Affiliation:
1. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Abstract
The mineralogical and geochemical features, as well as the sequence of formation of aillikite and calcite carbonatite (CC) with pyrochlore are described for the massif of alkaline ultramafic carbonatite complexes Belaya Zima located in East Siberia. Until now, mutually exclusive information presents the temporal relationships of carbonatites and lamprophyres of the Belaya Zima massif.The sample marking the contact of aillikite and CC was comprehensive studied using analytical methods, e.g. XRF (ARL-9900XP spectrometer, ThermoFisher Scientific), ICP-MS (Element Finnigan MAT), SEM (MIRA 3 LMU (Tescan Ltd)), transmission and ore microscopy (AxioScope. A1, Zeiss), 40Ar/39Ar age determination of micas (Argus mass spectrometer, Micromass). The data obtained indicate a later formation of CC relative to aillikites and probable separation of the carbonatite melt from a single picrite-carbonatite source.
Publisher
Institute of Earth's Crust, Siberian Branch of the Russian Academy of Sciences
Subject
Earth-Surface Processes,Geophysics,Geology,Economic Geology
Reference10 articles.
1. Ashchepkov I., Zhmodik S., Belyanin D., Kiseleva O., Medvedev N., Travin A., Yudin D., Karmanov N., Downes H., 2020. Aillikites and Alkali Ultramafic Lamprophyres of the Beloziminsky Alkaline Ultrabasic-Carbonatite Massif: Possible Origin and Relations with Ore Deposits. Minerals 10 (5), 404. http://doi.org/10.3390/min10050404.
2. Chernyshova E.A., 1991. Geochemistry and Petrology of Dike Rocks of the Lower Sayan Carbonatite Complex. Geochemistry 8, 1096–1110 (in Russian)
3. Doroshkevich A.G., Veksler I.V., Izbrodin I.A., Ripp G.S., Khromova E.A., Posokhov V.F., Travin A.V., Vladykin N.V., 2016. Stable Isotope Composition of Minerals in the Belaya Zima Plutonic Complex, Russia: Implications for the Sources of the Parental Magma and Metasomatizing Fluids. Journal of Asian Earth Sciences 116, 81–96. http://doi.org/10.1016/j.jseaes.2015.11.011.
4. Kaulina T.V., 2011. Formation and Transformation of Zircon in Polymetamorphic Complexes. Brief PhD Thesis (Doctor of Geology and Mineralogy). Apatity, 38 p. (in Russian)
5. Khromova E.A., 2020. The Age and Petrogenesis of Rocks of Alkaline-Ultrabasic Carbonatite Massif of Belaya Zima in East Sayan Mts. PhD Thesis (Candidate of Geology and Mineralogy). Ulan-Ude, 164 p. (in Russian)