4. Solid earth sciences

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  1. Research article

    Determination of temporal changes in seismic velocity caused by volcanic activity in and around Hakone volcano, central Japan, using ambient seismic noise records

    Autocorrelation functions (ACFs) for ambient seismic noise are considered to be useful tools for estimating temporal changes in the subsurface structure. Velocity changes at Hakone volcano in central Japan, wh...

    Yohei Yukutake, Tomotake Ueno and Kazuki Miyaoka

    Progress in Earth and Planetary Science 2016 3:29

    Published on: 27 September 2016

  2. Research article

    A record of the upper Olduvai geomagnetic polarity transition from a sediment core in southern Yokohama City, Pacific side of central Japan

    A detailed paleomagnetic record of the upper Olduvai polarity transition was obtained from a 106.72 m-long sediment core drilled in southern Yokohama City, located on the northern Miura Peninsula, on the Pacif...

    Chie Kusu, Makoto Okada, Atsushi Nozaki, Ryuichi Majima and Hideki Wada

    Progress in Earth and Planetary Science 2016 3:26

    Published on: 23 September 2016

  3. Research article

    Major element composition of an Early Enriched Reservoir: constraints from 142Nd/144Nd isotope systematics in the early Earth and high-pressure melting experiments of a primitive peridotite

    The Accessible Silicate Earth (ASE) has a higher 142Nd/144Nd ratio than most chondrites. Thus, if the Earth is assumed to have formed from these chondrites, a complement low-142Nd/144Nd reservoir is needed. Such ...

    Nozomi Kondo, Takashi Yoshino, Kyoko N. Matsukage and Tetsu Kogiso

    Progress in Earth and Planetary Science 2016 3:25

    Published on: 22 August 2016

  4. Research article

    Ultrahigh-pressure acoustic wave velocities of SiO2-Al2O3 glasses up to 200 GPa

    Extensive experimental studies on the structure and density of silicate glasses as laboratory analogs of natural silicate melts have attempted to address the nature of dense silicate melts that may be present ...

    Itaru Ohira, Motohiko Murakami, Shinji Kohara, Koji Ohara and Eiji Ohtani

    Progress in Earth and Planetary Science 2016 3:18

    Published on: 29 June 2016

  5. Research article

    Unit cell determination of coexisting post-perovskite and H-phase in (Mg,Fe)SiO3 using multigrain XRD: compositional variation across a laser heating spot at 119 GPa

    Multigrain X-ray diffraction (XRD) can be used to accurately calculate the unit cell parameters of individual mineral phases in a mineral assemblage contained in a diamond anvil cell (DAC). Coexisting post-per...

    Li Zhang, Yue Meng and Ho-kwang Mao

    Progress in Earth and Planetary Science 2016 3:13

    Published on: 12 May 2016

  6. Review

    Mantle hydration and Cl-rich fluids in the subduction forearc

    In the forearc region, aqueous fluids are released from the subducting slab at a rate depending on its thermal state. Escaping fluids tend to rise vertically unless they meet permeability barriers such as the ...

    Bruno Reynard

    Progress in Earth and Planetary Science 2016 3:9

    Published on: 28 April 2016

  7. Research article

    Sound velocities of bridgmanite from density of states determined by nuclear inelastic scattering and first-principles calculations

    Sound velocities of bridgmanite measured in the laboratory are a key to deciphering the composition of the lower mantle. Here, we report Debye sound velocities determined using nuclear inelastic scattering (NI...

    Catherine McCammon, Razvan Caracas, Konstantin Glazyrin, Vasily Potapkin, Anastasia Kantor, Ryosuke Sinmyo, Clemens Prescher, Ilya Kupenko, Aleksandr Chumakov and Leonid Dubrovinsky

    Progress in Earth and Planetary Science 2016 3:10

    Published on: 28 April 2016

  8. Research article

    Impact-induced melting during accretion of the Earth

    Because of the high energies involved, giant impacts that occur during planetary accretion cause large degrees of melting. The depth of melting in the target body after each collision determines the pressure a...

    Jellie de Vries, Francis Nimmo, H. Jay Melosh, Seth A. Jacobson, Alessandro Morbidelli and David C. Rubie

    Progress in Earth and Planetary Science 2016 3:7

    Published on: 14 March 2016

  9. Methodology

    New parameter of roundness R: circularity corrected by aspect ratio

    In this paper, we propose a new roundness parameter R, to denote circularity corrected by aspect ratio. The basic concept of this new roundness parameter is given by the following equation:

    Yasuhiro Takashimizu and Maiko Iiyoshi

    Progress in Earth and Planetary Science 2016 3:2

    Published on: 20 January 2016

  10. Research article

    Evidence for natural molecular hydrogen seepage associated with Carolina bays (surficial, ovoid depressions on the Atlantic Coastal Plain, Province of the USA)

    A study of soil gases was made in North Carolina (USA) in and around morphological depressions called “Carolina bays.” This type of depression is observed over the Atlantic coastal plains of the USA, but their...

    Viacheslav Zgonnik, Valérie Beaumont, Eric Deville, Nikolay Larin, Daniel Pillot and Kathleen M. Farrell

    Progress in Earth and Planetary Science 2015 2:31

    Published on: 9 October 2015

  11. Review

    Liquid sodium models of the Earth’s core

    Our understanding of the dynamics of the Earth’s core can be advanced by a combination of observation, experiments, and simulations. A crucial aspect of the core is the interplay between the flow of the conduc...

    Matthew M. Adams, Douglas R. Stone, Daniel S. Zimmerman and Daniel P. Lathrop

    Progress in Earth and Planetary Science 2015 2:29

    Published on: 17 September 2015

  12. Research article

    Geographical distribution of shear wave anisotropy within marine sediments in the northwestern Pacific

    In the northwestern Pacific, the elastic properties of marine sediments, including P-wave velocities (Vp) and S wave velocities (Vs), have recently been constrained by active seismic surveys. However, information...

    Takashi Tonegawa, Yoshio Fukao, Gou Fujie, Shunsuke Takemura, Tsutomu Takahashi and Shuichi Kodaira

    Progress in Earth and Planetary Science 2015 2:27

    Published on: 17 September 2015

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