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Kira Mizell

Research Oceanographer with the USGS Pacific Coastal and Marine Science Center

Professional Experience

  • 2020-present U. S. Geological Survey Research Oceanographer

  • 2015-2019 U. S. Geological Survey PhD Student Intern Trainee

  • 2012-2015 U. S. Geological Survey Physical Science Technician

Education and Certifications

  • 2019 Ph.D. Ocean Sciences, University of California, Santa Cruz

  • 2009 B.S. Biochemistry and Molecular Biophysics, University of Arizona

Science and Products

link
Collage of black nodules or rocks of varying sizes and shapes, each 1-7 inches wide, broken in half to show their cores.

Global Marine Mineral Resources

Researching seafloor mineral resources that occur within the U.S. Exclusive Economic Zone and areas beyond national jurisdictions.
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
link

Global Marine Mineral Resources

Researching seafloor mineral resources that occur within the U.S. Exclusive Economic Zone and areas beyond national jurisdictions.
Learn More

Prospective regions for marine minerals on the Alaska Outer Continental Shelf

This shapefile is of prospective regional outlines of where marine minerals may occur on the Alaska Outer Continental Shelf (OCS). Polygons were hand digitized based on a U.S. Geological Survey (USGS) data review that considers the state of knowledge regarding marine mineral occurrences within the Alaska OCS. This data release is a companion to the USGS Professional Paper, Gartman and others, 2022
By
Pacific Coastal and Marine Science Center

Major and trace element geochemistry and mineralogy of ferromanganese crusts from seamounts within the Tuvalu Exclusive Economic Zone

Ferromanganese crusts were collected via dredge from seamounts within the Tuvalu Exclusive Economic Zone in the Pacific Ocean during cruise RR1310 funded by the National Science Foundation aboard the R/V Roger Revelle in 2013. USGS scientists requested these ferromanganese crust samples from the Oregon State University Marine and Geology Repository where they had been archived. Ferromanganese crus
By
Pacific Coastal and Marine Science Center

Marine mineral geochemical data - Part One: Pacific Ocean USGS-affiliated historical data

This data release compiles element composition data for more than 600 deep-ocean mineral samples from more than 25 research cruises in the Pacific Ocean since 1979 that involved USGS researchers. Deep-ocean mineral sample types encompassed in this data release include ferromanganese crusts, manganese nodules, phosphorites, and hydrothermal minerals. This data release is comprised of both unpublish
By
Pacific Coastal and Marine Science Center

Mineralogy, rare earth elements, and strontium isotopic composition of phosphorites and phosphatized rocks from the Rio Grande Rise, south Atlantic Ocean

Phosphorites and phosphatized rocks from the summit of the Rio Grande Rise were collected via dredge during the oceanographic research cruise RGR1 to the western RGR. The location (latitude, longitude, depth), mineralogy, concentrations of phosphorus and rare earth elements, and 87Sr/86Sr ratios of phosphorites and phosphatized FeMn crusts, ironstones and carbonates from 10 dredge sites are presen
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Sorbed-water (H2O-) corrected chemistry for ferromanganese crust samples from the western equatorial Pacific Ocean

Ferromanganese crust samples were collected via dredge during four oceanographic research cruises to the western equatorial Pacific Ocean. The location (latitude, longitude, depth) and concentrations of 27 major and trace elements in the most recent growth layers of ferromanganese crusts from 57 dredge sites are presented here, as well as select seawater chemistry at each location. These data were
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Background of coral reef beneath waves. Overlaid with photo of a smiling white woman with shoulder-length hair. Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer
Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer
Background of coral reef beneath waves. Overlaid with photo of a smiling white woman with shoulder-length hair.

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer

Research Oceanographer Kira Mizell studies change in ocean chemistry by collecting marine minerals, looking for insights into past climate conditions and geologic history.

By
Ecosystems Mission Area, Natural Hazards Mission Area, Communications and Publishing
Background of coral reef beneath waves. Overlaid with photo of a smiling white woman with shoulder-length hair.

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer

Research Oceanographer Kira Mizell studies change in ocean chemistry by collecting marine minerals, looking for insights into past climate conditions and geologic history.

