High pressure and temperature fabric transitions in olivine and variations in upper mantle seismic anisotropy

Ohuchi, Tomohiro; Kawazoe, Takaaki; Nishihara, Yu; Nishiyama, Norimasa; Irifune, Tetsuo

doi:10.1016/j.epsl.2011.01.015

Cited by 100 publications

(92 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within these mechanisms, simultaneous activation of [100] and [001] slip direction induced by the presence of water can be the possible mechanism for producing the AG-type LPO in the peridotite samples from the Lindås Nappe complex. Two major factors are required for changing the slip direction of olivine from [100] to [001] -namely, water (Jung and Karato 2001a;Jung et al 2006) and pressure (Mainprice et al 2005;Jung et al 2009;Ohuchi et al 2011). Of these two factors, pressure is not applicable in this study.…”

Section: Lpo Of Olivinementioning

confidence: 93%

“…This pressure corresponds to a depth of approximately 90 km. Ohuchi et al (2011) also reported that the B-type LPO of olivine was formed at even higher pressures, about 7 GPa at T = 1,220°C and 1,400°C. However, for the anorthosite bodies in the Lindås Nappe complex surrounding the samples, the Grenvillian orogeny occurred at a pressure of 1 GPa and the Caledonian orogeny occurred at 1.5 to 2.1 GPa (Austrheim and Griffin 1985;Glodny et al 2008;Jamtveit et al 1990).…”

Section: Lpo Of Olivinementioning

confidence: 97%

See 1 more Smart Citation

Characterization of olivine fabrics and mylonite in the presence of fluid and implications for seismic anisotropy and shear localization

Jung

Austrheim

2014

Earth Planet Sp

View full text Add to dashboard Cite

The Lindås Nappe, Bergen Arc, is located in western Norway and displays two high-grade metamorphic structures. A Precambrian granulite facies foliation is transected by Caledonian fluid-induced eclogite-facies shear zones and pseudotachylytes. To understand how a superimposed tectonic event may influence olivine fabric and change seismic anisotropy, two lenses of spinel lherzolite were studied by scanning electron microscope (SEM) and electron back-scattered diffraction (EBSD) techniques. The granulite foliation of the surrounding anorthosite complex is displayed in ultramafic lenses as a modal variation in olivine, pyroxenes, and spinel, and the Caledonian eclogite-facies structure in the surrounding anorthosite gabbro is represented by thin (<1 cm) garnet-bearing ultramylonite zones. The olivine fabrics in the spinel bearing assemblage were E-type and B-type and a combination of A-and B-type lattice preferred orientations (LPOs). There was a change in olivine fabric from a combination of A-and B-type LPOs in the spinel bearing assemblage to B-and E-type LPOs in the garnet lherzolite mylonite zones. Fourier transform infrared (FTIR) spectroscopy analyses reveal that the water content of olivine in mylonite is much higher (approximately 600 ppm H/Si) than that in spinel lherzolite (approximately 350 ppm H/Si), indicating that water caused the difference in olivine fabric. Fabric strength of olivine gets weaker as the grain size reduced, and as a result, calculated seismic properties for the two deformation stages reveal that P-and S-velocity anisotropies are significantly weaker in the mylonite. Microtextures and LPO data indicate that the deformation mechanism changed from dominant dislocation creep in spinel lherzolite to dislocation creep accompanied by grain-boundary sliding in mylonite. Shear localization in the mylonite appears to be originated from the grain size reduction through (1) enhanced dynamic recrystallization of olivine in the presence of water and (2) Zener pinning of clinopyroxene or (3) by ultracomminution during the pseudotachylyte stage.

show abstract

Section: Lpo Of Olivinementioning

confidence: 93%

Section: Lpo Of Olivinementioning

confidence: 97%

Characterization of olivine fabrics and mylonite in the presence of fluid and implications for seismic anisotropy and shear localization

