Two genetic types of peristerites in iridescent plagioclases
About authors
- 1 — Ph.D., Dr.Sci. professor Saint Petersburg State Mining Institute (Technical University)
- 2 — post-graduate student Saint Petersburg State Mining Institute (Technical University)
Abstract
Physico-mathematical modeling has shown that color of iridescent depends on spacing of peristerite lattice. The more spacing lattice, the color of iridescent is higher. The phenomenon of iridescent in plagioclases has an interferential nature. We can select two genetic types of peristerites: peristerites of decomposition and segregation peristerites. Segregation peristerites are formed from postcrystallizational consolidation of peristerites of decomposition. The form of segregation pertisrerites is one of the reasons of polychromatic iridescent genesis in plagioclases.
Область исследования:
(Archived) Geology and geophsics
Keywords:
basic and acid plagioclases
iridescent
interference
solid solution
peristerites of decomposition
segregation peristerites
anorthosites
pegmatite
References
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- Kramarenko N.K. Phase composition, lamellar structure and iridescent of plagioclases. Kiev: Naukova Dumka, 1975. 108 p.
- The minerals: Enchiridion. Vol. V. Framework alumina silicates. Pub.2. Moscow: Science, 2003. 397 p.
- Rudenko S.A. The feldspars of ceramic pegmatite from South Karelia // Zapiski LGI. 1952. V.27, N 2. P.159-195.
- Rudenko S.A. Metamorphism of minerals is impotent phenomenon in history of its formation / S.A.Rudenko, .A.Ivanov, V.A.Romanov // Zapiski VMO. 1978. N. 6. P. 697-710.
- Simakov A.P. Phisico-mathimatical interferential model of iridescent phenomenon in plagioclases // Materials of I All-Russian Scientific and Practical Conference of Students and Young Scientists « Geology in the developing world » Perm, 2010. V.1. P. 77-80.
- Furman Sh.A., Tikhonravov A.V. Basics of optics of multilayer systems. Edition Frontieres, Gif-sur-Yvette, 1992. 104 p.
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