James R. Hein
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View article: Controls on cobalt concentrations in ferromanganese crusts from the Magellan seamounts, west Pacific
Controls on cobalt concentrations in ferromanganese crusts from the Magellan seamounts, west Pacific Open
Introduction Cobalt is the most important critical element in ferromanganese crusts. Co concentration in the Fe-Mn crusts is one of the key parameters for determination of the Co resource. Thus, it is essential to clarify the controls on t…
View article: Neogene Hydrothermal Fe‐ and Mn‐Oxide Mineralization of Paleozoic Continental Rocks, Amerasia Basin, Arctic Ocean
Neogene Hydrothermal Fe‐ and Mn‐Oxide Mineralization of Paleozoic Continental Rocks, Amerasia Basin, Arctic Ocean Open
Rocks dredged from water depths of 1,605, 2,500, 3,300, and 3,400 m in the Arctic Ocean included Paleozoic continental rocks pervasively mineralized during the Neogene by hydrothermal Fe and Mn oxides. Samples were recovered in three dredg…
View article: Insights on the formation of layered ferromanganese precipitates from the southern Mariana Arc, West Pacific, from micron-scale major, minor, and trace element variations
Insights on the formation of layered ferromanganese precipitates from the southern Mariana Arc, West Pacific, from micron-scale major, minor, and trace element variations Open
View article: A Cenozoic Record of Deep Oceanic Zn Isotopic Composition in Ferromanganese Crusts
A Cenozoic Record of Deep Oceanic Zn Isotopic Composition in Ferromanganese Crusts Open
The zinc (Zn) isotopic composition (δ 66 Zn) of the deep ocean (>1000 m) can provide insights into the carbon cycle, the biological pump, and hydrothermal activity. However, we have an incomplete view of the temporal and spatial evolution …
View article: Micro-Raman mapping of critical metals (Li, Co, Ni) in a rhythmically laminated deep-ocean ferromanganese deposit
Micro-Raman mapping of critical metals (Li, Co, Ni) in a rhythmically laminated deep-ocean ferromanganese deposit Open
Deep-ocean ferromanganese deposits represent one of the most important strategic reservoirs for rare and critical metals. In particular, Mn-oxyhydroxides, such as asbolane and lithiophorite, concentrate large amounts of Li, Ni, and Co into…
View article: Environmental changes in the Arctic over the past 10 Myr based on Os Isotope Stratigraphy and Chemical composition of Ferromanganese Crusts
Environmental changes in the Arctic over the past 10 Myr based on Os Isotope Stratigraphy and Chemical composition of Ferromanganese Crusts Open
View article: Humidification of Central Asia and equatorward shifts of westerly winds since the late Pliocene
Humidification of Central Asia and equatorward shifts of westerly winds since the late Pliocene Open
View article: Crystal Chemistry of Thallium in Marine Ferromanganese Deposits
Crystal Chemistry of Thallium in Marine Ferromanganese Deposits Open
International audience
View article: Seabed mining and blue growth: exploring the potential of marine mineral deposits as a sustainable source of rare earth elements (MaREEs) (IUPAC Technical Report)
Seabed mining and blue growth: exploring the potential of marine mineral deposits as a sustainable source of rare earth elements (MaREEs) (IUPAC Technical Report) Open
The expected growth of the global economy and the projected rise in world population call for a greatly increased supply of materials critical for implementing clean technologies, such as rare earth elements (REEs) and other rare metals. B…
View article: Current status, challenges, new developments: A look to the future of deep-ocean seabed minerals
Current status, challenges, new developments: A look to the future of deep-ocean seabed minerals Open
View article: Correction to: Estimates of Metals Contained in Abyssal Manganese Nodules and Ferromanganese Crusts in the Global Ocean Based on Regional Variations and Genetic Types of Nodules
Correction to: Estimates of Metals Contained in Abyssal Manganese Nodules and Ferromanganese Crusts in the Global Ocean Based on Regional Variations and Genetic Types of Nodules Open
View article: Stable tungsten isotopic composition of seawater over the past 80 million years
Stable tungsten isotopic composition of seawater over the past 80 million years Open
View article: Geochemical insights into formation of enigmatic ironstones from Rio Grande rise, South Atlantic Ocean
Geochemical insights into formation of enigmatic ironstones from Rio Grande rise, South Atlantic Ocean Open
View article: Miocene Phosphatization of Rocks From the Summit of Rio Grande Rise, Southwest Atlantic Ocean
Miocene Phosphatization of Rocks From the Summit of Rio Grande Rise, Southwest Atlantic Ocean Open
Marine phosphorites are an important part of the oceanic phosphorus cycle and are related to the effects of long‐term global climate changes. We use petrography, mineralogy, rare earth elements contents, and 87 Sr/ 86 Sr‐determined carbona…
View article: Changes in seabed mining
Changes in seabed mining Open
• The present chapter provides an update to chapter 23 of the first World Ocean Assessment (United Nations, 2017a) in terms of shallow-water aggregate, placer deposits, ironsand deposits and phosphorite deposits. It focuses on exploration …
View article: Sphalerite Oxidation in Seawater with Covellite: Implications for Seafloor Massive Sulfide Deposits and Mine Waste
Sphalerite Oxidation in Seawater with Covellite: Implications for Seafloor Massive Sulfide Deposits and Mine Waste Open
