American Geophysical Union (AGU)

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The water retention curve and relative permeability for gas production from hydrate‐bearing sediments: pore‐network model simulation
American Geophysical Union (AGU) - Tập 17 Số 8 - Trang 3099-3110 - 2016
Nariman Mahabadi, Sheng Dai, Yongkoo Seol, Tae Sup Yun, Jaewon Jang
AbstractThe water retention curve and relative permeability are critical to predict gas and water production from hydrate‐bearing sediments. However, values for key parameters that characterize gas and water flows during hydrate dissociation have not been identified due to experimental challenges. This study utilizes the combined techniques of micro‐focus X‐ray com...... hiện toàn bộ
Natural surface rebound of the Bangkok plain and aquifer characterization by persistent scatterer interferometry
American Geophysical Union (AGU) - Tập 15 Số 4 - Trang 965-974 - 2014
Kazuya Ishitsuka, Yo Fukushima, Takeshi Tsuji, Yasuhiro Yamada, Toshifumi Matsuoka, Pham Huy Giao
Natural surface rebound of the Bangkok plain and aquifer characterization by persistent scatterer interferometry
American Geophysical Union (AGU) - Tập 15 Số 4 - Trang 965-974 - 2014
Kazuya Ishitsuka, Y. Fukushima, Takeshi Tsuji, Yasuhiro Yamada, Toshifumi Matsuoka, Pham Huy Giao
Inferring crustal structure in the Aleutian island arc from a sparse wide‐angle seismic data set
American Geophysical Union (AGU) - Tập 5 Số 8 - 2004
Harm J. A. Van Avendonk, D. J. Shillington, W. Steven Holbrook, Matthew J. Hornbach
Compressional seismic travel times from a relatively sparse wide‐angle data set hold key information on the structure of a 800 km long section of the central Aleutian arc. Since the source and receiver locations form a swath along the arc crest that is ∼50 km wide, we trace rays in 3‐D for a collection of 8336 seismic refraction and reflection arrivals. We investigate variations in seismic...... hiện toàn bộ
Near mantle solidus trace element partitioning at pressures up to 3.4 GPa
American Geophysical Union (AGU) - Tập 3 Số 7 - Trang 1-23 - 2002
Vincent J. M. Salters, John Longhi, Michael Bizimis
We present new experimental partitioning data for a range of petrogenetically important elements at pressures of up to 3.4 GPa. The experiments are designed to mimic low degrees of anhydrous melting beneath mid‐ocean ridges. The available data indicate that the partition coefficients are pressure, temperature, and composition dependent. Therefore partitioning behavior over the appropriate ...... hiện toàn bộ
Primitive shoshonites from Fiji: Geochemistry and source components
American Geophysical Union (AGU) - Tập 10 Số 7 - 2009
Roman A. J. Leslie, L Danyushevsky, Anthony J. Crawford, Alicia Verbeeten
The eruption of shoshonitic magmas in Fiji during the Late Miocene‐Pliocene (5.5–3 Ma) from 11 main volcanic centers along three broad ENE and NNW trending lineaments coincides with well‐developed spreading in the North Fiji and Lau back‐arc basins and maximum rotation of the Fiji Platform. The most mafic shoshonitic lavas (absarokites) range from 8.4 to 15.2 wt % MgO and are variably clin...... hiện toàn bộ
Constraints on deformation conditions and the origin of oceanic detachments: The Mid‐Atlantic Ridge core complex at 15°45′N
American Geophysical Union (AGU) - Tập 4 Số 8 - 2003
J. Escartı́n, Catherine Mével, C. J. MacLeod, A. M. McCaig
Deformed rocks sampled from a corrugated detachment fault surface near the Mid‐Atlantic Ridge (15°45′N) constrain the conditions of deformation and strain localization. Samples recovered in situ record deformation restricted to the cold (shallow) lithosphere (greenschist facies), with no evidence for significant high‐temperature deformation either at the fault zone or in the footwall near ...... hiện toàn bộ
Rheologic controls on slab dynamics
American Geophysical Union (AGU) - Tập 8 Số 8 - 2007
M. I. Billen, Greg Hirth
Several models have been proposed to relate slab geometry to parameters such as plate velocity or plate age. However, studies on the observed relationships between slab geometry and a wide range of subduction parameters show that there is not a simple global relationship between slab geometry and any one of these other subduction parameters for all subduction zones. Numerical and laborator...... hiện toàn bộ
Constraining seismic velocity and density for the mantle transition zone with reflected and transmitted waveforms
American Geophysical Union (AGU) - Tập 7 Số 10 - 2006
J. F. Lawrence, Peter M. Shearer
We examine stacks of several seismic phases having different sensitivities to mantle transition zone structure. When analyzed separately, underside P and S reflections (PdP and SdS) are suggestive of very different structures despite similar raypaths and data coverage. By stacking th...... hiện toàn bộ
Dynamics of thermochemical plumes: 2. Complexity of plume structures and its implications for mapping mantle plumes
American Geophysical Union (AGU) - Tập 7 Số 3 - 2006
Shu‐Chuan Lin, Peter E. van Keken
The mantle plume hypothesis provides explanations for several major observations of surface volcanism. The dynamics of plumes with purely thermal origin has been well established, but our understanding of the role of compositional variations in the Earth's mantle on plume formation is still incomplete. In this study we explore the structures of plumes originating from a thermochemical boun...... hiện toàn bộ
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