Show simple item record

dc.contributor.authorMalehmir, A.
dc.contributor.authorDahlin, P.
dc.contributor.authorLundberg, E.
dc.contributor.authorJuhlin, Christopher
dc.contributor.authorSjöström, H.
dc.contributor.authorHögdahl, K.
dc.date.accessioned2017-01-30T11:10:29Z
dc.date.available2017-01-30T11:10:29Z
dc.date.created2015-10-29T04:10:04Z
dc.date.issued2011
dc.date.submitted2015-10-29
dc.identifier.citationMalehmir, A. and Dahlin, P. and Lundberg, E. and Juhlin, C. and Sjöström, H. and Högdahl, K. 2011. Reflection seismic investigations in the Dannemora area, central Sweden: Insights into the geometry of polyphase deformation zones and magnetite-skarn deposits. Journal of Geophysical Research: Solid Earth. 116 (11).
dc.identifier.urihttp://hdl.handle.net/20.500.11937/9090
dc.identifier.doi10.1029/2011JB008643
dc.description.abstract

The Bergslagen region is one of the most ore prospective districts in Sweden. Presented here are results from two nearly 25 km long reflection seismic profiles crossing this region in the Dannemora mining area. The interpretations are constrained by seismic wave velocity measurements on a series of rock samples, cross-dip analysis, prestack time migration, and swath 3-D imaging, as well as by other available geophysical and geological observations. A series of major fault zones is imaged by the seismic data, as is a large mafic intrusion. However, the most prominent feature is a package of east-dipping reflectors found east of the Dannemora area that extend down to at least 3 km depth. This package is associated with a polyphase, ductile-brittle deformation zone with the latest ductile movement showing east-side-up or reverse kinematics. Its total vertical displacement is estimated to be in the order of 2.5 km. Also clearly imaged in the seismic data is a steeply dipping reflector near the Dannemora mine that extends down to a depth of at least 2.2 km. The geological nature of this reflector is not known, but it could represent either a fluid-bearing fault zone or a deep-seated iron deposit, making it an important target for further detailed geophysical and geological investigations. Copyright 2011 by the American Geophysical Union.

dc.publisherBlackwell Publishing Ltd
dc.titleReflection seismic investigations in the Dannemora area, central Sweden: Insights into the geometry of polyphase deformation zones and magnetite-skarn deposits
dc.typeJournal Article
dcterms.dateSubmitted2015-10-29
dcterms.source.volume116
dcterms.source.number11
dcterms.source.titleJournal of Geophysical Research: Solid Earth
curtin.digitool.pid233508
curtin.pubStatusPublished
curtin.refereedTRUE
curtin.departmentDepartment of Exploration Geophysics
curtin.identifier.scriptidPUB-VC-ORD-SA-24183
curtin.identifier.elementsidELEMENTS-99878
curtin.accessStatusOpen access via publisher


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record