Jung

Austrheim

2014

Earth Planet Sp

View full text Add to dashboard Cite

show abstract

“…Therefore, various types of DAC with laser heating device have been developed at the HPXRD beamline. Taking advantage of the DACs, thermal expansion coefficient and pressure-volume-temperature diagram of cementitious materials could be obtained (Ohuchi et al 2011).…”

Section: Discussionmentioning

confidence: 99%

“…The application of the technique to cement and concrete research has many potential opportunities. HPXRD is a popular method in geophysics for testing mantle materials under extreme pressure and temperature conditions (Ohuchi et al 2011). Therefore, various types of DAC with laser heating device have been developed at the HPXRD beamline.…”

Section: Discussionmentioning

confidence: 99%

Advanced Nanoscale Characterization of Cement Based Materials Using X-Ray Synchrotron Radiation: A Review

Chae

Moon

Yoon

et al. 2013

Int J Concr Struct Mater

View full text Add to dashboard Cite

We report various synchrotron radiation laboratory based techniques used to characterize cement based materials in nanometer scale. High resolution X-ray transmission imaging combined with a rotational axis allows for rendering of samples in three dimensions revealing volumetric details. Scanning transmission X-ray microscope combines high spatial resolution imaging with high spectral resolution of the incident beam to reveal X-ray absorption near edge structure variations in the material nanostructure. Microdiffraction scans the surface of a sample to map its high order reflection or crystallographic variations with a micron-sized incident beam. High pressure X-ray diffraction measures compressibility of pure phase materials. Unique results of studies using the above tools are discussed-a study of pores, connectivity, and morphology of a 2,000 year old concrete using nanotomography; detection of localized and varying silicate chain depolymerization in Al-substituted tobermorite, and quantification of monosulfate distribution in tricalcium aluminate hydration using scanning transmission X-ray microscopy; detection and mapping of hydration products in high volume fly ash paste using microdiffraction; and determination of mechanical properties of various AFm phases using high pressure X-ray diffraction.

show abstract

“…1.8-7.3 2.2-5.5 Ohuchi et al (2011) (a) 6.1-8.6 3.9-5.6 Michibayashi et al (2012) (a) 2.7-5.9 2.5-5.0 Jung et al (2013) (a) 8. 8-8.9 5.3-5.7 Park et al (2014) (a)…”

Section: Introductionmentioning

confidence: 99%

Erratum to: Crystal preferred orientations of olivine, orthopyroxene, serpentine, chlorite, and amphibole, and implications for seismic anisotropy in subduction zones: a review

Jung

2018

Geosci J

View full text Add to dashboard Cite

There are errors in the article entitled "Crystal preferred orientations of olivine, orthopyroxene, serpentine, chlorite, and amphibole, and implications for seismic anisotropy in subduction zones: a review" by Haemyeong Jung, which appeared on pages 985-1011 of the December issue in 2017. The author has provided a corrected article which is attached at the end of this erratum. ABSTRACT:This study provides a comprehensive review of the crystal preferred orientation (CPO) of olivine and orthopyroxene in the upper mantle, and of several hydrous minerals in the mantle wedge and at the slab-mantle interface. It discusses the seismic anisotropy of those minerals. Water-induced CPOs of olivine produced by previous experimental studies under high pressure and temperature conditions were found in many natural rocks. It is emphasized that the strong CPOs of hydrous minerals such as serpentine, chlorite, and amphibole, play an important role in interpreting the anomalously strong seismic anisotropy observed in subduction zones.

show abstract

High pressure and temperature fabric transitions in olivine and variations in upper mantle seismic anisotropy

Cited by 100 publications

References 36 publications

Characterization of olivine fabrics and mylonite in the presence of fluid and implications for seismic anisotropy and shear localization

Characterization of olivine fabrics and mylonite in the presence of fluid and implications for seismic anisotropy and shear localization

Advanced Nanoscale Characterization of Cement Based Materials Using X-Ray Synchrotron Radiation: A Review

Erratum to: Crystal preferred orientations of olivine, orthopyroxene, serpentine, chlorite, and amphibole, and implications for seismic anisotropy in subduction zones: a review

Contact Info

Product

Resources

About