DOCSLIB.ORG

8. März 2002 in Hannover Recommended Citation

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
8. März 2002 in Hannover Recommended Citation 62. Jahrestagung der Deutschen Geophysikalischen Gesellschaft im Jahr der Geowissenschaften 3.–8. März 2002 in Hannover Recommended citation Deutsche Geophysikalische Gesellschaft (Ed.) (2002): 62. Jahrestagung der Deutschen Geophysikalischen Gesellschaft im Jahr der Geowissenschaften: 3. März bis 8. März 2002 in Hannover, Hannover: Leibniz Universität, 312 p. DOI: http://doi.org/10.2312/dgg62 ISSN: 0344-7251 DGG 2002 Abstracts der DGG - Tagung Hannover, 3.3.-8.3 2002 Abu-Ayyash, K. GD12 Abueladas, A. GDP11 Agnon, A. GDP12 Al-Amoush, H. GDP11 Alheid, H.J. UIP01 Alinaghi, A. SO09 Alteköster, C. SOP30 Andreescu, M. GRP01 Asch, G. SOP06 , SOP41 , SOP42 Aschmann, L. BPP02 Atakan, K. SO04 Böker, F. VUP06 , VUP02 Bönnemann, C. MG18 , MG19 , MG13 Börner, F. BPP04 , HG07 Börner, R.-U. GEP01 , GEP05 , GE06 , GEP03 Börngen, M. GS02 Büttner, K. UIP03 Bach, T. GDP07 Bahloul, F. GE12 Baisch, S. BP04 , SO18 Barckhausen, U. MGP06 , MGP05 , MG15 Bartels, J. BPP05 Barth, A. SO13 Bartov, Y. GDP08 Bataille, K. SOP41 Batzle, M.L. BP01 Bauer, K. MG11 Baumann, C. GRP01 Baumbach, M. SOP03 Beblo, M. EMP01 Becken, M. EMP04 , EMP03 Behain, D. MGP06 , MG18 , MGP05 Beilecke, T. SMP05 Ben-Avraham, Z. GD12 Ben-Zion, Y. SOP18 , SMP06 Berckhemer, H. GDP02 http://dgg-online.de/tagungen/dgg2002/sessions_authors.html[15.04.16 10:41:07] DGG 2002 Berhorst, A. MGP07 Berndt, H. SM02 Berthold, S. BPP04 Bethmann, F. SOP19 Bialas, J. MGP01 , MGP09 , MGP08 , MG14 , MG15 Binot, F. GE13 Björnsson, A. EMP01 Blake, T.A. GDP05 Blaschek, R. EMP06 Boatwright, J.L. SOP03 Bock, G. SO09 , SO12 , SOP03 , GDP06 , GD13 , GDP04 , SO03 Bohlen, T. SMP05 , MG03 , MGP02 Bohm, M. SOP41 , SOP42 Bohnhoff, M. BP05 , SO18 Bohrmann, G. MG01 Bokelmann, G. GDP04 Borm, G. SMP05 Bormann, P. SOP02 , SOP03 , SOP04 , SOP01 , SOP11 , SOP07 , SOP05 Brüstle, W. SO15 Bram, K. SMP05 Braunmiller, J. SO04 Breitzke, M. MGP01 Bribach, J. SMP01 , SOP05 Brietzke, G. SOP18 Broser, A. MGP09 Bruhn, B. SOP41 Bruhn, C. SOP42 Buckup, K. BP02 Buckup, M. BP02 Buckup, P. BP02 Budweg, M. GDP06 Budzinski, D. UIP01 Buness, H. MS06 Burkhardt, H. EMP04 , BPP03 Buske, M. GD01 Buttkus, B. VUP02 Byrdina, S. VU01 Canty, M. SOP28 Casten, U. HG02 Ceranna, L. SO18 Charvis, P. MGP08 http://dgg-online.de/tagungen/dgg2002/sessions_authors.html[15.04.16 10:41:07] DGG 2002 Choy, G. SOP03 