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44 6.1 Hermanowski, P. et al. Hydrogeological aspects of the Weichselian glaciation in the Polish lowland area 45 6.1 Mäkinen, K. et al. National inventory of moraine formations in Finland 46 6.1 Ojalainen, J. et al A variety of glacial landforms and ice-flow indicators in the Kvarken Archipelago in Western Finland 47 6.1 Pasanen, A. Glaciotectonic deformation of till covered glaciofluvial deposits in Oulu region 48 6.1 Sarala, P. & Nenonen, Tracing mineralized boulders and till in the ribbed moraine J. area of Misi, northern Finland 49 7.1 Badjukov, D.D. & Ni-containing sulfides in impactites of the Lappajärvi, Raitala, J. Sääksjärvi, Suvasvesi South, and Paasselkä meteorite craters 50 7.1 Bäckström, A. et al. Gravity model of the Lockne Impact Crater 51 7.1 Dypvik, H. et al. The search for impact structures in Norway 52 7.1 Elbra, T. & Pesonen, Continental Deep Drilling – new challenges for geophysics L.J. 53 7.1 Frisk, Å.M. et al. The aftermath of marine impacts: Faunal recovery and sedimentation in the Ordovician Tvären crater, Sweden 54 7.1 Vishnevsky, S. et al. Popigai impact fluidizites: new data on opaques 55 7.1 Öhman, T. Dark veinlets in the granitoids of Saarijärvi, Söderfjärden and Lappajärvi impact structures 56 7.2 Aittola, M. et al. Geology of Noachis Terra, Mars 57 7.2 Bondarenko, N.V. et Roughness anisotropy of Venus surface. al. 58 7.2 Gurgurewicz, J. Erosional landforms and rock material in Noctis Labyrinthus (Valles Marineris, Mars) 59 7.2 Kreslavsky, M.A. et al. Impact Craters on the Northern Lowlands of Mars. 60 7.2 Lahtela, H. et al. Analysis of an enigmatic crater in Arabia Terra, Mars 61 7.2 Leitner, J.J. & Firneis, Comparison of Catalogue-Induced Heat Loss in Venusian M.G. Coronae 62 7.2 Törmänen, T.T. et al Morphological and topographical characteristics of Epona Corona, a multiple corona on Venus 63 8.1 Ahtola, T. et al. Kuovila wollastonite-calcite marble, a new potential GCC- deposit in SW Finland 64 8.1 Baarup Jensen, A. et White cement: mineralization and nodulisation effects caused al. by K2O, SO3, MgO and F 65 8.1 Bræstrup, F. et al. Analysis of (M2Cu2O3)7(CuO2)10, (M = Sr, Ca), spin-ladder composite compounds. 66 8.1 Drejer-Nielsen, M. et Crystal structure of bøgvadite al. 67 8.1 Nielsen, L.J. & Balic- Accuracy of Rietveld refinements of alkali feldspars Zunic, T. 68 8.1 Olsen, L.A. et al. Crystal structures of Pb-Bi sulfosalts under high pressure 69 8.1 Sarapää, O. et al. Exploration results and geology of the Lumikangas apatite- ilmenite gabbro, Kauhajoki, western Finland 70 9.1 Auri, J. & Räsänen, M. Early Weichselian interstadial lake deposits at Björkö Island, Kvarken Archipelago, Finland 71 9.1 Hellman, S.E.V et al. Validation of the REVEALS-model for southern Sweden Wednesday 11.1.2006 All the presentations are in running order 8.30- Plenary session, Room L3 Christmann, P. The European Construction: what perspectives for the geological community Pease., V. International Geoscience Program (IGCP), Sweden and a Nordic consortium Session 1. Room L3 9.10-9.50 Weihed, P. et al. Keynote Precambrian geodynamics and ore formation: the Fennoscandian Shield Session 1.4. Room L3 Pär Weihed 10.20- Edfelt, Å. et al. Apatite chemistry – a potential tool for IOCG exploration 10.40 10.40- Sundblad, K. et al. Source of lead in Mesozoic baryte-galena-sphalerite 11.00 mineralization at Svalbard 11.00- Segalstad, T.V. et al. Stable isotope evidence for Ba–Pb–Zn vein mineralizations 11.20 by fluid circulation in the sedimentary basin at Svalbard 11.20- Sorjonen-Ward, P. et al. The role of impermeable seals in convective hydrothermal 11.40 systems –numerical models and field examples 11.40- Peltonen, P. et al. Outokumpu revisited: New mineral deposit model for the 12.00 mantle peridotite -associated Cu-Co-Zn-Ni-Ag-Au sulphide deposits 13.30- Rassa, I. et al. Base metal and gold exploration in the Khuni area, Anarak, 13.50 Iran; an exploration case study in an arid environment 13.50- Hallberg, A. et al. The Grängesberg apatite-iron deposit – biggest in 14.10 Bergslagen, Sweden 14.10- Sorjonen-Ward, P. et al. Structural framework of the Outokumpu ore deposits – 14.30 geological and numerical modelling constraints 14.30- Mokrushin, A.V. & Smolkin, Features of chromite mineralization composition in 14.50 V.F. Paleoproterozoic Monchegorsk layered intrusion (Russia, Kola Peninsula) 14.50- Sundblad, K. et al. Evidence for volcanic-hosted Ag-Pb-Zn-Cd-As-Bi-bearing 15.10 hydrothermal mineralization in southern Sweden 15.10- Hosseini, M. & Liaghat, S. Ore reserve estimation of the Anomaly No.3 of the Gol-e- 15.30 Gohar iron mine (SW Sirjan, Iran) using ordinary kriging (OK) geostatistics 16.00- Årebäck, H. et al. Petrology and geochemistry of the Näsberget layered 16.20 intrusion, Skellefte district, Northern Sweden Session 1.1. Room L3 16.20- Eilu, P. Metal associations in genetic types of gold deposits 16.40 16-40- Nykänen, V. et al. Conceptual prospectivity analysis for IOCG mineralisation 17.00 in Finland 17.00- Ojala, V.J. et al Orogenic gold prospectivity mapping of the Central Lapland 17.20 greenstone belt, Northern Finland Session 13.1. Room L8 Kari Strand 9.10-9.50 Backman, J. Keynote First paleoceanographic drilling of Cenozoic sediments in the central Arctic Ocean 10.20- Ahokas, J.M. et al Geological Reservoir Characterization of Heterolithic 10.40 Sandstone Bodies, with reference to Northeast Greenland (Jameson Land) and the Mid-Norwegian Shelf (Halten Terrace) 10.40- Strand, K. et al. Implications of sediment composition changes for onset of 11.00 glaciation and glacial dynamics in Prydz Bay continental margin, Antarctica 11.00- van der Meer, J.J.M. & Barrett, P. Liquid water as far as the -30 degrees C isotherm in 11.20 Antarctica Session 9.2. Room L8 Matti Saarnisto 11.20- Saarnisto, M. Keynote Glacier and climate fluctuations during the last interglacial- 12.00 glacial cycle in northern Eurasia 13.30- Funder, S. et al. Early onset of The Gulf Stream System in the Eemian – 13.50 evidence from northern Russia 13.50- Jensen, M. Fluvial response to climate and sea level change during the 14.10 last interglacial - glacial cycle, Arkhangelsk region, NW Russia 14.10- Kortekaas, M. et al OSL chronology for a sediment core from the southern Baltic 14.30 Sea; a complete palaeoenvironmental record since deglaciation? 14.30- van Mourik, C.A. & Brinkhuis, The Massignano Eocene-Oligocene Global Stratigraphic 14.50 H. Section and Point revisited 14.50- Rubensdotter, L. & Rousse, S. Holocene slope activity impacting lacustrine sediment 15.10 archives in alpine environments Session 6.2. Room L8 Juha-Pekka Lunkka 15.10- Larsen, E. & Kjær, K.H. Late Pleistocene palaeoenvironmental changes in NW 15.30 Russia; Shifting ice sheet domains and proglacial lakes 16.00- Kjær, K.H. et al. Was shelf-ice collapse triggered by rapid sea-level rise in the 16.20 Barents Sea during MIS 3? 16.20- Fjellanger, J. et al. Palaeolandscapes and glaciations on the Varanger Peninsula, 16.40 Northern Norway 16-40- Sutinen, R. et al. Glacial morphology and paleohydrography suggest three 17.00 Weichselian ice advances in northern Finland 17.00- Mäkinen, K. Peräpohjola interstadial – A Middle Weichselian interstadial 17.20 17.20- Lyså, A. et al. The last deglaciation and Holocene period in western 17.40 Norway; fjord and lake sedimentation in the Nordfjord area. Session 7. Room L7 Jouko Raitala et al. 9.10-9.50 Ori, G.G. Keynote The geological history of a large lacustrine body on Mars: the Juventae Chasma Session 7.1. Room L7 10.20- Dypvik, H. et al. Did the Mjølnir asteroid impact ignite Barents Sea 10.40 hydrocarbon source rocks? 10.40- Kalleson, E. et al Post impact deposits in the Gardnos impact structure, 11.00 Norway 11.00- Bäckström, A. et al. ESIR at Ilumetsa – an example of international student 11.20 cooperation in impact crater research 11.20- Plado, J & the ESIR Working The Ilumetsa meteorite crater field, SE Estonia – results of 11.40 Group the geophysical campaign 11.40- Kohonen, J. & Vaarma, M. Sedimentary rocks in Finnish impact structures - pre-impact 12.00 or post-impact? 13.30- Öhman, T. et al. Polygonal craters of Argyre region, Mars – Clues to cratering 13.50 mechanics? 13.50- Ormö, J. et al. Influence of target on the cratering process: Laboratory 14.10 experiments, field observations and numerical simulations 14.10- Ruotsalainen, H.E. et al. Gravity survey of the Keurusselkä meteorite impact 14.30 structure 14.30- Tuisku, P. & Hanski, E. Planar deformation features in quartz phenocrysts from 14.50 Palaeoproterozoic felsic tuffs at Pechenga, Kola Peninsula, Russia 14.50- Versh, E. et al. Development of potential ecological niches in IHT systems: 15.10 the small-to-medium size impacts 15.10- Salminen, J. et al. New data for calibrating Kaapvaal craton’s apparent polar 15.30 wander path - Vredefort impact crater, South Africa Session 7.2. Room L7 16.00- Kohout, T. et al. Magnetic record of ordinary chondrite chondrules 16.20 16.20- Korteniemi, J. et al. HRSC mapping of crater floor depressions in Hellas region, 16.40 Mars 16-40- Kostama, V.-P. et al. Analysis of the Reull Vallis fluvial system, Mars. 17.00 17.00- Sharkov, E.V. & Bogatikov, O.A. Comparative study of tectonomagmatic evolution of the 17.20 Earth and the Moon 17.20- Raitala, J. et al. Alluvial fan in Icaria Planum, Mars. 17.40 17.40- Rice, J.W.
