A study of cathodoluminescence and trace element compositional zoning in natural quartz from volcanic rocks

Mapping titanium content in quartz

William P. Leeman, Colin M. MacRae, Nick C. Wilson, Aaron Torpy, Cin Ty A Lee, James J. Student, Jay Thomas, Edward P. Vicenzi

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

This article concerns application of cathodoluminescence (CL) spectroscopy to volcanic quartz and its utility in assessing variation in trace quantities of Ti within individual crystals. CL spectroscopy provides useful details of intragrain compositional variability and structure but generally limited quantitative information on element abundances. Microbeam analysis can provide such information but is time-consuming and costly, particularly if large numbers of analyses are required. To maximize advantages of both approaches, natural and synthetic quartz crystals were studied using high-resolution hyperspectral CL imaging (1.2-5.0 eV range) combined with analysis via laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). Spectral intensities can be deconvolved into three principal contributions (1.93, 2.19, and 2.72 eV), for which intensity of the latter peak was found to correlate directly with Ti concentration. Quantitative maps of Ti variation can be produced by calibration of the CL spectral data against relatively few analytical points. Such maps provide useful information concerning intragrain zoning or heterogeneity of Ti contents with the sensitivity of LA-ICPMS analysis and spatial resolution of electron microprobe analysis.

Original languageEnglish (US)
Pages (from-to)1322-1341
Number of pages20
JournalMicroscopy and Microanalysis
Volume18
Issue number6
DOIs
StatePublished - Dec 2012
Externally publishedYes

Fingerprint

Volcanic rocks
Zoning
Cathodoluminescence
cathodoluminescence
Trace elements
trace elements
Quartz
volcanology
quartz
titanium
Titanium
rocks
Inductively coupled plasma mass spectrometry
inductively coupled plasma mass spectrometry
Laser ablation
laser ablation
Spectroscopy
Crystals
microbeams
Electron probe microanalysis

Keywords

  • cathodoluminescence
  • LA-ICPMS
  • quartz
  • titanium

ASJC Scopus subject areas

  • Instrumentation

Cite this

A study of cathodoluminescence and trace element compositional zoning in natural quartz from volcanic rocks : Mapping titanium content in quartz. / Leeman, William P.; MacRae, Colin M.; Wilson, Nick C.; Torpy, Aaron; Lee, Cin Ty A; Student, James J.; Thomas, Jay; Vicenzi, Edward P.

In: Microscopy and Microanalysis, Vol. 18, No. 6, 12.2012, p. 1322-1341.

Research output: Contribution to journalArticle

Leeman, William P. ; MacRae, Colin M. ; Wilson, Nick C. ; Torpy, Aaron ; Lee, Cin Ty A ; Student, James J. ; Thomas, Jay ; Vicenzi, Edward P. / A study of cathodoluminescence and trace element compositional zoning in natural quartz from volcanic rocks : Mapping titanium content in quartz. In: Microscopy and Microanalysis. 2012 ; Vol. 18, No. 6. pp. 1322-1341.
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