Radiometric dating methods

TABLE 13 Radiometric Methods of Dating Used in Archaeology ... 

The Th/ Th and Pa/ Th methods were the first radiometric methods to be used for dating of manganese nodules but their application was limited because of the short half lives of Th and Pa. In spite of the limitation of working with samples from the uppermost 1-2 mm of the sample, high resolution studies of nodules have been achieved using this method. For example, Eisenhaueret al. (1992) analyzed 69 samples to a depth of 1.4 mm with a resolution of 0.02 nun in the VA 13/2 Mn crast sample (see section... 

The Relationship between Balancing Reactions and Reaction Lifetimes A Consideration of the Potassium-Argon Radiometric Method for Dating Minerals, W. A. YiovrsxA, Journal of Chemical Education, 82(7), 1094—1098 (2005). 

Therefore, in order to eliminate these error sources, sample preparation procedures have been improved upon since the beginning of radiometric method dating. Most of these preparations consist of mechanical pre-treatment and chemical treatment (Sorminen Jungner, 2001 Lindroos et al., 2007 Nawrocka et al., 2007 Goslar et al., 2009 Nawrocka et al., 2009 Heinemeier et al., 2010). 

Radiometric dating is one way to get age information. What are some of the other ways of measuring time How do radiochronometers complement these methods ... 

Nakhla, S. M., Delibrias, G., Radiometric Dating Methods Low Level... 

Radiometric dating As radioisotopes have a given half-life they can be used to calculate or date a sample. Referred to as radiometric dating (including carbon dating), it is possible on the basis of a measure of half-life of an isotope in a sample to determine its age or how long it has existed. Radiocarbon dating was discovered in 1949 by the American chemist, Willard Frank Libby, who was awarded the Nobel Prize in Chemistry in 1960 /or his method to use carbon-14 for age determination . 

Table 22.5 Burial rates of nitrogen Rates were calculated using several methods, assuming accretion has kept up with relative sea level rise (SLR), a budget of organic matter inputs and losses (OM budget), mass accretion rates using radiometric dating techniques ( Cs or Pb), or net particulate nitrogen (net PN) budgets to the marsh or in tidal creeks. GSW stands for Great Sippewissett Marsh...

Traditionally foram records have not been datable by radiometric means (Delaney and Boyle, 1983 Henderson and O Nions, 1995). Generally ages are established by orbital tuning (Imbrie et al., 1984). However, in specific instances where forams have been separated from uranium-rich carbonate bank sediments, the bank sediments have been dated by °Th methods, yielding radiometric chronologies for the foram 180/1 0 record (Slowey et al., 1996 Henderson and Slowey, 2000 Robinson et al., 2002). 

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