Microlite orientation in obsidian flow measured by synchrotron X-ray diffraction
Journal Article
·
· Contributions to Mineralogy and Petrology
- Univ. of California, Berkeley, CA (United States). Dept. of Earth and Planetary Science
- Univ. of California, Berkeley, CA (United States). Earth and Environmental Sciences Area
Clinopyroxene and plagioclase (andesine) microlites in an obsidian flow from Glass Mountain (NE California, USA) display strong alignment. Synchrotron X-ray diffraction, coupled with Rietveld analysis, was used to quantify crystallographic-preferred orientation (CPO). Clinopyroxene, with a rod-shaped morphology, shows a strong alignment of [001] in the flow direction and (010) aligned parallel to the inferred flow plane. Andesine, with a platy morphology, displays an alignment of (010) platelets in the flow plane. Some pole densities exceed 90 multiples of random distribution. Applying a model of rigid ellipsoidal inclusions in a viscous matrix, the local pure shear strains are between 2 and 3.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- National Science Foundation (NSF)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1561893
- Journal Information:
- Contributions to Mineralogy and Petrology, Vol. 173, Issue 7; ISSN 0010-7999
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 5 works
Citation information provided by
Web of Science
Web of Science
Similar Records
Ascent and emplacement dynamics of obsidian lavas inferred from microlite textures
Timescales of spherulite crystallization in obsidian inferred from water concentration profiles
Slate – A new record for crystal preferred orientation
Journal Article
·
Wed Sep 16 00:00:00 EDT 2015
· Journal of Volcanology
·
OSTI ID:1561893
+1 more
Timescales of spherulite crystallization in obsidian inferred from water concentration profiles
Journal Article
·
Wed Jun 25 00:00:00 EDT 2008
· American Mineralogist
·
OSTI ID:1561893
+3 more
Slate – A new record for crystal preferred orientation
Journal Article
·
Sat Dec 16 00:00:00 EST 2017
· Journal of Structural Geology
·
OSTI ID:1561893