Cooling rates in the shock veins of chondrites

Constraints on the (Mg, Fe)2SiO4 polymorph transformations

Ming Chen, Xiande Xie, A. El Goresy, B. Wopenka, Thomas Sharp

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The occurrence of γ-phase, a high-pressure polymorph of olivine (α-phase), in the shock veins of Sixiangkou chondrite was due to a greater cooling rate ( > 10 000°C ·-1) in the veins. Because γ-phase partially reverted to β-phase and no back-transformation from β-phase to α-phase took place, the shock veins of Peace River chondrite with a cooling rate of 1 000 - 2 000°C · s-1 contain a great amount of β-phase. In the shock veins of Mbale chondrite with a cooling rate of <500°C · s-1, the majority of γ-phase reverted to α-phase. The heat dissipation in shock veins took place after a stage of shock compression of chondrite parent body, and the parent body was broken into fragmental pieces. Cooling rate in the shock veins constrained the back-transformations of (Mg, Fe)2SiO4 high-pressure polymorphs.

Original languageEnglish (US)
Pages (from-to)526-528
Number of pages3
JournalScience in China, Series D: Earth Sciences
Volume41
Issue number5
StatePublished - 1998

Fingerprint

chondrite
cooling
parent body
dissipation
olivine
compression
rate
river

Keywords

  • (Mg, Fe)SiO
  • Chondrite
  • Cooling rate
  • Polymorph transformation
  • Shock vein

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Cooling rates in the shock veins of chondrites : Constraints on the (Mg, Fe)2SiO4 polymorph transformations. / Chen, Ming; Xie, Xiande; El Goresy, A.; Wopenka, B.; Sharp, Thomas.

In: Science in China, Series D: Earth Sciences, Vol. 41, No. 5, 1998, p. 526-528.

Research output: Contribution to journalArticle

@article{735c611554c44853a814dd0a85eed18a,
title = "Cooling rates in the shock veins of chondrites: Constraints on the (Mg, Fe)2SiO4 polymorph transformations",
abstract = "The occurrence of γ-phase, a high-pressure polymorph of olivine (α-phase), in the shock veins of Sixiangkou chondrite was due to a greater cooling rate ( > 10 000°C ·-1) in the veins. Because γ-phase partially reverted to β-phase and no back-transformation from β-phase to α-phase took place, the shock veins of Peace River chondrite with a cooling rate of 1 000 - 2 000°C · s-1 contain a great amount of β-phase. In the shock veins of Mbale chondrite with a cooling rate of <500°C · s-1, the majority of γ-phase reverted to α-phase. The heat dissipation in shock veins took place after a stage of shock compression of chondrite parent body, and the parent body was broken into fragmental pieces. Cooling rate in the shock veins constrained the back-transformations of (Mg, Fe)2SiO4 high-pressure polymorphs.",
keywords = "(Mg, Fe)SiO, Chondrite, Cooling rate, Polymorph transformation, Shock vein",
author = "Ming Chen and Xiande Xie and {El Goresy}, A. and B. Wopenka and Thomas Sharp",
year = "1998",
language = "English (US)",
volume = "41",
pages = "526--528",
journal = "Science in China, Series D: Earth Sciences",
issn = "1006-9313",
publisher = "Science in China Press",
number = "5",

}

TY - JOUR

T1 - Cooling rates in the shock veins of chondrites

T2 - Constraints on the (Mg, Fe)2SiO4 polymorph transformations

AU - Chen, Ming

AU - Xie, Xiande

AU - El Goresy, A.

AU - Wopenka, B.

AU - Sharp, Thomas

PY - 1998

Y1 - 1998

N2 - The occurrence of γ-phase, a high-pressure polymorph of olivine (α-phase), in the shock veins of Sixiangkou chondrite was due to a greater cooling rate ( > 10 000°C ·-1) in the veins. Because γ-phase partially reverted to β-phase and no back-transformation from β-phase to α-phase took place, the shock veins of Peace River chondrite with a cooling rate of 1 000 - 2 000°C · s-1 contain a great amount of β-phase. In the shock veins of Mbale chondrite with a cooling rate of <500°C · s-1, the majority of γ-phase reverted to α-phase. The heat dissipation in shock veins took place after a stage of shock compression of chondrite parent body, and the parent body was broken into fragmental pieces. Cooling rate in the shock veins constrained the back-transformations of (Mg, Fe)2SiO4 high-pressure polymorphs.

AB - The occurrence of γ-phase, a high-pressure polymorph of olivine (α-phase), in the shock veins of Sixiangkou chondrite was due to a greater cooling rate ( > 10 000°C ·-1) in the veins. Because γ-phase partially reverted to β-phase and no back-transformation from β-phase to α-phase took place, the shock veins of Peace River chondrite with a cooling rate of 1 000 - 2 000°C · s-1 contain a great amount of β-phase. In the shock veins of Mbale chondrite with a cooling rate of <500°C · s-1, the majority of γ-phase reverted to α-phase. The heat dissipation in shock veins took place after a stage of shock compression of chondrite parent body, and the parent body was broken into fragmental pieces. Cooling rate in the shock veins constrained the back-transformations of (Mg, Fe)2SiO4 high-pressure polymorphs.

KW - (Mg, Fe)SiO

KW - Chondrite

KW - Cooling rate

KW - Polymorph transformation

KW - Shock vein

UR - http://www.scopus.com/inward/record.url?scp=0032466749&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032466749&partnerID=8YFLogxK

M3 - Article

VL - 41

SP - 526

EP - 528

JO - Science in China, Series D: Earth Sciences

JF - Science in China, Series D: Earth Sciences

SN - 1006-9313

IS - 5

ER -