Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Earth Science(Journal of China University of Geosciences)》 2009-01
Add to Favorite Get Latest Update

Discussion on Fractionation Mechanism of Lithium Isotopes

TANG Yan-jie,ZHANG Hong-fu,Ying Ji-feng State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing100029,China  
As a burgeoning tracer of stable isotopes,lithium geochemistry has attracted increasing attention from the international geological community recently.Its application field covers the interactions between fluids and minerals from the surface to the mantle.During weathering,the lighter isotope 6Li is preferentially retained in the solid phase while 7Li goes into solution.Thus river waters have heavy Li isotopic compositions compared to the original bedrock.The heavy Li isotopic compositions of river water feed the oceans.Low-temperature alteration of oceanic crust then makes seawater heavier than river water.In a subduction zone,heavy Li of fluids escaping the slab at low temperature likely enrich the forearc mantle wedge and hydrate the adjacent mantle and make them isotopically heavier than before.Meanwhile,an isotopically light component of slab dehydrated is subducted deeply and may form a locally light-Li mantle reservoir.There are three main factors that can result Li isotopic fractionation in mantle peridotites.They are temperature,diffusion-driven fractionation and mixing with exotic melts.At high temperatures of magmatic processes,Li isotopes do not show per mil-level mass fractionation,and simple diffusive process can not account for the Li isotopic fractionation between the minerals in peridotitic xenoliths from the Hannuoba area in the North China Craton,thus the reaction between peridotites and melts with light Li isotopic compositions maybe a reasonable explanation.It should point out that diffusion of Li isotopes during peridotite-melt reaction makes some contributions to the isotopic fractionation between the mantle minerals.
【Fund】: 中国科学院知识创新工程重要方向项目(No.KZCX-YW-103);; 国家自然科学基金项目(Nos.40534022 40773026)
【CateGory Index】: P597
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
Chinese Journal Full-text Database 1 Hits
1 Zhang Hongfu, Tang Yanjie, Zhao Xinmiao, Yang YuehengState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Significance and prospective of non-traditional isotopic systems in mantle geochemistry[J];Earth Science Frontiers;2007-02
Chinese Journal Full-text Database 1 Hits
1 ZHOU Xin-hua(Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China);Major Transformation of Subcontinental Lithosphere beneath North China in Cenozoic-Mesozoic:Revisited[J];Geological Journal of China Universities;2009-01
【Secondary Citations】
Chinese Journal Full-text Database 7 Hits
1 TAO Shi-zhen, LIU De-liang, ZHU Zhi-jing, YANG Xiao-yong (Research Institute of Petroleum Exploration and Development of China ,Beijing 100083, China; 2. University of Science and Technology of China , Hefei 230026, China; 3. Oilextraction factory of Gud;ISOTOPE GEOCHEMISTRY OF MANTLE-DERIVED GAS IN EASTERN CHINA[J];Geotectonica Et Metallogenia;2001-04
2 ZHANG Hong-fuState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Peridotite-melt interaction:an important mechanism for the compositional transformation of lithospheric mantle[J];Earth Science Frontiers;2006-02
3 LI Yan-he, LI Jin-cheng, SONG He-bin, GUO Li-he (Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China);Helium Isotope Studies of the Mantle Xenoliths and Megacrysts from the Cenozoic Basalts in Hannuoba, Hebei Province, China[J];Bulletin of Mineralogy Petrology and Geochemistry;2001-04
4 JIANG Shao yong,YANG Jing hong,ZHAO Kui dong, YU Ji min (State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China);RE-OS ISOTOPE TRACER AND DATING METHODS IN ORE DEPOSITS RESEARCH[J];Journal of Naijing University (Natural Sciences);2000-06
5 Zhou Taixi, Chen Jiangfeng, Xie Zhi, Zhang Xun, Yang Xuechang and Chen Fuming.;Isotopic geochemistry of granitic rocks from Tuomuer Peak region, Tianshan, China[J];Acta Petrologica Sinica;2000-02
6 YU HuiMin, XIA QunKe, Dallai L and Chazot G CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China ISTI-CNR, Rome, Italy Department of Geology, University of Blaise Pascal, France;Oxygen isotope and trace element compositions of peridotite xenoliths from Nushan volcano, SE China and implications for mantle metasomatism.[J];Acta Petrologica Sinica;2005-03
7 ZHANG HongFu~1 ZHOU XinHua~1 FAN WeiMing~1 SUN Min~2 GUO Feng~3 YING JiFeng~1 TANG YanJie~1 ZHANG Jin~1 NIU LiFeng~11.State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China2.Department of Earth Sciences,The University of Hong Kong,Hong Kong,China3.Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;Nature,composition,enrichment processes and its mechanism of the Mesozoic lithospheric mantle beneath the southeastern North China Craton.[J];Acta Petrologica Sinica;2005-04
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved