Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-26T04:23:01.101Z Has data issue: false hasContentIssue false
  • English
  • Français

On an anatectic granite from Bygland, south Norway

Published online by Cambridge University Press:  05 July 2018

R. Sen  and
Ananda Deb Mukherjee
R. Sen
Affiliation:
Department of Geology, Presidency College, Calcutta
Ananda Deb Mukherjee
Affiliation:
Department of Geological Sciences, Jadavpur University, Calcutta-32
Get access Rights & Permissions [Opens in a new window]

Summary

The Pre-Cambrian granitic rocks of Bygland are structurally and texturally concordant with the metamorphosed country rocks. Both these rock types plot close together in Q-Or-Ab and Ab-An-Or normative diagrams; trace element distribution is also similar. The granite has been reconstituted from the country rocks under epidote-amphibolite facies conditions. Plagioclase feldspars show that the granite is not a ‘mature’ rock; they are, however, ‘mature’ in the country rocks and are products of typical regional metamorphism (Ohta et al, 1968). Plagioclases in the granite are relicts of country rocks showing traces of a premetamorphic crystalline state. They have been rejuvenated with the introduction of alkali material during the reconstitution.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 302 , June 1973 , pp. 216 - 223
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

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.)

References

Andersen, (O.), 1928. The genesis of some types of feldspars from granite pegmatites. Norsk. Geol. Tidsskr., 10, 116–207.Google Scholar
Dietrich, (R. V.), 1962. K-feldspars structural states as petrogenetic indicators. Ibid. 42, 394–414.Google Scholar
Kleeman, (A. W.), 1965. The origin of granitic magmas. Jour. Geol. Soc. Aust., 12, 35–52.Google Scholar
[Makhlaev, (L. V.) and Korotkevich, (A. F.)] , 1968. (Triclinicity and ordering of potassium feldspars in Pre-Cambrian granite in Taimyr) (Compt. Rend. Acad. Sci. URSS), 181, 702–5.Google Scholar
Mehnert, (K.), 1968. Migmatites and the origin of granitic rocks. Amsterdam (Elsevier).Google Scholar
Ohta, (Y.), Honahasi, (M.), Kim, (C. W.), and Tsuchiya, (T.), 1968. Co-existence of plagioclases of different compositions in some plutonic and metamorphic rocks. Lithos, 1, 356–76.Google Scholar
Platen, (H. von), 1965. Kristallisation granitischer schmelzen. Beitr. Min. Petr., 11, 336–83.Google Scholar
Ramberg, (H.), 1952. The origin of metamorphic and metasomatic rocks: a treatise on recrystallization and replacement in the earth's crust. Chicago (Univ. Press).Google Scholar
Sen, (R.) and Mukherjee, (A. D.), 1971. Study of quartz fabric in determining the nature of granite: an example from South Norway. Quart. Jour. Geol. Min. Met. Soc. India., 43.2, 103-5.Google Scholar
Shelley, (D.), 1967. Myrmekite and myrmekite-like intergrowth. Min. Mag., 36, 491–503.Google Scholar
Turner, (F. J.) and Verhoogen, (J.), 1960. Igneous and metamorphic Petrology, 2nd edn. New York (McGraw Hill).Google Scholar
Tuttle, (O. F.) and Bowen, (N. L.), 1958. Origin of granite in the light of experimental studies in the system NaAlSi3Os-KAlSi3Os-SiO2-H2O. Mem. Geol. Soc. Amer., 74.Google Scholar
Winkler, (H. G. F.), 1965. Die Genese der metamorfen Gesteine. Berlin (Springer).CrossRefGoogle Scholar
Winkler, (H. G. F.) and Platen, (H. von), 1961. Geochimica Acta, 24, 48–69.Google Scholar