@article{1ff8debe49d24d539cdd3c7bcbbda645,
title = "Magnitude of σ1, σ2, and σ3 at mid-crustal levels in an orogenic belt: Microboudin method applied to an impure metachert from Turkey",
abstract = "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.",
keywords = "Exhumation, Metachert, Microboudin, Principal stresses, Tourmaline",
author = "Toshiaki Masuda and Shotaro Nakayama and Nozomi Kimura and Atsushi Okamoto",
note = "Funding Information: The authors thank Kumiko Onodera for the help in the field and Hideki Mori for the preparation of thin sections. We also thank Olivier Lacombe and an anonymous reviewer for constructive comments on the manuscript. This study was financially supported by the Japan Society for the Promotion of Science (16340152 awarded to TM). ",
year = "2008",
month = nov,
day = "15",
doi = "10.1016/j.tecto.2008.08.025",
language = "English",
volume = "460",
pages = "230--236",
journal = "Tectonophysics",
issn = "0040-1951",
publisher = "Elsevier",
number = "1-4",
}