Sulfide Emplacement in the Nova-Bollinger Deposit, Western Australia – [publication]

The Nova-Bollinger Ni-Cu sulfide deposit is associated with a small tube-shaped intrusion emplaced at lower crustal depths into granulite facies migmatite gneisses. Under these unusual conditions the timescales for cooling between the silicate solidus and sulfide solidus temperatures were of the order of millions of years, being controlled by the temperature-time path for the exhumation of the orogen as a whole. Sulfides solidified over a time period three orders of magnitude greater than the thousand-year timescale for the solidification of the host silicate magmas. Furthermore, timescales for deformation matched those for cooling and solidification, allowing the country rocks to undergo deformation during ore emplacement.

Read more about putting hot sulfides into hot rocks in the full article below:

Stephen J. Barnes, Valentina Taranovic, John M. Miller, Glenn Boyce, Steve Beresford; Sulfide Emplacement and Migration in the Nova-Bollinger Ni-Cu-Co Deposit, Albany-Fraser Orogen, Western Australia. Economic Geology 2020;; 115 (8): 1749–1776. doi: https://doi.org/10.5382/econgeo.4758