Bulk chemical composition of lherzolitic shergottite Grove Mountains 99027—Constraints on the mantle of Mars

作     者：Yangtmg LIN~(1*),Liang QI~2,Guiqm WANG~3,and Lin XU~4 1 Key Laboratory of the Earth’s Deep Interior,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China 2 State Key Lab of Ore Deposit Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China 3 Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,China 4 National Astronomic Observatory,Chinese Academy of Sciences,Beijing,China 

会议名称：《中国科学院地质与地球物理研究所2008学术年会》

会议日期：2009年

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

基　　金：supported by the Knowledge Innovation Program(kzcx2-yw-110) One-Hundred -Talent Program of the Chinese Academy of Sciences,and by the Natural Science Foundation of China (grant no.40232026) 

摘      要：We report the concentration of 50 elements,including rare earth elements(REEs) and platinum group elements(PGEs) in bulk samples of the Grove Mountains(GRV) 99027 lherzolitic *** abundances of REEs are distinctly lower than those of Allan Hills(ALH) A77005 and other lherzolitic shergottites,indicating that GRV 99027 is not paired with *** may,nevertheless, sample the same igneous unit as the others(Lin et al.2005b;Wang and Chen 2006).The CI-normalized elemental pattern of GRV 99027 reveals low(0.004-0.008×CI) and unfractionated PGEs (except for Pd of 0.018×CI) without depletion of W or Ga relative to lithophile element trends. Fractionation between siderophile and lithophile elements become less pronounced with increase of volatility,except for high abundances of Ni and *** characteristics are probably representative of the mantle of Mars,which is consistent with previous work that the Martian mantle formed in a deep magma ocean followed by a later accretion of chondritic materials.