TY - JOUR

T1 - Thermochronology of the Cordilleran-Type Metamorphic Core Complex

T2 - The Example of the Song Chay Massif, Northern Vietnam

AU - Vladimirov, A. G.

AU - Travin, A. V.

AU - Anh, Phan Luu

AU - Murzintsev, N. G.

AU - Mikheev, E. I.

N1 - Publisher Copyright: © 2019, Pleiades Publishing, Ltd.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Based on reconstruction of the thermal evolution of the Song-Chai gneiss–granite massif (Northern Vietnam), the long-term occurrence of granitoid magma at deep levels of the Earth’s crust (H = 15–20 km, Δt ~ 20–50 Ma) is established. The geodynamic analysis and mathematical modeling of the history of consolidation and cooling of the granitoid batholith shows that the magmatic chamber was a thermal trap at the lower level of the Earth’s crust, preserving the residual granite melt for a long time. The removal of this thermal trap from the quasi-stationary state occurs in the zones of transform sliding of lithospheric plates and is accompanied by tectonic exposure of large segments of the Earth’s crust. Ultimately, this leads to transformation of the batholiths into a metamorphic core complex of the Cordilleran-type, to emplacement of residual melts, and, consequently, to the formation of commercial rare-metal deposits.

AB - Based on reconstruction of the thermal evolution of the Song-Chai gneiss–granite massif (Northern Vietnam), the long-term occurrence of granitoid magma at deep levels of the Earth’s crust (H = 15–20 km, Δt ~ 20–50 Ma) is established. The geodynamic analysis and mathematical modeling of the history of consolidation and cooling of the granitoid batholith shows that the magmatic chamber was a thermal trap at the lower level of the Earth’s crust, preserving the residual granite melt for a long time. The removal of this thermal trap from the quasi-stationary state occurs in the zones of transform sliding of lithospheric plates and is accompanied by tectonic exposure of large segments of the Earth’s crust. Ultimately, this leads to transformation of the batholiths into a metamorphic core complex of the Cordilleran-type, to emplacement of residual melts, and, consequently, to the formation of commercial rare-metal deposits.

KW - DOME

KW - PROVINCE

UR - http://www.scopus.com/inward/record.url?scp=85075100450&partnerID=8YFLogxK

U2 - 10.1134/S1028334X19100283

DO - 10.1134/S1028334X19100283

M3 - Article

AN - SCOPUS:85075100450

VL - 488

SP - 1231

EP - 1239

JO - Doklady Earth Sciences

JF - Doklady Earth Sciences

SN - 1028-334X

IS - 2

ER -