Hostname: page-component-cb9f654ff-hqlzj Total loading time: 0 Render date: 2025-08-20T16:41:04.352Z Has data issue: false hasContentIssue false
  • English
  • Français

An American Occurrence of Volkonskoite

Published online by Cambridge University Press:  01 January 2024

Duncan McConnell
Duncan McConnell*
Affiliation:
College of Engineering, The Ohio State University, Columbus, Ohio, USA
Get access Rights & Permissions [Opens in a new window]

Abstract

Chromium-bearing members of the montmorillonite group have been reported heretofore only for Russian localities, where they have been related genetically to serpentines. A green mineral which occurs in high-angle fissures in the Morrison formation (Upper Jurassic) near Thompsons, Utah, contains about 2 percent Cr2O3. Data were obtained by optical and electron microscopy, x-ray powder diffraction, and gravimetric and spectroscopic chemical methods. The ultimate source of the chromium remains an unresolved geochemical question, as do the sources of vanadium and uranium in the Morrison sandstone.

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

Harvey, C. E. (1947) A method of semi-quantitative spectroscopic analysis: Applied Research Laboratories, Glendale, California, 285 p.Google Scholar
Nagelschmidt, G. (1937) X-ray investigations on clays. III — The differentiation of micas by x-ray powder photographs: Zeits. Krist, v. 97A, p. 514–521.Google Scholar
Ross, C. S., and Hendricks, S. B. (1945) Minerals of the montmorillonite group and their relation to soils and clays: U. S. Geol. Survey, Prof. Paper 205-B, p. 23–77.Google Scholar
Serdiuchenko, D. P. (1933) Chrome-nontronites and their genetical relations with the serpentines of the Northern Caucasus: Mem. Soc. Russe Mineral. (Ser. 2), v. 62, p. 376–390 (Russian with English summary, p. 390-391).Google Scholar
Stokes, W. L. (1952) Uranium-vanadium deposits of the Thompsons area, Grand County, Utah: Utah Geol. Mineral. Survey, Bull. 46, 51 p.Google Scholar