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Noncoaxial K-feldspar and AMS subfabrics in the Land’s End granite, Cornwall: Evidence of magmatic fabric decoupling during late deformation and matrix crystallization
- 1.0348502 - GFÚ 2011 RIV US eng J - Journal Article
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
R&D Projects: GA AV ČR KJB300120702
Grant - others:GA ČR(CZ) GA205/03/0336; FCT(PT) PTDC/CTE-GIX/098696/2008
Institutional research plan: CEZ:AV0Z30120515
Keywords : triaxial ellipsoidal particles * magnetic susceptibility * theoretical models
Subject RIV: DB - Geology ; Mineralogy
Impact factor: 3.303, year: 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.
Permanent Link: http://hdl.handle.net/11104/0189027
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