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  • Conference paper
    Ciesla FJ, Collins GS, Davison TM, O'Brien DPet al., 2009,

    Collisions among porous planetesimals and the water content of planetary embryos

    , 19th Annual VM Goldschmidt Conference, Publisher: Elsevier, Pages: A227-A227, ISSN: 0016-7037
  • Journal article
    Aguera F, Liu JG, 2009,

    Automatic greenhouse delineation from QuickBird and Ikonos satellite images

    , COMPUTERS AND ELECTRONICS IN AGRICULTURE, Vol: 66, Pages: 191-200, ISSN: 0168-1699
  • Journal article
    Amidon WH, Rood DH, Farley KA, 2009,

    Cosmogenic <sup>3</sup>He and <sup>21</sup>Ne production rates calibrated against <sup>10</sup>Be in minerals from the Coso volcanic field

    , Earth and Planetary Science Letters, Vol: 280, Pages: 194-204, ISSN: 0012-821X

    This study calibrates the production rate of cosmogenic 3He in pyroxene, olivine, garnet, zircon and apatite as well as 21Ne in quartz and pyroxene against the known production rate of 10Be in quartz. The Devil's Kitchen rhyolite from the Coso volcanic field in southeastern California (elev. ~ 1300 m) was chosen for this study due to its young age (~ 610 ka) and diverse mineral assemblage. Based on 10Be, our two rhyolite samples have apparent exposure ages of ~ 49 and 93 ka, indicating substantial erosion after eruption. Combining data from the two samples, we estimate sea level high latitude 3He spallation production rates of 145 ± 11, 141 ± 16, and 144 ± 30 at g- 1 a- 1 (2σ) for pyroxene, olivine and spessartine garnet respectively. For zircon and apatite, we estimate apparent 3He spallation production rates of 114 ± 8 and 149 ± 28 at g- 1 a- 1 (2σ) respectively. The rates for zircon and apatite are reported as apparent production rates because we do not explicitly address the redistribution of spallation produced 3He from adjacent minerals. These estimates quantitatively account for production of 3He from both cosmogenic and radiogenic neutron reactions on 6Li within the analyzed phases and also implanted from nuclear reactions in neighboring minerals; the high U, Th and Li content of this rhyolite provides a particularly rigorous test of this correction. We estimate 21Ne production rates of 17.7 ± 1.6 and 34.1 ± 3.2 at g- 1 a- 1 (2σ) in quartz and pyroxene (Fe/Mg = 0.7 by mass) respectively. Although high U and Th contents create the potential for significant production of nucleogenic 21Ne, this component is small due to the young eruption age of the rhyolite. © 2009 Elsevier B.V. All rights reserved.
  • Journal article
    Capitanio FA, Morra G, Goes S, 2009,

    Dynamics of plate bending at the trench and slab-plate coupling

    , GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Vol: 10, ISSN: 1525-2027
  • Journal article
    Jackson CA-L, Larsen E, 2009,

    Temporal and spatial development of a gravity-driven normal fault array: Middle-Upper Jurassic, South Viking Graben, northern North Sea

    , Journal of Structural Geology, Vol: 31, Pages: 388-402

    Three-dimensional seismic and well data from the South Viking Graben, northern North Sea Basin, is used to investigate the temporal and spatial development of a gravity-driven normal fault array above an evaporite-rich detachment. Two moderate throw (500–900 m), Middle to Upper Jurassic normal faults (the Gudrun and Brynhild Faults) are developed within the study area. Both faults die-out laterally and tip-out upwards at different structural levels within the syn-rift succession. Both faults terminate downwards into Late Permian evaporites (Zechstein Group) and do not offset pre-evaporite basement units. This thin-skinned fault array developed in response to westwards tilting of the hangingwall of the South Viking Graben during Late Jurassic rifting, and consequent westward gliding and extensional break-up of units above the mechanically-weak evaporite horizon. Isochron mapping and well-based correlation of Middle to Upper Jurassic syn-rift units allow constraints to be placed on the temporal evolution of the fault array. Several stages of structural development are observed which document; (i) a period of relatively minor, early (i.e. pre-rift) halokinesis; (ii) variable spatial activity on individual faults within the array; and (iii) the progressive upslope migration of active faulting within the array as a whole. The progressive upslope migration of fault activity is interpreted to reflect progressive “unbuttressing” and extensional faulting of upslope, post-evaporite units. The overall structural style and kinematic evolution identified here shares many characteristics with both ‘rift–raft tectonics’ documented in other rifts developed above an evaporitic sub-stratum and ‘raft tectonics’ described from passive margin basins containing thick mobile salt or shale intervals. This style of fault array evolution differs from that observed in rifts lacking mobile layers at-depth and highlights the importance of these un
  • Journal article
    Fang F, Pain CC, Navon IM, Piggott MD, Gorman GJ, Allison PA, Goddard AJHet al., 2009,

    Reduced-order modelling of an adaptive mesh ocean model

    , INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, Vol: 59, Pages: 827-851
  • Journal article
    Boulton SJ, Whittaker AC, 2009,

    Quantifying the slip rates, spatial distribution and evolution of active normal faults from geomorphic analysis: Field examples from an oblique-extensional graben, southern Turkey

    , GEOMORPHOLOGY, Vol: 104, Pages: 299-316, ISSN: 0169-555X
  • Journal article
    Slingo J, Bates K, Nikiforakis N, Piggott M, Roberts M, Shaffrey L, Stevens I, Vidale PL, Weller Het al., 2009,

