isoRatios

A data set containing some isotopic ratios regular used in earth science

datasets

Reference datasets commonly used in the geosciences. These include
standard atomic weights of the elements, a periodic table, a list of minerals
including their abbreviations and chemistry, geochemical data of reservoirs
(primitive mantle, continental crust, mantle, basalts, etc.), decay constants
and isotopic ratios frequently used in geochronology, color codes of the
chronostratigraphic chart. In addition, the package provides functions for
basic queries of atomic weights, the list of minerals, and chronostratigraphic
chart colors. All datasets are fully referenced, and a BibTeX file containing
the references is included.

Gerald Schuberth-Hlavač

georefdatar

Geosciences Reference Datasets

isoRatios function

A data frame with 3 rows and the following
4 columns: <ol>
<li><code>name</code> of the isotopic ratio -- twice the element symbol and mass number</li>
<li><code>value</code> it's value and</li>
<li><code>err</code> uncertainty as given by the reference. Uncertainty may be <code>NA</code> if
not stated.</li>
<li><code>refkey</code> key to reference. Also makes the entry in this table unique if
there is more than one ratio for the isotopes</li>
</ol>The following isotopic ratios are included: <ul>
<li>Ar40Ar36</li>
<li>U238U235 </li>
</ul>Some of them are included more than once in this table because their values
changed over time or are still under discussion.

Format

Isotopic rations — isoRatios

A data frame with 3 rows and the following
4 columns: <ol>
<li><code>name</code> of the isotopic ratio -- twice the element symbol and mass number</li>
<li><code>value</code> it's value and</li>
<li><code>err</code> uncertainty as given by the reference. Uncertainty may be <code>NA</code> if
not stated.</li>
<li><code>refkey</code> key to reference. Also makes the entry in this table unique if
there is more than one ratio for the isotopes</li>
</ol>

The following isotopic ratios are included: <ul>
<li>Ar40Ar36</li>
<li>U238U235 </li>
</ul>

Some of them are included more than once in this table because their values
changed over time or are still under discussion.

isoRatios: Isotopic rations

Description

Usage

Arguments

Format

References