Now showing items 295-314 of 1190

    • Distribution of recycled crust within the upper mantle : insights from the oxygen isotope composition of MORB from the Australian-Antarctic Discordance 

      Cooper, Kari M.; Eiler, John M.; Sims, Kenneth W. W.; Langmuir, Charles H. (American Geophysical Union, 2009-12-03)
      Geochemical heterogeneity within the mantle has long been recognized through the diversity of trace element and radiogenic isotopic compositions of mantle-derived rocks, yet the specific origin, abundance, and distribution ...
    • Diverse coral communities in naturally acidified waters of a Western Pacific reef 

      Shamberger, Kathryn E. F.; Cohen, Anne L.; Golbuu, Yimnang; McCorkle, Daniel C.; Lentz, Steven J.; Barkley, Hannah C. (John Wiley & Sons, 2014-01-16)
      Anthropogenic carbon dioxide emissions are acidifying the oceans, reducing the concentration of carbonate ions ([CO32−]) that calcifying organisms need to build and cement coral reefs. To date, studies of a handful of ...
    • Diverse styles of submarine venting on the ultraslow spreading Mid-Cayman Rise 

      German, Christopher R.; Bowen, Andrew D.; Coleman, Max; Honig, D. L.; Huber, Julie A.; Jakuba, Michael V.; Kinsey, James C.; Kurz, Mark D.; Leroy, S.; McDermott, Jill M.; Mercier de Lepinay, B.; Nakamura, Ko-ichi; Seewald, Jeffrey S.; Smith, J. L.; Sylva, Sean P.; Van Dover, Cindy L.; Whitcomb, Louis L.; Yoerger, Dana R. (2010-06-24)
      Thirty years after the first discovery of high-temperature submarine venting, the vast majority of the global Mid Ocean Ridge remains unexplored for hydrothermal activity. Of particular interest are the world’s ultra-slow ...
    • The diversity of sulfide oxidation and sulfate reduction genes expressed by the bacterial communities of the Cariaco Basin, Venezuela 

      Rodriguez-Mora, Maria J.; Edgcomb, Virginia P.; Taylor, Craig D.; Scranton, Mary I.; Taylor, Gordon T.; Chistoserdov, Andrei Y. (Bentham Open, 2016-08-31)
      Qualitative expression of dissimilative sulfite reductase (dsrA), a key gene in sulfate reduction, and sulfide:quinone oxidoreductase (sqr), a key gene in sulfide oxidation was investigated. Neither of the two could be ...
    • Domains of depleted mantle : new evidence from hafnium and neodymium isotopes 

      Salters, Vincent J. M.; Mallick, Soumen; Hart, Stanley R.; Langmuir, Charles H.; Stracke, Andreas (American Geophysical Union, 2011-08-02)
      Isotope systematics of basalts provide information on the distribution of mantle components and the length scale of mantle heterogeneity. To obtain this information, high data and sampling density are crucial. We present ...
    • Downward continued multichannel seismic refraction analysis of Atlantis Massif oceanic core complex, 30°N, Mid-Atlantic Ridge 

      Henig, A. S.; Blackman, Donna K.; Harding, Alistair J.; Canales, J. Pablo; Kent, Graham M. (American Geophysical Union, 2012-05-19)
      Detailed seismic refraction results show striking lateral and vertical variability of velocity structure within the Atlantis Massif oceanic core complex (OCC), contrasting notably with its conjugate ridge flank. Multichannel ...
    • Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, Mid-Atlantic Ridge 30°N 

      Blackman, Donna K.; Ildefonse, Benoit; John, Barbara E.; Ohara, Y.; Miller, D. J.; Abe, N.; Abratis, M.; Andal, E. S.; Andreani, Muriel; Awaji, S.; Beard, J. S.; Brunelli, D.; Charney, A. B.; Christie, D. M.; Collins, John A.; Delacour, A. G.; Delius, H.; Drouin, M.; Einaudi, F.; Escartin, Javier E.; Frost, B. R.; Fruh-Green, Gretchen L.; Fryer, P. B.; Gee, Jeffrey S.; Grimes, C. B.; Halfpenny, A.; Hansen, H.-E.; Harris, Amber C.; Tamura, A.; Hayman, Nicholas W.; Hellebrand, Eric; Hirose, T.; Hirth, Greg; Ishimaru, S.; Johnson, Kevin T. M.; Karner, G. D.; Linek, M.; MacLeod, Christopher J.; Maeda, J.; Mason, O..U.; McCaig, A. M.; Michibayashi, K.; Morris, Antony; Nakagawa, T.; Nozaka, T.; Rosner, Martin; Searle, Roger C.; Suhr, G.; Tominaga, Masako; von der Handt, A.; Yamasaki, T.; Zhao, Xixi (American Geophysical Union, 2011-07-19)
      Expeditions 304 and 305 of the Integrated Ocean Drilling Program cored and logged a 1.4 km section of the domal core of Atlantis Massif. Postdrilling research results summarized here constrain the structure and lithology ...
    • Drilling the oceanic lower crust and mantle : a global strategy for exploring the deep oceanic crust and mantle in the 1990's 

      Workshop on Drilling the Oceanic Lower Crust and Mantle (Woods Hole Oceanographic Institution, 1989-03)
      This workshop was convened to follow up on the Second Conference on Scientific Ocean Drilling (COSOD II) to devise a specific plan for deep crustal and mantle drilling over the next decade. Since COSOD II, however, there ...
    • Dynamic millennial-scale climate changes in the northwestern Pacific over the past 40,000 years 

