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首页> 外文期刊>Contributions to Mineralogy and Petrology >A modified iterative sandwich method for determination of near-solidus partial melt compositions. I. Theoretical considerations
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A modified iterative sandwich method for determination of near-solidus partial melt compositions. I. Theoretical considerations

机译：用于确定近固相线部分熔体成分的改进的迭代夹心法。一，理论考虑

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摘要

The sandwich technique for determining the composition of partial melts in equilibrium with mantle lithologies may be a particularly powerful method for determining melt compositions at the onset of melting if the method is applied iteratively. However, conventional iterative sandwich experiments, in which the liquid from a preceding experiment is used as the "meat" of the sandwich in the following experiment, may require many iterations before the melts produced can be directly relatable to the melting relations of the target bulk rock composition. A modified iterative sandwich experimental (MISE) technique is proposed that may circumvent many of the problems of more conventional techniques. Consideration of experimental uncertainties, including both random and systematic errors in determination of partial melt compositions as well as the influence of errors in estimates of the solidus temperature of the rock of interest, suggests that the MISE technique may produce robust results even when melt composition errors are significant and that errors in estimation of the solidus location are detectable and therefore avoidable.
机译：如果迭代地应用该方法，则用于确定与地幔岩性平衡的部分熔体成分的夹层技术可能是一种在熔体开始时确定熔体成分的特别有效的方法。但是，常规的迭代三明治实验（其中先前实验中的液体用作后续实验中三明治的“肉”）可能需要多次迭代，才能将产生的熔体直接关联到目标块的熔融关系岩石组成。提出了一种改进的迭代三明治实验（MISE）技术，该技术可以规避更常规技术的许多问题。考虑实验不确定性，包括确定部分熔体成分时的随机误差和系统误差，以及所关注岩石的固相线温度估算误差的影响，都表明即使在熔体成分误差较大的情况下，MISE技术也可能产生可靠的结果这是很重要的，并且可以检测到固相线位置的估计误差，因此可以避免。

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