Magnitude of σ1, σ2, and σ3 at mid-crustal levels in an orogenic belt: Microboudin method applied to an impure metachert from Turkey

Toshiaki Masuda, Shotaro Nakayama, Nozomi Kimura, Atsushi Okamoto

研究成果: Article査読

8 被引用数 (Scopus)

抄録

We revised an equation for estimating palaeostress magnitude using the microboudin technique by incorporating the influence of time on the fracture strength of minerals. The equation was used to estimate triaxial palaeostresses from a rare sample of metachert from Turkey that contains microboudinaged, columnar tourmaline grains in a wide range of orientations within the foliation plane. The estimated principal palaeostresses are σ1 = 605 MPa, σ2 = 598 MPa, and σ3 = 597 MPa. As the microboudinage is considered to have occurred immediately before the rock encountered the brittle-plastic transition during exhumation, these stress values correspond to conditions at approximately 18 km depth and 300 °C within a Cretaceous orogenic belt.

本文言語English
ページ(範囲)230-236
ページ数7
ジャーナルTectonophysics
460
1-4
DOI
出版ステータスPublished - 2008 11月 15
外部発表はい

ASJC Scopus subject areas

  • 地球物理学
  • 地表過程

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