The effect of titanium on the partitioning behavior of high-field strength elements between silicates, oxides and lunar basaltic melts with applications to the origin of mare basalts
The effect of titanium on the partitioning behavior of high-field strength elements between silicates, oxides and lunar basaltic melts with applications to the origin of mare basalts
复制标题
钛对高场强元素在硅酸盐、氧化物和月球玄武岩熔体之间分配行为的影响及其在海海玄武岩起源中的应用
DOI:
10.1016/j.chemgeo.2016.07.011
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发表时间:
2016
期刊:
影响因子:
3.9
通讯作者:
Blanchard
中科院分区:
文献类型:
--
作者:
Leitzke;Fonseca;Michely;Sprung;Münker;Heuser;Blanchard
A specific feature of some basaltic lunar rocks is that their TiO2contents can reach concentrations as high as 16 wt.%. The high-field strength elements (HFSE) group, which includes Ti, may provide valuable information of the processes that occurred in the lunar mantle to generate high-Ti mare basalts. To assess the effect of such high TiO2concentrations on the partitioning of Zr, Hf, Nb, Ta, U, Th, Mo and W between major silicate and oxide phases and silicate melts, we present results from experiments at one atmosphere and 1100 °C–1305 °C, under controlled oxygen fugacity. With the exception of Nb, allDHFSEcpx/meltshow a strong negative correlation with the TiO2content of the silicate melt. Olivine/Silicate melt partition coefficients for Zr, Hf, Nb, Ta and Th decrease slightly from 0 to ca. 5 wt.% TiO2,above which they remain constant up to ca. 20 wt.% TiO2in the silicate glass. In addition, redox sensitive elements, i.e. U, Mo, and W show clearly distinctDMsilicates/meltat different fO2, implying that these elements are relatively more compatible at reduced (ca. IW − 1.8) than at oxidized (FMQ and air) environments. Iron-rich and Mg-rich armalcolite show contrasting patterns ofDMcrystal/melt, with the latter exhibiting slightly higher values of partition coefficient for all analyzed elements, except Th, which is equally incompatible in both end-members. Finally, the new dataset ofDHFSEcrystal/meltwas used to perform simple melting models of the lunar mantle cumulates. Results indicate that to reproduce the fractionation of W from the HFSE, as well as U and Th observed in lunar mare basalts, metal saturation and the presence of Fe–Ti oxides in the mantle sources is required.
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影响因子:
3.8
作者:
A. Bence;T. Grove;J. Papike
通讯作者:
J. Papike
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
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通讯作者:
M. Rutherford
影响因子:
3.1
作者:
J. Karner;J. Papike;C. Shearer
通讯作者:
C. Shearer
影响因子:
3.9
作者:
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通讯作者:
M. Kirchenbaur;C. Münker;S. Schuth;D. Garbe‐Schönberg;P. Marchev
影响因子:
5
作者:
B. Mysen;D. Neuville
通讯作者:
B. Mysen;D. Neuville