Recent Submissions

  • Limited mantle hydration by bending faults at the Middle America Trench 

    Miller, Nathaniel C.; Lizarralde, Daniel; Collins, John A.; Holbrook, W. Steven; Van Avendonk, Harm J. A. (American Geophysical Union, 2020-12-15)
    Seismic anisotropy measurements show that upper mantle hydration at the Middle America Trench (MAT) is limited to serpentinization and/or water in fault zones, rather than distributed uniformly. Subduction of hydrated ...
  • Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight 

    Garcia-Tigreros, Fenix; Leonte, Mihai; Ruppel, Carolyn D.; Ruiz-Angulo, Angel; Joung, DongJoo; Young, Benjamin; Kessler, John D. (American Geophysical Union, 2020-12-23)
    Ongoing ocean warming can release methane (CH4) currently stored in ocean sediments as free gas and gas hydrates. Once dissolved in ocean waters, this CH4 can be oxidized to carbon dioxide (CO2). While it has been hypothesized ...
  • Ideas and perspectives: a strategic assessment of methane and nitrous oxide measurements in the marine environment 

    Wilson, Samuel T.; Al-Haj, Alia N.; Bourbonnais, Annie; Frey, Claudia; Fulweiler, Robinson W.; Kessler, John D.; Marchant, Hannah K.; Milucka, Jana; Ray, Nicholas E.; Suntharalingam, Parvadha; Thornton, Brett F.; Upstill-Goddard, Robert C.; Weber, Thomas S.; Arévalo-Martínez, Damian L.; Bange, Hermann W.; Benway, Heather M.; Bianchi, Daniele; Borges, Alberto V.; Chang, Bonnie X.; Crill, Patrick M.; del Valle, Daniela A.; Farías, Laura; Joye, Samantha B.; Kock, Annette; Labidi, Jabrane; Manning, Cara C.; Pohlman, John W.; Rehder, Gregor; Sparrow, Katy J.; Tortell, Philippe D.; Treude, Tina; Valentine, David L.; Ward, Bess B.; Yang, Simon; Yurganov, Leonid N. (European Geosciences Union, 2020-11-26)
    In the current era of rapid climate change, accurate characterization of climate-relevant gas dynamics – namely production, consumption, and net emissions – is required for all biomes, especially those ecosystems most ...
  • Along-margin variations in breakup volcanism at the Eastern North American Margin 

    Greene, John A.; Tominaga, Masako; Miller, Nathaniel C. (American Geophysical Union, 2020-11-16)
    We model the magnetic signature of rift‐related volcanism to understand the distribution and volume of magmatic activity that occurred during the breakup of Pangaea and early Atlantic opening at the Eastern North American ...
  • The role of premagmatic rifting in shaping a volcanic continental margin: An example from the Eastern North American Margin 

    Lang, Guy; ten Brink, Uri S.; Hutchinson, Deborah R.; Mountain, Gregory; Schattner, Uri (American Geophysical Union, 2020-10-12)
    Both magmatic and tectonic processes contribute to the formation of volcanic continental margins. Such margins are thought to undergo extension across a narrow zone of lithospheric thinning (~100 km). New observations based ...
  • Focused fluid flow and methane venting along the Queen Charlotte fault, offshore Alaska (USA) and British Columbia (Canada) 

    Prouty, Nancy G.; Brothers, Daniel S.; Kluesner, Jared W.; Barrie, J. Vaughn; Andrews, Brian D.; Lauer, Rachel M.; Greene, H. Gary; Conrad, James E.; Lorenson, Thomas D.; Law, Michael D.; Sahy, Diana; Conway, Kim; McGann, Mary L.; Dartnell, Peter (Geological Society of America, 2020-11-02)
    Fluid seepage along obliquely deforming plate boundaries can be an important indicator of crustal permeability and influence on fault-zone mechanics and hydrocarbon migration. The ∼850-km-long Queen Charlotte fault (QCF) ...
  • Timescales and processes of methane hydrate formation and breakdown, with application to geologic systems 

    Ruppel, Carolyn D.; Waite, William F. (American Geophysical Union, 2020-06-04)
    Gas hydrate is an ice‐like form of water and low molecular weight gas stable at temperatures of roughly −10°C to 25°C and pressures of ~3 to 30 MPa in geologic systems. Natural gas hydrates sequester an estimated one sixth ...
  • Numerical characterization of cohesive and non-cohesive 'sediments' under different consolidation states using 3D DEM triaxial experiments 

    Elyashiv, Hadar; Bookman, Revital; Siemann, Lennart; ten Brink, Uri S.; Huhn, Katrin (MDPI, 2020-10-05)
    The Discrete Element Method has been widely used to simulate geo-materials due to time and scale limitations met in the field and laboratories. While cohesionless geo-materials were the focus of many previous studies, the ...
  • Focused fluid flow along the Nootka fault zone and continental slope, explorer-Juan de Fuca Plate Boundary 

    Riedel, Michael; Rohr, Kristin Marie Michener; Spence, George D.; Kelley, Deborah S.; Delaney, John R.; Lapham, Laura L.; Pohlman, John W.; Hyndman, Roy D.; Willoughby, Ele C. (American Geophysical Union, 2020-08-07)
    Geophysical and geochemical data indicate there is abundant fluid expulsion in the Nootka fault zone (NFZ) between the Juan de Fuca and Explorer plates and the Nootka continental slope. Here we combine observations from ...
  • Gas hydrates in sustainable chemistry 

    Hassanpouryouzband, Aliakbar; Joonaki, Edris; Farahani, Mehrdad Vasheghani; Takeya, Satoshi; Ruppel, Carolyn D.; Yang, Jinhai; English, Niall J.; Schicks, Judith M.; Edlmann, Katriona; Mehrabian, Hadi; Aman, Zachary M.; Tohidia, Bahman (Royal Society of Chemistry, 2020-06-22)
    Gas hydrates have received considerable attention due to their important role in flow assurance for the oil and gas industry, their extensive natural occurrence on Earth and extraterrestrial planets, and their significant ...
  • Surface methane concentrations along the mid-Atlantic bight driven by aerobic subsurface production rather than seafloor gas seeps. 

