新疆阿尔泰东部新生代玄武岩的地球化学特征与地质意义

doi:10.3969/j.issn.1000-0569.2007.07.018

CORC > 北京大学 > 地球与空间科学学院

	新疆阿尔泰东部新生代玄武岩的地球化学特征与地质意义; Geochemical characteristics and geologic implications of Cenozoic basalts, east Altai, Xinjiang
	张元元 ; 郭召杰 ; 刘畅 ; 许文骞
刊名	岩石学报
	2007
关键词	阿尔泰新生代玄武岩地球化学构造背景富集地幔 Altai Cenozoic basalts geochemistry tectonic setting enriched mantle
DOI	10.3969/j.issn.1000-0569.2007.07.018
英文摘要	新疆阿尔泰东部哈拉乔拉出露有新生代玄武岩,K-Ar 法测得玄武岩的年龄在10～20Ma,地球化学分析结果表明哈拉乔拉玄武岩具有高 TiO_2含量、高钾富碱的特点,属于典型的橄榄玄粗岩系列;强烈富集不相容元素和轻稀土元素,显示出源区富集的特点。(~(87)Sr/~(86)Sr)_i 为0.704432～0.704538,(~(143)Nd/~(144)Nd)_i 为0.512641～0.512779,ε_(Nd)(t)为0.29～1.03,其 Sr-Nd 同位素特征和地球化学特征都与洋岛玄武岩(OIB)相似。La/Nb(0.765～0.823)、Nb/U(35.02～52.01)等不相容元素的比...; The K-Ar dating indicates that Cenozoic Basalts in Halaqiaola area,eastern Altai in north Xinjiang, were emplaced at 10 similar to 20Ma. And the Basalts are belonging to shoshonite, which have high concentration of TiO2, high K and alkali, and characterized by enrichment in light rare earth elements and compatible elements, indicating an enriched mantle source. Their geochemical characters and Sr-Nd isotopic composition are similar to those of oceanic island basalts (OIB), which has the isotopic results of ((87) Sr/(86) Sr)(i) = 0.704432 similar to 0.704538, ((143) Nd/(144) Nd); =0.512641 similar to 0.512779, epsilon(Nd) (t) =0.29 similar to 1.03. The ratios of La/Nb (0.765 similar to 0.823) and Nb/U (35.02 similar to 52.01) shows that some recycled crust material might he interfused into the enriched source. Analyzing integrally with the Cenozoic basalts in the adjacent areas such as Tuoyun basin, we find that the Cenozoic volcanic rocks in central Asia are scatteredly distributed and developed along the major strike slip faults, which cannot be the results of typical plumes. So this article, combining with the crust evolution in Central Asia, points out that the Cenozoic basalts similar to OIB were originated from the modified enriched mantle which were derived from subducted oceanic crusts during Late Paleozoic.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000249590500018&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; 07; 1730-1738; 23
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/49187]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	张元元,郭召杰,刘畅,等. 新疆阿尔泰东部新生代玄武岩的地球化学特征与地质意义, Geochemical characteristics and geologic implications of Cenozoic basalts, east Altai, Xinjiang[J]. 岩石学报,2007.
APA	张元元,郭召杰,刘畅,&许文骞.(2007).新疆阿尔泰东部新生代玄武岩的地球化学特征与地质意义.岩石学报.
MLA	张元元,et al."新疆阿尔泰东部新生代玄武岩的地球化学特征与地质意义".岩石学报 (2007).