Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-05T05:06:52.157Z Has data issue: false hasContentIssue false
  • English
  • Français

Nahcolite (NaHCO3) in inclusions in apatites from some E. African ijolites and carbonatites

Published online by Cambridge University Press:  05 July 2018

A. H. Rankin  and
M. J. Le Bas
A. H. Rankin
Affiliation:
Department of Geology, University of Leicester, LE1 7RH
M. J. Le Bas
Affiliation:
Department of Geology, University of Leicester, LE1 7RH
Get access Rights & Permissions [Opens in a new window]

Summary

Nahcolite (NaHCO3) is identified and recorded for the first time from an igneous rock. Often associated with it is another carbonate mineral tentatively identified as kalicine (KHCO3), which has not previously been recorded as a primary mineral in any rock. These minerals occur in inclusions in apatite crystals in ijolites and carbonatites, and indicate that both ijolite and carbonatite magma must have been considerably richer in soda and potash than is indicated by the chemical analyses of the rocks. The identification was made by a combination of microchemical, solubility, crystallographic, and optical determinations.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 305 , March 1974 , pp. 564 - 570
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1974

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

Dawson, (J. B.), 1966. In Carbonatites, ed. Tuttle, (O.F.) and Gittins, (J.), New York (Interscience), 155-58.Google Scholar
Eckermann, (H. Von), 1948. Intern. Geol. Congr. z8th Sess., Great Britain,, 3, 94.Google Scholar
Fahey, (J. J.), 1962. U.S.G.S. Prof. Paper, 405.Google Scholar
King, (B. C.), LE BAS, (M. J.), and Sutherland, (D. S.), 1972. Journ. Geol. Soc., 128,173.CrossRefGoogle Scholar
LE Bas, (M. J.), Mills, (A. A.), and Ranktn, (A. H.), 1972. Nature,, 239,2r5.CrossRefGoogle Scholar
Palache, (L.), Berman, (H.), and Frondel, (C.), 1951. The System of Mineralogy,, 7th edn, 2, New York and London (Wiley and Sons).Google Scholar
Porter, (M. W.) and Spiller, (R. C.), 1956. The Barker index of crystals,, 2 part 2. Cambridge (Heifer and Sons).Google Scholar
Rankin, (A. H.) and LE BAS, (M. J.), 1973. Journ. Geol. Soc., 129,319.Google Scholar
Roedder, (E.), 1962. Sci. Amer., 207,38-47.CrossRefGoogle Scholar
Roedder, (E.), 1970. Schweiz. Min. Petr. Mitt., 50, 41–58.Google Scholar
Roedder, (E.), 1972. U.S.G.S. Prof. Paper, 440-dJ.Google Scholar
Weast, (R. C.), 1965. Handbook of Chemistry and Physics,, 46th edn, Ohio (The Chemical Rubber Co., Ohio).Google Scholar
Winchell, (W.) and Winchell, (A. N.), 1964. The Microscopical Characters of Artificial Inorganic Solid Substances, New York (Academic Press).Google Scholar
Wyllie, (P. J.), 1966. In Carbonatites. Ed. Tutrle, (O.F.) and Gittins, (J.), New York (Interscience), 311-52.Google Scholar