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01.01.2016

Age dating contamination




en.wikipedia.org/wiki/Radiometric_dating

This can reduce the problem of contamination. In uranium–lead dating, the concordia diagram is used which also decreases the problem of nuclide loss. Finally, correlation between different isotopic dating methods may be required to confirm the age of a sample. For example, the age of the Amitsoq gneisses from western ...

en.wikipedia.org/wiki/Radiocarbon_dating

Radiocarbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon ( 14. C), a radioactive isotope of carbon. The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists.

www.radiocarbon.com/carbon-dating-pretreatment.htm

In general, infinite-age contamination can make a sample considerably older while modern contamination can make the sample significantly younger than its true age. Regardless of the carbon dating methodology employed, be it radiometric dating or the accelerator mass spectrometry (AMS) method, a process must be ...

www.c14dating.com/pret.html

Libby realized that the residual carbon 14 of some samples would be thus affected and suggested that some materials would be more accurate for dating than others. He predicted that .... Table 1: The effect of contamination by old and modern carbon upon a sample with a 'true age' of 900 BP. Figures in brackets give the ...

pubs.usgs.gov/fs/FS-134-99

Feb 18, 2014 ... Information about the age of ground water can be used to define recharge rates, refine hydrologic models of ground-water systems, predict contamination potential, and estimate the time needed to flush contaminants from ground-water systems. CFCs also can be used to trace seepage from rivers into ...

answersingenesis.org/geology/radiometric-dating/radiometric-dating-problems-with-the-assumptions

Aug 4, 2010 ... Once you understand the basic science of radiometric dating, you can see how wrong assumptions lead to incorrect dates. ... Because of such contamination, the less than 50-year-old lava flows at Mt. Ngauruhoe, New Zealand (Figure 4), yield a rubidium-strontium “age” of 133 million years, ...

www.exponent.com/knowledge/alerts/2016/04/age-dating-chemical-contamination/~/media/3c3d879e8b724824b93df7503573ee99.ashx

Determining when environmental contamination occurred is a central question in many environmental and toxic tort cases and in insurance claims. Environmental forensic scientists are often asked to determine the age and/or release date of contaminants found in groundwater, soils, and sediments. Chemical contaminant  ...

journals.uair.arizona.edu/index.php/radiocarbon/article/viewFile/3523/3038

ABSTRACT. The study of the radiocarbon age of bone bioapatite was initiated by necessity to date archaeological artifacts, which often contain little or no collagen as a result of poor preservation. Contamination of the organic fraction in the process of the burial or during museum preservation treatment generally prohibits ...

journals.uair.arizona.edu/index.php/radiocarbon/article/download/1506/1510

Some of our gyttja samples yielded an age 0.2-0.6 ka 14C years too old due to hardwater effect. We also found an aging effect in several bulk samples with a high admixture of siliciclastic material; this is attributed to fluvial input of reworked , older organic debris. Rejuvenation of bulk material as a result of root contamination ...


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