Garnet as a carrier of the rare earth mineralization in th eIrtysh shear zone, East Kazakhstan
P.V. Ermolov, G.K. Bekenova, E.V. Musina, V.L. Levin
UDК 549.621.9:549.65(574.4)
REE mineralization (monazite and xenotime) in the plicated schist and granite gneisses of the Irtysh shear zone is established for the frst time. The minerals occur as individual grains in rocks and microscopic inclusions in red and black garnets. Red garnet (almandine-spessartine), which contains up to 5% of pyrope molecule, is low-temperature magmatic for granite gneisses and low-temperature metamorphic for schists. Black garnet (pyralspite) contains 16–18 % of pyrope molecule and is most likely detrital in origin.
Figures 6. Tables 4. References 11.
Key words: almandine, spessartine, monazite, xenotime, granitic gneisses, schists, Irtysh shear zone, Kazakhstan
P.V. Ermolov, Institute of Exploration of Mineral Resources, Karaganda, Kazakhstan; permolov@ipkon.kz
G.K. Bekenova, Satpaev Institute of Geological Sciences, Almaty, Kazakhstan;
E.V. Musina, Institute of Exploration of Mineral Resources, Karaganda, Kazakhstan;
V.L. Levin, Satpaev Institute of Geological Sciences, Almaty, Kazakhstan
- Ермолов П.В., Изох А.Э., Владимиров А.Г. Гранат как индикатор условий гранитообразования в коре // Докл. АН СССР. 1979. Т. 245б. № 1. С. 208–211.
- Ермолов П.В., Полянский Н.В. Основные этапы тектонического развития Иртышской зоны смятия: по данным изотопного анализа циркона методом ШРИМП // Геология и охрана недр. 2008. № 3 (28). С. 17–24.
- Ермолов П.В.. Хасен Б.П., Мусина Е.В. Редкоземельное оруденение коммерческого значения в метаморфическом комплексе Иртышской зоны смятия // Геология и охрана недр. 2015. № 1 (54). С. 2–8.
- Briggs S.M., Yin A., Manning C.E. Late Paleozoic tectonic history of the Ertix Fault in the Chinese Altai and its implications for the development of the Central Asian Orogenic System // Grove GSA Bulletin. 2007. July-August. Vol. 119. № 7/8. P. 944–960.
- Glorie, S., De Grave, J., Delvaux, D., Buslov, M.M., Zhimulev, F.I., Vanhaecke, F., Elburg M.A. et al. Tectonic history of the Irtysh shear zone (NE Kazakhstan): New constraints from zircon U/Pb dating, apatite fission track dating and palaeostress analyses // Journ. of Asian Earth Sciences. 2012. Vol. 45. Р. 138–149.
- Herron M. Geochemical classification of terrigenous sands and shales from core or log data // J. Sediment. Petrol. 1998. Vol. 58. Р. 820–829.
- Melnikov A., Travin A., Plotnicov A., Smirnova L., Theunissen K. Kinematics and Ar/Ar geochronology of the Irtysh shear zone in NE Kazakhstan // Continental Growth in the Phanerosoic: Evidence from East-Central Asia. 1998. First Workshop. IJCP-420. Urumqi. China. 27 July–3th August. P. 30.
- Pearce J.A., Harris N.B.W., Tindle A.G. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks // J. Petrol. 1984. Vol. 25. Р. 956–983.
- Roser B.R., Korsch R.J. Provenance signatures of sandstone-mudstone suites determined using discriminant function analysis of major-element data // Chem. Geol. 1988. Vol. 47. Р. 119–139.
- Sengör A.M.C., Natal’in B.A., Burtman V.S. Evolution of the Altaid Tectonic Collage and Paleozoic Crustal Growth in Eurasia // Nature. 1993. Vol. 364 (6435). Р. 299–307.
- Travin A.V., Boven A., Plotnikov A.V., Vladimirov V.G., Theunissen K., Vladimirov A.G., Melnikov A.I., Titov A.V. Ar-40/Ar-39 dating of ductile deformationsin the Irtysh shear zone, eastern Kazakhstan // Geochem. Int. 2001. Vol. 39 (12). P. 1237–1241.
МINERALOGY № 2 2016