Amy Gartman, PhD
I lead the USGS Global Marine Minerals project, which you can learn more about here. My work focuses on the geochemistry of marine minerals including all aspects of water-rock interactions such as precipitation, alteration, and the role of nanoparticles in mineral accumulation.
Science and Products
Geochemistry of ferromanganese crusts, nodules, and hydrothermally altered rocks from the Arctic Ocean Geochemistry of ferromanganese crusts, nodules, and hydrothermally altered rocks from the Arctic Ocean
Ferromanganese crusts, nodules, and hydrothermally altered rocks were collected via dredge within the Amerasia Basin in the Arctic Ocean during USCGC icebreaker Healy cruises HLY0805, HLY0905, and HLY1202 in 2008, 2009, and 2012 respectively. Dredged samples were donated and sent to USGS for subsampling and major and trace element geochemical analyses. Major and trace element data as...
Prospective regions for marine minerals on the Alaska Outer Continental Shelf 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...
Computed tomography (CT) scans, photographs, X-ray fluorescence (XRF) scans, geochemistry, X-ray diffraction (XRD), and gamma-ray bulk density data of push cores from Loki's Castle and Favne vent fields, Mohns Ridge Computed tomography (CT) scans, photographs, X-ray fluorescence (XRF) scans, geochemistry, X-ray diffraction (XRD), and gamma-ray bulk density data of push cores from Loki's Castle and Favne vent fields, Mohns Ridge
This data release contains computed tomography (CT) scans, photographs, X-ray fluorescence (XRF) scans, geochemical data, X-ray diffractograms (XRD), and gamma-ray bulk density of push cores and sediment subsamples from those cores collected in 2018 and 2019 from Loki’s and Favne Vent Fields, Mohns Ridge, part of the Arctic Mid-Atlantic Ridge. For the geochemical section of the release...
Marine mineral geochemical data - Part One: Pacific Ocean USGS-affiliated historical data 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
Measurements of zinc, oxygen, and pH, from sphalerite and ZnS oxidation in seawater Measurements of zinc, oxygen, and pH, from sphalerite and ZnS oxidation in seawater
This data release presents the concentration of zinc, oxygen, pH, temperature, and the time point at which measurements were taken for experimental oxidation work regarding zinc and copper sulfide minerals. These data accompany the following publication: Gartman, A., Whisman, S.P., and Hein, J.R., 2020, Interactive oxidation of sphalerite and covellite in seawater: implications for...
Filter Total Items: 25
Iron oxyhydroxide-rich hydrothermal deposits at the high-temperature Fåvne vent field, Mohns Ridge Iron oxyhydroxide-rich hydrothermal deposits at the high-temperature Fåvne vent field, Mohns Ridge
The recently discovered Fåvne vent field, located at 3,040 m depth on the slow-spreading Mohns mid-ocean ridge between Greenland and Norway, is a high-temperature (≥250°C) vent field that is characterized by Fe oxyhydroxide-rich and S-poor chimneys and mounds. The vent field is located on both the hanging wall and footwall of a normal fault with a ∼1.5 km throw that forms the western...
Authors
Caroline Gini, John Jamieson, Eoghan P. Reeves, Amy Gartman, Thibaut Barreyre, Michael G. Babechuk, Steffen L. Jorgensen, Katleen Robert
Hydrothermal plume fallout, mass wasting, and volcanic eruptions contribute to sediments at Loki’s Castle vent field, Mohns Ridge Hydrothermal plume fallout, mass wasting, and volcanic eruptions contribute to sediments at Loki’s Castle vent field, Mohns Ridge
Sediments surrounding hydrothermal vents are important transition spaces between hydrothermal and pelagic environments. These sediments accumulate through diverse processes that include water column plume fallout, volcanic ash deposition, and mass wasting of hydrothermal chimneys and mounds superimposed upon background sedimentation which may originate from pelagic, terrestrial, and...
Authors
Amy Gartman, Denise M Payan, Manda Viola Au, Eoghan P. Reeves, John Jamieson, Caroline Gini, Desiree Roerdink
Marine minerals in Alaska — A review of coastal and deep-ocean regions 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...
