Atlas of Mylonites- and related microstructures by Prof. Dr. Rudolph A. J. Trouw, Prof. Dr. Cees W. Passchier,

By Prof. Dr. Rudolph A. J. Trouw, Prof. Dr. Cees W. Passchier, Dirk J. Wiersma (auth.)

    1. Mylonites shape in line with excessive charges of pressure inside of deep ductile shear zones, that are the extensions at intensity of floor faults, thrusts and fault breccias. they could have many alternative mineralogical compositions and are consequently outlined by means of their textural visual appeal. This atlas offers excessive definition photos of a big variety of assorted mylonites permitting scholars and geologists to properly classify them with larger ease. It additionally bargains insights into the translation of mylonitic materials to respond to questions akin to: from what kind of rock did this mylonite derive? what have been the metamorphic situations in the course of mylonitization? what was once the depth of deformation? and what was once the experience of shear?

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Width of view 3mm. CPL.

Notice limited recrystallisation in quartz (Fig. 17), mainly by bulging. Sense of shear is dextral as indicated by the C/S fabric left of the center. Mount West, Australia. Width of view 18 mm. PPL. 56 Chapter 4 Fig. 16 As Fig. 15. Width of view 18 mm. CPL. 57 Low-Grade Mylonites Fig. 17 Detail of Fig. 16, showing a porphyroclast of K-feldspar with undulose extinction and apparent recrystallisation to very small grains mainly concentrated in the strain shadows. g. upper right) shows minor recrystallisation by bulging, consistent with low metamorphic conditions.

15. Width of view 18 mm. CPL. 57 Low-Grade Mylonites Fig. 17 Detail of Fig. 16, showing a porphyroclast of K-feldspar with undulose extinction and apparent recrystallisation to very small grains mainly concentrated in the strain shadows. g. upper right) shows minor recrystallisation by bulging, consistent with low metamorphic conditions. 25 mm. CPL. Fig. 18 Low-grade mylonitised granite. Most porphyroclasts show undulose extinction (Fig. 19). Biotite-rich seams in the matrix were strongly sheared and became C planes, separating lenses with less strain and preserved S planes (C/S fabric).

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