D. Pirrie et al., Platinum-group mineralization in the Tertiary Igneous Province: new data from Mull and Skye, Scottish Inner Hebrides, UK, GEOL MAG, 137(6), 2000, pp. 651-658
In recent years, platinum-group mineral deposits have been reported from se
veral of the Tertiary igneous complexes in East Greenland. These intrusions
form part of the same igneous province as the Tertiary igneous centres in
northwest Scotland, and recent work confirmed the presence of abundant plat
inum-group minerals in the Rum Central Complex. In this paper we report for
the first time the presence of abundant and diverse platinum-group mineral
s from the Tertiary Pen Buie intrusion on Mull and the Cuillin Complex of S
kye, Inner Hebrides, Scotland. The platinum-group minerals in the Ben Buie
intrusion are associated with chromitite layers in ultramafic cumulates. Th
e grains are small (1-2 mum), locally very abundant, and dominated by Pd-Bi
-Te-Sb phases. In the Peridotite Series of the Cuillin Complex, the platinu
m-group minerals are dominated by laurite commonly enclosed within chromite
or silicate. A combined orthomagmatic-hydromagmatic origin is proposed for
the mineralization. However, the style and type of mineralization differs
between each of the igneous centres. Platinum-group element mineralization
is a ubiquitous feature of the Tertiary Igneous Province in northwest Scotl
and and in Greenland and is intimately linked to the regional tectonic sett
ing.