Electron Spin Resonance (ESR) Dating in Lacustrine Environments

Blackwell, Bonnie A.B.

doi:10.1007/0-306-47669-x_13

Cited by 5 publications

(20 citation statements)

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“…This discussion will focus on karst applications, illustrated where possible by karst examples. It omits other applications, although other recent reviews (e.g., Blackwell, 2001;Falguères, 2003) do discuss other applications.…”

Section: Principles Of Esr Analysismentioning

confidence: 99%

“…After zeroing, the signals can regrow if given more irradiation. (adapted from Blackwell, 2001). pressure or strain that builds up in faults can partially or fully reset some signals, as can the strain developed during comminution during an earthquake or grinding for sample preparation (Figure 3).…”

Section: Principles Of Esr Analysismentioning

confidence: 99%

“…The selection of added doses does affect the curve fitting statistics, and hence, the precision for A Σ for enamel (e.g., Lee et al, 1997), and presumably for other materials as well. In the ramping technique, only 3-4 aliquots are used, but one or two are used to calibrate the spectrometer with each set of measurements, and two or three are successively irradiated to ever higher added doses (Blackwell, 2001).…”

Section: Esr Analysismentioning

confidence: 99%

“…The standard ESR method (i.e., not isochrons) for tooth enamel has now been tested extensively against other dating methods for sites in the age range 30-300 ka (Blackwell, 2001, (e.g., Grün, 2002;Vanhaelewyn et al, 2000), q band tests indicate that, although the peak is complex, it grows uniformly and can be accurately measured by a simple peak height measurement without deconvolution (Skinner et al, 2000). Human dosimetry experiments (Blackwell, 2001, Table 1) have hinted at possible problems with interference, temperature sensitivity, and signals induced by grinding and UV light exposure. Several researchers have suggested complex preparation techniques to com-pensate for these problems (e.g., Onori et al, 2000), but their effect on teeth older than 10 ka must be minimal or the ESR ages would not agree with those from other dating methods.…”

Section: Hydroxyapatite (Hap) Vertebrate Fossilsmentioning

confidence: 99%

“…ESR can be used to date many materials that are commonly encountered at karst sites, as well as samples curated in museums, and new applications are constantly being added. ESR's importance in dating quaternary and Pliocene sites has now been well demonstrated in archaeological contexts where it has dramatically changed our understanding of human origins and cultures (e.g., references in Blackwell, 2001). Many of these applications were in caves or abris, but could equally well be applied to open-air sites where the research questions are similar.…”

Section: Introductionmentioning

confidence: 99%

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Electron Spin Resonance (ESR) Dating in Karst Environments

