Powder diffraction data for Arabian sands and sandstones

This data set contains powder diffraction data for Arabian sands (surface Quaternary sands from Nafud, Dahna corridor, and the western part of AlRub'AlKhali deserts), and Arabian sandstones (outcrop Paleozoic and Mesozoic sandstones from northern and central Arabia). Forty sandstone samples were collected from Arabian platform Paleozoic and Mesozoic outcrop successions. These were ground to a powder using a steel vibratory disc mill for 15 seconds. Paleozoic samples were collected from Madinah, AlJawf, and Qasim Provinces, and Mesozoic samples were collected from Riyadh Province. Thirty-two Quaternary sand samples were collected from Nafud, Dahna corridor, and the western part of AlRub'AlKhali deserts and ground with corundum in a McCrone micronizing mill for 3 minutes. The resulting powder was screened using a 75-μm sieve, and then packed through back loading the specimen holder. X-ray diffractograms were recorded in a PANalytical Empyrean diffractometer operated at 45 kV and 40 mA using CuKα radiation. Samples were scanned from 10 to 110° 2θ at 0.005° 2θ increments, with 40 s counting time per increment. Clear euhedral quartz (FossilEra Co.) was used as a reference. Powder diffraction files are given in XRDML format. Sampling Locations are given in KML format. IDs, locations, coordinates, and lithostratigraphic units of the samples are given in Table 1.

本数据集包含阿拉伯沙漠砂与阿拉伯砂岩的粉末衍射数据：其中沙漠砂为取自纳夫德（Nafud）沙漠、达赫纳（Dahna）走廊以及鲁卜哈利（AlRub'AlKhali）沙漠西部的第四纪地表砂；砂岩则为取自阿拉伯半岛北部与中部的古生代、中生代露头砂岩。研究团队从阿拉伯板块的古生代与中生代露头沉积序列中采集了40件砂岩样品，采用钢质振动盘式研磨机研磨15秒以制备粉末样品。古生代样品采自麦地那（Madinah）、焦夫（AlJawf）与盖西姆（Qasim）三省，中生代样品采自利雅得（Riyadh）省。另采集32件第四纪砂样，采样点覆盖纳夫德沙漠、达赫纳走廊与鲁卜哈利沙漠西部，以刚玉为研磨介质，在麦克雷恩微粉化研磨机（McCrone micronizing mill）中研磨3分钟。所得粉末经75μm筛网筛分后，采用背装法装入样品架。测试采用PANalytical Empyrean型X射线衍射仪，以CuKα辐射为入射光源，设置管电压45kV、管电流40mA，以0.005° 2θ为步长，在10°至110° 2θ区间内完成扫描，每个步长的计数时长为40秒。以FossilEra公司生产的纯净自形石英作为标准参考物质。粉末衍射数据以XRDML格式（XRDML）存储，采样点位信息以KML格式（KML）提供。样品的编号、采样位置、坐标及岩石地层单元详情见表1。