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Conference paperAnh-Minh N, Nishimura S, Takahashi A, et al., 2011,
On the control systems and instrumentation required to investigate the anisotropy of stiff clays and mudrocks through Hollow Cylinder Tests
, Seoul, Korea, 5th International Symposium on Deformation Characteristics of Geomaterials, Publisher: Hanrimwon, Pages: 287-294 -
Conference paperRimoy SP, Jardine RJ, 2011,
Strain accumulation in a silica sand due to creep after normal compression, and during sustained low-level cyclic loading
, Seoul, Korea, 5th International Symposium on Deformation Characteristics of Geomaterials, Publisher: Hanrimwon, Pages: 463-470 -
Conference paperShen CH, O'Sullivan C, Jardine RJ, 2011,
A micromechanical investigation of drained simple shear tests Deformation Characteristics of Geomaterials
, Seoul, Korea, 5th International Symposium on Deformation Characteristics of Geomaterials, Publisher: Hanrimwon, Pages: 314-321 -
Conference paperAltuhafi F, Jardine RJ, 2011,
Effect of particle breakage and strain path reversal on the properties of sands located near to driven piles
, Seoul, Korea, 5th International Symposium on Deformation Characteristics of Geomaterials, Publisher: Hanrimwon, Pages: 386-395 -
Conference paperBrosse A, Hosseini Kamal R, Jardine RJ, et al., 2011,
Measuring the static and dynamic small strain stiffness of UK mudrocks
, 15th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE), Publisher: Millpress, Pages: 137-142 -
Journal articleBell RE, McNeill LC, Henstock TJ, et al., 2011,
Comparing extension on multiple time and depth scales in the Corinth Rift, Central Greece
, GEOPHYSICAL JOURNAL INTERNATIONAL, Vol: 186, Pages: 463-470, ISSN: 0956-540X- Author Web Link
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- Citations: 33
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Journal articleJackson CAL, Somme TO, 2011,
Borehole evidence for wing-like clastic intrusion complexes on the western Norwegian margin
, Geological Society of London, Vol: 168, Pages: 1075-1078Data from a borehole on the Norwegian margin indicate that a strata-concordant amplitude anomaly within the Upper Cretaceous succession represents a 15 m thick sandbody that was either intruded in the subsurface or extruded on the palaeo-seabed. This observation implies that spatially related, strata-discordant anomalies are the seismic expression of sandstone dykes, thereby supporting previous geometry-based interpretations of the origin of these amplitude anomalies. Furthermore, this study indicates that thickness of an intrusion may be overestimated if based solely on seismic reflection mapping, and that this may lead to erroneous calculation of the ratio between depositional and intruded sandstone.
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Journal articleGhail RC, Wilson C, Galand M, et al., 2011,
EnVision: taking the pulse of our twin planet
, Experimental Astronomy: an international journal on astronomical instrumentation and data analysisEnVision is an ambitious but low-risk response to ESA’s call for a medium-size mission opportunity for a launch in 2022. Venus is the planet most similar to Earth in mass, bulk properties and orbital distance, but has evolved to become extremely hostile to life. EnVision’s 5-year mission objectives are to determine the nature of and rate of change caused by geological and atmospheric processes, to distinguish between competing theories about its evolution and to help predict the habitability of extrasolar planets. Three instrument suites will address specific surface, atmosphere and ionosphere science goals. The Surface Science Suite consists of a 2.2 m2 radar antenna with Interferometer, Radiometer and Altimeter operating modes, supported by a complementary IR surface emissivity mapper and an advanced accelerometer for orbit control and gravity mapping. This suite will determine topographic changes caused by volcanic, tectonic and atmospheric processes at rates as low as 1 mm a − 1. The Atmosphere Science Suite consists of a Doppler LIDAR for cloud top altitude, wind speed and mesospheric structure mapping, complemented by IR and UV spectrometers and a spectrophotopolarimeter, all designed to map the dynamic features and compositions of the clouds and middle atmosphere to identify the effects of volcanic and solar processes. The Ionosphere Science Suite uses a double Langmiur probe and vector magnetometer to understand the behaviour and long-term evolution of the ionosphere and induced magnetosphere. The suite also includes an interplanetary particle analyser to determine the delivery rate of water and other components to the atmosphere.
