10.6084/m9.figshare.3454454.v1
Sarah C. Sherlock
Sarah C.
Sherlock
Kevin A. Jones
Kevin A.
Jones
R.Graham Park
R.Graham
Park
Grenville-age pseudotachylite in the Lewisian: laserprobe <sup>40</sup>Ar/<sup>39</sup>Ar ages from the Gairloch region of Scotland (UK)
Geological Society of London
2016
Lewisian
laserprobe
pseudotachylite data
Ma
IR
mineral
Ar
UK
Geology
2016-06-21 12:07:40
Dataset
https://geolsoc.figshare.com/articles/dataset/Grenville-age_pseudotachylite_in_the_Lewisian_laserprobe_sup_40_sup_Ar_sup_39_sup_Ar_ages_from_the_Gairloch_region_of_Scotland_UK_/3454454
<p>Infrared laserprobe <sup>40</sup>Ar/<sup>39</sup>Ar dating has been used to date pseudotachylite and host-rock minerals from a crush belt in the Lewisian basement of Scotland.
It has revealed complexity in the pseudotachylite data that is attributable to the presence of refractory host-rock clasts
and mineral fragments in the pseudotachylite. In conjunction with the host-rock mineral laserprobe <sup>40</sup>Ar/<sup>39</sup>Ar data it has been possible to simplify the pseudotachylite data for the samples, and the preferred ages for these are: 980
± 39 Ma, 999 ± 31 Ma and 1024 ± 30 Ma (2σ). These ages are the first record of Grenville-aged brittle deformation in the Lewisian.
Further, this study serves to illustrate the complexity of dating pseudotachylites, and the advantages and limitations of
the IR laserprobe applied to such materials.
</p>