Petrography
The N-S trending Central-Aldan magnesiocarbonatite province is located in the Aldan-Stanovoy shield (South Yakutia Russia). Several apatite-dolomitic carbonatite occurrences were studied: Seligdar Muostalaah Ust-Chulman and Birikeen. Mineralogical and petrographic investigations indicate intense hyd...
Published in: | Mineralogy and Petrology |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2019
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Subjects: | |
Online Access: | https://doi.org/10.1007/s00710-019-00661-3 http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000720748 |
Summary: | The N-S trending Central-Aldan magnesiocarbonatite province is located in the Aldan-Stanovoy shield (South Yakutia Russia). Several apatite-dolomitic carbonatite occurrences were studied: Seligdar Muostalaah Ust-Chulman and Birikeen. Mineralogical and petrographic investigations indicate intense hydrothermal-metasomatic alteration and metamorphism which are reflected in the evolution of the mineral parageneses. The primary minerals are fluorapatite magnetite ilmenite dolomite K-feldspar phlogopite and accessory zircon titanite baddeleyite and thorite. The hydrothermal-metasomatic minerals are quartz calcite and siderite aggregates with haematite monazite-(Ce) xenotime-(Y) rutile-(Nb) barite-(Sr) anhydrite ancylite-(Ce) and rare sulphide mineral phases. Alkaline rocks associated with the Muostalaah complex were also studied. The following U-Pb ages have been obtained (Ma): 1930 ± 7 for Muostalaah alkaline basic rocks 1906 ± 6 for Muostalaah carbonatites and 1880 ± 13 and 1878 ± 17 for Seligdar and Ust-Chulman carbonatites respectively. |
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