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oa 3D Prestack Depth Imaging of the Iron-Oxide Deposit in the Ludvika Mining Area (Central Sweden)
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, NSG2020 3rd Conference on Geophysics for Mineral Exploration and Mining, Dec 2020, Volume 2020, p.1 - 5
Abstract
A 3D seismic data set has been acquired at the Blötberget iron-oxide mining site of the Bergslagen mineral province in central Sweden. A 3D focusing seismic imaging technique accompanied by 3D first-arrival traveltime tomography to obtain a P-wave velocity model of the shallow subsurface have been applied to the 3D data set after basic pre-processing. As a result, a high-quality 3D seismic cube with several dominant structural features has been obtained in depth. One distinct reflector can be related to the southeast dipping mineralisation and a major conjugate reflector with opposite dip crosscuts this mineralisation reflector at greater depth. Our findings verify earlier studies based on 2D seismic profiles in that area and, beside a significantly improved data quality, now also provide 3D structural information about the true spatial dips of the imaged structures. The high-resolution 3D seismic cube serves as a good basis for building a 3D model of the deposit and its internal architecture including future prospectivity modelling to estimate its economic potential.