      Chen, Min-Te; Lin, Xiaopei; Chang, Yuan-Pin; Chen, Y.-C.; Lo, L.; Shen, Chuan-Chou; Yokoyama, Yusuke; Oppo, Delia W.; Thompson, William G.; Zhang, Rong (American Geophysical Union, 2010-12-03)
      Ice core records of polar temperatures and greenhouse gases document abrupt millennial-scale oscillations that suggest the reduction or shutdown of thermohaline Circulation (THC) in the North Atlantic Ocean may induce the ...
    • Dynamic response of electromagnetic current meters 

      Aubrey, David G.; Spencer, Wayne D.; Trowbridge, John H. (Woods Hole Oceanographic Institution, 1984-05)
      The dynamic response of electromagnetic current meters (manufactured by Marsh-McBirney, Inc.) has been clarified through a comprehensive laboratory measurement program combined with a thorough literature review. ...
    • Dynamic triggering and earthquake swarms on East Pacific Rise transform faults 

      Cattania, Camilla; McGuire, Jeffrey J.; Collins, John A. (John Wiley & Sons, 2017-01-18)
      While dynamic earthquake triggering has been reported in several continental settings, offshore observations are rare. Oceanic transform faults share properties with continental geothermal areas known for dynamic triggering: ...
    • Dynamic triggering of creep events in the Salton Trough, Southern California by regional M≥5.4M≥5.4 earthquakes constrained by geodetic observations and numerical simulations 

      Wei, Meng; Liu, Yajing; Kaneko, Yoshihiro; McGuire, Jeffrey J.; Bilham, Roger (2015-06)
      Since a regional earthquake in 1951, shallow creep events on strike-slip faults within the Salton Trough, Southern California have been triggered at least 10 times by M ≥ 5.4 earthquakes within 200 km. The high earthquake ...
    • The dynamics of oceanic transform faults : constraints from geophysical, geochemical, and geodynamical modeling 

      Gregg, Patricia M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2008-06)
      Segmentation and crustal accretion at oceanic transform fault systems are investigated through a combination of geophysical data analysis and geodynamical and geochemical modeling. Chapter 1 examines the effect of fault ...
    • Early anthropogenic transformation of the Danube-Black Sea system 

      Giosan, Liviu; Coolen, Marco J. L.; Kaplan, Jed O.; Constantinescu, Stefan; Filip, Florin; Filipova-Marinova, Mariana; Kettner, Albert J.; Thom, Nick (Nature Publishing Group, 2012-08-30)
      Over the last century humans have altered the export of fluvial materials leading to significant changes in morphology, chemistry, and biology of the coastal ocean. Here we present sedimentary, paleoenvironmental and ...
    • Early exposure of bay scallops (Argopecten irradians) to high CO2 causes a decrease in larval shell growth 

      White, Meredith M.; McCorkle, Daniel C.; Mullineaux, Lauren S.; Cohen, Anne L. (Public Library of Science, 2013-04-15)
      Ocean acidification, characterized by elevated pCO2 and the associated decreases in seawater pH and calcium carbonate saturation state (Ω), has a variable impact on the growth and survival of marine invertebrates. Larval ...
    • Early Pliocene increase in thermohaline overturning : a precondition for the development of the modern equatorial Pacific cold tongue 

      Steph, Silke; Tiedemann, Ralf; Prange, Matthias; Groeneveld, Jeroen; Schulz, Michael; Timmermann, Axel; Nurnberg, Dirk; Ruhlemann, Carsten; Saukel, Cornelia; Haug, Gerald H. (American Geophysical Union, 2010-04-15)
      Unraveling the processes responsible for Earth's climate transition from an “El Niño–like state” during the warm early Pliocene into a modern-like “La Niña–dominated state” currently challenges the scientific community. ...
    • Earthquake behavior and structure of oceanic transform faults 

      Roland, Emily C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-02)
      Oceanic transform faults that accommodate strain at mid-ocean ridge offsets represent a unique environment for studying fault mechanics. Here, I use seismic observations and models to explore how fault structure affects ...
    • Earthquake scaling relations for mid-ocean ridge transform faults 

      Boettcher, Margaret S.; Jordan, T. H. (American Geophysical Union, 2004-12-09)
      A mid-ocean ridge transform fault (RTF) of length L, slip rate V, and moment release rate dot above M can be characterized by a seismic coupling coefficient χ = A E/A T, where A E ∼ dot above M/V is an effective seismic ...
    • Earthquake swarms driven by aseismic creep in the Salton Trough, California 

      Lohman, Rowena B.; McGuire, Jeffrey J. (American Geophysical Union, 2007-04-10)
      In late August 2005, a swarm of more than a thousand earthquakes between magnitudes 1 and 5.1 occurred at the Obsidian Buttes, near the southern San Andreas Fault. This swarm provides the best opportunity to date to assess ...
    • Earthquake swarms on transform faults 

      Roland, Emily C.; McGuire, Jeffrey J. (John Wiley & Sons, 2009-06-04)
      Swarm-like earthquake sequences are commonly observed in a diverse range of geological settings including volcanic and geothermal regions as well as along transform plate boundaries. They typically lack a clear mainshock, ...