By
Ecosystems Mission Area, Natural Hazards Mission Area, Communications and Publishing
Background of coral reefs beneath waves. Overlaid with photo of smiling white woman with shoulder-length hair. Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)
Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)
Background of coral reefs beneath waves. Overlaid with photo of smiling white woman with shoulder-length hair.

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)

Research Oceanographer Kira Mizell studies changes in ocean chemistry by collecting marine minerals, looking for insights into past climate conditions and geologic history.

By
Ecosystems Mission Area, Natural Hazards Mission Area, Communications and Publishing
Background of coral reefs beneath waves. Overlaid with photo of smiling white woman with shoulder-length hair.

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)

Research Oceanographer Kira Mizell studies changes in ocean chemistry by collecting marine minerals, looking for insights into past climate conditions and geologic history.

By
Ecosystems Mission Area, Natural Hazards Mission Area, Communications and Publishing
NOAA-USGS Stepping Stones 2021 Expedition
NOAA-USGS Stepping Stones 2021 Expedition

NOAA-USGS Stepping Stones 2021 Expedition

NOAA-USGS Stepping Stones 2021 Expedition

Join USGS researchers Jason Chaytor and Kira Mizell as they virtually participate in a NOAA Ocean Exploration expedition to the depths of the North Atlantic.

By
Natural Hazards, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

NOAA-USGS Stepping Stones 2021 Expedition

NOAA-USGS Stepping Stones 2021 Expedition

Join USGS researchers Jason Chaytor and Kira Mizell as they virtually participate in a NOAA Ocean Exploration expedition to the depths of the North Atlantic.

By
Natural Hazards, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center
Filter Total Items: 21

Marine minerals in Alaska — A review of coastal and deep-ocean regions

Minerals occurring in marine environments span the globe and encompass a broad range of mineral categories, forming within varied geologic and oceanographic settings. They occur in coastal regions, either from the continuation or mechanical reworking of terrestrial mineralization, as well as in the deep ocean, from diagenetic, hydrogenetic, and hydrothermal processes. The oceans cover most of the

Authors
Amy Gartman, Kira Mizell, Douglas C. Kreiner
By
Ecosystems Mission Area, Coastal and Marine Hazards and Resources Program, Alaska Science Center, Pacific Coastal and Marine Science Center, Marine Minerals Laboratory

Crystal chemistry of thallium in marine ferromanganese deposits

Our understanding of the up to 7 orders of magnitude partitioning of thallium (Tl) between seawater and ferromanganese (FeMn) deposits rests upon two foundations: (1) being able to quantify the Tl(I)/Tl(III) ratio that reflects the extent of the oxidative scavenging of Tl by vernadite (δ-MnO2), the principle manganate mineral in oxic and suboxic environments, and (2) being able to determine the so
Authors
Alain Manceau, Alexandre Simionovici, Nathaniel Findling, Pieter Glatzel, Blanka Detlefs, Anna V Wegorzewski, Kira Mizell, James R. Hein, Andrea Koschinsky
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Marine Minerals Laboratory, Deep Sea Exploration, Mapping and Characterization

Deep-ocean polymetallic nodules and cobalt-rich ferromanganese crusts in the global ocean: New sources for critical metals

The transition from a global hydrocarbon economy to a green energy economy and the rapidly growing middle class in developing countries are driving the need for considerable new sources of critical materials. Deep-ocean minerals, namely cobalt-rich ferromanganese crusts and polymetallic nodules, are two such new resources generating interest.Polymetallic nodules are essentially two-dimensional min
Authors
James R. Hein, Kira Mizell
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Marine Minerals Laboratory, Deep Sea Exploration, Mapping and Characterization

Estimates of metals contained in abyssal manganese nodules and ferromanganese crusts in the global ocean based on regional variations and genetic types of nodules

Deep-ocean ferromanganese crusts and manganese nodules are important marine repositories for global metals. Interest in these minerals as potential resources has led to detailed sampling in many regions of the global ocean, allowing for updated estimates of their global extent. Here, we present global estimates of total tonnage as well as contained metal concentrations and tonnages for ferromangan
Authors
Kira Mizell, James R. Hein, Manda Viola Au, Amy Gartman
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Marine Minerals Laboratory, Deep Sea Exploration, Mapping and Characterization

