TY - JOUR

T1 - Stability of zircon in the system MgO–SiO 2 –H 2 O at 2.5 GPa

AU - Dobretsov, N. L.

AU - Chepurov, A. I.

AU - Sonin, V. M.

AU - Zhimulev, E. I.

N1 - Publisher Copyright: © 2019, V.S. Sobolev IGM, Siberian Branch of the RAS.

PY - 2019/4

Y1 - 2019/4

N2 - We report preliminary experimental data on the interaction of zircon with the peridotitic assemblage olivine + serpentine at 2.5 GPa and 1400 °C. In these conditions, zircon is unstable and decomposes with the formation of baddeleyite. Therefore, it is unlikely that zircon could survive in ultramafic rocks for a long time in the presence of a fluid phase at high temperatures. Thus, rigorous constraints on boundary conditions are required for the use of zircon in the dating of high-temperature geologic processes.

AB - We report preliminary experimental data on the interaction of zircon with the peridotitic assemblage olivine + serpentine at 2.5 GPa and 1400 °C. In these conditions, zircon is unstable and decomposes with the formation of baddeleyite. Therefore, it is unlikely that zircon could survive in ultramafic rocks for a long time in the presence of a fluid phase at high temperatures. Thus, rigorous constraints on boundary conditions are required for the use of zircon in the dating of high-temperature geologic processes.

KW - Baddeleyite

KW - High pressure

KW - High temperature

KW - Peridotitic mineral assemblage

KW - Zircon

KW - MINERALS

KW - CHINA

KW - AQUEOUS FLUIDS

KW - high pressure

KW - high temperature

KW - SOLUBILITY

KW - zircon

KW - CARBONATE

KW - TEMPERATURES

KW - baddeleyite

KW - PROTOLITH

KW - peridotitic mineral assemblage

UR - http://www.scopus.com/inward/record.url?scp=85064979513&partnerID=8YFLogxK

U2 - 10.15372/RGG2019043

DO - 10.15372/RGG2019043

M3 - Article

AN - SCOPUS:85064979513

VL - 60

SP - 447

EP - 450

JO - Russian Geology and Geophysics

JF - Russian Geology and Geophysics

SN - 1068-7971

IS - 4

ER -