Petrographic key parameters, modal proportions, amount of alteration and principal rock names for 39 gabbro samples form the Oman Ophiolite (Wadi Gideah Transect)@en

We have selected 39 gabbro samples from the Wadi Gideah Transect sample suite, representing a full coherent crustal profile from the Moho transition zone (MTZ) to the dike/gabbro transition with an average sample spacing of about 120 m along the crustal depth. All samples were taken at outcrops of fresh gabbro along the Wadi. The height above Moho (h.a.M.) was calculated with respect to the MTZ reference latitude of 22.9152N DD, assuming a generalized average dip of 28° for the layering of the lower gabbros in the Wadi Gideah area. The freshest and primary region of each hand specimen was cut into a block with a water-cooled diamond-blade saw, avoiding areas influenced by secondary weathering and hydrothermal overprint, and subsequently processed to a polished thin-section. We studied the thin-sections using a polarized light microscope to identify petrographic key parameters, which are presented here.我们从瓦迪吉迪亚断面（Wadi Gideah Transect）样品组合中选取了39件辉长岩（gabbro）样品，这些样品完整覆盖了从莫霍过渡带（Moho Transition Zone, MTZ）到岩墙（dike）-辉长岩过渡带的连贯地壳剖面，沿地壳深度方向的平均采样间距约为120米。所有样品均采自瓦迪沿线新鲜辉长岩的露头。莫霍面以上高度（height above Moho, h.a.M.）以莫霍过渡带的参考纬度22.9152°N（十进制度数，DD）为基准计算得出，假设瓦迪吉迪亚地区下部辉长岩层理的平均倾角为28°。我们采用水冷金刚石锯将每件手标本中最新鲜、最原生的区域切割成块，避开受次生风化与热液叠加改造影响的区域，随后将其制备为抛光薄片。我们通过偏光显微镜（polarized light microscope）对薄片开展观测，以识别岩石学（petrographic）关键参数，相关参数已在本文中呈现。