Testing the use of feldspars for optical dating of hurricane overwash deposits

Davids, Femke; Duller, G.A.T.; Roberts, Helen M.

doi:10.1016/j.quageo.2009.03.001

Cited by 24 publications

(10 citation statements)

References 18 publications

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“…, ; Davids et al . ), some studies have suggested that corrections based on laboratory fading rates do not provide accurate age estimates (Wallinga et al . ; Li et al .…”

Section: Resultsmentioning

confidence: 99%

“…1, and, in contrast to the pIRIR290 data, it is also consistent with the prediction of laboratory fading measurements. Although published age comparisons using this signal have successfully made use of a fading rate observed in the laboratory to correct the ages (Huntley & Lamothe 2001;Buylaert et al 2007Buylaert et al , 2011bDavids et al 2010), some studies have suggested that corrections based on laboratory fading rates do not provide accurate age estimates Reimann et al 2011). Furthermore, reported that different SAR IR50 protocols yield fading rates that are different by~1%/decade (4.8%/decade vs. 3.5%/decade), but these protocols still yield very similar De values.…”

Section: Resultsmentioning

confidence: 99%

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A robust feldspar luminescence dating method for Middle and LatePleistocene sediments

Buylaert

Jain

Murray

et al. 2012

Boreas

641

470

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Luminescence dating is used extensively to provide absolute chronologies for Late Pleistocene sediments. Nowadays, most optical dates are based on quartz optically stimulated luminescence (OSL). However, the application of this signal is usually limited to the last ∼100 ka because of saturation of the quartz luminescence signal with dose. In contrast, the feldspar infrared stimulated luminescence (IRSL) dose–response curve grows to much higher doses; this has the potential to extend the datable age range by a factor of 4–5 compared with quartz OSL. However, it has been known for several decades that this IRSL signal is unstable, and this instability often gives rise to significant age underestimation. Here we test against independent age control the recently developed feldspar post‐IR IRSL approach to the dating of sediments, which appears to avoid signal instability. A physical model explaining our observations is discussed, and the method is shown to be accurate back to 600 ka. The post‐IR IRSL signal is reduced by exposure to daylight more slowly than that from quartz and low‐temperature IRSL, preventing its general application to young (e.g. Holocene) sediments. Nevertheless, this new approach is widely applicable (feldspar of appropriate luminescence behaviour is even more ubiquitous than quartz). These characteristics make this a method of great importance for the dating of Middle and Late Pleistocene deposits.

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“…, ; Davids et al . ), some studies have suggested that corrections based on laboratory fading rates do not provide accurate age estimates (Wallinga et al . ; Li et al .…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A robust feldspar luminescence dating method for Middle and LatePleistocene sediments

Buylaert

Jain

Murray

et al. 2012

Boreas

641

470

View full text Add to dashboard Cite

show abstract

“…For highly insensitive quartz samples, the origin and thermal stability of OSL signals are not clear and reliability is not assured. Age comparison studies for feldspar are less well developed; relationships to radiocarbon and quartz OSL ages suggest that fading corrections can work successfully (e.g., Davids et al 2010).…”

Section: Applicationsmentioning

confidence: 99%

Optically Stimulated Luminescence Dating of Sediments over the Past 200,000 Years

Rhodes

2011

Annu. Rev. Earth Planet. Sci.

390

224

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Optical dating of sediment using optically stimulated luminescence has become important for studying Earth surface processes, and this technique continues to develop rapidly. A group of closely linked luminescence methods can be used to estimate the time since grains of quartz and feldspar were last exposed to daylight by detecting their subsequent response to environmental ionizing radiation exposure. The technique is well suited to the dating of deposits as young as one year to several hundred thousand years. Recent technical developments have established a dating protocol with improved precision, a high degree of reliability, and an in-built means to detect incomplete signal removal during deposition. This approach has been extended to age estimation for single grains, opening up a wider range of potential environments and new possibilities for understanding postdepositional grain movement. Ongoing research offers the possibility of significant age range extension and novel applications including low-temperature thermochronology. 461

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“…Most luminescence studies based on feldspar have employed infrared (IR) stimulation at 50°C (here abbreviated IR@50°C) and detection in the blue spectrum (e.g. Auclair et al 2007;Wallinga et al 2007;Buylaert et al 2011;Davids et al 2010). However Thomsen et al (2008) concluded that the fading rate of these conventional IR signals is significantly higher than the fading rate of IR signals measured at an elevated stimulation temperature (e.g.…”

Section: Introductionmentioning

confidence: 99%

Luminescence dating of young coastal deposits from New Zealand using feldspar

Madsen

Buylaert²,

Murray

2011

Geochronometria

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Abstract:A new measurement protocol has been tested on K-feldspars from Whanganui Inlet and Parengarenga Harbour, New Zealand. A Single Aliquot Regenerative (SAR) dose protocol, using two successive infrared (IR) stimulations (post-IR IR SAR protocol) is setup for these young (<1000 years) coastal sediments. Significant anomalous fading (g 2days =7 %/decade) is observed using the conventional IR signal measured at 50°C. In contrast, the fading rate of the IR signal measured at elevated temperature (150°C) after the IR stimulation at 50°C (a post-IR IR signal) is not significant (g 2days ≤ 1 %/decade). Surprisingly low residual infrared stimulated luminescence (IRSL) signals were observed for a surface sample, suggesting that accurate ages as young as ~50 years can be obtained for these recent deposits. IRSL ages ranging between 48±6 years and 1050±50 years are obtained from six samples, indicating that sediment accumulation has occurred at the two sites during the last millennia, despite a falling trend in relative sea-level in Whanganui Inlet and a stable relative sealevel at Parengarenga Harbour.

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Testing the use of feldspars for optical dating of hurricane overwash deposits

Cited by 24 publications

References 18 publications

A robust feldspar luminescence dating method for Middle and LatePleistocene sediments

A robust feldspar luminescence dating method for Middle and LatePleistocene sediments

Optically Stimulated Luminescence Dating of Sediments over the Past 200,000 Years

Luminescence dating of young coastal deposits from New Zealand using feldspar

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