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The Jebel Ohier deposit—a newly discovered porphyry copper–gold system in the Neoproterozoic Arabian–Nubian Shield, Red Sea Hills, NE Sudan

Citation

Bierlein, FP and McKeag, S and Reynolds, N and Bargmann, CJ and Bullen, W and Murphy, FC and Al-Athbah, H and Brauhart, C and Potma, W and Meffre, S and McKnight, S, The Jebel Ohier deposit a newly discovered porphyry copper-gold system in the Neoproterozoic Arabian-Nubian Shield, Red Sea Hills, NE Sudan, Mineralium Deposita, 51, (6) pp. 713-724. ISSN 0026-4598 (2016) [Refereed Article]

Copyright Statement

Copyright Springer-Verlag 2015

Official URL: http://dx.doi.org/0.1007/s00126-015-0630-z

DOI: doi:10.1007/s00126-015-0630-z

Abstract

Ongoing exploration in the Red Sea Hills of NE Sudan has led to the identification of a large alteration–mineralization system within a relatively undeformed Neoproterozoic intrusive–extrusive succession centered on Jebel Ohier. The style of mineralization, presence of an extensive stockwork vein network within a zoned potassic-propylitic-argillic-advanced argillic-altered system, a mineralization assemblage comprising magnetite-pyrite-chalcopyrite-bornite (±gold, silver and tellurides), and the recurrence of fertile mafic to intermediate magmatism in a developing convergent plate setting all point to a porphyry copper–gold association, analogous to major porphyry Cu–Au–Mo deposits in Phanerozoic supra-subduction settings such as the SW Pacific. Preliminary U–Pb age dating yielded a maximum constraint of c. 730 Ma for the emplacement of the stockwork system into a significantly older (c. 800 Ma) volcanic edifice. The mineralization formed prior to regional deformation and accretion of the host terrane to a stable continental margin at by c. 700 Ma, thus ensuring preservation of the deposit. The Jebel Ohier deposit is interpreted as a relatively well-preserved, rare example of a Neoproterozoic porphyry Cu–Au system and the first porphyry Cu–Au deposit to be identified in the Arabian–Nubian Shield.

Item Details

Item Type:Refereed Article
Keywords:porphyry
Research Division:Earth Sciences
Research Group:Geology
Research Field:Ore Deposit Petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Meffre, S (Dr Sebastien Meffre)
ID Code:109846
Year Published:2016
Funding Support:Australian Research Council (CE0561595)
Web of Science® Times Cited:1
Deposited By:CODES ARC
Deposited On:2016-07-04
Last Modified:2017-09-05
Downloads:0

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