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Isotope Fractionation and the Pressure Effect on 18O/16O in Kyanite-Sillimanite-Andalusite Polymorphs (Al2SiO5) : Ab-Initio Modelling. / Krylov, D. P.; Kuznetsov, A. B.; Gavrilova, A. A.

In: Doklady Earth Sciences, Vol. 491, No. 2, 01.04.2020, p. 235-237.

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@article{24783289665b4f049fd5471765456638,
title = "Isotope Fractionation and the Pressure Effect on 18O/16O in Kyanite-Sillimanite-Andalusite Polymorphs (Al2SiO5): Ab-Initio Modelling",
abstract = "Abstract: The β-factor dependences on temperature upon 18O/16O substitution have been originally deduced in andalusite, sillimanite and kyanite accounting for pressure effect: 1000lnβand(18O/16O) = 10.66466x – 0.19330x2 + 0.00282x3 + P(0.12748x – 0.00289x2) 1000lnβsil(18O/16O) = 10.51480x – 0.17485x2 + 0.001406x3 + P(0.12124x – 0.00286x2) 1000lnβky(18O/16O) = 10.14019x – 0.07573x2 + 0.00550x3 + P(0.09907x – 0.00206x2), x = 106/T2 (K)–2, P is pressure (GPa). The relations can be used in isotope geothermometry. Pressure produces an increase of the β-factors and consequently, δ18OAI2SiOS up to ≈0.5‰ in conditions of the “cold” subduction (at extremely low dT/dP gradients).",
keywords = "AlSiO, geothermometry, β-factors",
author = "Krylov, {D. P.} and Kuznetsov, {A. B.} and Gavrilova, {A. A.}",
note = "Publisher Copyright: {\textcopyright} 2020, Pleiades Publishing, Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2020",
month = apr,
day = "1",
doi = "10.1134/S1028334X20040091",
language = "English",
volume = "491",
pages = "235--237",
journal = "Doklady Earth Sciences",
issn = "1028-334X",
publisher = "МАИК {"}Наука/Интерпериодика{"}",
number = "2",

}

RIS

TY - JOUR

T1 - Isotope Fractionation and the Pressure Effect on 18O/16O in Kyanite-Sillimanite-Andalusite Polymorphs (Al2SiO5)

T2 - Ab-Initio Modelling

AU - Krylov, D. P.

AU - Kuznetsov, A. B.

AU - Gavrilova, A. A.

N1 - Publisher Copyright: © 2020, Pleiades Publishing, Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - Abstract: The β-factor dependences on temperature upon 18O/16O substitution have been originally deduced in andalusite, sillimanite and kyanite accounting for pressure effect: 1000lnβand(18O/16O) = 10.66466x – 0.19330x2 + 0.00282x3 + P(0.12748x – 0.00289x2) 1000lnβsil(18O/16O) = 10.51480x – 0.17485x2 + 0.001406x3 + P(0.12124x – 0.00286x2) 1000lnβky(18O/16O) = 10.14019x – 0.07573x2 + 0.00550x3 + P(0.09907x – 0.00206x2), x = 106/T2 (K)–2, P is pressure (GPa). The relations can be used in isotope geothermometry. Pressure produces an increase of the β-factors and consequently, δ18OAI2SiOS up to ≈0.5‰ in conditions of the “cold” subduction (at extremely low dT/dP gradients).

AB - Abstract: The β-factor dependences on temperature upon 18O/16O substitution have been originally deduced in andalusite, sillimanite and kyanite accounting for pressure effect: 1000lnβand(18O/16O) = 10.66466x – 0.19330x2 + 0.00282x3 + P(0.12748x – 0.00289x2) 1000lnβsil(18O/16O) = 10.51480x – 0.17485x2 + 0.001406x3 + P(0.12124x – 0.00286x2) 1000lnβky(18O/16O) = 10.14019x – 0.07573x2 + 0.00550x3 + P(0.09907x – 0.00206x2), x = 106/T2 (K)–2, P is pressure (GPa). The relations can be used in isotope geothermometry. Pressure produces an increase of the β-factors and consequently, δ18OAI2SiOS up to ≈0.5‰ in conditions of the “cold” subduction (at extremely low dT/dP gradients).

KW - AlSiO

KW - geothermometry

KW - β-factors

UR - http://www.scopus.com/inward/record.url?scp=85086452400&partnerID=8YFLogxK

U2 - 10.1134/S1028334X20040091

DO - 10.1134/S1028334X20040091

M3 - Article

AN - SCOPUS:85086452400

VL - 491

SP - 235

EP - 237

JO - Doklady Earth Sciences

JF - Doklady Earth Sciences

SN - 1028-334X

IS - 2

ER -

ID: 75949793