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Luminescence dating of K-feldspar from sediments: a protocol without anomalous fading correction

Journal Article


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Abstract


  • A protocol for optical dating of potassium-rich feldspar (K-feldspar) is proposed. It utilizes the infrared stimulated luminescence (IRSL) signal measured by progressively increasing the stimulation temperature from 50 to 250 °C in step of 50 °C, so-called multi-elevated-temperature post-IR IRSL (MET-pIRIR) measurements. Negligible anomalous fading was observed for the MET-pIRIR signals obtained at 200 and 250 °C. This was supported by equivalent dose (De) measurements using the IRSL and MET-pIRIR signals. The De values increase progressively from 50 °C to 200 °C, but similar De values were obtained for the MET-pIRIR signal at 200 and 250 °C. Measurement of modern samples and bleached samples indicates that the MET-pIRIR signals have small residual doses less than 5 Gy equivalent to about 1–2 ka. We have tested the protocol using various sedimentary samples with different ages from different regions of China. The MET-pIR IRSL ages obtained at 200 and 250 °C are consistent with independent and/or quartz OSL ages.

UOW Authors


  •   Li, Bo
  •   Li, Sheng-Hua (external author)

Publication Date


  • 2011

Citation


  • Li, B. & Li, S. (2011). Luminescence dating of K-feldspar from sediments: a protocol without anomalous fading correction. Quaternary Geochronology, 6 (5), 468-479.

Scopus Eid


  • 2-s2.0-79961029264

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1262&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/263

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 468

End Page


  • 479

Volume


  • 6

Issue


  • 5

Place Of Publication


  • Netherlands

Abstract


  • A protocol for optical dating of potassium-rich feldspar (K-feldspar) is proposed. It utilizes the infrared stimulated luminescence (IRSL) signal measured by progressively increasing the stimulation temperature from 50 to 250 °C in step of 50 °C, so-called multi-elevated-temperature post-IR IRSL (MET-pIRIR) measurements. Negligible anomalous fading was observed for the MET-pIRIR signals obtained at 200 and 250 °C. This was supported by equivalent dose (De) measurements using the IRSL and MET-pIRIR signals. The De values increase progressively from 50 °C to 200 °C, but similar De values were obtained for the MET-pIRIR signal at 200 and 250 °C. Measurement of modern samples and bleached samples indicates that the MET-pIRIR signals have small residual doses less than 5 Gy equivalent to about 1–2 ka. We have tested the protocol using various sedimentary samples with different ages from different regions of China. The MET-pIR IRSL ages obtained at 200 and 250 °C are consistent with independent and/or quartz OSL ages.

UOW Authors


  •   Li, Bo
  •   Li, Sheng-Hua (external author)

Publication Date


  • 2011

Citation


  • Li, B. & Li, S. (2011). Luminescence dating of K-feldspar from sediments: a protocol without anomalous fading correction. Quaternary Geochronology, 6 (5), 468-479.

Scopus Eid


  • 2-s2.0-79961029264

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1262&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/263

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 468

End Page


  • 479

Volume


  • 6

Issue


  • 5

Place Of Publication


  • Netherlands