start-ver=1.4
cd-journal=joma
no-vol=147
cd-vols=
no-issue=4
article-no=
start-page=505
end-page=509
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2004
dt-pub=200406
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Phase transition of zircon at high P-T conditions
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In situ observations of the zircon-reidite transition in ZrSiO4 were carried out using a
multianvil high-pressure apparatus and synchrotron radiation. The phase boundary between zircon and reidite was determined to be P (GPa) = 8.5 + 0.0017×(T-1200) (K) for temperatures between 1100-1900 K. When subducted slabs, including igneous rocks and sediments, descend into the upper mantle, zircon in the subducted slab transforms into reidite at pressures of about 9 GPa, corresponding to a depth of 270 km. Reidite found in an upper Eocene impact ejecta layer in marine sediments is thought to have been transformed from zircon by a shock event. The peak pressure generated by the shock event in this occurrence is estimated to be higher than 8 GPa.
en-copyright=
kn-copyright=

en-aut-name=OnoShigeaki
en-aut-sei=Ono
en-aut-mei=Shigeaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=FunakoshiKenichi
en-aut-sei=Funakoshi
en-aut-mei=Kenichi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NakajimaYoichi
en-aut-sei=Nakajima
en-aut-mei=Yoichi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=TangeYoshinori
en-aut-sei=Tange
en-aut-mei=Yoshinori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=KatsuraTomoo
en-aut-sei=Katsura
en-aut-mei=Tomoo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

affil-num=1
en-affil=
kn-affil=Institute for Frontier Research on Earth Evolution, Japan Marine Science & Technology Center

affil-num=2
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute

affil-num=3
en-affil=
kn-affil=Department of Earth and Planetary Sciences, Tokyo Institute of Technology

affil-num=4
en-affil=
kn-affil=Department of Earth and Planetary Sciences, Tokyo Institute of Technology

affil-num=5
en-affil=
kn-affil=Institute for Study of the Earth's Interior, Okayama University
en-keyword=high-pressure phase
kn-keyword=high-pressure phase
en-keyword=kokchetav massif
kn-keyword=kokchetav massif
en-keyword=northern KAZAKSTAN; METAMORPHIC ROCKS; ZRSIO4; TRANSFORMATIONS; POLYMORPH; REIDITE; STATE; GPA
kn-keyword=northern KAZAKSTAN; METAMORPHIC ROCKS; ZRSIO4; TRANSFORMATIONS; POLYMORPH; REIDITE; STATE; GPA
END