Mineral chemical compositions within the uppermost lithospheric mantle exposed and sampled in the Wadi Tayin Massif from the Oman ophiolite.

The dataset includes in-situ major element chemical analyses carried out at the Electron Probe Micro-Analyzer (EPMA) at the Dipartimento di Scienze della Terra “Ardito Desio”, University of Milano, on olivine, orthopyroxene, clinopyroxene, and spinel of spinel harzburgite samples. Samples were collected in the uppermost lithospheric mantle portion exposed along the Wadi Zeeb and Wadi Nassif rivers in the Wadi Taiyn massif (south of the Oman ophiolite). The purpose of the dataset is to document the chemical composition and possible chemical changes of the main mineral phases componing the refractory mantle harzburgites sampled at various depths in the mantle and involved within the spinel stability field by a reactive porous melt flow event with different degrees of melt-rock interaction.本数据集包含在米兰大学"阿尔迪托·德西奥"地球科学系（Dipartimento di Scienze della Terra "Ardito Desio"）的电子探针显微分析仪（Electron Probe Micro-Analyzer, EPMA）上开展的原位主量元素化学分析，分析对象为尖晶石方辉橄榄岩（spinel harzburgite）样品中的橄榄石（olivine）、斜方辉石（orthopyroxene）、单斜辉石（clinopyroxene）与尖晶石（spinel）。 样品采自阿曼蛇绿岩（Oman ophiolite）以南的塔伊恩谷（Wadi Taiyn）地块内，沿Zeeb谷与Nassif河谷出露的最上部岩石圈地幔段。 本数据集旨在记录经伴随不同程度熔体-岩石相互作用的反应性多孔熔体流动事件改造、处于尖晶石稳定域内且采自地幔不同深度的难熔地幔方辉橄榄岩的主要矿物相化学成分及其潜在化学变化。