2D body-wave seismic interferometry as a tool for reconnaissance studies and optimization of passive reflection seismic surveys in hardrock environments
نویسندگان
چکیده
Despite the unrivalled spatial resolution and depth penetration of active-source seismic methods used for mineral exploration in hardrock environment, economic environmental restrictions (e.g., source permitting) may preclude its full-scale application. In such a case, 2D passive reflection seismics can be considered cost-effective way to perform reconnaissance-type survey provide body-wave structural imaging using ambient-noise interferometry (ANSI). This is, however, conditional presence noise sources subsurface, example produced by underground mining activity. Here, we propose ANSI workflow as an intermediate step prior 3D affordable tool brownfield exploration, e.g., when trying update current geological models beyond drilled area. We test applicability this approach analysing selected receiver lines from dataset acquired over Kylylahti mine Finland. Our methodology aims at choosing optimal processing strategy possibly lowest acquisition (2D geometry) computational (small amount data) cost. address fundamental questions ANSI, i.e., (i) how much AN should one record (ii) which SI choose. Therefore, different steps necessary produce virtual shot gathers (VSG): preprocessing, selection portion, method retrieving impulse responses between receivers (crosscorrelation - CC, crosscoherence CCh, multidimensional deconvolution MDD). conclude that trace energy normalization high-pass filtering are preferred preprocessing steps, while best is obtained VSGs retrieved MDD applied noise-volume or CC event-driven approach. An significantly reduce time: dataset, 10 events with energetic arrivals, extracted hour data, was enough results comparable complete noise.
منابع مشابه
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ژورنال
عنوان ژورنال: Journal of Applied Geophysics
سال: 2021
ISSN: ['1879-1859', '0926-9851']
DOI: https://doi.org/10.1016/j.jappgeo.2021.104288