Publication Type:

Journal Article

Authors:

Gibson, Harold L.; Kerr, David J.; Cattalani, Sergio

Source:

Exploration and Mining Geology, Canadian Institute of Mining, Metallurgy and Petroleum, Montreal, QC, Canada, Volume 9, Number 2, p.91-111 (2000)

ISBN:

0964-1823

Keywords:

cadmium, Canada, Cochrane District Ontario, copper ores, eastern canada, faults, gold ores, grabens, Horne Mine, Hydrothermal alteration, indium, isotope ratios, Isotopes, Kidd Creek Mine, massive deposits, massive sulfide deposits, metal ores, metals, metasomatism, mineral deposits, genesis, Mineral exploration, mines, models, O-18/O-16, ocean floors, Ontario, oxygen, quebec, resources, Stable isotopes, systems, tin, VOLCANISM

Abstract:

The Horne mine between 1927 and 1989 produced some 260 t of Au and 1.13 Mt of Cu from 53.7 Mt of ore that averaged 2.22% Cu, 6.1 g/t Au and 13 g/t Ag. The total value of Au and Cu production from the Horne deposit at metal prices of US $300/oz Au and US $1.00/lb Cu is US $5.2 billion. The Thomson-Chadbourne Syndicate discovered the deposit in 1923 and the syndicate quickly grew to become Noranda, one of the world's premier mining companies. The Horne deposit influenced and continues to influence genetic models for volcanogenic massive sulphide (VMS) deposits. Early observations at Horne contributed to an epigenetic replacement theory for VMS deposits. The most recent genetic model for the Horne, invoking sub-seafloor sulphide replacement of silicified and sericitized volcaniclastic host rocks within a graben, has subsequently been proposed for another giant VMS deposit, the Kidd Creek mine. The Horne and Kidd Creek deposits show many similarities. Notable differences between the two deposits include the lack of andesitic, basaltic or komatiitic flows at Horne, different inferred water depths, high Au content at Horne, but sub-economic to economic concentrations of Sn, In and Cd at Kidd Creek.

Notes:

GeoRef, Copyright 2018, American Geological Institute.<br/>2002-057560