A consistent partition coefficient set for clinopyroxéne, amphibole and garnet from laser ablation microprobe analysis of garnet pyroxenites from Kakanui, New Zealand
A consistent partition coefficient set for clinopyroxéne, amphibole and garnet from laser ablation microprobe analysis of garnet pyroxenites from Kakanui, New Zealand
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DOI：
10.1127/njma/172/1997/23
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发表时间：
1997-09
影响因子：
0.5
通讯作者：
T. Zack;S. Foley;G. Jenner
中科院分区：
文献类型：
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作者：
T. Zack;S. Foley;G. Jenner
用激光烧蚀微探针（LAM）测定了新西兰Kakanui地区4种石榴辉石岩中单斜辉石、角闪石和石榴子石中24种微量元素的丰度。由于平衡条件可以证明，数据进行评估，用于计算可靠和一致的矿物和熔体之间的分配系数。使用哈特和DUNN（1993）的实验确定的DCPX/L值作为参考组，使用来自Kakanui的测量的DAMP/CPX和DGRT/CPX数据计算r> M> lp/L和DGRT/L。从Kakanui数据计算的整体DAMP/L模式与已发表的实验数据一致。我们建议在镁铁质和超镁铁质系统中使用计算的DAMP/L值进行多元素建模，因为它们代表了D1的广泛数据集，并包括Sc（0.74）和V（3.0）的可靠DAMP/L。本研究的DGRT/L值不同于实验得出的DGRT/L，因为高度不相容元素的值在实验数据集中显著更高。这种差异被解释在一个强大的结构控制的温度效应的分区行为。920 ℃ Kakanui数据集可能比1400 ℃的实验数据集更适用于许多自然结晶条件。
The abundances of 24 trace elements in clinopyroxene, amphibole and garnet from 4 garnet pyroxenites from Kakanui, New Zealand, were obtained by laser ablation microprobe (LAM). Since equilibrium conditions can be proven, the data are evaluated for their use of calculating reliable and consistent partition coefficients between minerals and melt. Using the experimentally determined DCPX/L values of HART & DUNN (1993) as a reference set, r> M> lp/L and DGRT/L were calculated using the measured DAMP/CPX and DGRT/CPX data from Kakanui. The overall DAMP/L pattern calculated from the Kakanui data is consistent with published experimental data. We recommend the calculated DAMP/L values for multi-element modelling in mafic and ultramafic systems since they represent an extensive data set for D1 and include reliable DAMP/L for Sc (0.74) and V (3.0). The DGRT/L values from this study differ from experimentally derived DGRT/L since values for highly incompatible elements are significantly higher in the experimental data sets. This difference is interpreted in terms of a strong structurally-controlled temperature effect on partitioning behaviour. The 920 C Kakanui data set may be more applicable to many natural crystallization conditions than experimental data sets at 1400 C.