Surface exposure dating of non-terrestrial bodies using optically stimulated luminescence: A new method

Sohbati, Reza; Jain, Mayank; Murray, Andrew

doi:10.1016/j.icarus.2012.07.017

Cited by 37 publications

(56 citation statements)

References 48 publications

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“…Freiesleben et al (2015) have further developed the model of Sohbati et al (2012d) to include multiple sequential exposure and burial events in a unified equation in which the parameters have physical meaning (in contrast to simple mathematical parametrization, e.g. Laskaris and Liritzis, 2011).…”

Section: Was the Cobble Surface Bleached?mentioning

confidence: 99%

Age of a prehistoric “Rodedian” cult site constrained by sediment and rock surface luminescence dating techniques

Sohbati

Murray

Porat

et al. 2015

Quaternary Geochronology

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Section: Was the Cobble Surface Bleached?mentioning

confidence: 99%

Age of a prehistoric “Rodedian” cult site constrained by sediment and rock surface luminescence dating techniques

Sohbati

Murray

Porat

et al. 2015

Quaternary Geochronology

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“…We therefore interpret the exposure age in terms of the timing of a penultimate rockfall, which first uncovered the rock surface about 700 y before the most recent rockfall at A.D. ∼1100. The uncertainty in this exposure duration result only expresses model fit and analytical error, but it confidently indicates the pigmented rock surface was subject to several centuries of sunlight exposure in the alcove, whereas exposure for over a millennium is very improbable by our analysis in Sohbati et al (17). Those several centuries before the rockfall represent the window of time, A.D. ∼400-1100 strictly, but A.D. ∼1-1100 more conservatively, when it was possible for the Great Gallery figures to be painted (Fig.…”

Section: Resultsmentioning

confidence: 66%

“…The stimulation and release of trapped charge by sunlight that resets luminescence signals happens at the surface of rocks as well as sediment. Recent work takes advantage of how this "bleaching" of rock penetrates through time into the subsurface up to a few centimenters (16,17). The luminescence signal within the core of rocks is saturated over geologic time due to ionization from local radioactivity.…”

Section: Resultsmentioning

confidence: 99%

“…S6. Briefly, exposure time is calculated through fitting to a modeled, nested-exponential function incorporating the opacity of the rock and the local daylight spectrum and calibrated with a sample of known exposure duration (17). We have applied this technique to part of the sample of the buried, unprepared surface of the …”

Section: Resultsmentioning

confidence: 99%

“…Among the latest applications of OSL are techniques dating the outer surfaces of rock clasts that have become shielded from light, including those with archaeological context (12)(13)(14)(15). Recent work has furthermore used the "bleaching" profile of decreasing luminescence signal toward the surface of rock to estimate exposure time to sunlight (16,17). Using these dating tools, we can constrain the age of rock art and gain new insight into past cultures and landscapes.…”

mentioning

confidence: 99%

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Age of Barrier Canyon-style rock art constrained by cross-cutting relations and luminescence dating techniques

Pederson¹,

Chapot

Simms

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

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Rock art compels interest from both researchers and a broader public, inspiring many hypotheses about its cultural origin and meaning, but it is notoriously difficult to date numerically. Barrier Canyon-style (BCS) pictographs of the Colorado Plateau are among the most debated examples; hypotheses about its age span the entire Holocene epoch and previous attempts at direct radiocarbon dating have failed. We provide multiple age constraints through the use of cross-cutting relations and new and broadly applicable approaches in optically stimulated luminescence dating at the Great Gallery panel, the type section of BCS art in Canyonlands National Park, southeastern Utah. Alluvial chronostratigraphy constrains the burial and exhumation of the alcove containing the panel, and limits are also set by our related research dating both a rockfall that removed some figures and the rock's exposure duration before that time. Results provide a maximum possible age, a minimum age, and an exposure time window for the creation of the Great Gallery panel, respectively. The only prior hypothesis not disproven is a late Archaic origin for BCS rock art, although our age result of A.D. ∼1-1100 coincides better with the transition to and rise of the subsequent Fremont culture. This chronology is for the type locality only, and variability in the age of other sites is likely. Nevertheless, results suggest that BCS rock art represents an artistic tradition that spanned cultures and the transition from foraging to farming in the region.

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On extracting sediment transport information from measurements of luminescence in river sediment

et al. 2017

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Accurately quantifying sediment transport rates in rivers remains an important goal for geomorphologists, hydraulic engineers, and environmental scientists. However, current techniques for measuring long‐time scale (102–106 years) transport rates are laborious, and formulae to predict transport are notoriously inaccurate. Here we attempt to estimate sediment transport rates by using luminescence, a property of common sedimentary minerals that is used by the geoscience community for geochronology. This method is advantageous because of the ease of measurement on ubiquitous quartz and feldspar sand. We develop a model from first principles by using conservation of energy and sediment mass to explain the downstream pattern of luminescence in river channel sediment. We show that the model can accurately reproduce the luminescence observed in previously published field measurements from two rivers with very different sediment transport styles. The model demonstrates that the downstream pattern of river sand luminescence should show exponential‐like decay in the headwaters which asymptotes to a constant value with further downstream distance. The parameters from the model can then be used to estimate the time‐averaged virtual velocity, characteristic transport lengthscale, storage time scale, and floodplain exchange rate of fine sand‐sized sediment in a fluvial system. The sediment transport values predicted from the luminescence method show a broader range than those reported in the literature, but the results are nonetheless encouraging and suggest that luminescence demonstrates potential as a sediment transport indicator. However, caution is warranted when applying the model as the complex nature of sediment transport can sometimes invalidate underlying simplifications.

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Surface exposure dating of non-terrestrial bodies using optically stimulated luminescence: A new method

Cited by 37 publications

References 48 publications

Age of a prehistoric “Rodedian” cult site constrained by sediment and rock surface luminescence dating techniques

Age of a prehistoric “Rodedian” cult site constrained by sediment and rock surface luminescence dating techniques

Age of Barrier Canyon-style rock art constrained by cross-cutting relations and luminescence dating techniques

On extracting sediment transport information from measurements of luminescence in river sediment

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