Photographs of example Cook Islands manganese nodules from “Critical metals in manganese nodules from the Cook Islands EEZ, abundances and distributions,” Ore Geology Reviews v.68 (2015), by Hein and others, online at doi:10.1016/j.oregeorev.2014.12.011.
Little is known about the resource potential of the vast mineral deposits that occur within the 200 nautical mile Exclusive Economic Zone (EEZ) of the United States. The U.S. EEZ encompasses 3.4 million square nautical miles, an area about 20% greater than the land area of the U.S. Quantitative information about U.S. EEZ resources is essential in order for the Federal and State governments to make informed decisions about:
The goals of the Pacific EEZ Minerals Study are to
Interest in mining seafloor massive sulfides (SMS), which occur as a result of hydrothermal activity in the global ocean, is increasing and will likely begin in earnest within the next several years. The geochemical and environmental implications of this exploitation have not been constrained. The mining of SMS deposits will likely create a new class of abundant micron and sub-micron sized metal sulfide particles. These new particulates may potentially be more reactive than naturally occurring particles, with regard to oxidation and microbial colonization. This Mendenhall Postdoctoral project will evaluate the local-to-global geochemical consequences of the alteration of sulfide particles likely to occur as a result of SMS mining relative to similar particles emitted from natural hydrothermal systems, and will consider potential environmental perturbations due to SMS resource extraction.
The goals of this project are to:
Critical metals in manganese nodules from the Cook Islands EEZ, abundances and distributions - Ore Geology Reviews v.68, 2015
Persistence of deeply sourced iron in the Pacific Ocean - Proceedings of the National Academy of Sciences v.112, 2015
Discriminating between different genetic types of marine ferro-manganese crusts and nodules based on rare earth elements and yttrium - Chemical Geology v.381, 2014
Deep-Ocean Ferromanganese Crusts and Nodules - Treatise on Geochemistry v.13: Geochemistry of Mineral Deposits, 2014
Layered Hydrothermal Barite-Sulfide Mound Field, East Diamante Caldera, Mariana Volcanic Arc - Economic Geology v.109, 2014
Molecular controls on Cu and Zn isotopic fractionation in Fe-Mn crusts - Earth and Planetary Science Letters v.396, 2014
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