    Developing the next-generation climate system models: challenges and achievements

    , PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, Vol: 367, Pages: 815-831, ISSN: 1364-503X
  • Journal article
    Ham DA, Farrell PE, Gorman GJ, Maddison JR, Wilson CR, Kramer SC, Shipton J, Collins GS, Cotter CJ, Piggott MDet al., 2009,

    Spud 1.0: generalising and automating the user interfaces of scientific computer models

    , Geoscientific Model Development, Vol: 2, Pages: 33-42

    The interfaces by which users specify the scenarios to be simulated by scientific computer models are frequently primitive, under-documented and ad-hoc text files which make using the model in question difficult and error-prone and significantly increase the development cost of the model. In this paper, we present a model-independent system, Spud, which formalises the specification of model input formats in terms of formal grammars. This is combined with an automated graphical user interface which guides users to create valid model inputs based on the grammar provided, and a generic options reading module, libspud, which minimises the development cost of adding model options. Together, this provides a user friendly, well documented, self validating user interface which is applicable to a wide range of scientific models and which minimises the developer input required to maintain and extend the model interface.
  • Journal article
    Latham JP, Mindel J, Xiang J, Guises R, Garcia X, Pain C, Gorman G, Piggott M, Munjiza Aet al., 2009,

    Coupled FEMDEM/Fluids for coastal engineers with special reference to armour stability and breakage

    , Geomechanics and Geoengineering, Vol: 4, Pages: 39-53, ISSN: 1748-6033
  • Conference paper
    Jardine RJ, 2009,

    Administrative report for TC-29, laboratory stress-strain and strength testing of geomaterials

    , Pages: 3771-3773

    TC-29 has been active since the Osaka Conference. This report describes its Terms of Reference, work and achievements. © 2011 IOS Press.
  • Book chapter
    Marano GC, Sgobba S, Stafford PJ, Greco Ret al., 2009,

    Seismologically consistent stochastic spectra

    , New Trends in Seismic Design of Structures, Editors: Lagaros, Tsompanakis, Papadrakakis, Publisher: Saxe-Cobourg
  • Conference paper
    Gorman GJ, Pain CC, Piggott MD, Umpleby AP, Farrell PE, Maddison JRet al., 2009,

    Interleaved parallel tetrahedral mesh optimisation and dynamic load-balancing

    , Brussels, Belgium, the fourth International Conference on Adaptive Modeling and Simulation
  • Journal article
    Wallace LM, Reyners M, Cochran U, Bannister S, Barnes P, Berryman K, Downes G, Eberhart-Phillips D, Fagereng A, Ellis S, Nicol A, McCaffrey R, Beavan RJ, Henrys S, Sutherland R, Barker DHN, Litchfield N, Townend J, Robinson R, Bell RE, Wilson K, Power Wet al., 2009,

    Characterizing the seismogenic zone of a major plate boundary subduction thrust: Hikurangi Margin, New Zealand

    , Geochemistry, Geophysics, Geosystems, Vol: 10
  • Journal article
    Stafford PJ, Berrill JB, Pettinga JR, 2009,

    New predictive equations for Arias Intensity from crustal earthquakes in New Zealand

    , Journal of Seismology, Vol: 13, Pages: 31-52, ISSN: 1383-4649
  • Journal article
    van Reeuwijk M, Mathias SA, Simmons CT, Ward JDet al., 2009,

    Insights from a pseudospectral approach to the Elder problem

    , WATER RESOUR RES, Vol: 45, W0441, ISSN: 0043-1397

    The aim of this paper is to clarify and circumvent the issue of multiple steady state solutions in the Elder problem. A pseudospectral method is used to avoid numerical error associated with spatial discretization. The pseudospectral method is verified by comparison to an analytical solution at Rayleigh number, Ra = 0, and by reproducing the three stable steady state solutions that are known to exist at Ra = 400. A bifurcation diagram for 0 < Ra < 400 which is free of discretization error, confirms that multiple steady states are indeed an intrinsic characteristic of the Elder problem. The existence of multiple steady states makes the Ra = 400 Elder problem less suitable for benchmarking numerical models. To avoid the multiple steady states, we propose a benchmark at Ra = 60. The results for this Low Rayleigh Number Elder Problem are presented and compared to simulations with the commercial groundwater modeling package FEFLOW. Correspondence between the pseudospectral model and FEFLOW is excellent.
  • Conference paper
    Stafford PJ, 2009,

    Towards vector implementations of hazard analysis and loss estimation

    , Earthquake Engineering by the Beach, Publisher: RELIUS
  • Journal article
    Farrell PE, Piggott MD, Pain CC, Gorman GJ, Wilson CRet al., 2009,

    Conservative interpolation between unstructured meshes via supermesh construction

    , Computer Methods in Applied Mechanics and Engineering, Vol: 198, Pages: 2632-2642
  • Journal article
    Christeson GL, Collins GS, Morgan JV, Gulick SPS, Barton PJ, Warner MRet al., 2009,

    Mantle deformation beneath the Chicxulub impact crater

    , Earth and Planetary Science Letters, Vol: 284, Pages: 249-257, ISSN: 0012-821X
  • Book chapter
    Bommer JJ, Stafford PJ, 2009,

    Seismic hazard and earthquake actions

    , Seismic Design of Buildings to Eurocode 8, Editors: Elghazouli, Oxon, UK, Publisher: Spon Press, Pages: 6-46, ISBN: 978-0-415-44762-1

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