气候变化领域集成服务门户(CCPortal): A Subgrain-Size Piezometer Calibrated for EBSD

CCPortal

DOI	10.1029/2020GL090056
	A Subgrain-Size Piezometer Calibrated for EBSD
	Goddard R.M.; Hansen L.N.; Wallis D.; Stipp M.; Holyoke C.W.; III; Kumamoto K.M.; Kohlstedt D.L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	We calibrate a subgrain-size piezometer using electron backscatter diffraction (EBSD) data collected from experimentally deformed samples of olivine and quartz. Systematic analyses of angular and spatial resolution test the suitability of each data set for inclusion in calibration of the subgrain-size piezometer. To identify subgrain boundaries, we consider a range of critical misorientation angles and conclude that a 1° threshold provides the optimal piezometric calibration. The mean line-intercept length, equivalent to the subgrain-size, is found to be inversely proportional to the von Mises equivalent stress for data sets both with and without the correction of Holyoke and Kronenberg (2010, https://doi.org/10.1016/j.tecto.2010.08.001). These new piezometers provide stress estimates from EBSD analyses of polymineralic rocks without the need to discriminate between relict and recrystallized grains and therefore greatly increase the range of rocks that may be used to constrain geodynamic models. © 2020. The Authors.
英文关键词	Silicate minerals; Statistical tests; Electron back scatter diffraction; Misorientation angle; Polymineralic rocks; Recrystallized grains; Spatial resolution; Subgrain boundaries; Systematic analysis; Von Mises equivalent stress; Calibration; backscatter; calibration; diffraction; electron; grain size; inclusion; olivine; piezometer; rock mechanics; spatial resolution
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169364
作者单位	Department of Earth Sciences, University of Oxford, Oxford, United Kingdom; Department of Earth and Environmental Sciences, University of Minnesota, Twin Cities, Minneapolis, MN, United States; Department of Earth Sciences, Utrecht University, Utrecht, Netherlands; Department of Earth Sciences, University of Cambridge, Cambridge, United Kingdom; Department of Geosciences and Geography, University of Halle, Halle (Saale), Germany; Department of Geosciences, University of Akron, Akron, OH, United States
推荐引用方式 GB/T 7714	Goddard R.M.,Hansen L.N.,Wallis D.,et al. A Subgrain-Size Piezometer Calibrated for EBSD[J],2020,47(23).
APA	Goddard R.M..,Hansen L.N..,Wallis D..,Stipp M..,Holyoke C.W..,...&Kohlstedt D.L..(2020).A Subgrain-Size Piezometer Calibrated for EBSD.Geophysical Research Letters,47(23).
MLA	Goddard R.M.,et al."A Subgrain-Size Piezometer Calibrated for EBSD".Geophysical Research Letters 47.23(2020).