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Posted by / 07-Feb-2020 22:48

Electron spin resonance dating

Voinchet P, Despriée J, Tissoux H, Falguères C, Bahain JJ, Gageonnet R, Dépont J & Dolo JM (2010) ESR chronology of alluvial deposits and first human settlements of the Middle Loire Basin (Region Centre, France).

A new method of geologic age determination using electron spin resonance to measure trapped charge in minerals has been developed and tested.

These samples were taken from Unit I to Unit XVI representing at least 2.5 m of stratigraphic depth and approximately 90% of the infilling.

Many of the dated samples are burnt given that more than 85% of the faunal remains exhibit traces of fire exposure.

The conference will be followed by an optional 3-day field trip that will take participants to the south-east of South Australia for a palaeontological and geological themed visit to the World Heritage Naracoorte Caves fossil sites, the stranded Pleistocene beach ridges and UN Kanawinka Geopark and the world-famous Coonawarra and Limestone Coast wine regions.

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In order to better ascertain the chronological framework of the site, we dated several proxies.

Various speleothem samples were processed by U-series using a coupled induced plasma mass spectrometer (ICPMS-MC).

The radiometric results presented here are consistent and indicate a range from 350 to 183 ka, suggesting that a major part of the sedimentary infilling coinciding with the human occupation was contemporaneous with the MIS 9 to 7 time period. Allowing a website to create a cookie does not give that or any other site access to the rest of your computer, and only the site that created the cookie can read it.The reef tracts of Barbados have been investigated by electron spin resonance dating; all parameters necessary for ESR dating (including effective α-efficiency and thermal stability) were determined without cross checking with another independent dating method. The method has been tested by dating apatite crystals from Durango, Mexico.This sample shows two ESR absorption peaks which increase in intensity when the crystals are irradiated with gamma rays.

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