Hostname: page-component-669899f699-qzcqf Total loading time: 0 Render date: 2025-05-06T19:04:52.069Z Has data issue: false hasContentIssue false
  • English
  • Français

Some petrological aspects of order-disorder in feldspars

Published online by Cambridge University Press:  14 March 2018

A. S. Marfunin
A. S. Marfunin*
Affiliation:
Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Academy of Sciences of the USSR, Moscow
Get access Rights & Permissions [Opens in a new window]

Summary

The results are presented of some recent feldspar studies that relate the fundamental concepts of order-disorder series to petrological problems. New diagrams have been prepared with coordinates ‘optical properties-chemical composition-structural state’. From direct observations made on natural minerals some conclusions have been reached about the sequence in which the solid-state transformations of ordering, unmixing, and twinning occur in feldspars.

A study has been made of the geological distribution of different structural types of alkali feldspars in single intrusive bodies (Tertiary granite, Palaeozoic syenite, Pre-cambrian charnockite), in magmatic complexes, and in different complexes of the Ukrainian Shield and the Caucasus Geosynclinal Province.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 33 , Issue 259 , December 1962 , pp. 298 - 314
Copyright
Copyright © 1962, The Mineralogical Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

page 298 note 1 See references in papers of the Feldspar-Symposium in Cursillos y eonferencias, Instituto ‘Lucas Mallada', 1961, Fasc., Madrid

page 299 note 1 A. Michel-Lévy, Étude sur la d6termination des feldspats dans les plaques, minces, 1984, Paris.

page 299 note 2 Nikitin, V. V. [Hиҡиtин, B. B.], Tschermaks Min. Petr. Mitt., 1933, ser. 2, vol. 44, p. 117 Google Scholar.

page 299 note 3 A. Köhler, Tschermaks Min. Petr. Mitt., 1941, voI. 53, p. 24.

page 299 note 4 A. S. Marfunin [A. C. MapΦyнин],ДoҡлaдbI. Hayҡ CCCP [Comp. Rend. Aead. Sci. URSS], 1958, vol. 118, p. 1183; И3B. Дoҡлaды. Hayҡ CCCP, Cep. reom [Bull. Acad. Sci. URSS, Sér. géol.], 1960, no. 5, p. 88.

page 299 note 6 Burri, C., Sehweiz. Min. Petr. Mitt., 1956, vol. 36, p. 539.Google Scholar.

page 299 note 6 [A. N. Zavaritskii, V. S. Sobolev, L. G. Kvasha, V. P. Kostyuk, and A. P. Bobrievich] A. H. 3aBapидҡий, B. C. CoϭoaeB, Л. г. ҠBaшa, B. I I . ҠOCTIOҡ H A. II. BoϭpneBич Зaп. Bcecoю3. MиM oϭш. [Mem. All-Union Min. Soc.], 1958, vol. 87, p. 529.

page 299 note 7 In labradorites it is only possible to observe one optic axis by inclining the universal stage when the trace of the (010) cleavage is visible and the twins are not superposed.

page 300 note 1 C. Burri and E. Wenk, Feldspar-Symposium, Cursillos y conferencias, Instituto 'Lucas Mallada', 1961, Fasc. 8, :Madrid.

page 300 note 2 A. S. Marfunin, 1961, Feldspar-Symposium, Cursillos y conferencias, Instituto 'Lucas Mallada', 1961, Fasc. 8, Madrid.

page 302 note 1 The common axis of the individual indicatrices may, of course, beα,β,or γ;ά,β́,γ ́,,α ́,and a’all lie in the plane normal to this common axis.

page 302 note 2 S. Tsuboi, , Min. Mag., 1923, vol. 20, p. 108 CrossRefGoogle Scholar. 1 [A. S. Marfunin] A. C. MapΦyДoҡлaды Aҡaд,. Hayҡ CCCP [Compt. Rend. Acad. Sci. URSS], 1959, vol. 127, p. 869.

page 304 note 2 G. B. Bokii, Crystallochemistry, 1960, Moscow University Publishing House.

page 304 note 1 [A. S. Marfunin] A. C. MapΦyДoҡлaды Aҡaд,. Hayҡ CCCP CCCP [Proc. Min. Mus. Acad. Sci. USSR], 1961, vol. 12.

page 306 note 1 [The triad method of determination of plagioclase twins]. CCP [Publ. Acad. Sei. Armenian SSR], 1951.

page 306 note 2 [A. S. Marfnnin] [Bull. higher educational inst., ser. geol.], 1959.

page 306 note 3 [L. A. Vardanyants] CCP [Publ. Acid. Sei. Armenian SSR], 1952.

page 307 note 1 A. S. Marfunin, in Feldspar-Symposium, 1961 (loc. cit.).

page 307 note 2 F. Laves, Journ. Geol. (Chicago), 1952, vol. 58, p. 548.

page 307 note 3 [A. S. Marfunin] All-Union Min. Soc.], 1960, vol. 89, p. 623.

page 309 note 1 [D. S. Belyankin] [Bull. Acad. Sci. URSS, Sér. géol.], 1937, no. 2, p. 225; 1944, no. 5, p. 65.

page 309 note 2 [L. A. Vardanyants] Soc. Russe Min.], 1937, vol. 66, p. 441.

page 309 note 3 [V. P. Petrov] [Trans. Inst. Geol. Acad. Sci. USSR], 1955, vol. 167.

page 309 note 4 [G. D. Afanasev] [Bull. Acad. Sci. URSS, Sér. géol.], 1951, no. 7.

page 309 note 5 IV. K. Monieh] [Problems of Petrology and mineralogy, Acad. Sei. USSR], 1953, vol. 2.