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.
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Despite the on-going Ebola crisis AMR Gold has recommenced its exploration and evaluation programmes on its three Loko Hills Exploration Licences for gold, tin, coltan and accessory minerals.
Contract notice: Purchase of two mass spectrometers for basic research of stable isotopes and accessory minerals necessary for their effective functioning.
In this paper, accessory minerals such as zircon, sphene and apatite are studied in Ghareh Gheshlagh area.
Zircon, opaque minerals, titanite and Fe oxides are present in the rock as accessory minerals.
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.
We suggest that the reason for this lies in the physical effect of hydraulic sorting on coarser REE-bearing accessory minerals which have been left behind during fluvial transport of these river gravels.
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.
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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