Tsymbal O.S.
https://orcid.org/0000-0002-8800-9899
Kryvdik S.G.
https://orcid.org/0000-0002-8356-1115
M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the National Academy of Sciences of Ukraine, 03142, ave. Akad. Palladina 34, Kyiv, Ukraine
https://doi.org/10.15407/gof.2023.44.009
Olivine (forsterite, rarely chrysoline) is characteristic mineral of alkaline-ultrabasic rocks in Noth-Western region of the Ukrainian shield. These rocks (melteigites, jacupirangites, melteigine-porphyries) form hypabissal intrusions and dikes. Olivines are earliest minerals but sometimes content inclusions of Cr-spinelids. Magnesian olivines are characterized by increased Cr and Ni contents, sometimes CaO that is typical for magnesian alkaline-ultrabasic rocks. By chemistry studied olivines are similar to those in kimberlites and lamproites.
Keywords: Alkaline-ultrabasic rocks, forsterite, chrysolite, minor elements (Cr, Ni).
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