Metal sulfide minerals exist in several marine environments and are in thermodynamic disequilibrium with oxygenated seawater from the time of their formation. Oxidation is both ubiquitous and heterogeneous, as observational and experimenta…
View article: Spectroscopic Insights Into Ferromanganese Crust Formation and Diagenesis
Spectroscopic Insights Into Ferromanganese Crust Formation and Diagenesis Open
Marine ferromanganese deposits, often called the scavengers of the sea, adsorb and coprecipitate with a wide range of metals of great interest for paleo‐environmental reconstructions and economic geology. The long (up to ∼75 Ma), near‐cont…
View article: Effects of Phosphatization on the Mineral Associations and Speciation of Pb in Ferromanganese Crusts
Effects of Phosphatization on the Mineral Associations and Speciation of Pb in Ferromanganese Crusts Open
The older layers of thick ferromanganese (FeMn) crusts from the central Pacific Ocean have undergone diagenetic phosphatization, during which carbonate fluorapatite (CFA) filled fractures and pore space and replaced carbonates. The effects…
View article: Low-temperature, shallow-water hydrothermal vent mineralization following the recent submarine eruption of Tagoro volcano (El Hierro, Canary Islands)
Low-temperature, shallow-water hydrothermal vent mineralization following the recent submarine eruption of Tagoro volcano (El Hierro, Canary Islands) Open
View article: Genesis and Evolution of Ferromanganese Crusts from the Summit of Rio Grande Rise, Southwest Atlantic Ocean
Genesis and Evolution of Ferromanganese Crusts from the Summit of Rio Grande Rise, Southwest Atlantic Ocean Open
The Rio Grande Rise (RGR) is a large elevation in the Atlantic Ocean and known to host potential mineral resources of ferromanganese crusts (Fe–Mn), but no investigation into their general characteristics have been made in detail. Here, we…
View article: Hydrogenetic Fe-Mn crusts from European seas: source of potentially economic cobalt mining.
Hydrogenetic Fe-Mn crusts from European seas: source of potentially economic cobalt mining. Open
<p>The world increasing demand of electric vehicles (EVs) that use lithium-ion batteries (LIB), in which cobalt is one of the essential elements, focused the attention on its demand that is calculated will increase of 7-13% annually …
View article: Critical minerals in the European seas: The project GeoERA-MINDeSEA
Critical minerals in the European seas: The project GeoERA-MINDeSEA Open
<p>The oceans and seas cover more than 70% of the planet, representing a promising new frontier for mineral resources exploration, and an enormous challenge for science and technology. Communities are demanding actions to address glo…
View article: Geographic and Oceanographic Influences on Ferromanganese Crust Composition Along a Pacific Ocean Meridional Transect, 14 N to 14S
Geographic and Oceanographic Influences on Ferromanganese Crust Composition Along a Pacific Ocean Meridional Transect, 14 N to 14S Open
The major controls on the variability of ferromanganese (FeMn) crust composition have been generally described over the past 40 years; however, most compilation studies lack quantitative statistics and are limited to a small region of seve…
View article: Processes that Impact the Composition of FeMn Crusts from the Pacific Ocean and their Use in Refining Permissive Criteria
Processes that Impact the Composition of FeMn Crusts from the Pacific Ocean and their Use in Refining Permissive Criteria Open
View article: Tungsten Isotope Constraints on the Cenozoic Sulfur Cycle
Tungsten Isotope Constraints on the Cenozoic Sulfur Cycle Open
View article: Platinum enrichment and phase associations in marine ferromanganese crusts and nodules based on a multi-method approach
Platinum enrichment and phase associations in marine ferromanganese crusts and nodules based on a multi-method approach Open
View article: Multidisciplinary Scientific Cruise to the Rio Grande Rise
Multidisciplinary Scientific Cruise to the Rio Grande Rise Open
Rio Grande Rise (RGR) is a broad elevation in the South Atlantic Ocean consisting of western and eastern parts, that in total measures about 874 km east-west by about 480 km north-south. There is a scarcity of available information to the …
View article: Data for: Tectonic and paleoceanographic environment in the northern South China Sea for the past 3.2 million years: Evidenced from high-resolution geochemistry, mineralogy and isotopes of hydrogenous ferromanganese nodules
Data for: Tectonic and paleoceanographic environment in the northern South China Sea for the past 3.2 million years: Evidenced from high-resolution geochemistry, mineralogy and isotopes of hydrogenous ferromanganese nodules Open
Figure S1. The major and trace elements of the Fe-Mn nodule in the northern South China Sea.
View article: Benthic organism (box corer) from the multidisciplinary scientific cruise (RGR1) to the Rio Grande Rise
Benthic organism (box corer) from the multidisciplinary scientific cruise (RGR1) to the Rio Grande Rise Open
View article: Supplementary Files: Integrated Geochemical And Morphological Data Provide Insights Into The Genesis Of Ferromanganese Nodules
Supplementary Files: Integrated Geochemical And Morphological Data Provide Insights Into The Genesis Of Ferromanganese Nodules Open
Supplementary Files: Integrated Geochemical and Morphological Data Provide Insights into the Genesis of Ferromanganese Nodules