Myrmekite and strain weakening in granitoid mylonites
نویسندگان
چکیده
منابع مشابه
Frictional strength and strain weakening in simulated fault gouge: Competition between geometrical weakening and chemical strengthening
[1] Despite the importance of hydromechanical effects in fault processes, not much is known about the interplay of chemical and mechanical processes, in part because the conditions are difficult to simulate in the laboratory. We report results from an experimental study of simulated fault gouge composed of rock salt sheared under conditions where pressure solution is known to operate. At slidin...
متن کاملStrain localisation and weakening of the lithosphere during extension
Article history: We explore the sensitivity o Received 1 September 2007 Received in revised form 25 February 2008 Accepted 27 February 2008 Available online 18 March 2008
متن کاملبررسی رفتار ژئوشیمیایی سنگ‌کل و شیمی‌کانی‌های فلدسپار و بیوتیت در پهنه‌ی برشی شرق قروه (کردستان)
The studied shear zone is located in E-Qorveh (Kurdistan). The rocks of this zone are granite and granodiorite in composition. In present paper, deformed rocks, protomylonites and mylonites, are investigated in Sangin-Abad, Koh-e-Gazgaz and Poloserkan areas. Petrographic studies show that evidence of tectonic activities are such as myrmekite, recrystallized and slide alkali feldspars, fractured...
متن کامل5. Myrmekite Formed by Exsolution?
At the first site, the Weinsberg (Moldanubian) granite and an older quartzmonzonite facies of the South Bohemian pluton in Austria both contain orthopyroxene and clinopyroxene and must have crystallized from magmas at high temperatures. The granite contains orthoclase megacrysts (as much as 10 to 20 cm long), which (1) are chemically zoned with Ba-rich cores (1 to 2 % mol Cs; and locally as muc...
متن کاملGrain fragmentation in sheared granular flow: weakening effects, energy dissipation, and strain localization.
We describe the shear flow of a disordered granular material in the presence of grain fracture using the shear-transformation-zone theory of amorphous plasticity adapted to systems with a hard-core interparticle interaction. To this end, we develop the equations of motion for this system within a statistical-thermodynamic framework analogous to that used in the analysis of molecular glasses. Fo...
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ژورنال
عنوان ژورنال: Solid Earth
سال: 2018
ISSN: 1869-9529
DOI: 10.5194/se-9-1399-2018