Seismic structure of Dante’s Domes oceanic core complex

Here presents a detailed seismic study of the Dante’s Domes OCC (DDOCC), with the main objective of characterizing structural variability and magmatic and tectonic history in this location. Downward continuation technique, combined with traveltime tomography and full waveform inversion (FWI), are employed to process the seismic refraction data from MCS dataset at domes to obtain high-fidelity velocity model. A benefit of creating an accurate velocity model through FWI is that it can be used as the input for reverse time migration (RTM), a form of pre-stack depth migration that implicitly filters much seafloor scattering, and can better resolve deeper structure. The dataset includes traveltime tomography models, FWI models, and RTM images. All the files are in SEGY format.本研究针对但丁穹洋核杂岩（Dante’s Domes OCC, DDOCC）开展了详细的地震学研究，核心目标为刻画该区域的结构变异性与岩浆-构造演化历史。研究采用向下延拓技术，结合走时层析成像与全波形反演（full waveform inversion, FWI），对采集自该穹丘区域的多道地震（MCS）折射地震数据进行处理，以构建高保真速度模型。通过全波形反演构建高精度速度模型的优势在于，其可作为逆时偏移（reverse time migration, RTM）的输入数据；逆时偏移作为一类叠前深度偏移方法，可隐性滤除大量海底散射干扰，且能更精准地解析深部结构。本数据集包含走时层析成像模型、全波形反演模型以及逆时偏移成像结果，所有文件均采用SEGY格式存储。