沸石相

沸石相（英语：zeolite facies）是一种在低度变质作用下的矿物组合。通常被认为是沉积物的成岩过程与葡萄石-绿纤石相之间的过渡相。后者这是中洋脊扩张中心周围洋壳海底变质的标志。由于不需要区域造山变质作用，沸石相和葡萄石-绿纤石相被认为是埋藏变质类型^[1]。最常出现沸石相原岩通常为泥质沉积物，含铝、二氧化矽、钾和钠量高，但通常铁、镁和钙含量较低。沸石相变质作用通常导致低温粘土矿物产生高温多晶型物，如高岭石（英语：kaolinite）和蛭石（英语：vermiculite）^[2]。

沸石相矿物组合包括高岭石和蒙脱石以及月桂石、怀拉克石、葡萄石、方解石和绿泥石。若原岩富含钾，矿物组合为多硅白云母（英语：Phengite）adularia冰长石（英语：adularia）,沸石、钠长石和石英。沸石相成岩温度约为 50 - 150 °C，埋深通常为 1 - 5 公里。一般深成岩和火山岩受沸石相变质作用的影响不大，但沸石矿物会在玄武岩孔洞中出现^[3]。

参考文献

^ Minoru Utada （2001）Zeolites in Burial Diagenesis and Low-grade Metamorphic rocks。Reviews in Mineralogy and Geochemistry 45 (1): 277–304. https://doi.org/10.2138/rmg.2001.45.9
^ Azuma Iijima (2009) Geology of natural zeolites and zeolitic rocks.journal of Pure and Applied Chemistry. Volume 52 Issue 9 https://doi.org/10.1351/pac198052092115
^ R.L.Hay (1986) Geologic Occurrence of Zeolites and Some Associated Minerals，Studies in Surface Science and Catalysis Volume 28, Pages 35-40 https://doi.org/10.1016/S0167-2991(09)60853-3

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[”Utada”-1] Minoru Utada （2001）Zeolites in Burial Diagenesis and Low-grade Metamorphic rocks。Reviews in Mineralogy and Geochemistry 45 (1): 277–304. https://doi.org/10.2138/rmg.2001.45.9

[”Azuma”-2] Azuma Iijima (2009) Geology of natural zeolites and zeolitic rocks.journal of Pure and Applied Chemistry. Volume 52 Issue 9 https://doi.org/10.1351/pac198052092115

[”Hay”-3] R.L.Hay (1986) Geologic Occurrence of Zeolites and Some Associated Minerals，Studies in Surface Science and Catalysis Volume 28, Pages 35-40 https://doi.org/10.1016/S0167-2991(09)60853-3

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