Abstract
40Ar/39Ar isotopic ages of magnesioarfvedsonite (725.9 ± 6.3 myr) and phlogopite (637.6 ± 5.7 myr) from carbonatites of the Penchenga rock complex located in the South Trans Angara segment of the Yenisei Ridge have been determined. Based on this, the formation of the rock complex is associated with the start of the period of Neoproterozoic (725–700 Ma) rifting and alkaline magmatism in the region, the latter being associated with the former. The appearance of zones penetrable for magma of the “disseminated” rifting type is associated with the development of late collision shear dislocations in a consolidated marginal continental crust. The primary melts had a plume nature, but matter from different mantle sources intermixed in the environment of the changing geodynamic regime. The younger age of the mica was apparently caused by partial remelting of carbonatites under the influence of heat and fluids generated during the formation of the adjacent large granite massif of a younger age.
Similar content being viewed by others
References
T. Ya. Kornev, L. K. Kachevskii, A. D. Nozhkin, et al., in Regional Correlation Patterns of Magmatic and Metamorphic Rock Complexes in the Altai-Sayan Folded Region (Siberian Research Institute of Geology, Geophysics, and Mineral Resources, Novosibirsk, 1999) [in Russian].
V. V. Vrublevskii, B. G. Pokrovskii, D. Z. Zhuravlev, and G. N. Anoshin, Petrologiya 11(2), 145 (2003).
A. M. Sazonov, V. V. Vrublevskii, I. F. Gertner, et al., Dokl. Akad. Nauk 413(6), 798 (2007).
A. D. Nozhkin, O. M. Turkina, T. B. Bayanova, et al., Geol. Geofiz. 49(7), 666 (2008).
V. A. Vernikovsky, A. E. Vernikovskaya, A. B. Kotov, et al., Tectonophysics 375(1–4), 147 (2003).
V. A. Vernikovskii and A. E. Vernikovskaya, Geol. Geofiz. 47(1), 35 (2006).
I. I. Likhanov, P. S. Kozlov, O. P. Polyanskii, et al., Dokl. Akad. Nauk 412(6), 799 (2007).
I. I. Likhanov, V. V. Reverdatto, P. S. Kozlov, and A. V. Travin, Dokl. Akad. Nauk 433(6), 796 (2010).
I. I. Likhanov, V. V. Reverdatto, and A. V. Travin, Dokl. Akad. Nauk 435(3), 372 (2010).
V. V. Yarmolyuk, V. I. Kovalenko, E. B. Sal’nikova, et al., Dokl. Akad. Nauk 404(3), 400 (2005).
V. A. Vernikovskii, A. E. Vernikovskaya, E. B. Sal’nikova, et al., Dokl. Akad. Nauk 419(1), 90 (2008).
A. V. Lapin, V. V. Ploshko, and A. A. Malyshev, Geol. Rudn. Mestor. 1, 30 (1987).
V. S. Sobachenko, G. S. Plyusnin, G. P. Sandimirova, and Yu. A. Pakhol’chenko, Dokl. Akad. Nauk 287(5), 1220 (1986).
V. A. Kononova, Jacupirangite-Urtite Series of Alkaline Rocks (Nauka, Moscow, 1976) [in Russian].
T. Morikiyo, T. Miyazaki, H. Kagami, et al., in Proceedings of the International Workshop on Alkaline Magmatism and the Problems of Mantle Sources (Irkutsk, 2001), pp. 69–84.
Author information
Authors and Affiliations
Additional information
Original Russian Text © V.V. Vrublevskii, V.V. Reverdatto, A.E. Izokh, I.F. Gertner, D.S. Yudin, P.A. Tishin, 2011, published in Doklady Akademii Nauk, 2011, Vol. 437, No. 4, pp. 514–519.
Rights and permissions
About this article
Cite this article
Vrublevskii, V.V., Reverdatto, V.V., Izokh, A.E. et al. Neoproterozoic carbonatite magmatism of the Yenisei Ridge, Central Siberia: 40Ar/39Ar geochronology of the Penchenga rock complex. Dokl. Earth Sc. 437, 443–448 (2011). https://doi.org/10.1134/S1028334X11040088
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1028334X11040088