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Buddingtonite (NH4-feldspar) in the Condor Oilshale Deposit, Queensland, Australia

Published online by Cambridge University Press:  05 July 2018

F. C. Loughnan ,
F. Ivor Roberts  and
A. W. Lindner
F. C. Loughnan
Affiliation:
School of Applied Geology, University of NSW, Kensington, Australia
F. Ivor Roberts
Affiliation:
School of Applied Geology, University of NSW, Kensington, Australia
A. W. Lindner
Affiliation:
Southern Pacific Petroleum, Sydney, Australia
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Abstract

Buddingtonite of similar composition and properties to that described from the type area, is uniformly distributed throughout the upper 600 m of strata in the Condor Oilshale Deposit near Proserpine, Queensland. The mineral, which constitutes up to 16% and averages nearly 10 % of the strata, is associated with abundant montmorillonite, siderite, and quartz as well as minor amounts of disordered kaolinite, illite, calcite, pyrite, cristobalite, and an unnamed species of the jahnsite group. The buddingtonite is concluded to be of diagenetic origin. It developed in an ammonium-rich environment, most probably at significant depth within the mud beneath a stratified lake. Its progenitor, however, remains unknown. The occurrence of this mineral is also of interest in that ammonia could prove an important by-product in the commercial exploitation of the oilshales.

Type
Research Article
Information
Mineralogical Magazine , Volume 47 , Issue 344 , September 1983 , pp. 327 - 334
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1984

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