Fabric transition with dislocation creep of a carbonate fault zone in the brittle regime

Sungshil Kim, Jin-Han Lee, Raehee Han, Nahyeon Kim, Haemyeong Jung

Research output: Contribution to journalArticle

Abstract

Fabric transition by a switch in the dominant slip system of minerals in the plastic regime can be induced by changes in temperature, strain rate, or water content. We propose here this fabric transition by frictional heating in seismogenic fault zones in the brittle regime. The Garam Thrust in the Taebaeksan Basin of South Korea has a hanging wall of Cambrian dolostone juxtaposed against a footwall of Ordovician limestone and records a minimum displacement of ~ 120 m. In a 10 cm thick plastically deformed layer adjacent to the principal slip layer of the fault zone, the lattice preferred orientation of calcite grains suggests that the dominant slip system changes, approaching the principal slip layer, from r 〈02–21〉 and e-twinning, through r 〈02–21〉 and basal 〈a〉 to basal 〈a〉. This fabric transition requires a high temperature-gradient of 40 °C/cm, which we infer to result from frictional heating of the seismic fault zone. We suggest that fabric transition within a thin plastically deformed layer adjacent to the principal slip layer of a fault zone indicates an unusually steep temperature gradient and provides strong evidence of seismic slip.

Original languageEnglish
Pages (from-to)107-116
Number of pages10
JournalTectonophysics
Volume723
DOIs
Publication statusPublished - 2018 Jan 16

Fingerprint

dislocation creep
fault zone
carbonates
slip
carbonate
temperature gradient
temperature gradients
South Korea
heating
twinning
dolostone
seismic zone
preferred orientation
limestone
hanging wall
footwall
calcite
strain rate
thrust
moisture content

Keywords

  • Fabric transition
  • Frictional heating
  • Garam thrust
  • Lattice preferred orientation
  • Seismic slip

ASJC Scopus subject areas

  • Geophysics
  • Earth-Surface Processes

Cite this

Fabric transition with dislocation creep of a carbonate fault zone in the brittle regime. / Kim, Sungshil; Lee, Jin-Han; Han, Raehee; Kim, Nahyeon; Jung, Haemyeong.

In: Tectonophysics, Vol. 723, 16.01.2018, p. 107-116.

Research output: Contribution to journalArticle

Kim, Sungshil ; Lee, Jin-Han ; Han, Raehee ; Kim, Nahyeon ; Jung, Haemyeong. / Fabric transition with dislocation creep of a carbonate fault zone in the brittle regime. In: Tectonophysics. 2018 ; Vol. 723. pp. 107-116.
@article{25cd808f1bdd4f41a5accff04cb06f55,
title = "Fabric transition with dislocation creep of a carbonate fault zone in the brittle regime",
abstract = "Fabric transition by a switch in the dominant slip system of minerals in the plastic regime can be induced by changes in temperature, strain rate, or water content. We propose here this fabric transition by frictional heating in seismogenic fault zones in the brittle regime. The Garam Thrust in the Taebaeksan Basin of South Korea has a hanging wall of Cambrian dolostone juxtaposed against a footwall of Ordovician limestone and records a minimum displacement of ~ 120 m. In a 10 cm thick plastically deformed layer adjacent to the principal slip layer of the fault zone, the lattice preferred orientation of calcite grains suggests that the dominant slip system changes, approaching the principal slip layer, from r 〈02–21〉 and e-twinning, through r 〈02–21〉 and basal 〈a〉 to basal 〈a〉. This fabric transition requires a high temperature-gradient of 40 °C/cm, which we infer to result from frictional heating of the seismic fault zone. We suggest that fabric transition within a thin plastically deformed layer adjacent to the principal slip layer of a fault zone indicates an unusually steep temperature gradient and provides strong evidence of seismic slip.",
keywords = "Fabric transition, Frictional heating, Garam thrust, Lattice preferred orientation, Seismic slip",
author = "Sungshil Kim and Jin-Han Lee and Raehee Han and Nahyeon Kim and Haemyeong Jung",
year = "2018",
month = "1",
day = "16",
doi = "10.1016/j.tecto.2017.12.008",
language = "English",
volume = "723",
pages = "107--116",
journal = "Tectonophysics",
issn = "0040-1951",
publisher = "Elsevier",

}

TY - JOUR

T1 - Fabric transition with dislocation creep of a carbonate fault zone in the brittle regime

AU - Kim, Sungshil

AU - Lee, Jin-Han

AU - Han, Raehee

AU - Kim, Nahyeon

AU - Jung, Haemyeong

PY - 2018/1/16

Y1 - 2018/1/16

N2 - Fabric transition by a switch in the dominant slip system of minerals in the plastic regime can be induced by changes in temperature, strain rate, or water content. We propose here this fabric transition by frictional heating in seismogenic fault zones in the brittle regime. The Garam Thrust in the Taebaeksan Basin of South Korea has a hanging wall of Cambrian dolostone juxtaposed against a footwall of Ordovician limestone and records a minimum displacement of ~ 120 m. In a 10 cm thick plastically deformed layer adjacent to the principal slip layer of the fault zone, the lattice preferred orientation of calcite grains suggests that the dominant slip system changes, approaching the principal slip layer, from r 〈02–21〉 and e-twinning, through r 〈02–21〉 and basal 〈a〉 to basal 〈a〉. This fabric transition requires a high temperature-gradient of 40 °C/cm, which we infer to result from frictional heating of the seismic fault zone. We suggest that fabric transition within a thin plastically deformed layer adjacent to the principal slip layer of a fault zone indicates an unusually steep temperature gradient and provides strong evidence of seismic slip.

AB - Fabric transition by a switch in the dominant slip system of minerals in the plastic regime can be induced by changes in temperature, strain rate, or water content. We propose here this fabric transition by frictional heating in seismogenic fault zones in the brittle regime. The Garam Thrust in the Taebaeksan Basin of South Korea has a hanging wall of Cambrian dolostone juxtaposed against a footwall of Ordovician limestone and records a minimum displacement of ~ 120 m. In a 10 cm thick plastically deformed layer adjacent to the principal slip layer of the fault zone, the lattice preferred orientation of calcite grains suggests that the dominant slip system changes, approaching the principal slip layer, from r 〈02–21〉 and e-twinning, through r 〈02–21〉 and basal 〈a〉 to basal 〈a〉. This fabric transition requires a high temperature-gradient of 40 °C/cm, which we infer to result from frictional heating of the seismic fault zone. We suggest that fabric transition within a thin plastically deformed layer adjacent to the principal slip layer of a fault zone indicates an unusually steep temperature gradient and provides strong evidence of seismic slip.

KW - Fabric transition

KW - Frictional heating

KW - Garam thrust

KW - Lattice preferred orientation

KW - Seismic slip

UR - http://www.scopus.com/inward/record.url?scp=85038364387&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85038364387&partnerID=8YFLogxK

U2 - 10.1016/j.tecto.2017.12.008

DO - 10.1016/j.tecto.2017.12.008

M3 - Article

VL - 723

SP - 107

EP - 116

JO - Tectonophysics

JF - Tectonophysics

SN - 0040-1951

ER -