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Targeting VMS ore deposits within the upper 1.5 km of the crust in the central Skellefte District, northern Sweden, using 2D and 3D-resistivity/IP data
Luleå tekniska universitet, Geovetenskap och miljöteknik.
Geovista AB.
Luleå tekniska universitet, Geovetenskap och miljöteknik.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences. Luleå tekniska universitet.ORCID iD: 0000-0003-3879-3897
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2016 (English)In: Geophysical Prospecting, ISSN 0016-8025, E-ISSN 1365-2478Article in journal (Refereed) Submitted
Abstract [en]

As a part of a 4D geologic modelling project, resistivity and induced polarisation (IP) data from measurements along three profiles and from one 3D survey have been analysed in the central Skellefte district (CSD), northern Sweden. The data were collected during two field campaigns (2009 and 2010) in order to delineate the structures related to volcanogenic massive sulphide (VMS) deposits, and to visualise lithological contacts down to a maximum of 1.5 km in depth. The 2009 data were previously inverted and their joint interpretation with potential field data indicated several anomalous zones. The geophysical interpretations are supported by determined physical properties of the rocks (resistivity and chargeability) measured on drill-hole samples, as well as surface geological data and results from previous geological and geophysical studies in the area. The results revealed several high chargeability-low resistivity zones, interpreted as possible massive sulphide mineralisation and associated hydrothermal alteration. The 3D data provides a detailed, high resolution image of the top ~450 m of the upper crust around the Maurliden-East, North and Central deposits. Joint interpretation of the resistivity/chargeability data delineates the3D geometry of the Maurliden deposits and several anomalies are interpreted as new potential prospects. In addition, the geometry of geological contacts in the study area, i.e. the contact between the Skellefte Group and the Jörn Intrusive Complex and the contact between the Vargfors and Skellefte Groups, was clarified in this study.

Place, publisher, year, edition, pages
2016.
National Category
Geophysics Geology
Research subject
Ore Geology; Exploration Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-327824Local ID: 0159cbd3-528f-4885-9178-63b1494565c1OAI: oai:DiVA.org:uu-327824DiVA, id: diva2:1131006
Note

Upprättat; 2014; 20121119 (samtav)

Available from: 2016-09-29 Created: 2017-08-11

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http://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291365-2478

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