The potential of portable luminescence readers in geomorphological investigations: a review

Kennedy Munyikwa, Tim C. Kinnaird, David C.W. Sanderson

Research output: Contribution to journalJournal Articlepeer-review

17 Citations (Scopus)

Abstract

The development of functional portable optically stimulated luminescence (OSL) readers over the last decade has provided practitioners with the capability to acquire luminescence signals from geological materials relatively rapidly, which allows for expedient preliminary chronostratigraphic insight when working with complex depositional systems of late Quaternary age. Typically, when using the portable OSL reader, infrared (IR) or blue post-IR OSL signals are acquired from bulk unprocessed materials, in contrast to regular luminescence dating, which is usually based on measurements on pure quartz or feldspar mineral separates, or on select silt-sized polymineralic portions. To demonstrate the utility of portable OSL measurements, this paper outlines the basic features of portable OSL readers and their constraints. Subsequently, case studies in which the instrument has been used to elucidate cryptostratigraphic variations in sedimentary sequences for geomorphological applications are reviewed. The studies can generally be grouped into three main categories. The first includes studies where the variation of portable OSL reader luminescence signal intensities with depth are plotted to generate profiles that contextualize sediment stratigraphy. In the second group, portable OSL reader luminescence signal intensities are used to interpret sediment processes that shed light on depositional histories. In the last category, luminescence signals from the portable OSL reader are calibrated to approximate numerical burial ages of depositional units. The paper concludes with a discussion of possible future directions.

Original languageEnglish
Pages (from-to)131-150
Number of pages20
JournalEarth Surface Processes and Landforms
Volume46
Issue number1
DOIs
Publication statusPublished - Jan. 2021

Keywords

  • chronology
  • dating
  • geomorphology
  • landscape evolution
  • optically stimulated luminescence
  • portable OSL reader

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