Geochemical insights into formation of enigmatic ironstones from Rio Grande rise, South Atlantic Ocean

Rio Grande Rise (RGR) is an intraplate oceanic elevation in the South Atlantic Ocean that formed at a hotspot on the Mid-Atlantic Ridge during the Cretaceous. In spreading center and hotspot environments, ironstones form mainly by biomineralization of reduced Fe from hydrothermal fluids or oxidation of sulfide deposits. However, RGR has been considered aseismic and volcanically inactive for the pa
Authors
Mariana Benites, James R. Hein, Kira Mizell, Kenneth A. Farley, Jonathon Treffkorn, Luigi Jovane
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Miocene phosphatization of rocks from the summit of Rio Grande Rise, Southwest Atlantic Ocean

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 87Sr/86Sr-determined carbonate fluorapatite (CFA) and calcite ages to investigate the paragenesis and history of phosphatization of carbonate sediments, limestones, ferromanganese crusts, and
Authors
Mariana Benites, James R. Hein, Kira Mizell, Luigi Jovane
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Ocean floor manganese deposits

Much of the dissolved Mn delivered to the oceans is slowly oxidized and precipitated alongside varying amounts of Fe into Mn and ferromanganese (FeMn) mineral deposits that occur extensively in the deep ocean wherever sediment accumulation is low and substrate is available. FeMn crusts grow as pavements on rock outcrops throughout the global ocean whereas nodules form as individual FeMn-encrusted
Authors
Kira Mizell, James R. Hein
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

The effects of phosphatization on the mineral associations and speciation of Pb in ferromanganese crusts

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 of phosphatization on individual trace metal concentrations, speciation, and phase associations in FeMn crusts remain poorly understood yet may be important to
Authors
Kira Mizell, James R. Hein, Andrea Koschinsky, Sarah M. Hayes
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Geology, Energy & Minerals Science Center, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Changes in sediment source areas to the Amerasia Basin, Arctic Ocean, over the past 5.5 million years based on radiogenic isotopes (Sr, Nd, Pb) of detritus from ferromanganese crusts

Ferromanganese (FeMn) crusts provide a useful paleoenvironmental archive for studying the poorly understood climatic, oceanographic, and geologic evolution of the Arctic Ocean. This study is based on the identification and temporal reconstruction of sources and inferred transport pathways of terrigenous material in FeMn crusts collected from several sites across the Amerasia Basin. Samples from th
Authors
Natalia Konstantinova, James R. Hein, Kira Mizell, Georgy Cherkashov, Brian Dreyer, Deborah Hutchinson
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Genesis and evolution of ferromanganese crusts from the summit of Rio Grande Rise, southwest Atlantic Ocean

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 investigate the chemical and mineralogical composition, growth rates and ages of initiation, and phosphatization of relatively shallow-water (650–825 m) Fe–Mn c
Authors
Mariana Benites, James R. Hein, Kira Mizell, Terrence Blackburn, Luigi Jovane
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Geographic and oceanographic influences on ferromanganese crust composition along a Pacific Ocean meridional transect, 14N to 14S

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 several seamounts or compare FeMn crusts from disparate areas of the global oceans. This study provides the first detailed research to address the geographic and ocea
Authors
Kira Mizell, James R. Hein, Phoebe J. Lam, Anthony A.P. Koppers, Hubert Staudigel
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Mineral phase-element associations based on sequential leaching of ferromanganese crusts, Amerasia Basin Arctic Ocean

Ferromanganese (FeMn) crusts from Mendeleev Ridge, Chukchi Borderland, and Alpha Ridge, in the Amerasia Basin, Arctic Ocean, are similar based on morphology and chemical composition. The crusts are characterized by a two- to four-layered stratigraphy. The chemical composition of the Arctic crusts differs significantly from hydrogenetic crusts from elsewhere of global ocean by high mean Fe/Mn ratio
Authors
Natalia Konstantinova, James R. Hein, Amy Gartman, Kira Mizell, Pedro Barrulas, Georgy Cherkashov, Pavel Mikhailik, Alexander Khanchuk
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Exploring the Unknown in the Deep North Atlantic Ocean

Exploring the Unknown in the Deep North Atlantic Ocean

Learning more about international waters, or the "high seas," and other unexplored deepwater areas through exploration is critical to ensuring they...

