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Explanation for many of the unusual features of the massive sulfide deposits of the Iberian pyrite belt


Solomon, M and Tornos, F and Gaspar, OC, Explanation for many of the unusual features of the massive sulfide deposits of the Iberian pyrite belt, Geology, 30, (1) pp. 87-90. ISSN 0091-7613 (2002) [Refereed Article]

DOI: doi:10.1130/0091-7613(2002)030<0087:EFMOTU>2.0.CO;2


Newly published fluid-inclusion data from quartz in stockwork veins beneath seven massive sulfide lenses in the Iberian pyrite belt suggest that the lenses were formed from fluids that on reaching the sea reversed buoyancy and ponded in basins. Sulfides quenched in the resulting brine pool would have settled to form a sulfide mud. This process provides a relatively efficient trapping mechanism for metal in the fluids and effectively excludes ambient seawater, accounting for the deposits tending to have the characteristics of large size, sheet-like form, absence of relict chimney structures, and a mineral content characterized by pyrite-arsenopyrite, and absence or scarcity of barite, marcasite, and Fe oxides. If total S was less than total metals in the stockwork fluids, some or all of the more soluble Zn and Pb could have been swept from the basin at the overflow, accounting for the variable but generally low Zn and Pb contents of the ores. The lack of sedimentary source for the high salinities implicates magmatic intrusions, possibly similar to those related to Sn-W mineralization.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Resource geoscience
Objective Division:Mineral Resources (Excl. Energy Resources)
Objective Group:Other mineral resources (excl. energy resources)
Objective Field:Other mineral resources (excl. energy resources) not elsewhere classified
UTAS Author:Solomon, M (Dr Michael Solomon)
ID Code:24750
Year Published:2002
Web of Science® Times Cited:36
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2002-08-01
Last Modified:2009-10-26

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