    Leonte, Mihai; Ruppel, Carolyn D.; Ruiz-Angulo, Angel; Kessler, John D. (American Geophysical Union, 2020-04-04)
    Relatively minor amounts of methane, a potent greenhouse gas, are currently emitted from the oceans to the atmosphere, but such methane emissions have been hypothesized to increase as oceans warm. Here, we investigate the ...
  • Semi-automated bathymetric spectral decomposition delineates the impact of mass wasting on the morphological evolution of the continental slope, offshore Israel 

    Gadol, Omri; Tibor, Gideon; ten Brink, Uri S.; Hall, John K.; Groves‐Gidney, Gavrielle; Bar‐Am, Gideon; Hübscher, Christian; Makovsky, Yizhaq (Wiley, 2019-10-31)
    Understanding continental‐slope morphological evolution is essential for predicting basin deposition. However, separating the imprints and chronology of different seafloor shaping processes is difficult. This study explores ...
  • Introduction to special issue on gas hydrate in porous media: linking laboratory and field-scale phenomena 

    Ruppel, Carolyn D.; Lee, Joo Yong; Pecher, Ingo A. (American Geophysical Union, 2019-07-10)
    The proliferation of drilling expeditions focused on characterizing natural gas hydrate as a potential energy resource has spawned widespread interest in gas hydrate reservoir properties and associated porous media phenomena. ...
  • Heat flow in the Western Arctic Ocean (Amerasian Basin) 

    Ruppel, Carolyn D.; Lachenbruch, Arthur H.; Hutchinson, Deborah R.; Munroe, Robert J.; Mosher, David C. (American Geophysical Union, 2019-07-10)
    From 1963 to 1973 the U.S. Geological Survey measured heat flow at 356 sites in the Amerasian Basin (Western Arctic Ocean) from a drifting ice island (T‐3). The resulting measurements, which are unevenly distributed on ...
  • Submarine permafrost map in the arctic modeled using 1-D transient heat flux (SuPerMAP) 

    Overduin, Pier Paul; Schneider von Deimling, T.; Miesner, Frederieke; Grigoriev, Mikhail N.; Ruppel, Carolyn D.; Vasiliev, Alexander; Lantuit, Hugues; Juhls, Bennet; Westermann, Sebastian (American Geophysical Union, 2019-04-17)
    Offshore permafrost plays a role in the global climate system, but observations of permafrost thickness, state, and composition are limited to specific regions. The current global permafrost map shows potential offshore ...
  • Xenon hydrate as an analog of methane hydrate in geologic systems out of thermodynamic equilibrium 

    Fu, Xiaojing; Waite, William F.; Cueto‐Felgueroso, Luis; Juanes, Ruben (American Geophysical Union, 2019-05-06)
    Methane hydrate occurs naturally under pressure and temperature conditions that are not straightforward to replicate experimentally. Xenon has emerged as an attractive laboratory alternative to methane for studying hydrate ...
  • Offshore landslide hazard curves from mapped landslide size distributions 

    Geist, Eric L.; ten Brink, Uri S. (American Geophysical Union, 2019-04-01)
    We present a method to calculate landslide hazard curves along offshore margins based on size distributions of submarine landslides. The method utilizes 10 different continental margins that were mapped by high‐resolution ...
  • Hydrologic controls of methane dynamics in Karst subterranean estuaries 

    Brankovits, David; Pohlman, John W.; Ganju, Neil K.; Iliffe, Thomas; Lowell, Nick; Roth, Erich; Sylva, Sean P.; Emmert, Jake; Lapham, Laura L. (American Geophysical Union, 2018-11-09)
    Karst subterranean estuaries (KSEs) extend into carbonate platforms along 12% of all coastlines. A recent study has shown that microbial methane (CH4) consumption is an important component of the carbon cycle and food web ...
  • Azimuthal seismic anisotropy of 70-ma Pacific-plate upper mantle. 

    Mark, Hannah; Lizarralde, Daniel; Collins, John; Miller, Nathaniel C.; Hirth, Greg; Gaherty, James B.; Evans, Rob L. (American Geophysical Union, 2019-01-28)
    Plate formation and evolution processes are predicted to generate upper mantle seismic anisotropy and negative vertical velocity gradients in oceanic lithosphere. However, predictions for upper mantle seismic velocity ...
  • Geomorphic process fingerprints in submarine canyons 

    Brothers, Daniel S.; ten Brink, Uri S.; Andrews, Brian D.; Chaytor, Jason D.; Twichell, David C. (Elsevier, 2013-02-07)
    Submarine canyons are common features of continental margins worldwide. They are conduits that funnel vast quantities of sediment from the continents to the deep sea. Though it is known that submarine canyons form primarily ...

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