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  • Journal article
    Bland PA, Jackson MD, Coker RF, Cohen BA, Webber JBW, Lee MR, Duffy CM, Chater RJ, Ardakani MG, McPhail DS, McComb DW, Benedix GKet al., 2009,

    Why aqueous alteration in asteroids was isochemical: High porosity not equal high permeability

    , EARTH AND PLANETARY SCIENCE LETTERS, Vol: 287, Pages: 559-568, ISSN: 0012-821X
  • Journal article
    Fang F, Pain CC, Navon IM, Gorman GJ, Piggott MD, Allison PA, Goddard AJHet al., 2009,

    A POD goal-oriented error measure for mesh optimization

    , International Journal for Numerical Methods in Fluids, Vol: 63, Pages: 185-206, ISSN: 1097-0363

    The approach for designing an error measure to guide an adaptive meshing algorithm proposed in Power et al. (Ocean Modell. 2006; 15:3-38) is extended to use a POD adjoint-based method, thus facilitating efficient primal and adjoint integration in time. The aim is to obtain a new mesh that can adequately resolve all the fields at all time levels, with optimal (w.r.t. the functional) efficiency. The goal-based method solves both the primal and adjoint equations to form the overall error norms, in the form of a metric tensor. The tetrahedral elements are then optimized so that they have unit size in Riemannian space defined with respect to the metric tensor.This is the first attempt to use POD to estimate an anisotropic error measure. The metric tensor field can be used to direct anisotropic mesh adaptivity. The resulting mesh is optimized to efficiently represent the solution fields over a given time period. The calculation of the error measures is carried out in the reduced space. The POD approach facilitates efficient integration backwards in time and yields the sensitivity analysis necessary for the goal-based error estimates. The accuracy of both the primal and adjoint-reduced models is thus optimized (through the use of anisotropic mesh adaptivity). In addition, the functional for optimizing meshes has been designed to be consistent with that for 4D Var data assimilation.

  • Journal article
    Getsinger A, Rushmer T, Jackson MD, Baker Det al., 2009,

    Generating High Mg-numbers and Chemical Diversity in Tonalite-Trondhjemite-Granodiorite (TTG) Magmas during Melting and Melt Segregation in the Continental Crust

    , JOURNAL OF PETROLOGY, Vol: 50, Pages: 1935-1954, ISSN: 0022-3530
  • Journal article
    Jardine RJ, Zhu B, Foray P, Dalton CPet al., 2009,

    EXPERIMENTAL ARRANGEMENTS FOR INVESTIGATION OF SOIL STRESSES DEVELOPED AROUND A DISPLACEMENT PILE

    , SOILS AND FOUNDATIONS, Vol: 49, Pages: 661-673, ISSN: 0038-0806
  • Journal article
    Zhu B, Jardine RJ, Foray P, 2009,

    THE USE OF MINIATURE SOIL STRESS MEASURING CELLS IN LABORATORY APPLICATIONS INVOLVING STRESS REVERSALS

    , SOILS AND FOUNDATIONS, Vol: 49, Pages: 675-688, ISSN: 0038-0806
  • Journal article
    Kenkmann T, Collins GS, Wittmann A, W√ľnnemann K, Reimold WU, Melosh HJet al., 2009,

    A model for the formation of the Chesapeake Bay impact crater as revealed by drilling and numerical simulation

    , Geological Society of America Special Paper, Vol: 458, Pages: 571-586
  • Journal article
    Jackson MD, Hampson GJ, Sech RP, 2009,

    Three-dimensional modeling of a shoreface-shelf parasequence reservoir analog: Part 2. Geologic controls on fluid flow and hydrocarbon recovery

    , AAPG BULLETIN, Vol: 93, Pages: 1183-1208, ISSN: 0149-1423
  • Journal article
    Jackson CA-L, Johnson HD, 2009,

    Sustained turbidity currents and their interaction with debrite-related topography; Labuan Island, offshore NW Borneo, Malaysia

