Flame perthite
WebSince flame growth is controlled by the imposed differential stress and not by strain in the host rock, flame perthite has potential as a palaeostress-direction indicator. Albite flames result from the replacement of K-feldspar by albite through alkali exchange. In flame perthites from deformed granites within the Grenville Front Tectonic Zone ... WebMineralogical Society of America - Mineralogy, Petrology and ...
Flame perthite
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http://www.yyfangchan.com/wen/zuowen/1378948.html WebJan 1, 2002 · Flame perthite bearing K-feldspar is common. Braid and vein perthites occur occasionally. Paleopiezometry estimation indicates that flame perthite formed under the influence of low to moderate ...
WebMay 19, 2015 · Paleopiezometry estimation indicates that flame perthite formed under the influence of low to moderate differential stress on granitoids. Most of the perthites occurs in these granitoids are compositionally albite to oligoclase in nature. The composition ranges X Ab: 0.98–0.49 for the Malanjkhand and X Ab: 0.96–0.49 for Dongargarh granitoids. WebPasschier (1985) described flame perthites in which the distribution of flames was directly related to the amount of deformation within a K-feldspar grain, the model, flames grow by replacement behind a coherently propagating tip; the external stress influences the free energy of the process and thereby controls the orientation and extent of …
http://www.labotka.net/310/Atlas/Plates/Perthite.html WebMay 19, 2015 · Three varieties of perthites have been identified in these granitoids i.e. flame, braid, and vein types. Flame perthite bearing K-feldspar is common. Braid and …
WebWechat. Abstract. AbstractMicroprobe analyses of feldspars in granite mylonites containing flame perthite give compositions that invariably plot as three distinct clusters on a …
WebAbstract Microprobe analyses of feldspars in granite mylonites containing flame perthite give compositions that invariably plot as three distinct clusters on a ternary feldspar diagram: orthoclase (Or92–97), albite and oligoclase-andesine. The albite occurs as grains in the matrix, as flame-shaped lamellae in orthoclase, and in patches within ... highest rated snl skitsWebSep 1, 1996 · Copyright 1996 Eisevier Science Ltd INTRODUCTION Flame perthite (Fig. 1) is one of many morphologies of K-feldspar and albite intergrowths, but differs from most other perthite morphologies in that it is generally found in deformed quartzo-feldspathic rocks (e.g. Dat et al. 1978, Passchier 1982, Stel 1986). highest rated snlWebFlame perthite is the dominant feldspar microtextures in samples of Dongargarh granitoids. One of the special feature observed is a twined K-feldspar grain, which is separated by a thin calcite vein (~1 μm in width). In this sample, perthite lamella is radiating from the direction of orientation of calcite vein (Fig 2d). how has youtube developed over timeWebmicrocline twinning, (g) myrmekite, (h) flame perthite, (i) boudinage of strong minerals, typically with recrystallized aggregates of weaker minerals (e.g. quartz and mica) between the boudins, (j) foliation passing through, rather than around enclaves, and (k) heterogeneous strain with local mylonitic zones. how has zoom changed the worldhttp://stoneplus.cst.cmich.edu/perthite.htm how has zoom affected societyhttp://www.minsocam.org/MSA/AmMin/TOC/Articles_Free/1999/Vernon_p1760-1765_99.pdf highest rated snoring remedyWebFlame perthite bearing K-feldspar is common. Braid and vein perthites occur occasionally. Paleopiezometry estimation indicates that flame perthite formed under the influence of low to moderate ... highest rated snorkeling in ibiza spain