Authors
Amy Gartman, Kira Mizell, Douglas C. Kreiner
Estimates of metals contained in abyssal manganese nodules and ferromanganese crusts in the global ocean based on regional variations and genetic types of nodules 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
Authors
Kira Mizell, James R. Hein, Manda Viola Au, Amy Gartman
Extent of impact of deep-sea nodule mining midwater plumes is influenced by sediment loading, turbulence and thresholds Extent of impact of deep-sea nodule mining midwater plumes is influenced by sediment loading, turbulence and thresholds
Deep-sea polymetallic nodule mining research activity has substantially increased in recent years, but the expected level of environmental impact is still being established. One environmental concern is the discharge of a sediment plume into the midwater column. We performed a dedicated field study using sediment from the Clarion Clipperton Fracture Zone. The plume was monitored and...
Authors
Carlos Munoz-Royo, Thomas Peacock, Matthew Alford, Jerome Smith, Arnaud Le Boyer, Chinmay Kulkarni, Pierre Lermusiaux, Patrick Haley, C Mirabito, Dayang Wang, Eric Adams, Raphael Ouillon, Alexander Breugem, Boudewijn Decrop, Thijs Lanckreit, Rohit Supekar, Andrew Rzeznik, Amy Gartman, Se-Jong Ju
Carbonate-hosted microbial communities are prolific and pervasive methane oxidizers at geologically diverse marine methane seep sites Carbonate-hosted microbial communities are prolific and pervasive methane oxidizers at geologically diverse marine methane seep sites
At marine methane seeps, vast quantities of methane move through the shallow subseafloor, where it is largely consumed by microbial communities. This process plays an important role in global methane dynamics, but we have yet to identify all of the methane sinks in the deep sea. Here, we conducted a continental-scale survey of seven geologically diverse seafloor seeps and found that...
Authors
Jeffrey J. Marlow, Daniel Hoer, Sean Jungbluth, Linda Reynard, Amy Gartman, Marko S. Chavez, Mohamed Y. El-Naggar, Noreen Tuross, Victoria Orphan, Peter R. Girguis
Filter Total Items: 13
Science and Products
Geochemistry of ferromanganese crusts, nodules, and hydrothermally altered rocks from the Arctic Ocean Geochemistry of ferromanganese crusts, nodules, and hydrothermally altered rocks from the Arctic Ocean
Ferromanganese crusts, nodules, and hydrothermally altered rocks were collected via dredge within the Amerasia Basin in the Arctic Ocean during USCGC icebreaker Healy cruises HLY0805, HLY0905, and HLY1202 in 2008, 2009, and 2012 respectively. Dredged samples were donated and sent to USGS for subsampling and major and trace element geochemical analyses. Major and trace element data as...
Prospective regions for marine minerals on the Alaska Outer Continental Shelf 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...
Computed tomography (CT) scans, photographs, X-ray fluorescence (XRF) scans, geochemistry, X-ray diffraction (XRD), and gamma-ray bulk density data of push cores from Loki's Castle and Favne vent fields, Mohns Ridge Computed tomography (CT) scans, photographs, X-ray fluorescence (XRF) scans, geochemistry, X-ray diffraction (XRD), and gamma-ray bulk density data of push cores from Loki's Castle and Favne vent fields, Mohns Ridge
This data release contains computed tomography (CT) scans, photographs, X-ray fluorescence (XRF) scans, geochemical data, X-ray diffractograms (XRD), and gamma-ray bulk density of push cores and sediment subsamples from those cores collected in 2018 and 2019 from Loki’s and Favne Vent Fields, Mohns Ridge, part of the Arctic Mid-Atlantic Ridge. For the geochemical section of the release...
Marine mineral geochemical data - Part One: Pacific Ocean USGS-affiliated historical data 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
Measurements of zinc, oxygen, and pH, from sphalerite and ZnS oxidation in seawater Measurements of zinc, oxygen, and pH, from sphalerite and ZnS oxidation in seawater
This data release presents the concentration of zinc, oxygen, pH, temperature, and the time point at which measurements were taken for experimental oxidation work regarding zinc and copper sulfide minerals. These data accompany the following publication: Gartman, A., Whisman, S.P., and Hein, J.R., 2020, Interactive oxidation of sphalerite and covellite in seawater: implications for...
