KSIĄŻKI POWIĄZANE ZE SŁOWEM «PERISTERITE»
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The plagioclase compositions ranged between XA„ = 0.0 to 0.44 but with very few
compositions in the peristerite gap (XA„ 0.10-0.20). The scapolite-plagioclase
data can be grouped broadly into three categories: low-grade assemblages from
...
William Alexander Deer, Robert Andrew Howie, 2004
1 1 .4.3 The peristerite gap in plagioclase Becke (1903) was among the earliest
observers who considered that plagioclase becomes more calcic with increasing
metamorphic grade. Early workers unanimously considered the compositional ...
3
Gems: Their Sources, Descriptions and Identification
Peristerite is the name given to iridescent albite-oligoclase lamellar intergrowths (
see also peristerescence and moonstone). The most beautiful peristerite is said
to be found at Monteagle, Hastings County, Ontario, and this material has been ...
4
Feldspars and their Reactions: [proceedinsg of the NATO ...
Peristerite gap. Summarising from Smith and Brown (1988), the maximum extent
of the peristerite two phase field is generally taken to be ~An| to ~An25. A variety
of exsolution structures has been described in natural samples, some of which ...
5
The Feldspars: Proceedings of a NATO Advanced Study ...
17 (a) (left) E lectron diffraction pattern of a typical peristerite (specimen 301,
An10). (b) (right) Superimposed oligoclase and albite reciprocal lattice sections
corresponding to the diffraction pattern of (a). 3.4 The peristerite structure, An3 to
...
W. S. MacKenzie, J. Zussman, 1974
6
Geological Survey Professional Paper
0rville (1974) suggested that instead of being the result of a two-phase solvus,
the peristerite gap may be the result of a transition loop between low albite and
high plagioclase that has the maximum temperature point anchored at the pure ...
Geological Survey (U.S.), 1981
7
Introduction to Metamorphic Textures and Microstructures
The 'peristerite gap' in metabasic rocks at low P (2 kbar) has been studied in
detail by Maruyama et a1. (1982). They found that the transition zone consisting
of 'peristerite pairs' + Ep + Chl + Ca-amph (usually Act + Hbl) + Qtz + Spn occurs
...
Barker, A.J. (Department of Geology, University of Southampton), Barker a J (Department of Geology University of Southampton), 2013
8
New Zealand Journal of Geology and Geophysics
to outline the peristerite solvus. A myrmekitic texture is associated with the
peristeritic feldspars in the uppermost garnet and lowermost oligoclase zones.
The feldspars co-existing with the staurolite are associated with a myrmekitic
texture but ...
9
The identification of detrital feldspars
An X-ray and optical investigation of the peristerite plagioclases. Am.
Mineralogist, 45: 626-644. RIEBE, P. H. 1962. Observations on the nature of
unmixing in peristerite plagioclases. Norsk Geol. Tidsskr., 42 (Feldspar Volume):
138-152.
10
Introduction to Metamorphic Textures and Microstructures
The 'peristerite gap' in metabasic rocks at low P (2 kbar) has been studied in
detail by Maruyama et al. (1982). They found that the transition zone consisting of
'peristerite pairs' + Ep + Chl + Ca-amph (usually Act + Hbl) + Qtz + Spn occurs ...
A. J. Barker, A. J. Barker (Ph. D.), 1998
