Hostname: page-component-5c6d5d7d68-wtssw Total loading time: 0 Render date: 2024-08-24T12:44:22.594Z Has data issue: false hasContentIssue false
  • English
  • Français

The Granite Problem: Evidence from the Quartz and Feldspar of a Tertiary Granite

Published online by Cambridge University Press:  01 May 2009

O. F. Tuttle  and
M. L. Keith
O. F. Tuttle
Affiliation:
Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C.
M. L. Keith
Affiliation:
Department of Earth Sciences, Pennsylvania State University, State College, Pennsylvania.
Get access Rights & Permissions [Opens in a new window]

Abstract

The inversion temperatures of the quartz from twenty-five specimens of the Beinn an Dubhaich granite have been measured and found to correspond to the inversion temperatures of quartz from rhyolites previously studied. Optical and X-ray studies of the alkali and plagioclase feldspars indicate high temperature modifications. The Beinn an Dubhaich granite has the textural and compositional features of a granite together with mineralogical features normally associated with rhyolitic rocks. The results serve to emphasize that methods are now available which make it possible in some cases to determine whether a particular granite was formed by metamorphism of sediments or by crystallization of a magma. It is concluded that the older granites and those which crystallized at greater depths probably have undergone considerable rearrangement of their mineralogical and textural features subsequent to primary crystallization.

Type
Articles
Information
Geological Magazine , Volume 91 , Issue 1 , February 1954 , pp. 61 - 72
Copyright
Copyright © Cambridge University Press 1954

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

REFERENCES

Bowen, N. L., 1948. The Granite Problem and the Method of Multiple Prejudices. Geol. Soc. Amer., Memoir, xxviii, 79–90.Google Scholar
Bowen, N. L., and Tuttle, O. F., 1950. The System NaAlSi3O8—KAlSi3O8—H2O. Journ. Geol., lviii, 489–511.Google Scholar
Chao, S. H., and Taylor, W. H., 1940. The Lamellar Structure of Potashsoda Feldspars. Proc. Royal Soc., A, clxxiv, 57–72.Google Scholar
Chayes, F., 1952. Notes on the Staining of Potash Feldspar with Sodium Cobaltinitrite. Amer. Min., xxxvii, 337–340.Google Scholar
Harker, A., 1904. Tertiary Igneous Rocks of Skye. Mem. Geol. Surv., Scotland.Google Scholar
Keith, M. L., 1939. Selective Staining to Facilitate Rosiwal Analysis. Amer. Min., xxiv, 561–5.Google Scholar
Keith, M. L., and Tuttle, O. F., 1952. Significance of Variation in the High-low Inversion of Quartz. Amer. Journ. Sci., Bowen Vol., 203–280.Google Scholar
Laves, F., 1952. Phase Relations of the Alkali Feldspars. Journ. Geol., lx, 436–451 and 549–575.Google Scholar
Read, H. H., 1948. Granites and Granites. Geol. Soc. Amer., Memoir, xxviii, 1–19.Google Scholar
Spencer, E., 1937. The Potash-soda Feldspars: I—Thermal Stability. Miner. Mag., xxiv, 453–484.Google Scholar
Tilley, C. E., 1949. An Alkali Facies of Granite at Granite-dolomite Contacts in Skye. Geol. Mag., lxxxvi, 81–93.Google Scholar
Tilley, C. E., 1951. The Zoned Contact-skarns of the Broadford Areas, Skye: A Study of Boron-fluorine Metasomatism in Dolomites. Miner. Mag., xxix, 621–666.Google Scholar
Tilley, C. E., and Vincent, H. C. G., 1947. Cuspidine from Dolomite Contact Skarns, Broadford, Skye. Miner. Mag., xxviii, 90–5.Google Scholar
Tuttle, O. F., 1952 a. Origin of the Contrasting Mineralogy of Extrusive and Plutonic Salic Rocks. Journ. Geol., lx, 107–124.Google Scholar
Tuttle, O. F., 1952 b. Optical Studies on Alkali Feldspars. Amer. Journ. Sci., Bowen Vol., 553–567.Google Scholar
Tuttle, O. F., and Bowen, N. L., 1950. High Temperature Albite and Contiguous Feldspars. Journ. Geol., lviii, 572–583.Google Scholar