Read Article
Ferromanganese nodules on a deep-ocean seamount

Ferromanganese nodules on a deep-ocean seamount

USGS Pacific Coastal and Marine Science Center researcher Kira Mizell talks about the discovery of a ferromanganese nodule field on a seamount deep in...

Read Article
2021 North Atlantic Stepping Stones Expedition

2021 North Atlantic Stepping Stones Expedition

At 7 p.m. ET/4 p.m. PT on Wednesday, July 14, you are invited to join a live event introducing the 2021 North Atlantic Stepping Stones: New England...

Read Article
FeMn crust composition on seamounts in the west-central Pacific Ocean

FeMn crust composition on seamounts in the west-central Pacific Ocean

First detailed, large-scale study of parameters that control ferromanganese crust composition on seamounts in the west-central Pacific Ocean

Read Article
Dredging Up Clues to the Geologic History and Mineral Resources of the Rio Grande Rise, Southwest Atlantic Ocean

Dredging Up Clues to the Geologic History and Mineral Resources of the Rio Grande Rise, Southwest Atlantic Ocean

USGS scientists focused on finding iron-manganese crusts, whose chemistry reveals how the ocean has changed throughout millennia. The crusts also...

Read Article
Collecting clues to the geologic history and mineral resources of the Rio Grande Rise, southwest Atlantic Ocean

Collecting clues to the geologic history and mineral resources of the Rio Grande Rise, southwest Atlantic Ocean

USGS scientists James Hein and Kira Mizell participated in a University of São Paulo research cruise to the western Rio Grande Rise, an underwater...

Read Article
James Hein Wins Prestigious Moore Medal Award from the International Marine Minerals Society

James Hein Wins Prestigious Moore Medal Award from the International Marine Minerals Society

Research geologist is awarded for his 43-year scientific career dedicated to the study of marine minerals with the USGS.

Read Article

Science and Products

link
Collage of black nodules or rocks of varying sizes and shapes, each 1-7 inches wide, broken in half to show their cores.

Global Marine Mineral Resources

Researching seafloor mineral resources that occur within the U.S. Exclusive Economic Zone and areas beyond national jurisdictions.
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
link

Global Marine Mineral Resources

Researching seafloor mineral resources that occur within the U.S. Exclusive Economic Zone and areas beyond national jurisdictions.
Learn More

Prospective regions for marine minerals on the Alaska Outer Continental Shelf

This shapefile is of prospective regional outlines of where marine minerals may occur on the Alaska Outer Continental Shelf (OCS). Polygons were hand digitized based on a U.S. Geological Survey (USGS) data review that considers the state of knowledge regarding marine mineral occurrences within the Alaska OCS. This data release is a companion to the USGS Professional Paper, Gartman and others, 2022
By
Pacific Coastal and Marine Science Center

Major and trace element geochemistry and mineralogy of ferromanganese crusts from seamounts within the Tuvalu Exclusive Economic Zone

Ferromanganese crusts were collected via dredge from seamounts within the Tuvalu Exclusive Economic Zone in the Pacific Ocean during cruise RR1310 funded by the National Science Foundation aboard the R/V Roger Revelle in 2013. USGS scientists requested these ferromanganese crust samples from the Oregon State University Marine and Geology Repository where they had been archived. Ferromanganese crus
By
Pacific Coastal and Marine Science Center

Marine mineral geochemical data - Part One: Pacific Ocean USGS-affiliated historical data

This data release compiles element composition data for more than 600 deep-ocean mineral samples from more than 25 research cruises in the Pacific Ocean since 1979 that involved USGS researchers. Deep-ocean mineral sample types encompassed in this data release include ferromanganese crusts, manganese nodules, phosphorites, and hydrothermal minerals. This data release is comprised of both unpublish
By
Pacific Coastal and Marine Science Center