Blackwell

2006

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UDC 543.4:551.44, 902.035:551.44 Bonnie A. B. Blackwell: Electron Spin Resonance (ESR) Dating in Karst Environments Electron spin resonance (ESR) dating has been developed for many materials, including hydroxyapatite in enamel, bone, and some fish scales, aragonite and calcite in travertine, molluscs, and calcrete, and quartz from ash, which have many potential applications in karst settings. Although the complexity of the signals in some materials has hampered routine application, research is solving these problems to make the method even more widely applicable. when tested against other dating techniques, age agreement has usually been excellent. Generally, the most reliable applications seem to be tooth enamel, some mollusc species, calcite deposits, and quartz minerals. ESR dating uses signals resulting from trapped charges created by radiation in crystalline solids. Ages are calculated by comparing the accumulated dose in the dating sample with the internal and external radiation dose rates produced by natural radiation in and around the sample. For fossils and authigenic minerals, no zeroing is necessary to obtain accurate ages. In sediment which contains reworked mineral clasts, ESR can be used to date the age of the mineral grain itself if it was not zeroed during erosion. For dating the sedimentation age, however, ESR signals must have been zeroed in order to give the correct age. High pressure, heating, and in some minerals, light exposure and grinding can zero an ESR signal, but some like hydroxyapatite have very high stability at surface temperatures. For materials that absorb uranium (U) during their burial history, such as teeth, bones, or mollusc shells, the age calculation considers their U uptake by cross calibrating with U series or U/Pb dating or by assuming different uptake models. Some difficulties in calculating the external dose rate can be overcome by applying the ESR isochron method, in which the sample acts as its own dosimeter. In open-air karst environments, changes in Izvleček UDK 543.4:551.44, 902.035:551.44 Bonnie A. B. Blackwell: Določanje starosti v krasu s pomočjo elektronske spinske resonance (ESR) Metoda ugotavljanja starosti s pomočjo elektronske spinske resonance (ESR), je bila razvita za najrazličnejše gradivo in snovi, vključno hidroksiapatit, emajl, kost, ribjo lusko, aragonit in kalcit v lehnjaku, školjčnih lupinah in kalcitnih skorjah, kremen v pepelu, kar vse nudi široke možnosti za uporabo v kraškem okolju. čeprav pestrost signalov v nekaterem gradivu ovira vsestransko uporabnost, raziskave rešujejo te težavein tako je ta metoda še bolj vsestransko uporabna. Ob primerjanju z drugimi tehnikami datacije, je ujemanje v starosti običajno odlično. Na splošno je ta metoda najbolj zanesljiva, če se uporablja za zobno sklenino, nekatere vrste školjk, odkladnine kalcita in minerale kremena. ESR metoda izkorišča za datiranje signale, ki so posledica napetosti, ki jih ustvarja sevanje v kristalih. Starost se preračuna s pomočjo primerjave ohranjene količine sevanja v vzorcu za da...

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Section: Principles Of Esr Analysismentioning

confidence: 99%

Section: Principles Of Esr Analysismentioning

confidence: 99%

Section: Esr Analysismentioning

confidence: 99%

Section: Hydroxyapatite (Hap) Vertebrate Fossilsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electron Spin Resonance (ESR) Dating in Karst Environments

Blackwell

2006

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Quaternary Environmental and Climatic Changes in Egypt: Proxies from Sedimentary Records

El-Asmar

2023

Advances in Science, Technology &Amp; Innovation

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ESR in the 21st century: From buried valleys and deserts to the deep ocean and tectonic uplift

Blackwell

Skinner

Blickstein

et al. 2016

Earth-Science Reviews

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Electron spin resonance (ESR) dating can date many materials, including hydroxyapatite in enamel and some fish scales, aragonite and calcite in corals, molluscs, some travertine and calcrete, and quartz from ash, fluvial deposits, and some flint. Dating studies using these materials have numerous potential applications in many varied Quaternary settings. ESR dating uses signals resulting from trapped charges created by radiation in crystalline solids. Ages are calculated by comparing the accumulated radiation dose in the dating sample with the internal and external radiation dose rates produced by natural radiation in and around the sample and produced by cosmic radiation. When compared to other dating techniques, age agreement has been excellent for teeth, corals, molluscs, and quartz. Recent improvements have included using a more complex modelling technique to calculate the cosmic dose rates and more detailed modelling techniques for dealing with variable external dose rates. Methods in development include using quartz from buried fluvial valleys to date geomorphic surfaces and using the signals in barnacles and benthic foraminifera for dating fossils or their associated sediment. New chronometer applications recently developed include using coral and mollusc dates to build sealevel curves and to monitor volcanic activity and tectonic uplift, using tooth and mollusc dates to assess water availability in deserts, and using isochron data to assess U uptake processes into teeth. When coupled with other geochemical and geomorphological techniques, ESR can provide the chronometric control to build paleoclimatic and other paleoenvironmental records. Many other applications are possible, from heating studies for artefacts to dating sulphates and other minerals on distant planets.

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Electron Spin Resonance (ESR) Dating in Lacustrine Environments

Cited by 5 publications

References 559 publications

Electron Spin Resonance (ESR) Dating in Karst Environments

Electron Spin Resonance (ESR) Dating in Karst Environments

Quaternary Environmental and Climatic Changes in Egypt: Proxies from Sedimentary Records

ESR in the 21st century: From buried valleys and deserts to the deep ocean and tectonic uplift

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