You have free access to this content

Geochemistry, Geophysics, Geosystems

Cover image for Geochemistry, Geophysics, Geosystems

Geochemistry, Geophysics, Geosystems

April 2011

Volume 12, Issue 4

    1. You have free access to this content
      Crustal structure across the central Alaska Range: Anatomy of a Mesozoic collisional zone

      Patrick R. K. Brennan, Hersh Gilbert and Kenneth D. Ridgway

      Article first published online: 30 APR 2011 | DOI: 10.1029/2011GC003519

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Crustal configuration of a suture zone
      • Juxtaposition of different types of crust in a collisional zone
      • Differences in crustal types in a collisional zone guide deformation
    2. You have free access to this content
      Seismicity during lateral dike propagation: Insights from new data in the recent Manda Hararo–Dabbahu rifting episode (Afar, Ethiopia)

      R. Grandin, E. Jacques, A. Nercessian, A. Ayele, C. Doubre, A. Socquet, D. Keir, M. Kassim, A. Lemarchand and G. C. P. King

      Article first published online: 27 APR 2011 | DOI: 10.1029/2010GC003434

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Horizontal migration of seismicity indicates lateral dike emplacement
      • Magma source is in the center of the segment, in analogy with mid-ocean ridges
      • Dike volumes and seismic energy release are sensitive to local tectonic stress
    3. You have free access to this content
      Anisotropic viscosity changes subduction zone thermal structure

      Einat Lev and Bradford H. Hager

      Article first published online: 26 APR 2011 | DOI: 10.1029/2010GC003382

      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Anisotropic viscosity changes the thermal structure of subduction zone wedges
      • Anisotropic viscosity leads to time variability of flow and melt in the wedge
      • Anisotropic viscosity leads to a hotter slab-wedge interface
    4. You have free access to this content
      Comparison of frictional strength and velocity dependence between fault zones in the Nankai accretionary complex

      Matt J. Ikari and Demian M. Saffer

      Article first published online: 26 APR 2011 | DOI: 10.1029/2010GC003442

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • All three fault zones are clay rich, weak, and velocity strengthening
      • Shallow fault zones have a propensity for slow slip
      • Frictional strength differences can explain differences in prism structure
    5. You have free access to this content
      Temperature and vital effect controls on bamboo coral (Isididae) isotope geochemistry: A test of the “lines method”

      T. M. Hill, H. J. Spero, T. Guilderson, M. LaVigne, D. Clague, S. Macalello and N. Jang

      Article first published online: 26 APR 2011 | DOI: 10.1029/2010GC003443

      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Bamboo corals live for hundreds of years
      • Bamboo corals display significant isotopic fractionation
      • Lines method can be used to estimate temperature
    6. You have free access to this content
    7. You have free access to this content
      Development of a low-temperature insert for the measurement of remanent magnetization direction using superconducting quantum interference device rock magnetometers

      Aleksey V. Smirnov and John A. Tarduno

      Article first published online: 21 APR 2011 | DOI: 10.1029/2011GC003517

      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • A new device for full magnetization vector measurements at low temperatures
      • Novel data on the magnetization vector behavior during low-temperature cycling
      • The results show a great potential of directional low-temperature magnetometry
    8. You have free access to this content
      Implementation and application of adaptive mesh refinement for thermochemical mantle convection studies

      Wei Leng and Shijie Zhong

      Article first published online: 15 APR 2011 | DOI: 10.1029/2010GC003425

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Implement the adaptive mesh refinement into 2-D mantle convection code
      • Incorporate particle method with adaptive mesh refinement
      • Study the thermochemical entrainment problem with adaptive mesh refinement code
    9. You have free access to this content
      The steeply subducting edge of the Cocos Ridge: Evidence from receiver functions beneath the northern Talamanca Range, south-central Costa Rica

      Y. Dzierma, W. Rabbel, M. M. Thorwart, E. R. Flueh, M. M. Mora and G. E. Alvarado

      Article first published online: 13 APR 2011 | DOI: 10.1029/2010GC003477

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Receiver function analysis of south-central Costa Rica
      • Steep subduction under northern flank of Cordillera de Talamanca
      • Confirmed by finite difference modeling
    10. You have free access to this content
      Influence of temperature variations on the noise level of the data of the LaCoste and Romberg Earth tide gravity meter ET18

      Anne Hegewald, Gerhard Jentzsch and Thomas Jahr

      Article first published online: 8 APR 2011 | DOI: 10.1029/2010GC003432

      • image
      • image
      • image
      • image
      • image

      Key Points

      • Influence of the temperature variations as noise signal in the gravity records
      • 215 day time series of the ET18 and superconducting gravimeters were compared
      • In temperature-stabilized room a high data quality of ET18 can be achieved
    11. You have free access to this content
      Acoustic and mechanical properties of Nankai accretionary prism core samples

      Hugues Raimbourg, Yozo Hamano, Saneatsu Saito, Masataka Kinoshita and Achim Kopf

      Article first published online: 7 APR 2011 | DOI: 10.1029/2010GC003169

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
    12. You have free access to this content
      Coupled isotopic systematics of surface cerium and neodymium in the Pacific Ocean

      H. Tazoe, H. Obata and T. Gamo

      Article first published online: 7 APR 2011 | DOI: 10.1029/2010GC003342

      • image
      • image
      • image
      • image
      • image

      Key Points

      • Ce supplied and scavenged by particle-dissolved interaction
    13. You have free access to this content
      Growth of borehole breakouts with time after drilling: Implications for state of stress, NanTroSEIZE transect, SW Japan

      J. Casey Moore, Chandong Chang, Lisa McNeill, Moe Kyaw Thu, Yasuhiro Yamada and Gary Huftile

      Article first published online: 5 APR 2011 | DOI: 10.1029/2010GC003417

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Breakouts widen over hours to days after initial imaging minutes after drilling
      • Underestimated width equals underestimated stress magnitudes
      • Underestimated stress magnitude can under predict tendency for thrust faulting
    14. You have free access to this content
      Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica

      Yair Rosenthal, Audrey Morley, Christine Barras, Miriam E. Katz, Frans Jorissen, Gert-Jan Reichart, Delia W. Oppo and Braddock K. Linsley

      Article first published online: 1 APR 2011 | DOI: 10.1029/2010GC003333

      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • Mg/Ca temperature calibration in H. balthica
    15. You have free access to this content
      Topography, the geoid, and compensation mechanisms for the southern Rocky Mountains

      D. Coblentz, C. G. Chase, K. E. Karlstrom and J. van Wijk

      Article first published online: 1 APR 2011 | DOI: 10.1029/2010GC003459

      • image
      • image
      • image
      • image
      • image
      • image
      • image
      • image

      Key Points

      • The buoyancy that has driven uplift in the Rockies is shallow
      • The coherence between the geoid and topography is high for most wavelengths
      • Both crustal thickening and mantle lithospheric thinning are important
    16. You have free access to this content

SEARCH

SEARCH BY CITATION