Filter Total Items: 25
Iron oxyhydroxide-rich hydrothermal deposits at the high-temperature Fåvne vent field, Mohns Ridge Iron oxyhydroxide-rich hydrothermal deposits at the high-temperature Fåvne vent field, Mohns Ridge
The recently discovered Fåvne vent field, located at 3,040 m depth on the slow-spreading Mohns mid-ocean ridge between Greenland and Norway, is a high-temperature (≥250°C) vent field that is characterized by Fe oxyhydroxide-rich and S-poor chimneys and mounds. The vent field is located on both the hanging wall and footwall of a normal fault with a ∼1.5 km throw that forms the western...
Authors
Caroline Gini, John Jamieson, Eoghan P. Reeves, Amy Gartman, Thibaut Barreyre, Michael G. Babechuk, Steffen L. Jorgensen, Katleen Robert
Hydrothermal plume fallout, mass wasting, and volcanic eruptions contribute to sediments at Loki’s Castle vent field, Mohns Ridge Hydrothermal plume fallout, mass wasting, and volcanic eruptions contribute to sediments at Loki’s Castle vent field, Mohns Ridge
Sediments surrounding hydrothermal vents are important transition spaces between hydrothermal and pelagic environments. These sediments accumulate through diverse processes that include water column plume fallout, volcanic ash deposition, and mass wasting of hydrothermal chimneys and mounds superimposed upon background sedimentation which may originate from pelagic, terrestrial, and...
Authors
Amy Gartman, Denise M Payan, Manda Viola Au, Eoghan P. Reeves, John Jamieson, Caroline Gini, Desiree Roerdink
Marine minerals in Alaska — A review of coastal and deep-ocean regions 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...
Authors
Amy Gartman, Kira Mizell, Douglas C. Kreiner
Estimates of metals contained in abyssal manganese nodules and ferromanganese crusts in the global ocean based on regional variations and genetic types of nodules 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
Authors
Kira Mizell, James R. Hein, Manda Viola Au, Amy Gartman
Extent of impact of deep-sea nodule mining midwater plumes is influenced by sediment loading, turbulence and thresholds Extent of impact of deep-sea nodule mining midwater plumes is influenced by sediment loading, turbulence and thresholds
Deep-sea polymetallic nodule mining research activity has substantially increased in recent years, but the expected level of environmental impact is still being established. One environmental concern is the discharge of a sediment plume into the midwater column. We performed a dedicated field study using sediment from the Clarion Clipperton Fracture Zone. The plume was monitored and...
Authors
Carlos Munoz-Royo, Thomas Peacock, Matthew Alford, Jerome Smith, Arnaud Le Boyer, Chinmay Kulkarni, Pierre Lermusiaux, Patrick Haley, C Mirabito, Dayang Wang, Eric Adams, Raphael Ouillon, Alexander Breugem, Boudewijn Decrop, Thijs Lanckreit, Rohit Supekar, Andrew Rzeznik, Amy Gartman, Se-Jong Ju
Carbonate-hosted microbial communities are prolific and pervasive methane oxidizers at geologically diverse marine methane seep sites Carbonate-hosted microbial communities are prolific and pervasive methane oxidizers at geologically diverse marine methane seep sites
At marine methane seeps, vast quantities of methane move through the shallow subseafloor, where it is largely consumed by microbial communities. This process plays an important role in global methane dynamics, but we have yet to identify all of the methane sinks in the deep sea. Here, we conducted a continental-scale survey of seven geologically diverse seafloor seeps and found that...
Authors
Jeffrey J. Marlow, Daniel Hoer, Sean Jungbluth, Linda Reynard, Amy Gartman, Marko S. Chavez, Mohamed Y. El-Naggar, Noreen Tuross, Victoria Orphan, Peter R. Girguis
Filter Total Items: 13