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Hope L. Ianiri, Ph.D. (Former Employee)

Science and Products

Sedimentary geochemistry data from the Galápagos Spreading Center, sampled Aug-Nov 2023 Sedimentary geochemistry data from the Galápagos Spreading Center, sampled Aug-Nov 2023

This data release includes geochemistry data collected from sediments, sediment pore fluids, and high temperature hydrothermal vent fluids from the Galápagos Spreading Center. Samples were collected from Aug - Nov 2023. Data types include total carbon and nitrogen content, carbon and nitrogen stable isotopes, dissolved iron concentrations, and lipid biomarker concentrations.
By
Pacific Coastal and Marine Science Center

Sedimentary organic geochemistry data from Escanaba Trough, off the coast of northern California, collected May-June 2022 Sedimentary organic geochemistry data from Escanaba Trough, off the coast of northern California, collected May-June 2022

This data release presents organic geochemical data collected from sediments within the Escanaba Trough, a sedimented hydrothermal spreading center within the U.S. EEZ off the coast of Northern CA which contains marine minerals (USGS Field Activity 2022-621-FA). The data includes total organic carbon and total nitrogen content, stable and radioisotopes, compound specific biomarker data...
By
Pacific Coastal and Marine Science Center
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough" Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"
Characterizing organic carbon at Escanaba Trough
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"

Characterizing organic carbon at Escanaba Trough

Characterizing organic carbon at Escanaba Trough

The global ocean is a significant carbon sink, absorbing about a third of all atmospheric carbon dioxide (CO2) emissions (Gruber et al., 2019).

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"

Characterizing organic carbon at Escanaba Trough

Characterizing organic carbon at Escanaba Trough

The global ocean is a significant carbon sink, absorbing about a third of all atmospheric carbon dioxide (CO2) emissions (Gruber et al., 2019).

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough" Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"
Characterizing organic carbon at Escanaba Trough (AD)
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"

Characterizing organic carbon at Escanaba Trough (AD)

Characterizing organic carbon at Escanaba Trough (AD)

The global ocean is a significant carbon sink, absorbing about a third of all atmospheric carbon dioxide (CO2) emissions (Gruber et al., 2019).

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"

Characterizing organic carbon at Escanaba Trough (AD)

Characterizing organic carbon at Escanaba Trough (AD)

The global ocean is a significant carbon sink, absorbing about a third of all atmospheric carbon dioxide (CO2) emissions (Gruber et al., 2019).

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Spontaneous combustion of metal sulfide minerals and implications for seafloor massive sulfide mining Spontaneous combustion of metal sulfide minerals and implications for seafloor massive sulfide mining

Metal sulfide minerals are abundant phases in many environments on earth, including seafloor massive sulfide (SMS) deposits, which occur at hydrothermal vents throughout the global ocean. These deep-sea settings are currently undergoing exploration for potential future mining. Here, we describe rocks from Escanaba Trough on the southern Gorda Ridge that underwent spontaneous combustion...
Authors
Amy Gartman, Jaycee Favela, Katlin Bowman Adamczyk, Aude Picard, John Jamieson, Rob Zierenberg, Isobel A. Yeo, Karen Bustillo, I. Maru Shapiro, Kha Cam Phan, Hope Lee Ianiri
By
Pacific Coastal and Marine Science Center

Cruise summary—Samoa Basin abyssal mapping—Box coring leg, Pago Pago, Territory of American Samoa to Pago Pago, American Samoa, April 11– May 1, 2026 Cruise summary—Samoa Basin abyssal mapping—Box coring leg, Pago Pago, Territory of American Samoa to Pago Pago, American Samoa, April 11– May 1, 2026

Authors
Amy Gartman, Katlin Bowman Adamczyk, Jason A. Addison, Jill R. Bourque, Beth E. Caissie, Caroline Sarah Caron, Amanda W. Demopoulos, Jaycee Favela, Hope Lee Ianiri, Daniel Charles Powers, Nancy G. Prouty, Jane Anne Rudebusch, Isabelle M. Shapiro
By
Ecosystems Land Change Science Program, Pacific Coastal and Marine Science Center

