made. Traces of elastic rocks were found between eruption units, but no FP interlayers were found. This characteristic is different from Yingmaili and Halahatang volcanic se.quences, but similar to the flood basalt in Tazhong area. The differentiation between these three volcanic cycles reveals that Tarim flood basalt underwent a " flood basalt-felsic pyroclastic rocks-flood basalt " transformation, and is similar to Afro-Arabian large igneous province; thus, a comparative study between these two regions is merited.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000303970100022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 7; 04; 1261-1272; 28
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/229769]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	上官时迈,田伟,徐义刚,等. 塔里木溢流玄武岩的喷发特征, The eruption characteristics of the Tarim flood basalt[J]. 岩石学报,2012.
APA	上官时迈,田伟,徐义刚,关平,&潘路.(2012).塔里木溢流玄武岩的喷发特征.岩石学报.
MLA	上官时迈,et al."塔里木溢流玄武岩的喷发特征".岩石学报 (2012).