isoRatios {georefdatar}R Documentation

Isotopic rations

Description

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

Usage

isoRatios

Format

A data frame with 3 rows and the following 4 columns:

  1. name of the isotopic ratio – twice the element symbol and mass number

  2. value it's value and

  3. err uncertainty as given by the reference. Uncertainty may be NA if not stated.

  4. refkey key to reference. Also makes the entry in this table unique if there is more than one ratio for the isotopes

The following isotopic ratios are included:

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

References

Steiger RH, Jäger E (1977). “Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology.” Earth and Planetary Science Letters, 36(3), 359–362. doi:10.1016/0012-821x(77)90060-7.

Lee J, Marti K, Severinghaus JP, Kawamura K, Yoo H, Lee JB, Kim JS (2006). “A redetermination of the isotopic abundances of atmospheric Ar.” Geochimica et Cosmochimica Acta, 70(17), 4507–4512. ISSN 0016-7037, doi:10.1016/j.gca.2006.06.1563.

Hiess J, Condon DJ, McLean N, Noble SR (2012). “238U/235U systematics in terrestrial uranium-bearing minerals.” Science, 335(6076), 1610–1614. doi:10.1126/science.1215507.

[Package georefdatar version 0.6.5 Index]