This table summaries monazite 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, titanite/sphene and apatite reference materials are also available.
Name | Age (Ma) | Reference | Initial amount | Available grain size* | U conc (µg/g) | Th conc (µg/g) |
HSA47 | 1842 | 1d | n/r | 4700 | n/r | |
RW-1 | 904 | 2d | 44 g | 300 µm | ca. 3000 | ca. 135,000 |
Manangoutry | 553 | 1d | n/r | 894 | n/r | |
Moacyr | 511.2 | 3d | n/r | 878-1070 | 70,000 | |
Diamantina | 495.26 | 4d | 2 crystals | chips | 53-400 | ca. 3600 |
K00-63 | 446 | 5d, 6d | 22 grains | ca. 7000 | ca. 40,000 | |
44069 | 424.9 | 7d | <outcr> | depleted | 1684-4099 | 24,000-42,000 |
Trebilcock | 280 | 8d | multiple crystals | depleted | ca. 6300 | ca. 2000 |
Amelia | 274.29 | 6d, 9d | 1 crystal | ca. 4000 | 120,000 | |
RP1 | 64.4 | 1d | n/r | 2139 | n/r | |
FC1 | 55.7 | 1d | n/r | 11,800 | n/r | |
554 | ca. 50 | 9d, 10d | n/r | 130 | 38,000 |
n/r = not reported |
*only reported where the material is described as intended for distribution |
<outcr> = multi-grain material from outcrop |
References
1d. Horstwood et al. (2003). Journal of Analytical Atomic Spectrometry, 18 (8), 837-846 |
2d. Ling et al. (2017). Mineralogy and Petrology, 111, 163-172 |
3d. Gasquet et al. (2010). Bulletin de la Société Géologique de France, 181 (3), 227-241 |
4d. Gonçalves et al. (2018). Geostandards and Geoanalytical Research, 42 (1), 25-47 |
5d. Corrie and Kohn (2007). Geology, 35 (7), 627-630 |
6d. Kohn and Vervoort (2008). Geochemistry, Geophysics, Geosystems, 9/4 |
7d. Aleinikoff et al. (2006). Geological Society of America Bulletin, 118, 39-64 |
8d. Tomascak at al. (1996). Journal of Geology, 104, 185-195 |
9d. Peterman et al. (2012). Chemical Geology, 312-313, 58–73 |
10d. Harrison et al. (1999). Journal of Petrology, 40, 3-19 |