accessory mineral


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accessory mineral

[ak′ses·ə·rē ‚min·rəl]
(mineralogy)
A minor mineral in an igneous rock that does not affect its general character.
References in periodicals archive ?
Poitrasson F, Hanchar JM, Schaltegger U (2002) The current state and future of accessory mineral research.
The use of epigenetic interlayer solution of some accessory minerals for establishing the time of formation of oil deposits // Epigenesis and its mineral indicators / A.
Magnetite, pyrite and apatite are ubiquitous accessory minerals.
Physicochemical and crystal-chemical controls on accessory mineral paragenesis in granitoids: implications for uranium metallogenesis.
The subject of procurement is the purchase of two mass spectrometers for basic research of stable isotopes and accessory minerals necessary for their effective functioning, such as equipment for processing and separation solutions analyzed and gas system for thermal conversion of samples, a gas chromatograph for separation and identification of compounds prior to mass spectrometric detection and determining the isotopic composition.
In order to identify the accessory minerals in the region of Ghareh Gheshlegh, field research and laboratory studies were carried out.
Calcite, Fe oxides and opaque minerals are present in the rocks as 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.
He-diffusion studies have also been conducted for other common minerals such as titanite, monazite, hematite, and zircon, all of which are common accessory minerals in igneous and metamorphic rocks.
This specific deposit contains 70 per cent calcite, a form of calcium carbonate; 10 per cent apatite, a rock phosphate (source of calcium and phosphorous); 15 per cent biotite/vermiculite; and 5 per cent of accessory minerals such as pyroxene, chlorite, magnetite, and feldspar.
The three papers in the first section focus on petrological observations combined with trace element and isotopic data of accessory minerals to link their formation with major mineral phases, and ultimately to the pressure-temperature-time path of metamorphic rocks.

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