But now the differences, firstly, sedex deposits are generally formed in faultbounded sedimentary basins on continental crust rather than in volcanic piles on oceanic crust. Sedimentary exhalative origin for magnetite deposits of. Draft 1 1 sedimentary exhalative origin for magnetite deposits of the new jersey 2 highlands 3 peter matt, wayne powell, richard volkert, matthew gorring and al johnson 4 5 abstract 6 the new jersey highlands and contiguous hudson new york highlands host hundreds of 7 small, workedout magnetite mines, and the major zincoxide deposits of franklin and sterling. Geologic criteria for the assessment of sedimentary exhalative sedex znpbag deposits. Sedimentaryexhalative sedex deposits are one of the most important types of metal ore deposits. Proterozoic sedimentary exhalative sedex deposits 171 sulfate sul. Diagrammatic cross section showing mineral zoning in sedimentary exhalative znpb deposits from briskey, 1986. The genesis of such economic deposits has been problematic. The stratigraphy and sedimentology of sedimentary basins. Ore deposit is a natural concentration of one or more minerals within the host rock.
Proterozoic sedimentary exhalative sedex deposits and. Geologic criteria for the assessment of sedimentary. Sedimentary manganese deposits mn behaves chemically much the same way fe does, mixed concentrations are easy to imagineexplain but how do we get mn. The sedimentaryexhalative meggen znpb sulfide and barite. For sedex deposits, the basin needs to accumulate several kilometres or tens of kilometres of oxygen lacking sediment, usually shells. For this reason, vms deposits are classified under the general heading of exhalative deposits, which includes sedimentary exhalative sedex and sedimentary nickel deposits eckstrand et al.
By leia michele toovey exclusive to copper investing news. Sedimentary exhalative deposits investing news network march 31st, 2011 sedex deposits are a major source of minerals including copper, silver, gold and tungsten and the single most important. The sedimentary exhalative meggen znpb sulfide and barite deposit, germany. Sedex, or sedimentary exhalative deposits, are ore deposits formed when hydrothermal fluids enter a water reservoir, such as an ocean. Lady loretta, mcarthur river, mount isa, hyc, and broken hill australia. Principles of sedimentary basin analysis springerlink. There is typically a moundshaped to tabular, stratabound body composed principally of massive 40% sulphide, quartz and subordinate phyllosili. Geology and platetectonic setting explanatory notes a slide presentation and explanatory notes compiled in april 2005 by andreas g.
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