Data for "petro-mineralogical controls on seismic attenuation in volcanic rock samples"

Here we include the initial dataset acquired to develop the study presented in the article “Petro-mineralogical controls on seismic attenuation in volcanic rock samples” File ‘Data’ = Petrophysical properties of 25 core samples of volcanic rocks from cored boreholes on The Big Island of Hawai’i. Folder ‘Waveforms’= Folder 'raw': seismic ultrasonic waveforms recorded on each sample. Time in seconds and amplitude in voltage. Acquired using shear-type transducers with a piezoelectric crystal of 13 mm and a characteristic frequency of 1 MHz. The pulse repetition frequency was set at 100 Hz and the pulser voltage at 400 V using an ultrasonic square wave pulser/receiver unit (Olympus 5077PR). Folder 'Filtered': seismograms filtered (Butterworth bandpass between 20-800 kHz) used to compute Qc. Folder ‘Optical Images’= optical images under plane polarised light. The samples were imaged using a Zeiss Axio Imager M2m optical imaging system, with a magnification of 2.5x. Folder ‘uCT’= 2D slice images generated from the micro-CT scanner (Versa XRM 500 from Zeiss-XRadia) with a resolution of 4.2527 μm for the sample 1H, and 22 μm for samples 9H, 11H, 14H and 18H..本数据集为支撑论文《火山岩样品地震衰减的岩石矿物学控制因素》（Petro-mineralogical controls on seismic attenuation in volcanic rock samples）所开展的研究采集，具体内容如下： 文件「Data」：包含取自夏威夷大岛（The Big Island of Hawai’i）钻孔岩心的25件火山岩岩心样品的岩石物理性质参数。 「Waveforms」文件夹存储超声地震波形数据，分为两个子文件夹： - 子文件夹「raw」：记录每件样品的原始超声地震波形，时间单位为秒，振幅单位为伏特。本次采集采用压电晶体尺寸为13 mm、特征频率为1 MHz的剪切型换能器，搭配超声方波收发一体机（Olympus 5077PR），设置脉冲重复频率为100 Hz，激励电压为400 V。 - 子文件夹「Filtered」：存储经20~800 kHz巴特沃斯（Butterworth）带通滤波处理的地震记录，用于计算品质因子Qc。 「Optical Images」文件夹：存储样品的平面偏振光显微光学图像。本次成像采用蔡司Axio Imager M2m光学成像系统，放大倍率为2.5倍。 「uCT」文件夹：存储由蔡司-XRadia（Zeiss-XRadia）Versa XRM 500型显微CT（micro-CT）扫描仪生成的二维切片图像，其中样品1H的扫描分辨率为4.2527 μm，样品9H、11H、14H及18H的扫描分辨率为22 μm。