PRIMELT3 MEGA.XLSM software for primary magma calculation: Peridotite primary magma MgO contents from the liquidus to the solidus
PRIMELT3 MEGA.XLSM software for primary magma calculation: Peridotite primary magma MgO contents from the liquidus to the solidus
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DOI：
10.1002/2014gc005631
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发表时间：
2015-02-01
影响因子：
3.5
通讯作者：
Asimow, P. D.
中科院分区：
文献类型：
--
作者：
Herzberg, C.;Asimow, P. D.
对PRIMELT原生岩浆成分计算算法进行了改进，并在PRIMELT3 MEGA中实现。xlsm软件。它取代PRIMELT2.xls修正了橄榄石熔体分数和计算镍含量的小错误，识别了残余矿物学，并对地幔位温和橄榄石液相温度的不确定性进行了深入的分析。通过计算橄榄石液相温度随压力和液相与固相间部分熔体MgO含量的函数，使不确定度分析易于处理。利用MgO、T和P沿固相的关系，在T-P空间中计算了无水橄榄岩固相；它与固体上的实验结果比较好。PRIMELT3应用于大范围玄武岩的结果表明，海洋岛屿和大火成岩省的地幔源比海洋扩张中心更热，这与早期地幔柱模型的研究和预期一致。
An upgrade of the PRIMELT algorithm for calculating primary magma composition is given together with its implementation in PRIMELT3 MEGA.xlsm software. It supersedes PRIMELT2.xls in correcting minor mistakes in melt fraction and computed Ni content of olivine, it identifies residuum mineralogy, and it provides a thorough analysis of uncertainties in mantle potential temperature and olivine liquidus temperature. The uncertainty analysis was made tractable by the computation of olivine liquidus temperatures as functions of pressure and partial melt MgO content between the liquidus and solidus. We present a computed anhydrous peridotite solidus in T-P space using relations amongst MgO, T and P along the solidus; it compares well with experiments on the solidus. Results of the application of PRIMELT3 to a wide range of basalts shows that the mantle sources of ocean islands and large igneous provinces were hotter than oceanic spreading centers, consistent with earlier studies and expectations of the mantle plume model.