Water distribution in dynamically recrystallized quartz grains: Cathodoluminescence and micro-infrared spectroscopic mapping

Jun Muto, Hiroyuki Nagahama, Tetsuo Hashimoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The distribution of water in dynamically recrystallized quartz aggregates in granitic mylonites was investigated by cathodoluminescence (CL) observations and micro-infrared (IR) spectroscopic mapping. It is clear from CL observations and micro-IR spectroscopic mappings that the CL intensity and contrast depend on the density of defects (e.g. the content of molecular H2O and absorbed OH species). Dynamic recrystallization, as a recovery process of intracrystalline strain, decreases the densities of excess carriers originated from defects. The decrease in the densities of excess carriers decreases the CL intensity and contrast within each grain. To investigate the effect of water weakening in the rheological properties of the crust, CL spectroscopy and micro-IR spectroscopic mapping are essential in the determination of concentration and distribution of water in natural high-strain zones.

Original languageEnglish
Pages (from-to)397-407
Number of pages11
JournalGeological Society Special Publication
Volume245
DOIs
Publication statusPublished - 2005 Sep 19

ASJC Scopus subject areas

  • Water Science and Technology
  • Ocean Engineering
  • Geology

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