Mineralogy, rare earth elements, and strontium isotopic composition of phosphorites and phosphatized rocks from the Rio Grande Rise, south Atlantic Ocean

Phosphorites and phosphatized rocks from the summit of the Rio Grande Rise were collected via dredge during the oceanographic research cruise RGR1 to the western RGR. The location (latitude, longitude, depth), mineralogy, concentrations of phosphorus and rare earth elements, and 87Sr/86Sr ratios of phosphorites and phosphatized FeMn crusts, ironstones and carbonates from 10 dredge sites are presen
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Sorbed-water (H2O-) corrected chemistry for ferromanganese crust samples from the western equatorial Pacific Ocean

Ferromanganese crust samples were collected via dredge during four oceanographic research cruises to the western equatorial Pacific Ocean. The location (latitude, longitude, depth) and concentrations of 27 major and trace elements in the most recent growth layers of ferromanganese crusts from 57 dredge sites are presented here, as well as select seawater chemistry at each location. These data were
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Background of coral reef beneath waves. Overlaid with photo of a smiling white woman with shoulder-length hair. Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer
Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer
Background of coral reef beneath waves. Overlaid with photo of a smiling white woman with shoulder-length hair.

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer

Research Oceanographer Kira Mizell studies change in ocean chemistry by collecting marine minerals, looking for insights into past climate conditions and geologic history.

By
Ecosystems Mission Area, Natural Hazards Mission Area, Communications and Publishing
Background of coral reef beneath waves. Overlaid with photo of a smiling white woman with shoulder-length hair.

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer

Research Oceanographer Kira Mizell studies change in ocean chemistry by collecting marine minerals, looking for insights into past climate conditions and geologic history.

By
Ecosystems Mission Area, Natural Hazards Mission Area, Communications and Publishing
Background of coral reefs beneath waves. Overlaid with photo of smiling white woman with shoulder-length hair. Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)
Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)
Background of coral reefs beneath waves. Overlaid with photo of smiling white woman with shoulder-length hair.

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)

Research Oceanographer Kira Mizell studies changes in ocean chemistry by collecting marine minerals, looking for insights into past climate conditions and geologic history.

By
Ecosystems Mission Area, Natural Hazards Mission Area, Communications and Publishing
Background of coral reefs beneath waves. Overlaid with photo of smiling white woman with shoulder-length hair.

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)

Climate Science Champions, Season 2: Kira Mizell, Research Oceanographer (AD)

Research Oceanographer Kira Mizell studies changes in ocean chemistry by collecting marine minerals, looking for insights into past climate conditions and geologic history.

By
Ecosystems Mission Area, Natural Hazards Mission Area, Communications and Publishing
NOAA-USGS Stepping Stones 2021 Expedition
NOAA-USGS Stepping Stones 2021 Expedition

NOAA-USGS Stepping Stones 2021 Expedition

NOAA-USGS Stepping Stones 2021 Expedition

Join USGS researchers Jason Chaytor and Kira Mizell as they virtually participate in a NOAA Ocean Exploration expedition to the depths of the North Atlantic.

By
Natural Hazards, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

NOAA-USGS Stepping Stones 2021 Expedition

NOAA-USGS Stepping Stones 2021 Expedition

Join USGS researchers Jason Chaytor and Kira Mizell as they virtually participate in a NOAA Ocean Exploration expedition to the depths of the North Atlantic.