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  • Structural Analysis of the Collar of the Vredefort Dome, South Africa— Significance for Impact-Related Deformation and Central Uplift Formation

    Structural Analysis of the Collar of the Vredefort Dome, South Africa— Significance for Impact-Related Deformation and Central Uplift Formation

    Meteoritics & Planetary Science 40, Nr 9/10, 1537–1554 (2005) Abstract available online at http://meteoritics.org Structural analysis of the collar of the Vredefort Dome, South Africa— Significance for impact-related deformation and central uplift formation Frank WIELAND, Roger L. GIBSON*, and Wolf Uwe REIMOLD Impact Cratering Research Group, School of Geosciences, University of the Witwatersrand, Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa *Corresponding author. E-mail: [email protected] (Received 25 October 2004; revision accepted 13 July 2005) Abstract–Landsat TM, aerial photograph image analysis, and field mapping of Witwatersrand supergroup meta-sedimentary strata in the collar of the Vredefort Dome reveals a highly heterogeneous internal structure involving folds, faults, fractures, and melt breccias that are interpreted as the product of shock deformation and central uplift formation during the 2.02 Ga Vredefort impact event. Broadly radially oriented symmetric and asymmetric folds with wavelengths ranging from tens of meters to kilometers and conjugate radial to oblique faults with strike-slip displacements of, typically, tens to hundreds of meters accommodated tangential shortening of the collar of the dome that decreased from ∼17% at a radius from the dome center of 21 km to <5% at a radius of 29 km. Ubiquitous shear fractures containing pseudotachylitic breccia, particularly in the metapelitic units, display local slip senses consistent with either tangential shortening or tangential extension; however, it is uncertain whether they formed at the same time as the larger faults or earlier, during the shock pulse. In addition to shatter cones, quartzite units show two fracture types—a cm- spaced rhomboidal to orthogonal type that may be the product of shock-induced deformation and later joints accomplishing tangential and radial extension.
  • Mars Water Posters

    Mars Water Posters

    Lunar and Planetary Science XXXVII (2006) sess608.pdf Thursday, March 16, 2006 POSTER SESSION II: MARS FLOWING AND STANDING WATER 7:00 p.m. Fitness Center Bargery A. S. Wilson L. Modelling Water Flow with Bedload on the Surface of Mars [#1218] We theorise the thermodynamical effects of entrainment of eroded cold rock and ice on proposed aqueous flow on the surface of Mars, at temperatures well below the triple point, with an upper surface exposed to the Martian atmosphere. Keszthelyi L. O’Connell D. R. H. Denlinger R. P. Burr D. A 2.5D Hydraulic Model for Floods in Athabasca Valles, Mars [#2245] We present initial results from the application of a new numerical model to floods in Athabasca Valles, Mars. Issues with the sparseness of MOLA data are of concern. Collier A. Sakimoto S. E. H. Grossman J. A. Silliman S. E. Parametric Study of Martian Floods at Cerberus Fossae [#2313] Recent studies of Athabasca Valles use values that may be artificially constrained. A set of Earth-derived values are proposed to be used when calculating flow rates. This will allow for the determination of the formation events of Athabasca Valles with greater accuracy. Gregoire-Mazzocco H. Stepinski T. F. McGovern P. J. Lanzoni S. Frascati A. Rinaldo A. Martian Meanders: Wavelength-Width Scaling and Flow Duration [#1185] Martian meanders reveals linear wavelength/width scaling with a coef. k~10, that can be used to estimate discharges. Simulations of channel evolution are used to determine flow duration from sinuosity. Application to Nirgal Vallis yields 200 yrs. Howard A.