    , Sedimentary Geology, Vol: 219, Pages: 77-96

    The Temburong Fm (Early Miocene), Labuan Island, offshore NW Borneo, was deposited in a lower-slope to proximal basin-floor setting, and provides an opportunity to study the deposits of sustained turbidity currents and their interaction with debrite-related slope topography. Two main gravity-flow facies are identified; (i) slump-derived debris-flow deposits (debrites) - characterised by ungraded silty mudstones in 1.5 to >60 m thick beds which are rich in large (>5 m) lithic clasts; and (ii) turbidity current deposits (turbidites) - characterised by medium-grained sandstone in beds up to 2 m thick, which contain structureless (Ta) intervals alternating with planar-parallel (Tb) and current-ripple (Tc) laminated intervals. Laterally discontinuous, cobble-mantled scours are also locally developed within turbidite beds. Based on these characteristics, these sandstones are interpreted as having been deposited from sustained turbidity currents. Cobble-mantled scours indicate periods of intense turbidity current waxing. The sustained turbidity currents are interpreted to have been derived from retrogressive collapse of sand-rich mouth bars (breaching) or directly from river effluent (hyperpycnal flow). Analysis of the stratal architecture of the two facies indicates that routing of the turbidity currents was influenced by topographic relief developed at the top of underlying debrite Turbidite beds are locally eroded at the base of an overlying debrite, possibly due to clast-related substrate ‘ploughing’ during the latter flow event. This study highlights the difficulty in constraining the origin of sustained turbidity currents in ancient sedimentary sequences. In addition, this study documents the importance large debrites may have in generating topography on submarine slopes and influencing routing of subsequent turbidity current and the geometry of their associated deposits.

  • Conference paper
    Barmpopoulos IH, Ho TYK, Jardine RJ, Anh-Minh Net al., 2009,

    The large displacement shear characteristics of granular media against concrete and steel interfaces

    , Amsterdam, Research Symposium on the Characterization and Behavior of Interfaces (CBI), Publisher: IOS Press, Pages: 17-24
  • Journal article
    Sech RP, Jackson MD, Hampson GJ, 2009,

    Three-dimensional modeling of a shoreface-shelf parasequence reservoir analog: Part 1. Surface-based modeling to capture high-resolution facies architecture

    , AAPG Bulletin, Vol: 93, Pages: 1155-1181, ISSN: 0149-1423
  • Book
    Liu JG, Mason P, 2009,

    Essential Image Processing and GIS for Remote Sensing

    , UK 9780470510322, Publisher: Wiley, ISBN: 9780470510322

    Essential Image Processing and GIS for Remote Sensing is an accessible overview of the subject and successfully draws together these three key areas in a ...

  • Conference paper
    Collins GS, Wuennemann K, 2009,

    NUMERICAL MODELING OF IMPACT EJECTION PROCESSES IN POROUS GEOLOGIC MATERIALS

    , 72nd Annual Meeting of the Meteoritical-Society, Publisher: METEORITICAL SOC, Pages: A53-A53, ISSN: 1086-9379
  • Conference paper
    Davison TM, Collins GS, Ciesla F, 2009,

    Quantifying heating in porous planetesimal collisions

    , 72nd Annual Meeting of the Meteoritical-Society, Publisher: Meteoritical Society, Pages: A58-A58, ISSN: 1086-9379
  • Conference paper
    Ciesla FJ, Davison TM, Collins GS, 2009,

    Cooling of porous planetesimals after impacts: Implications for the thermal evolution of primitive bodies

    , 72nd Annual Meeting of the Meteoritical-Society, Publisher: Meteoritical Society, Pages: A51-A51, ISSN: 1086-9379
  • Journal article
    Hwang YK, Ritsema J, Goes S, 2009,

    Spatial variations of P wave attenuation in the mantle beneath North America

    , JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, Vol: 114, ISSN: 2169-9313
  • 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

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