Geochemistry of the nb-enriched basalt and its significances in zaheba ophiolite melange.
文献类型：期刊论文
| 作者 | Niu HeCai1; Shan Qiang1; Yu XueYuan1; Zhang Bing3; Luo Yong1,2; Yang WuBin1,2 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2009-04-01 |
| 卷号 | 25期号:4页码:916-924 |
| 关键词 | Nb-enriched basalt Zaheba ophiolite melange Oceanic crust subduction Oceanic sediment |
| ISSN号 | 1000-0569 |
| 通讯作者 | Niu hecai(niuhc@gig.ac.cn) |
| 英文摘要 | Nb-enriched basaltic rocks are identified within the zaheba ophiolite melange in the eastern junggar, northern xinjiang. they show high nb contents of 7.22 x 10(-6) to 21.9 1 x 10(-6), sio(2) contents of 46.71% to 57.65% and tio(2) contents of 1.00% to 1.76%, similar to nb-enriched basalts from archaean greenstone belt. the ree patterns are of lree enrichment with weak eu anomalies, suggesting obvious fractionation. moreover, they are characterized by obviously negative nb anomalies and negative ti anomalies, suggesting that the nb-enriched basalts were probably derived from partial melting of mantle peridotite that interacted with slab melt under high geothermal gradient in the intra-ocean arc setting of the palco-asian ocean. moreover, nb-enriched basalts occurred in the zaheba ophilite as a fore-arc accretionary prism. the association of the nb-enriched basalts with ultra-high pressure metamorphic rocks found previously by the authors implies that more than two times of the paleo-asian oceanic crust subduction with different characteristics were recorded in the ophiolite. therefore, multiple partial melting of the subducting oceanic crust and ocean sediments, and the succedent interactions between the slab melt and peridotite in the mantle wedge was probably responsible for the crust growth and the formation of central asian orogenic belts. |
| WOS关键词 | SUPERIOR PROVINCE ; CONTINENTAL-MARGIN ; GREENSTONE BELTS ; ARABIAN SHIELD ; CRUSTAL GROWTH ; CENTRAL-ASIA ; NW CHINA ; ARC ; EVOLUTION ; XINJIANG |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000265945600015 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2397732 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Niu HeCai |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Univ, Coll Earth Sci, Beijing 100049, Peoples R China 3.Xinjiang Bur Geol & Mineral Resource Explorat, Geol Survey Team 7, Wusu 833000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Niu HeCai,Shan Qiang,Yu XueYuan,et al. Geochemistry of the nb-enriched basalt and its significances in zaheba ophiolite melange.[J]. Acta petrologica sinica,2009,25(4):916-924. |
| APA | Niu HeCai,Shan Qiang,Yu XueYuan,Zhang Bing,Luo Yong,&Yang WuBin.(2009).Geochemistry of the nb-enriched basalt and its significances in zaheba ophiolite melange..Acta petrologica sinica,25(4),916-924. |
| MLA | Niu HeCai,et al."Geochemistry of the nb-enriched basalt and its significances in zaheba ophiolite melange.".Acta petrologica sinica 25.4(2009):916-924. |
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来源：中国科学院大学
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