Record details

Title
    Noncoaxial K-feldspar and AMS subfabrics in the Land's End granite, Cornwall: Evidence of magmatic fabric decoupling during late deformation and matrix crystallization
Author
    Hrouda, F.
    Ježek, J.
    Kratinová, Zuzana
    Lexa, O.
    Schulmann, K.
    Shail, R. K.
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Journal of Geophysical Research
Vol./nr.
    Roč. 115, B9
Year
    2010
Notes
    MSM0021620855
    Projekt: GA205/03/0336, GA ČR, CZ
    Projekt: KJB300120702, GA AV ČR3cav_un_auth*0229083
    Projekt: PTDC/CTE-GIX/098696/2008, FCT, PT
    Rozsah: 21 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    magnetic susceptibility
    theoretical models
    triaxial ellipsoidal particles
Keyword
    AMS
    Cornwall
    Crystallization
    Decoupling
    Deformation
    During
    End
    Evidence
    Fabric
    Granite
    K-feldspar
    Land's
    Late
    Magmatic
    Matrix
    Noncoaxial
    Subfabrics
Abstract (in english)
   A comparative study of the anisotropy of magnetic susceptibility (AMS) and K-feldspar phenocryst fabrics in the Land's End granite demonstrates that the AMS fabric predominantly reflects late magmatic deformation. Tensor analysis of the K-feldspar fabric shows a complex pattern, characterized by meter-scale variations in orientation, symmetry, and intensity, mainly related to heterogeneous flow of the phenocryst-rich magma during emplacement. In contrast, the AMS fabric is predominantly homogenous, subhorizontal, and oblate, and is stable at the pluton scale.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013