3D Lithological and Structural Modeling of theKevitsa 2D and 3D Reflection Seismic Data - ACase Study
2014 (English)Conference paper, Abstract (Refereed)
The Kevitsa mafic-ultramafic intrusion in northern Finland hosts a large, disseminated nickel-coppersulphide deposit. We present a 3D lithological and structural model of the Kevitsa area, obtained viamodeling of 2D and 3D reflection seismic data from Kevitsa. The Kevitsa 3D model contains modeledsurfaces of the contacts between the main lithological units and a model of the magmatic layering withinthe intrusion. The Kevitsa main mineralization is thought to be controlled by the lateral extents of thisdiscontinuous, smaller-scale magmatic layering within the intrusion. An improved knowledge of thegeometry of the intrusion, and in particular of the extent of the internal magmatic layering, provides aframework for near-mine and deep exploration in the area. Better control on the position of the basalcontact of the intrusion provides an exploration target for the contact-type mineralization. The originalpurpose of the 3D seismic survey was to provide a structural framework for geotechnical planning of themine, and accordingly the 3D seismic data were used to create a structural model of the 3D cube. Themodeled structures reveal a complex pattern of fault and fracture zones, some of which will be importantfor slope stability and operational planning at the mine.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:uu:diva-286575DOI: 10.3997/2214-4609.20140502OAI: oai:DiVA.org:uu-286575DiVA: diva2:921743