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Porphyry Cu fertility of the Loch Lilly-Kars Belt, Western New South Wales, Australia

Citation

Baatar, B and Parra-Avila, LA and Fiorentini, ML and Polito, P and Crawford, AJ, Porphyry Cu fertility of the Loch Lilly-Kars Belt, Western New South Wales, Australia, Australian Journal of Earth Sciences, 67, (1) pp. 75-87. ISSN 0812-0099 (2020) [Refereed Article]

Copyright Statement

 2019 Geological Society of Australia

DOI: doi:10.1080/08120099.2019.1637937

Abstract

This study investigates the prospectivity for porphyry Cu mineralisation of the early Paleozoic Loch Lilly-Kars Belt, which follows the southern margin of the Paleoproterozoic Broken Hill (Willyama) Inlier in western New South Wales, Australia. The belt is thought to have resulted from the 515-510 Ma collision of a volcanic passive margin and an intra-oceanic island arc above a west-dipping subduction zone, with subsequent post-collisional magmatism. To identify fertility signals of selected magmatic intrusive rocks, we combined whole-rock analyses with in-situ zircon trace-element and isotopic measurements. Data reveal that both Cambrian (ca 496 Ma) and Devonian (ca 393 Ma) intrusive suites are present in the Loch Lilly-Kars Belt. Cambrian dioritic rocks are largely non-fertile for porphyry Cu mineralisation, whereas Devonian monzodiorites and monzonitic porphyries carry strong fertility signals that include high whole-rock Sr/Y (>35) and V/Sc (>10) values, associated with the occurrence of equant, stubby zircons showing relatively constant Eu/Eu* values without any significant Eu anomalies. Although only few samples were analysed and more intensive exploration is required, the results of this study indicate significant potential for porphyry Cu mineralisation in this poorly known belt.

Item Details

Item Type:Refereed Article
Keywords:zircon trace elements, U-Pb geochronology, O isotopes, porphyry Cu mineralisation, Loch Lilly-Kars Belt, New South Wales
Research Division:Earth Sciences
Research Group:Atmospheric sciences
Research Field:Adverse weather events
Objective Division:Environmental Management
Objective Group:Air quality, atmosphere and weather
Objective Field:Weather
UTAS Author:Crawford, AJ (Professor Anthony Crawford)
ID Code:152010
Year Published:2020
Web of Science® Times Cited:2
Deposited By:Earth Sciences
Deposited On:2022-08-10
Last Modified:2022-09-20
Downloads:0

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