Solution–precipitation of K-feldspar in deformed granitoids and its relationship to the distribution of water

We have investigated K-feldspar recrystallisation in granitoid mylonites within a ductile shear zone from the Ryoke metamorphic belt, SW Japan. Fine-grained K-feldspar (20μm on average) occurs in the matrix and in pull-apart areas within fractured K-feldspar porphyroclasts. These fine grains are elo...

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Bibliographic Details
Published in:Tectonophysics 2012-04, Vol.532-535, p.175-185
Main Authors: Fukuda, Jun-ichi, Okudaira, Takamoto, Satsukawa, Takako, Michibayashi, Katsuyoshi
Format: Article
Language:English
Subjects:
Deformation
Electron back scatter diffraction
Fluid dynamics
Fluid flow
Fluids
Grains
IR mapping
K-feldspar
Recrystallization
Scanning electron microscopy
Solution–precipitation
Water distribution
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Summary:We have investigated K-feldspar recrystallisation in granitoid mylonites within a ductile shear zone from the Ryoke metamorphic belt, SW Japan. Fine-grained K-feldspar (20μm on average) occurs in the matrix and in pull-apart areas within fractured K-feldspar porphyroclasts. These fine grains are elongated and oriented parallel to the main foliation in the matrix, and their grain surfaces, observed with the scanning electron microscope, are not smooth, but rough due to the development of very fine (
ISSN:0040-1951
1879-3266
DOI:10.1016/j.tecto.2012.01.033