Samoa basin abyssal mapping: Box coring leg Samoa basin abyssal mapping: Box coring leg

This cruise report describes work from leg three of the NOAA American Samoa Abyssal Mapping effort, OPR-T900-KR-26. Leg one preceded this effort and collected ship-based acoustic data. Leg two collected autonomous underwater vehicle (AUV) data and began before, continued contemporaneously, and finished subsequently to leg three. The USGS field activity number assigned to this expedition...
Authors
Amy Gartman, Katlin Bowman Adamczyk, Jason A. Addison, Jill Bourque, Beth E. Caissie, Caroline Sarah Caron, Amanda J. Demopoulos, Jaycee Favela, Hope Lee Ianiri, Daniel Charles Powers, Nancy G. Prouty, Jane Anne Rudebusch, Isabelle M. Shapiro
By
Pacific Coastal and Marine Science Center
Deep-sea sulfide minerals can spontaneously heat and combust when exposed to air

Deep-sea sulfide minerals can spontaneously heat and combust when exposed to air

Findings from Escanaba Trough, a seafloor spreading center offshore of the Oregon/California border, highlight a potential hazard that could merit...

Read Article
Hawaiʻi Abyssal Nodules and Associated Ecosystems Expedition

Hawaiʻi Abyssal Nodules and Associated Ecosystems Expedition

In Fall 2025 the Hawaiʻi Abyssal Nodules and Associated Ecosystems Expedition, led by USGS scientists, will investigate the geology, minerals, and...

Read Article
Characterizing Organic Carbon Cycling at a Seafloor Spreading Center

Characterizing Organic Carbon Cycling at a Seafloor Spreading Center

New research from USGS characterizes organic carbon cycling in deep-sea sediments collected at Escanaba Trough, a unique seafloor spreading area which...

Read Article
USGS Researchers Return to Eastern Galapágos Spreading Center

USGS Researchers Return to Eastern Galapágos Spreading Center

A research team including USGS scientists returned to the Eastern Galapágos Spreading Center to investigate its deep-sea hydrothermal vents, where...

Read Article

Science and Products

Sedimentary geochemistry data from the Galápagos Spreading Center, sampled Aug-Nov 2023 Sedimentary geochemistry data from the Galápagos Spreading Center, sampled Aug-Nov 2023

This data release includes geochemistry data collected from sediments, sediment pore fluids, and high temperature hydrothermal vent fluids from the Galápagos Spreading Center. Samples were collected from Aug - Nov 2023. Data types include total carbon and nitrogen content, carbon and nitrogen stable isotopes, dissolved iron concentrations, and lipid biomarker concentrations.
By
Pacific Coastal and Marine Science Center

Sedimentary organic geochemistry data from Escanaba Trough, off the coast of northern California, collected May-June 2022 Sedimentary organic geochemistry data from Escanaba Trough, off the coast of northern California, collected May-June 2022

This data release presents organic geochemical data collected from sediments within the Escanaba Trough, a sedimented hydrothermal spreading center within the U.S. EEZ off the coast of Northern CA which contains marine minerals (USGS Field Activity 2022-621-FA). The data includes total organic carbon and total nitrogen content, stable and radioisotopes, compound specific biomarker data...
By
Pacific Coastal and Marine Science Center
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough" Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"
Characterizing organic carbon at Escanaba Trough
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"

Characterizing organic carbon at Escanaba Trough

Characterizing organic carbon at Escanaba Trough

The global ocean is a significant carbon sink, absorbing about a third of all atmospheric carbon dioxide (CO2) emissions (Gruber et al., 2019).

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"

Characterizing organic carbon at Escanaba Trough

Characterizing organic carbon at Escanaba Trough

The global ocean is a significant carbon sink, absorbing about a third of all atmospheric carbon dioxide (CO2) emissions (Gruber et al., 2019).

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough" Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"
Characterizing organic carbon at Escanaba Trough (AD)
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"

Characterizing organic carbon at Escanaba Trough (AD)

Characterizing organic carbon at Escanaba Trough (AD)

The global ocean is a significant carbon sink, absorbing about a third of all atmospheric carbon dioxide (CO2) emissions (Gruber et al., 2019).

