Apatite reference materials and their U-Pb ages

This table summaries the apatite reference materials commonly used in geochronology, listed in order of their age. Some of these materials have been reported to contain modest but significant levels of Pb-loss. Prior to considering the use of any of these materials for quality control purposes, it is strongly recommended that analysts carefully review the cited publications as well as other reports that may exist in the scientific literature. Compilations of zircon, monazite and titanite/sphene reference materials are also available.

Name Age (Ma) Reference Initial amount Available grain size* U conc (µg/g)
UWA-1 2058 or 2071 1c n/r   67
SDG 1602 2c n/r   50-52
NW-1 1160 3c n/r   61-168
Otter Lake 913 4c n/r   92
McCLure (MMap) 523.5 5c, 6c n/r   3-30
MAD 485
6c n/r chips 16-22
AP1, AP2 475
7c n/r   n/r
Slyudyanka 460 8c n/r   94.2
Kovdor 376-380 9c n/r   0.2-3.6
n/r = not reported
*only reported where the material is described as intended for distribution


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