Please use this identifier to cite or link to this item:
Export to Endnote
Title: The timing of sulfide mineralisation at the Reward, Rockface and Bellbird deposits, Jervois mineral field, Aileron Province
Report id: NTGS Record 2023-007
Year: 2023
Author: McGloin, MV
Creaser, RA
Whelan, JA
Weisheit, A
Abstract: Molybdenite and pyrite in five mineralised samples from the Jervois mineral field, northeastern Aileron Province, Central Australia were dated using the Re–Os (rhenium-osmium) method. Three samples with molybdenite were collected from the Reward polymetallic deposit and one from the Rockface Cu–Ag (copper-silver) deposit. One sample with pyrite was collected from the Bellbird polymetallic deposit. The molybdenite samples from the Reward deposit yielded ages of 1766 ± 8 Ma, 1763 ± 8Ma, and 1706 ± 7 Ma; the molybdenite sample from the Rockface deposit yielded an age of 1742 ± 8 Ma. Pyrite from the Bellbird deposit sample failed to yield a robust or geologically meaningful age.
Sulfides from the Reward deposit with an age of ca 1.77 Ga are directly associated with chalcopyrite (the main ore mineral at the Jervois deposits) and are therefore interpreted to provide an absolute age for the timing of this copper mineralisation. The other Reward deposit age of 1.76 Ga and the results of ca 1.74 Ga at the Rockface deposit and ca 1.71 Ga at the Reward deposit provide minimum ages for alteration or deformation of these samples, or remobilisation of pre-existing copper mineralisation.
In context with other regional data, all four new molybdenite ages suggest that hydrothermal activity related to mineralisation in the Jervois mineral field occurred during the Paleoproterozoic, contemporaneously with the intrusion of multiple pulses of silicate magma during a high-temperature and low-pressure tectonothermal cycle.
Publisher: Northern Territory Geological Survey
Document Type: NTGS Record
Access Constraint: With the exception of the Northern Territory of Australia logo and other government and corporate logos, and where otherwise noted, all material in this publication is provided under a Creative Commons Attribution 4.0 International licence ( You are free to re-use the work under the licence, on the condition that you attribute the Northern Territory of Australia (Northern Territory Geological Survey) and comply with the other licence terms.
Date Added: 29-Aug-2023
Appears in Collections:Reports, Records, Books

Files in this Report:
File SizeFormat Add to
NTGSRec2023-007.pdf24.33 MBPDF Add

Items in GEMIS are protected by copyright unless otherwise indicated.

Get Adobe Reader