adjust.fractionation

Calculate the radiocarbon age by adjusting a sample's d13C to the reference d13C of -25 permil. It is planned to update this function to more properly reflect calculations in the 14CHRONO lab.

Provides functions for the calibration of radiocarbon dates, as well as options to calculate different radiocarbon realms (C14 age, F14C, pMC, D14C) and estimating the effects of contamination or local reservoir offsets (Reimer and Reimer 2001 <doi:10.1017/S0033822200038339>). The methods follow long-established recommendations such as Stuiver and Polach (1977) <doi:10.1017/S0033822200003672> and Reimer et al. (2004) <doi:10.1017/S0033822200033154>. This package uses the calibration curves from the data package 'rintcal'.

Maarten Blaauw

rice

Radiocarbon Equations

adjust.fractionation function

<dl><dt>y</dt>
<dd>The age of the sample (in C14 by default, but can also be in F or pMC).</dd>
<dt>d13C</dt>
<dd>The measured d13C value.</dd>
<dt>reference_d13C</dt>
<dd>The reference/standard d13C value (OX2, oxalic acid 2, NIST SRM 4990C made from 1977 French beet molasses), set at -25 permil by default.</dd>
<dt>realm</dt>
<dd>Type of radiocarbon age. Can be in `C14` (default), `F14C` or `pMC`.</dd></dl>

Arguments

Author

Adjust a radiocarbon age for fractionation — adjust.fractionation

<dl>

<dt>y</dt>
<dd>The age of the sample (in C14 by default, but can also be in F or pMC).</dd>


<dt>d13C</dt>
<dd>The measured d13C value.</dd>


<dt>reference_d13C</dt>
<dd>The reference/standard d13C value (OX2, oxalic acid 2, NIST SRM 4990C made from 1977 French beet molasses), set at -25 permil by default.</dd>


<dt>realm</dt>
<dd>Type of radiocarbon age. Can be in `C14` (default), `F14C` or `pMC`.</dd>

</dl>

adjust.fractionation: Adjust a radiocarbon age for fractionation

Description

Usage

Value

Arguments

Author

Details

Examples