Other Potential Mineral Resources

Projects in Odyssey's Portfolio

Lihir Subsea Gold


Polymetallic Sulfides

Polymteallic suflides are mineral deposits found on the ocean floor containing copper, zinc, gold, silver and other trace metals.  Polymetallic sulfide styles of mineralization commonly occur along tectonic plate boundaries and within volcanic provinces. Styles of mineralization can be highly variable and depend on setting and formational conditions.  Mineral accumulations in the polymetallic sulfide group may be actively forming or extinct inactive systems.  Styles of mineralization include hybrid epithermal-porphyry, sedimentary exhalative deposit replacement, and seafloor massive sulfides (SMS).  Deposits and occurrences of SMS have especially attracted significant interest since the late 20th century. SMS deposits are found in areas of active or complex tectonic or volcanogenic activity, such as near oceanic spreading centers (such as the Mid-Atlantic Ridge and East Pacific Rise), back-arc basins (such as the Manus Basin in PNG waters) and submarine arc volcanic chains (such as Kermadec Arc in New Zealand waters).  SMS deposits occur in a variety of global locations.  Odyssey has extensive experience in the discovery and evaluation of numerous polymetallic sulfide systems in the western Pacific and Kermadec Arc, where our high level of discovery success is driven by an ability to adapt exploration techniques and evaluation requirements to suit characteristics for the various polymetallic sulfide mineral styles. 

Polymetallic Crusts

Polymetallic crusts represent accumulations of manganese and iron containing elevated levels of cobalt, nickel, copper and rare earth elements. They are identified throughout the oceans and are also referred to as cobalt-bearing ferromanganese crusts. Polymetallic crusts form thin layers typically less than 25 centimeters thick on upper surfaces of volcanic rock forming at the seabed interface. Their occurrence is linked to older seamounts and guyots in a wide range of water depths between 400 to 4000 meters, where metals are sourced from seawater. They have an association to areas in the ocean with prevailing bottom currents, where currents prevent the accumulation of sediment and burial of the crusts. 


Marine Placer

Marine placer styles of mineralization are the product of erosion, transportation and re-deposition of mineral concentrations from primary terrestrial source areas to secondary locations in a marine environment. A wide suite of marine placer mineral concentrations are known whereby mineral species range from those that contain stable minerals with light to heavy elements. Placer styles of mineralization can include: titanium and iron (titanomagnetite, ilmenite), gold and silver (electrum), platinum, tin (cassiterite), rare earth elements (monazite, zircon), phosphate (apatite), precious stones (ruby, sapphire, diamond) and industrial minerals such as limestone and silica (quartz). Concentrations of placer minerals are typically located in shallow water along continental margins where they may be of fluviatile origin developed during geological periods of low sea-level or of eluvial origin associated with submarine erosion processes. 

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