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Zircons of Summit Rock, Oregon

Huneke, J. C. and Rossman, George R. (1978) Zircons of Summit Rock, Oregon. Mineralogical Record, 9 (6). pp. 392-393. ISSN 0026-4628.

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Crystals of a variety of minerals, including feldspars, pyroxenes, ilmenite, apatites and tridymite project into cavities in a basaltic andesite body at Summit Rock. Oregon. One widely distributed minor mineral occurs as individuals and clusters of pale pink crystals ranging up to 0.3 mm in length, and is notable for the diverse habits in which it is found. These crystals had previously been identified as rutile on the basis of morphology (Kleck, 1970) and are labeled as such in many micromount collections. However, our studies show that the mineral is actually zircon. This identification was obtained by energy dispersive X-ray analysis, which showed that zirconium and silicon were the only cations present as major constituents. Titanium in particular was absent. The infrared absorption pattern of a typical crystal confirmed that it is a nonmetamict zircon.

Item Type:Article
Related URLs:
URLURL TypeDescription
Rossman, George R.0000-0002-4571-6884
Additional Information:© 1978 The Mineralogical Record Inc. A portion of this study was funded by the National Science Foundation Grant EAR 77-23147.
Funding AgencyGrant Number
NSFEAR 77-23147
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Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences3087
Issue or Number:6
Record Number:CaltechAUTHORS:20130402-105154007
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Official Citation:Huneke, J.C. & Rossman, G. R. (1978): Zircons of Summit Rock, Oregon. Mineralogical Record. 6, 392-393
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37720
Deposited By: Tony Diaz
Deposited On:15 Apr 2013 18:14
Last Modified:26 Nov 2019 11:15

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