Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5786887 | Russian Geology and Geophysics | 2017 | 19 Pages |
Abstract
Geochemical and U-Pb geochronological studies have shown that the alkali syenites of the China massif have an age of 311.4 ± 1.8 Ma and potassic specialization in contrast to most massifs of the Vitim alkaline-magmatism zone. The rocks are similar in geochemistry to the nepheline syenites of the Synnyr massif, dated at 289.5 ± 3.5 Ma. The alkali syenites of the China massif formed, most likely, from crustal protoliths.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geology
Authors
I.A. Izbrodin, A.G. Doroshkevich, M.O. Rampilov, G.S. Ripp, E.I. Lastochkin, V.B. Khubanov, V.F. Posokhov, N.V. Vladykin,