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
(fine-grained microlitic zircon, apatite, monazite, and allanite) were identified and confirmed using a scanning electron microscope including backscattered electron imaging, energy-dispersive X-ray spectroscopy and X-ray element mapping.
4b), indicates the absence of fine-grained phosphatic and titaniferous accessory minerals
hosting these elements.
Siderite is a more common accessory mineral
in NE Estonian rocks.
2) Accessory minerals
typically form very tiny grains that normally comprise only a fraction of one percent of the rock in which they are found.
are magnetite, zircon, monazite, fluorite, anatase, tourmaline, and garnet.
Also, mineral separates are more commonly homogeneous than large crystals, yet they require more care in purification than the large crystals due to the presence of impurities and accessory minerals
Magnetite, pyrite and apatite are ubiquitous accessory minerals
Phosphate minerals and lithian mica are the common accessory minerals
Additional evidence bearing on the evolution of the system comes from reaction microtextures of REE-Y-Th-U accessory minerals
, most notably involving monazite in three distinct habits (Dini et al.