A comparison of multiple luminescence chronometers at Voordrag, South Africa

D. Colarossi*, G. A.T. Duller, H. M. Roberts, S. Tooth, G. A. Botha

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (SciVal)
156 Downloads (Pure)

Abstract

A suite of 10 samples collected from an 11 m thick colluvial sequence at Voordrag, KwaZulu-Natal, South Africa, have been used to undertake a comparison of different luminescence methods. Good agreement is found between single grain quartz optically stimulated luminescence (OSL) and single grain K-feldspar post-infrared infrared-stimulated luminescence (post-IR IRSL) ages, with the exception of the basal samples where the quartz OSL signal is saturated. Multiple grain quartz OSL consistently yields ages older than single grain OSL methods. Multiple grain feldspar ages derived from the IRSL50 signal are underestimated due to anomalous fading. A previously published radiocarbon chronology yields ages that are younger than those from single grain quartz OSL and post-IR IRSL, and this is most likely due to contamination with younger carbon. Identifying the effect of saturation on the quartz OSL signal remains challenging when quartz is dated in isolation. However, using a paired quartz/feldspar dating approach is an effective way of identifying the impact of saturation on the OSL signal.
Original languageEnglish
Article number101094
JournalQuaternary Geochronology
Volume60
Early online date28 May 2020
DOIs
Publication statusPublished - 01 Oct 2020

Keywords

  • K-feldspar post-IR IRSL
  • Multiple grains
  • Quartz OSL
  • Radiocarbon
  • Saturation
  • Single grains

Fingerprint

Dive into the research topics of 'A comparison of multiple luminescence chronometers at Voordrag, South Africa'. Together they form a unique fingerprint.

Cite this