Christensen, U. GD01 , MA01 , MA03 Clauser, C. GR03 , BPP05 , GR01 , HG08 Collot, J. Y. MGP08 Commer, M. EM05 , VU04 , EMP07 Cooper, R. SM07 Dahl-Jensen, T. GDP07 Dahm, T. SM12 , SOP43 Damm, V. EM07 Danckwardt, E. GE07 , GE08 Dannowski, A. HG07 Danuor, S. K. GDP02 Davis, E.E. BP03 Dawes, G. EMP02 DeNil, D. UIP04 Deetjen, H. GR01 , HG08 Demetrescu, C. GRP01 , GR02 Deneke, E. MG18 Dietrich, K. SO19 Dietrich, P. UI01 , GE01 Djajadihardja, Y. MG17 Doan Van Tuyen AGP03 Dobrica, V. GRP01 , GR02 Dole, J. MGP07 Dost, B. SOP10 Drozdzewski, G. SOP30 Druivenga, G. SMP05 Duennebier, F. GDP05 Durst, H. SMP10 Eagles, G. MGP12 Ebbing, J. GG02 Eberle, D. GR04 , HGP04 Edeler, H. EM11 Edwards, N. EM10 , EM12 Einarsson, P. SO16 Eisenblätter, J. UIP01 , UIP02 , UIP03 , SM12 Eisenburger, D. EM07 , EM08 Eisenreich, M. AGP02 , UI04 El-Kelani, R. GDP12 , GDP10 , GDP09 , GD12 Endrun, B. SOP15 , SO18 Ene, M. GRP01 http://dgg-online.de/tagungen/dgg2002/sessions_authors.html[15.04.16 10:41:07] DGG 2002 Engdahl, E.R. SOP02 Engelhard, L. BPP03 Enns, A. GD08 Ewald, M. SOP32 Exß, J. SOP17 , SOP16 Füllekrug, M. MA10 Faber, E. VUP03 , VUP02 Fedorova, T. GD05 Fekete, N. MGP08 Fieberg, F.C. MA06 , MA11 Fiedler-Volmer, R. EMP04 Fischer, D. SMP05 Fischer, K. D. SOP16 , SOP17 Fischer, T. SO06 Flüh, E.R. MGP07 , MGP08 , SM03 , MGP13 , MGP14 , MG13 Flechsig, C. VUP01 , VU06 Fleige, H. UIP09 Fohrmann, M. SMP06 Forbriger, T. SM13 , GD04 Frank, A. SMP05 Franke, A. GEP01 Franke, D. MGP06 , MGP05 , MG11 , MG12 Fraser-Smith, A. C. MA10 Friborg, R. HG01 Friedel, S. GEP02 , GE05 , VU01 Friederich, W. SO10 Friedlein, V. SOP30 Frieslander, U. GDP08 Fruehn, J. SM05 Fuis, G. S. SMP08 Funke, S. SO10 Furche, M. BPP06 Futterer, B. GEP05 Fyen, J. SOP09 Gómez, D. VUP02 Götze, H.-J. GG03 , GG01 Günther, Th. GEP04 Gabriel, G. HGP03 , HG03 Gaedicke, Ch. MG17 Gaensicke, H. SOP22 Garcon, G. VUP03 http://dgg-online.de/tagungen/dgg2002/sessions_authors.html[15.04.16 10:41:07] DGG 2002 Gardei, A. UI07 Garfunkel, Z. GDP09 Gaw, V. MGP03 Gebrande, H. SMP05 Gemail, Kh. UI03 Geschwinde, M. AGP01 Gestermann, N. SOP24 Gierse, G. SM01 Giese, R. SMP05 Goertz, A. SMP07 Gohl, K. MGP12 Goldbeck, J. HGP05 Golden, S. EMP01 Grünthal, G. SO03 Graupner, S. VU09 Gregersen, S. GDP07 Greinwald, S. VUP05 , VUP02 Grevemeyer, I. GD07 , MG13 Grinat, M. GE13 Grosfeld, K. MG02 Grosser, H. SOP03 Gundelach, V. EM08 Gutdeutsch, R. SOP14 Höhne, F. GR01 , HG08 Hölz, S. EMP04 Hördt, A. EMP06 , VU04 Haak, V. GDP11 Haas, C. EM13 , EM11 Haberland, C. GDP12 , GDP10 , MGP10 , SOP40 Hainzl, S. SO06 Hampel, A. MGP09 , MG14 , MG15 Han, D.