accessory mineral

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accessory mineral

n.
A mineral that is present in a minor amount in rocks and is not considered an essential constituent of the rock.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Accessory minerals: ilmenite, epidote, zircon and apatite occupy a small fraction of the volume.
The RM mineralogy, as shown by X-ray diffractometry, was dominated by plagioclases and pyroxens with ilmenite, magnetite, apatite and quartz as accessory minerals (Figure 1).
Epidote, quartz, muscovite, H/L and clay were accessory minerals.The complete characterization of the originally employed historic materials also provided information on the techniques, which should be respected for successful restoration programs.
In accordance with these observations, a variable proportion of interstitial minerals, including clinopyroxene, [H.sub.2]O-bearing phases (amphibole, phlogopite) and other accessory minerals (e.g.
In this paper, accessory minerals such as zircon, sphene and apatite are studied in Ghareh Gheshlagh area.
A variety of accessory minerals, including biotite, muscovite, sphene, zircon, garnet, and epidote, also occur in these rocks.
Rare earth elements in ultramafic and mafic rocks and their minerals; minor and accessory minerals.
The groundmass is composed of quartz, feldspar, devitrified glass, minor magnetite, ilmenite, pyrite, rare galena, fluorite and accessory minerals similar to those in trachyte samples (i.e., microlites of zircon, apatite, monazite, and allanite).

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