五大连池火山岩带的地幔富集作用

CORC > 北京大学 > 地球与空间科学学院

	五大连池火山岩带的地幔富集作用; Mantle enrichment of Wudalianchi volcanic rock belt.
	邵济安 ; 张文兰 ; 张聪
刊名	岩石学报
	2008
关键词	超钾质火山岩包体交代作用富集地幔裂谷 Ultrapotassic volcanic rocks Enclosure Melasomotism Enriched mantle Rift
英文摘要	小古里河-科洛-五大连池-二克山新生代火山岩带是一条富钾火山岩带,本文选择科洛荡子山新近纪的白榴碧玄岩和其中的方辉橄榄岩地幔包体和白榴霓霞岩岩浆包体为重点研究对象,通过岩相学和地球化学研究发现大量地幔交代的证据,从而认识到以方辉橄榄岩代表的岩石圈地幔在来自软流圈富含不相容元素的流体交代作用下,形成了富集地幔,白榴霓霞岩包体和富钾的火山岩则来自这类交代型地幔不同阶段部分熔融的岩浆,因此火山岩具有低Nd、低Pb和高Sr的同位素特征.富钾火山岩带的K2O/Na2O等值线图表明长400km,宽50km的幔源富钾的火山岩带是受新生代陆内NNW走向的裂谷控制.; The Xiagulihe-Keluo-Wudalianchi-Erkeshan Cenozoic volcanic rock belt is rich in potassium. Neogene leucite basanite from Dangzishan in Keluo, as well as the saxonite mantle enclosures and leucoaegineite magmatic enclosures contained in it, is particularly studied in this work. Abundant evidences of mantle metasomotism are discovered through faciecological and geochemical researches. It is inferred that the enriched mantle comes from ancient lithosphere mantle represented by saxonite, which has experienced fluid metasomotism with the fluids rich in incompatible elements coming from the asthenosphere. While the leucoaegineite enclosures and potassium-rich volcanic rocks comes from partially melting magmas in various stages of such a replacement mantle, and the. volcanic rocks, therefore, has the lower Nd, lower Pb and high Sr isotopic feature. K(2)O/Na(2)O contours are compiled for the whole concerned area, which reveal that the mantle source potassium-rich volcanic rock belt ranges 400 km long and 50 km wide and is controlled by Cenozoic NNW strike intracontinental rift.; 国家自然科学基金; 中国科学院重点实验室基金; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000262521300003&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); 6; 11; 2485-2494; 24
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/247945]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	邵济安,张文兰,张聪. 五大连池火山岩带的地幔富集作用, Mantle enrichment of Wudalianchi volcanic rock belt.[J]. 岩石学报,2008.
APA	邵济安,张文兰,&张聪.(2008).五大连池火山岩带的地幔富集作用.岩石学报.
MLA	邵济安,et al."五大连池火山岩带的地幔富集作用".岩石学报 (2008).