-H. BP01 Hanka, W. GD13 , SOP07 , GDP07 Hanstein, T. EMP05 Haris, A. SM03 Harjes, H.-P. BP04 , BP05 , SOP15 , SO19 , SO18 Harms, F.-J. MS01 Hartmann, A. GR03 , GR01 , HG08 Hartmann, G. SO25 , SOP25 Hasenclever, J. SMP05 Hauck, C. UIP05 , GE10 http://dgg-online.de/tagungen/dgg2002/sessions_authors.html[15.04.16 10:41:07] DGG 2002 Hauksson, E. SMP08 Havskov, J. SOP10 , SOP08 Heesemann, M. BP03 Heinse, R GE07 Helbig, K. VU01 Hellweg, M. VUP04 , VU09 , VUP02 Helwig, S. VU03 , EMP05 , VU04 , EMP07 , EM06 Hemmann, A. SO05 Henger, M. SOP24 , SO25 Henke, C.H. KO04 Hergarten, S. UI08 Hertrich, M. HGP05 Hertweck, Th. SM04 Hese, F. GG01 Hesser, J. UIP03 Heuer, B. SOP36 Hildenbrand, T. G. SMP08 Hinz, K. MGP05 , MG11 , MGP04 Hinzen, K.-G. SOP32 , SO01 , SOP31 Hoffmann, N. EM02 , EM01 Hoffmann, R. GE01 Hofmann, R. BP01 Hofstetter, A. SO12 , GD13 Hoinkis, H. AGP01 Holcomb, L.G. SOP07 Holme, R. MA09 , MA05 Horejschi, L. EM02 , EM01 Horn, F. GDP07 Hort, M. VU02 , GD09 , VU07 Huebscher, C. MG15 Hunfeld, U. SOP24 Ibrahim, Sh. UI03 Iffland, J. BPP05 Igel, H. SOP18 , SOP32 , SMP06 , SOP23 , SOP20 , SOP19 , SOP21 , SOP39 Ismail-Zadeh, A. GD11 Jäckel, K.-H. SMP01 Jäger, Ch. SM04 Jödicke, H. EM02 , EM01 , MG07 Jacob, A.W.B. GDP05 Jacobs, F GE08 Jacobs, F. GS02 , BPP02 , UIP07 , VUP01 http://dgg-online.de/tagungen/dgg2002/sessions_authors.html[15.04.16 10:41:07] DGG 2002 Jacoby, W.R. GD05 , GD10 , GS07 , MS07 , MS05 Jahnke, G. SMP06 , SOP20 Jahr, T. UIP06 Janle, P. GDP02 Jansen, D. GE09 Jaya, M. UIP05 Jegen, M. EM10 , EM12 Jenett, M. EM07 Jensen, S. L. SO04 Jokat, W. MG08 , MGP04 , MG09 , MG10 Jones, I.F. SM05 Jordan, M. SO13 Joswig, M. SO20 Jung, A. GDP11 Junge, A. EMP01 , EMP02 , GE14 , EM03 Just, A. GE07 , BPP02 Kück, J. SMP05 Kühn, M. BPP05 Kürschner, D. GE07 Kaiser, D. SOP14 , UIP06 Kampke, A. AGP01 Kapinos, G. MG07 Karp, T. GDP02 Kaselow, A. SMP07 Kaufmann, G. GD06 Kendall, J.-M. SMP04 Kesten, D. GDP08 Kiesl, C. KO02 Kind, R. SO09 , SOP02 , SO22 , SO11 , GD13 , GDP05 , GDP07 , SO21 , SO24 Kirsch, R. GR04 , HG01 , HG03 Kito, T. SO23 Klaeschen, D. SM03 , MGP13 , MGP14 Klaucke, I. MG01 Klein, G. MG03 , MGP02 Klemann, V. GDP01 Klemperer, S. GDP04 Klinge, K. SOP36 , SOP25 , SOP11 , SO08 Knabenbauer, O. SO18 Knieß, R. GE08 Koch, K. SO26 , SOP27 , SO14 , SOP26 Koch, M. HG06 , SO26 http://dgg-online.de/tagungen/dgg2002/sessions_authors.html[15.04.16 10:41:07] DGG 2002 