Record details

    Noncoaxial K-feldspar and AMS subfabrics in the Land's End granite, Cornwall: Evidence of magmatic fabric decoupling during late deformation and matrix crystallization
    Hrouda, F.
    Ježek, J.
    Kratinová, Zuzana
    Lexa, O.
    Schulmann, K.
    Shail, R. K.
Publication type
    článek v odborném periodiku
Source title - serial
    Journal of Geophysical Research
    Roč. 115, B9
    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
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.
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
Import date
    9. 12. 2013