Reflection seismic characterization of the Grängesberg iron deposit and its mining-induced structures, central Sweden
2014 (English)Conference paper, Abstract (Refereed)
Reflection seismic investigation has been conducted on the Grängesberg apatite iron deposit. At the timeof closure in 1989, the mine was operated at about 650 m below the surface. Mining activities might beresumed in the next years, which require better understanding of (1) the ore geometry and (2) the faultnetwork which has developed up to the surface from excavated zones at depth. Two E-W orientedreflection lines with a total length of 3.5 km were acquired. The seismic lines intersect the Grängesbergore body and open pit, as well as several of the mining-induced faults. A weight drop mounted on anhydraulic bobcat truck was used as a seismic source; both cabled and wireless receivers were used for thedata recording. Preprocessing of the data first required the cable- and wireless- recorded datasets to bemerged before stacking all data available at each shot point. The dataset exhibits several shallowreflections which are likely to occur on steep lithologic or tectonic structures. Other deeper reflections arerecorded; careful processing will be carried out in order to preserve such events in final stacked sectionsand help with refining the geological model of the area.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:uu:diva-286574DOI: 10.3997/2214-4609.20140517OAI: oai:DiVA.org:uu-286574DiVA: diva2:921739
76th EAGE Conference and Exhibition, 16-19, 2014, Amsterdam, Netherlands