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Magnetic and plagioclase linear fabric discrepancy in dykes: a new way to define the flow vector using magnetic foliation

2002-07Journal article Restricted access
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dc.contributor.authorGeoffroy, L.
dc.contributor.authorCallot, J. P.
dc.contributor.authorAubourg, C.
dc.contributor.authorMoreira, M.
dc.date.accessioned2014-06-02T12:18:45Z
dc.date.available2014-06-02T12:18:45Z
dc.date.issued2002-07
dc.description.abstractIn basaltic dykes the magnetic lineation K1 (maximum magnetic susceptibility axis) is generally taken to indicate the flow direction during solidification of the magma. This assumption was tested in Tertiary basaltic dykes from Greenland displaying independent evidence of subhorizontal flow. The digital processing of microphotographs from thin sections cut in (K1, K2) planes yields the preferred linear orientation of plagioclase, which apparently marks the magma flow lineation. In up to 60% of cases, the angular separation between K1 and the assumed flow direction is greater than 45degrees. This suggests that the uncorroborated use of magnetic lineations in dykes is risky. A simple geometrical method is proposed to infer the flow vector from AMS in dykes based solely on magnetic foliations.por
dc.identifier.citationGEOFFROY. L.; CALLOT, J. P.; AUBOURG, C.; MOREIRA, M. - Magnetic and plagioclase linear fabric discrepancy in dykes: a new way to define the flow vector using magnetic foliation. Terra Nova. ISSN 0954-4879. Vol. 14, nr. 3 (2002), p. 183-190.por
dc.identifier.issn0954-4879
dc.identifier.other10.1046/j.1365-3121.2002.00412.x
dc.identifier.urihttp://hdl.handle.net/10400.21/3597
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherWiley- Blackwellpor
dc.relation.publisherversionhttp://onlinelibrary.wiley.com/doi/10.1046/j.1365-3121.2002.00412.x/abstract;jsessionid=CDD08963809AFBBDAB2D9FD4EE6617DD.f04t04por
dc.subjectMagmatic Flowpor
dc.subjectSusceptibility Anisotropypor
dc.subjectTroods Ophiolitepor
dc.subjectRockspor
dc.subjectDirectionspor
dc.subjectDikespor
dc.subjectEmplacementpor
dc.subjectIndicatorspor
dc.subjectParticlespor
dc.subjectOrientationspor
dc.titleMagnetic and plagioclase linear fabric discrepancy in dykes: a new way to define the flow vector using magnetic foliationpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceMaldenpor
oaire.citation.endPage190por
oaire.citation.issue3por
oaire.citation.startPage183por
oaire.citation.titleTerra Novapor
oaire.citation.volume14por
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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