Počet záznamů: 1

Noncoaxial K-feldspar and AMS subfabrics in the Land’s End granite, Cornwall: Evidence of magmatic fabric decoupling during late deformation and matrix crystallization

  1. 1.
    0348502 - GFU-E 2011 RIV US eng J - Článek v odborném periodiku
    Kratinová, Zuzana - Ježek, J. - Schulmann, K. - Hrouda, F. - Shail, R. K. - Lexa, O.
    Noncoaxial K-feldspar and AMS subfabrics in the Land’s End granite, Cornwall: Evidence of magmatic fabric decoupling during late deformation and matrix crystallization.
    Journal of Geophysical Research. Roč. 115, B9 (2010), B09104/1-B09104/21 ISSN 0148-0227
    Grant CEP: GA AV ČR KJB300120702
    Grant ostatní: GA ČR(CZ) GA205/03/0336; FCT(PT) PTDC/CTE-GIX/098696/2008
    Výzkumný záměr: CEZ:AV0Z30120515
    Klíčová slova: triaxial ellipsoidal particles * magnetic susceptibility * theoretical models
    Kód oboru RIV: DB - Geologie a mineralogie
    Impakt faktor: 3.303, rok: 2010

    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.
    Trvalý link: http://hdl.handle.net/11104/0189027