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Image of a deep-sea sulfide mound at Escanaba Trough with the text "Characterizing organic carbon at Escanaba Trough"

Characterizing organic carbon at Escanaba Trough (AD)

Characterizing organic carbon at Escanaba Trough (AD)

The global ocean is a significant carbon sink, absorbing about a third of all atmospheric carbon dioxide (CO2) emissions (Gruber et al., 2019).

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Spontaneous combustion of metal sulfide minerals and implications for seafloor massive sulfide mining Spontaneous combustion of metal sulfide minerals and implications for seafloor massive sulfide mining

Metal sulfide minerals are abundant phases in many environments on earth, including seafloor massive sulfide (SMS) deposits, which occur at hydrothermal vents throughout the global ocean. These deep-sea settings are currently undergoing exploration for potential future mining. Here, we describe rocks from Escanaba Trough on the southern Gorda Ridge that underwent spontaneous combustion...
Authors
Amy Gartman, Jaycee Favela, Katlin Bowman Adamczyk, Aude Picard, John Jamieson, Rob Zierenberg, Isobel A. Yeo, Karen Bustillo, I. Maru Shapiro, Kha Cam Phan, Hope Lee Ianiri
By
Pacific Coastal and Marine Science Center

Cruise summary—Samoa Basin abyssal mapping—Box coring leg, Pago Pago, Territory of American Samoa to Pago Pago, American Samoa, April 11– May 1, 2026 Cruise summary—Samoa Basin abyssal mapping—Box coring leg, Pago Pago, Territory of American Samoa to Pago Pago, American Samoa, April 11– May 1, 2026

Authors
Amy Gartman, Katlin Bowman Adamczyk, Jason A. Addison, Jill R. Bourque, Beth E. Caissie, Caroline Sarah Caron, Amanda W. Demopoulos, Jaycee Favela, Hope Lee Ianiri, Daniel Charles Powers, Nancy G. Prouty, Jane Anne Rudebusch, Isabelle M. Shapiro
By
Ecosystems Land Change Science Program, Pacific Coastal and Marine Science Center

Samoa basin abyssal mapping: Box coring leg Samoa basin abyssal mapping: Box coring leg

This cruise report describes work from leg three of the NOAA American Samoa Abyssal Mapping effort, OPR-T900-KR-26. Leg one preceded this effort and collected ship-based acoustic data. Leg two collected autonomous underwater vehicle (AUV) data and began before, continued contemporaneously, and finished subsequently to leg three. The USGS field activity number assigned to this expedition...
Authors
Amy Gartman, Katlin Bowman Adamczyk, Jason A. Addison, Jill Bourque, Beth E. Caissie, Caroline Sarah Caron, Amanda J. Demopoulos, Jaycee Favela, Hope Lee Ianiri, Daniel Charles Powers, Nancy G. Prouty, Jane Anne Rudebusch, Isabelle M. Shapiro
By
Pacific Coastal and Marine Science Center
Deep-sea sulfide minerals can spontaneously heat and combust when exposed to air

Deep-sea sulfide minerals can spontaneously heat and combust when exposed to air

Findings from Escanaba Trough, a seafloor spreading center offshore of the Oregon/California border, highlight a potential hazard that could merit...

Read Article
Hawaiʻi Abyssal Nodules and Associated Ecosystems Expedition

Hawaiʻi Abyssal Nodules and Associated Ecosystems Expedition

In Fall 2025 the Hawaiʻi Abyssal Nodules and Associated Ecosystems Expedition, led by USGS scientists, will investigate the geology, minerals, and...

Read Article
Characterizing Organic Carbon Cycling at a Seafloor Spreading Center

Characterizing Organic Carbon Cycling at a Seafloor Spreading Center

New research from USGS characterizes organic carbon cycling in deep-sea sediments collected at Escanaba Trough, a unique seafloor spreading area which...

Read Article
USGS Researchers Return to Eastern Galapágos Spreading Center

USGS Researchers Return to Eastern Galapágos Spreading Center

A research team including USGS scientists returned to the Eastern Galapágos Spreading Center to investigate its deep-sea hydrothermal vents, where...

Read Article
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