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Journal articleMoon S, Page Chamberlain C, Blisniuk K, et al., 2011,
Climatic control of denudation in the deglaciated landscape of the Washington Cascades
, Nature Geoscience, Vol: 4, Pages: 469-473, ISSN: 1752-0894Since the Last Glacial Maximum, the extent of glaciers in many mountainous regions has declined, and erosion driven by glacial processes has been supplanted by fluvial incision and mass wasting processes. This shift in the drivers of erosion is thought to have altered the rate and pattern of denudation of these landscapes. The Washington Cascades Mountains in the northwestern USA still bear the topographic imprint of Pleistocene glaciations, and are affected by large variations in precipitation, making them an ideal setting to assess the relative controls of denudation. Here we show that denudation rates over the past millennia, as determined by 10 Be exposure ages, range from 0.08 to 0.57 yr-1, about four times higher than the rates inferred for million-year timescales. We find that the millennial timescale denudation rates increase linearly with modern precipitation rates. Based on our landscape analyses, we suggest that this relationship arises because intense precipitation triggers landslides, particularly on slopes that have been steepened by glacial erosion before or during the Last Glacial Maximum. We conclude that the high modern interglacial denudation rates we observe in the Washington Cascades are driven by a disequilibrium between the inherited topography and the current spatial distribution of erosional processes that makes this range particularly sensitive to spatial variations in climate. © 2011 Macmillan Publishers Limited. All rights reserved.
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Journal articleGomes JLMA, Pain CC, Eaton MD, et al., 2011,
Coupled neutronics-fluids modelling of criticality within a MOX powder system
, PROGRESS IN NUCLEAR ENERGY, Vol: 53, Pages: 523-552, ISSN: 0149-1970Investigation of nuclear criticality in powder systems is necessary for the assessment of industrial plant integrity and potential radiation impacts on worker and the public health. For nuclear fuel processing, to produce fuel pellets, MOX (UO2 + PuO2) and zinc stearate (lubricant) powders are homogenised in a stirred vessel. The coupled multi-fluids (multiphase and multi-component) and neutron-radiation transport FETCH model was extended to simulate reactivity feedback mechanisms and to assess safety and potential risks of criticality incursions in 2-3D systems. This work has strengthened links with the Japan Atomic Energy Agency (JAEA), led to consultancy work with Japanese National Labs and work with Tokyo University that led on to the Todai Forum and the core to core program with Japan.
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Journal articlevan Reeuwijk M, 2011,
A mimetic mass, momentum and energy conserving discretization for the shallow water equations
, COMPUTERS & FLUIDS, Vol: 46, Pages: 411-416, ISSN: 0045-7930- Author Web Link
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- Citations: 5
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Journal articleWhittaker AC, Duller RA, Springett J, et al., 2011,
Decoding downstream trends in stratigraphic grain size as a function of tectonic subsidence and sediment supply
, GEOLOGICAL SOCIETY OF AMERICA BULLETIN, Vol: 123, Pages: 1363-1382, ISSN: 0016-7606- Author Web Link
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- Citations: 63
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Journal articleKieft RL, Hampson GJ, Jackson CA-L, et al., 2011,
Stratigraphic Architecture of a Net-Transgressive Marginal- to Shallow-Marine Succession: Upper Almond Formation, Rock Springs Uplift, Wyoming, U.S.A.