By
Natural Hazards, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center
Filter Total Items: 21

Marine minerals in Alaska — A review of coastal and deep-ocean regions

Minerals occurring in marine environments span the globe and encompass a broad range of mineral categories, forming within varied geologic and oceanographic settings. They occur in coastal regions, either from the continuation or mechanical reworking of terrestrial mineralization, as well as in the deep ocean, from diagenetic, hydrogenetic, and hydrothermal processes. The oceans cover most of the

Authors
Amy Gartman, Kira Mizell, Douglas C. Kreiner
By
Ecosystems Mission Area, Coastal and Marine Hazards and Resources Program, Alaska Science Center, Pacific Coastal and Marine Science Center, Marine Minerals Laboratory

Crystal chemistry of thallium in marine ferromanganese deposits

Our understanding of the up to 7 orders of magnitude partitioning of thallium (Tl) between seawater and ferromanganese (FeMn) deposits rests upon two foundations: (1) being able to quantify the Tl(I)/Tl(III) ratio that reflects the extent of the oxidative scavenging of Tl by vernadite (δ-MnO2), the principle manganate mineral in oxic and suboxic environments, and (2) being able to determine the so
Authors
Alain Manceau, Alexandre Simionovici, Nathaniel Findling, Pieter Glatzel, Blanka Detlefs, Anna V Wegorzewski, Kira Mizell, James R. Hein, Andrea Koschinsky
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Marine Minerals Laboratory, Deep Sea Exploration, Mapping and Characterization

Deep-ocean polymetallic nodules and cobalt-rich ferromanganese crusts in the global ocean: New sources for critical metals

The transition from a global hydrocarbon economy to a green energy economy and the rapidly growing middle class in developing countries are driving the need for considerable new sources of critical materials. Deep-ocean minerals, namely cobalt-rich ferromanganese crusts and polymetallic nodules, are two such new resources generating interest.Polymetallic nodules are essentially two-dimensional min
Authors
James R. Hein, Kira Mizell
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Marine Minerals Laboratory, Deep Sea Exploration, Mapping and Characterization

Estimates of metals contained in abyssal manganese nodules and ferromanganese crusts in the global ocean based on regional variations and genetic types of nodules

Deep-ocean ferromanganese crusts and manganese nodules are important marine repositories for global metals. Interest in these minerals as potential resources has led to detailed sampling in many regions of the global ocean, allowing for updated estimates of their global extent. Here, we present global estimates of total tonnage as well as contained metal concentrations and tonnages for ferromangan
Authors
Kira Mizell, James R. Hein, Manda Viola Au, Amy Gartman
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Marine Minerals Laboratory, Deep Sea Exploration, Mapping and Characterization

Geochemical insights into formation of enigmatic ironstones from Rio Grande rise, South Atlantic Ocean

Rio Grande Rise (RGR) is an intraplate oceanic elevation in the South Atlantic Ocean that formed at a hotspot on the Mid-Atlantic Ridge during the Cretaceous. In spreading center and hotspot environments, ironstones form mainly by biomineralization of reduced Fe from hydrothermal fluids or oxidation of sulfide deposits. However, RGR has been considered aseismic and volcanically inactive for the pa
Authors
Mariana Benites, James R. Hein, Kira Mizell, Kenneth A. Farley, Jonathon Treffkorn, Luigi Jovane
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Miocene phosphatization of rocks from the summit of Rio Grande Rise, Southwest Atlantic Ocean

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 87Sr/86Sr-determined carbonate fluorapatite (CFA) and calcite ages to investigate the paragenesis and history of phosphatization of carbonate sediments, limestones, ferromanganese crusts, and
Authors
Mariana Benites, James R. Hein, Kira Mizell, Luigi Jovane
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Ocean floor manganese deposits

Much of the dissolved Mn delivered to the oceans is slowly oxidized and precipitated alongside varying amounts of Fe into Mn and ferromanganese (FeMn) mineral deposits that occur extensively in the deep ocean wherever sediment accumulation is low and substrate is available. FeMn crusts grow as pavements on rock outcrops throughout the global ocean whereas nodules form as individual FeMn-encrusted
Authors
Kira Mizell, James R. Hein
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

The effects of phosphatization on the mineral associations and speciation of Pb in ferromanganese crusts

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 of phosphatization on individual trace metal concentrations, speciation, and phase associations in FeMn crusts remain poorly understood yet may be important to
Authors
Kira Mizell, James R. Hein, Andrea Koschinsky, Sarah M. Hayes
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Geology, Energy & Minerals Science Center, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Changes in sediment source areas to the Amerasia Basin, Arctic Ocean, over the past 5.5 million years based on radiogenic isotopes (Sr, Nd, Pb) of detritus from ferromanganese crusts

