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dc.contributor.author | Kussainov, Aldiyar![]() |
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dc.date.accessioned | 2024-06-27T10:32:12Z | |
dc.date.available | 2024-06-27T10:32:12Z | |
dc.date.issued | 2024-04-25 | |
dc.identifier.citation | Kussainov, A. (2024). Variations in the chrome spinel chemistry of a serpentinized mantle section, Kempersai Massif, Kazakhstan. Nazarbayev University School of Mining and Geosciences | en_US |
dc.identifier.uri | http://nur.nu.edu.kz/handle/123456789/8053 | |
dc.description.abstract | Cr-spinel, which occurs in a variety of rocks, can serve as a valuable indicator of geological processes and formation conditions. This study focuses on the three serpentinite samples, collected from the Khromtau region, Aktobe which is geologically a part of the Kempirsai massif of southern Urals. All three samples, namely AK-3, AK-4 and AK-6, contain minerals such as olivine, serpentine and chrome spinel, in varying abundance.The mineral chemistry of the chrome spinels obtained using SEM EDS technique yielded similar composition (MgO=9-11.5%; FeO= 22-23%; Cr2O3=54-59%; Al2O3=9.5-12%) except for sample AK-3, which has an increased amount of magnesium (MgO=12.5%) and aluminum (20.95%), indicating that the sample crystallized from a slightly modified magma. However, the presence of olivine with high Mg content (Fo#=0.88-0.92) in all three samples and low magnesium in the chrome spinels in samples AK-4 and AK-6 indicate that spinel samples are almost co-crystallized with olivine. It can be therefore be concluded that serpentinization has not much altered the chrome spinel chemistry and hence can be a potential indicator of the tectonic setting. With the use of various tectonic discrimination diagrams, it can be concluded that these samples belong to supra subduction zone peridotites formed in a volcanic arc environment. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Nazarbayev University School of Mining and Geosciences | en_US |
dc.subject | Research Subject Categories::NATURAL SCIENCES | en_US |
dc.subject | Chromite | en_US |
dc.subject | Chrome spinel | en_US |
dc.subject | Serpentinite | en_US |
dc.subject | Type of access: Restricted | en_US |
dc.title | VARIATIONS IN THE CHROME SPINEL CHEMISTRY OF A SERPENTINIZED MANTLE SECTION, KEMPERSAI MASSIF, KAZAKHSTAN | en_US |
dc.type | Bachelor's thesis | en_US |
workflow.import.source | science |