, Journal of Sedimentary Research, Vol: 81, Pages: 513-533, ISSN: 1527-1404 -
Journal articleWozniakiewicz PJ, Ishii HA, Kearsley AT, et al., 2011,
Investigation of iron sulfide impact crater residues: A combined analysis by scanning and transmission electron microscopy
, METEORITICS & PLANETARY SCIENCE, Vol: 46, Pages: 1007-1024, ISSN: 1086-9379- Author Web Link
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- Citations: 23
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Conference paperBland PA, Muxworthy AR, Collins GS, et al., 2011,
Heterogeneous shock in porous chondrites: Implications for Allende magnetization
, 74th Annual Meeting of the Meteoritical-Society, Publisher: Wiley-Blackwell, Pages: A22-A22, ISSN: 1086-9379 -
Conference paperCollins GS, Davison TM, Ciesla FJ, 2011,
The effects of planetesimal collisions
, 74th Annual Meeting of the Meteoritical-Society, Publisher: Wiley-Blackwell, Pages: A46-A46, ISSN: 1086-9379 -
Conference paperDavison TM, Ciesla FJ, Collins GS, 2011,
Quantification of the post-impact thermal evolution of planetesimals
, 74th Annual Meeting of the Meteoritical-Society, Publisher: Wiley-Blackwell, Pages: A53-A53, ISSN: 1086-9379 -
Conference paperMiljkovic K, Mannick S, Collins GS, et al., 2011,
HYDROCODE SIMULATIONS OF BINARY ASTEROID IMPACTS
, 74th Annual Meeting of the Meteoritical-Society, Publisher: WILEY-BLACKWELL, Pages: A161-A161, ISSN: 1086-9379 -
Journal articleMerchel S, Bremser W, Alfimov V, et al., 2011,
Ultra-trace analysis of <sup>36</sup>Cl by accelerator mass spectrometry: An interlaboratory study
, Analytical and Bioanalytical Chemistry, Vol: 400, Pages: 3125-3132, ISSN: 1618-2642A first international 36Cl interlaboratory comparison has been initiated. Evaluation of the final results of the eight participating accelerator mass spectrometry (AMS) laboratories on three synthetic AgCl samples with 36Cl/Cl ratios at the 10-11, 10-12, and 10-13 level shows no difference in the sense of simple statistical significance. However, more detailed statistical analyses demonstrate certain interlaboratory bias and underestimation of uncertainties by some laboratories. Following subsequent remeasurement and reanalysis of the data from some AMS facilities, the round-robin data indicate that 36Cl/Cl data from two individual AMS laboratories can differ by up to 17%. Thus, the demand for further work on harmonising the 36Cl-system on a worldwide scale and enlarging the improvement of measurements is obvious. © 2011 Springer-Verlag.
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Journal articleGulamali MY, Leinov E, Jackson MD, 2011,
Self-potential anomalies induced by water injection into hydrocarbon reservoirs
, Geophysics, Vol: 76, Pages: F283-F292, ISSN: 1942-2156The injection of cold water into a hydrocarbon reservoir containingrelatively warmer, more saline formation brine may generateself-potential anomalies as a result of electrokinetic,thermoelectric, and=or electrochemical effects. We havenumerically assessed the relative contributions of these effectsto the overall self-potential signal generated during oil productionin a simple hydrocarbon reservoir model. Our aim was todetermine if measurements of self-potential at a production wellcan be used to detect the movement of water toward the well.The coupling coefficients for the electrochemical and thermoelectricpotentials are uncertain, so we considered four differentmodels for them. We also investigated the effect of altering thesalinities of the formation and injected brines. We found thatthe electrokinetic potential peaked at the location of the saturationfront (reaching values of 0.2 mV even for the most salinebrine considered). Moreover, the value at the production wellincreased as the front approached the well, exceeding the noiselevel ( 0.1 mV). Thermoelectric effects gave rise to largerpotentials in the reservoir (10 mV), but values at the wellwere negligible ð Þ .0:1 mV until after water breakthroughbecause of the lag in the temperature front relative to the saturationfront. Electrochemical potentials were smaller in magnitudethan thermoelectric potentials in the reservoir but were measurableð Þ > 0:1 mV at the well because the salinity front wasclosely associated with the saturation front. When the formationbrine was less saline (1 mol=liter), electrokinetic effects dominated;at higher salinities (5 mol=liter), electrochemicaleffects were significant. We concluded that the measurement ofself-potential signals in a production well may be used to monitorthe movement of water in hydrocarbon reservoirs duringproduction, but further research is required to understand thethermoelectric and electrochemical coupling coefficients in partiallysatu
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