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Age and tectonic setting of the Bavanat Cu-Zn-Ag Besshi-type volcanogenic massive sulfide deposit, southern Iran


Mousivand, F and Rastad, E and Meffre, S and Peter, JM and Mohajjel, M and Zaw, K and Emami, MH, Age and tectonic setting of the Bavanat Cu-Zn-Ag Besshi-type volcanogenic massive sulfide deposit, southern Iran, Mineralium Deposita, 47, (8) pp. 911-931. ISSN 0026-4598 (2012) [Refereed Article]

Copyright Statement

Copyright Springer-Verlag 2012

DOI: doi:10.1007/s00126-012-0407-6


The Bavanat Cu-Zn-Ag Besshi-type volcanogenic massive sulfide (VMS) deposit occurs within the Surian volcano-sedimentary complex in the Sanandaj-Sirjan zone (SSZ) of southern Iran. The Surian complex is comprised of pelite, sandstone, calcareous shale, basalt, gabbro sills, and thin-bedded limestone. Mineralization occurs as stratiform sheet-like and tabular orebodies hosted mainly by greenschist metamorphosed feldspathic and quartz feldspathic sandstone, basalt, and pelites. The basalts of the Surian complex show predominantly tholeiitic to transitional affinities, with a few samples that are alkalic in composition. Primitive mantle-normalized trace and rare earth element (REE) patterns of the Surian basalts display depletions in light REE, negative anomalies of Nb, Ta, and Ti, and positive anomalies of P. Positive P anomalies are indicative of minor crustal contamination. Furthermore, Th enrichments in the mid-ocean ridge basalt-normalized patterns of the Surian basalts are characteristic of rifted arc basalts emplaced in continental margin subduction zones. The high MgO content (>6wt.%) of most Surian basalts and low TiO2 content of two samples (0.53 and 0.62wt.%) are characteristic of boninites. The aforementioned features of the basalts indicate arc tholeiites emplaced in intra-arc rift environments and continental margin subduction zones. U-Pb dating by laser ablation- inductively coupled plasma mass spectrometry of detrital zircons extracted from the host feldspathic and quartz feldspathic sandstone yields various ages that are predominantly Permian and Triassic; however, the youngest zircons give a mean Early Jurassic concordant U-Pb age of 191 12Ma. This age, together with geological and petrochemical data, indicate that VMS mineralization formed in the Early Jurassic in pull-apart basins within the SSZ. These basins and the VMS mineralization may be temporally related to an intra-arc volcano-plutonic event associated with Neo-Tethyan oblique subduction.

Item Details

Item Type:Refereed Article
Keywords:Bavanat, Besshi, VMS, UPb, SSZ, Iran
Research Division:Earth Sciences
Research Group:Geology
Research Field:Resource geoscience
Objective Division:Mineral Resources (Excl. Energy Resources)
Objective Group:Mineral exploration
Objective Field:Zinc ore exploration
UTAS Author:Meffre, S (Professor Sebastien Meffre)
UTAS Author:Zaw, K (Professor Khin Zaw)
ID Code:81415
Year Published:2012
Funding Support:Australian Research Council (CE0561595)
Web of Science® Times Cited:19
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2012-12-05
Last Modified:2013-04-04
Downloads:6 View Download Statistics

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