Ferromanganese (FeMn) crusts provide a useful paleoenvironmental archive for studying the poorly understood climatic, oceanographic, and geologic evolution of the Arctic Ocean. This study is based on the identification and temporal reconstruction of sources and inferred transport pathways of terrigenous material in FeMn crusts collected from several sites across the Amerasia Basin. Samples from th
Authors
Natalia Konstantinova, James R. Hein, Kira Mizell, Georgy Cherkashov, Brian Dreyer, Deborah Hutchinson
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Genesis and evolution of ferromanganese crusts from the summit of Rio Grande Rise, southwest Atlantic Ocean

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 investigate the chemical and mineralogical composition, growth rates and ages of initiation, and phosphatization of relatively shallow-water (650–825 m) Fe–Mn c
Authors
Mariana Benites, James R. Hein, Kira Mizell, Terrence Blackburn, Luigi Jovane
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Geographic and oceanographic influences on ferromanganese crust composition along a Pacific Ocean meridional transect, 14N to 14S

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 several seamounts or compare FeMn crusts from disparate areas of the global oceans. This study provides the first detailed research to address the geographic and ocea
Authors
Kira Mizell, James R. Hein, Phoebe J. Lam, Anthony A.P. Koppers, Hubert Staudigel
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Mineral phase-element associations based on sequential leaching of ferromanganese crusts, Amerasia Basin Arctic Ocean

Ferromanganese (FeMn) crusts from Mendeleev Ridge, Chukchi Borderland, and Alpha Ridge, in the Amerasia Basin, Arctic Ocean, are similar based on morphology and chemical composition. The crusts are characterized by a two- to four-layered stratigraphy. The chemical composition of the Arctic crusts differs significantly from hydrogenetic crusts from elsewhere of global ocean by high mean Fe/Mn ratio
Authors
Natalia Konstantinova, James R. Hein, Amy Gartman, Kira Mizell, Pedro Barrulas, Georgy Cherkashov, Pavel Mikhailik, Alexander Khanchuk
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Exploring the Unknown in the Deep North Atlantic Ocean

Exploring the Unknown in the Deep North Atlantic Ocean

Learning more about international waters, or the "high seas," and other unexplored deepwater areas through exploration is critical to ensuring they...

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Ferromanganese nodules on a deep-ocean seamount

Ferromanganese nodules on a deep-ocean seamount

USGS Pacific Coastal and Marine Science Center researcher Kira Mizell talks about the discovery of a ferromanganese nodule field on a seamount deep in...

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2021 North Atlantic Stepping Stones Expedition

2021 North Atlantic Stepping Stones Expedition

At 7 p.m. ET/4 p.m. PT on Wednesday, July 14, you are invited to join a live event introducing the 2021 North Atlantic Stepping Stones: New England...

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FeMn crust composition on seamounts in the west-central Pacific Ocean

FeMn crust composition on seamounts in the west-central Pacific Ocean

First detailed, large-scale study of parameters that control ferromanganese crust composition on seamounts in the west-central Pacific Ocean

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Dredging Up Clues to the Geologic History and Mineral Resources of the Rio Grande Rise, Southwest Atlantic Ocean

Dredging Up Clues to the Geologic History and Mineral Resources of the Rio Grande Rise, Southwest Atlantic Ocean

USGS scientists focused on finding iron-manganese crusts, whose chemistry reveals how the ocean has changed throughout millennia. The crusts also...

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Collecting clues to the geologic history and mineral resources of the Rio Grande Rise, southwest Atlantic Ocean

Collecting clues to the geologic history and mineral resources of the Rio Grande Rise, southwest Atlantic Ocean

USGS scientists James Hein and Kira Mizell participated in a University of São Paulo research cruise to the western Rio Grande Rise, an underwater...

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James Hein Wins Prestigious Moore Medal Award from the International Marine Minerals Society

James Hein Wins Prestigious Moore Medal Award from the International Marine Minerals Society

Research geologist is awarded for his 43-year scientific career dedicated to the study of marine minerals with the USGS.

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