Koch, O. VU03 Koelle, A. SM05 Kopera, J.R. SO27 Korn, M. GS02 Kosim BP08 Kottke, B. BP09 , MG04 Krüger, F. SOP42 , SO23 , SO08 Krüger, O. H. SM08 , SMP03 Krüger, U. BPP01 Krüger-Reimer, B. HG06 Kradolfer, U. SOP27 Krajewski, P. KO01 Krause, M. UI07 Krawczyk, C. GDP13 Kreutzmann, A. EMP02 , GD03 Krieger, M.H. KO04 Kruschwitz, S. UIP10 Kruspe, T. KO02 Kugler, S. MG03 , MGP02 Kukowski, N. MGP09 , MG14 , MG15 Kulenkampff, J. BPP02 , UIP07 Kummerow, J. SO11 Kurz, G UIP07 Kutzner, C. MA01 Kvaerna, T. SOP09 Lück, E. AGP02 , UI04 Lühr, H. MA08 , MA09 Lüschen, E. SMP05 Lahrmann, B. MG07 Lange, G. , HGP02 , HGP05 Lange, M. A. MG02 Larsen, T.B. GDP07 Lee, W.H.K. GS01 Lehmann, K. SOP30 Leitchenkov, G. MGP04 Lentz, H. EM07 Leven, M. BP07 , BP06 Leydecker, G. SO27 Li, X. GDP05 Li, Y. GE02 , GE03 Lindner, H. BP08 http://dgg-online.de/tagungen/dgg2002/sessions_authors.html[15.04.16 10:41:07] DGG 2002 Lobach, J. EM11 Lorenzani, S. GD02 Lowe, C. GD10 Lutter, W. J. SMP08 Müller, B. GD11 Müller, C. MS07 , MG19 Müller, K. SM02 , MG20 Müller, M. BPP01 , UIP13 , UI02 Maercklin, N. GDP12 , GDP10 Maierhofer, Ch. UI07 Manthei, G. UIP02 , SM12 Marquart, G. GD04 , GDP03 Martin, R. EMP07 Martin, S. MGP10 Maus, S. MA08 Mayer, P. MGP15 McIntosh, K. MGP07 Meßinger, J. EM09 Meier, T. SO19 , SO18 Meister, J. Dr. SM02 Meyer, H. MGP06 , MG18 , MGP05 , MG17 Meyer, H.G. MGP15 Meyer, U. GDP02 Milkereit, B. GDP02 Mittag, R. SOP35 Mohnke, O. HGP02 , UIP13 Mohsen, A. SO12 , GD13 Moise, E. UIP07 Moran, C. VUP03 Morgan, J. P. GD09 , SOP21 Mosegaard, K. GDP07 Murphy, J. M. SMP08 Musson, R.M.W. SOP12 Mykkeltveit, S. SOP09 Neben, S. MG18 , MG17 , MG19 , MG11 , MG12 Neunhöfer, H. GS04 Newman, G. A. EM05 Nicolaus, M. MG02 Niederleithinger, E. UIP11 , UI07 Niehuus, K. GD04 Nigbor, R.L. SOP07 http://dgg-online.de/tagungen/dgg2002/sessions_authors.html[15.04.16 10:41:07] DGG 2002 Nipp, H.K. UIP03 Nissen-Meyer, T. SOP20 Noppel, H. UIP05 Oelsner, Chr. UI03 Oeser, J. GE06 Ogunade, S.O. MA06 Ohrnberger, M. SOP31 , VU05 Ojeda, A. SO04 Okaya, D. A. SMP08 , SMP05 Olejniczak, R. MA03 Oncken, O. GDP13 Ortega, A. VUP05 , VUP02 Ottemöller, L.
Load more

Recommended publications
  • High-Resolution Animated Tectonic Reconstruction of the South Pacific and West Antarctic Margin
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Electronic Publication Information Center Article Geochemistry 3 Volume 5, Number 7 Geophysics 10 July 2004 Q07002, doi:10.1029/2003GC000657 GeosystemsG G ISSN: 1525-2027 AN ELECTRONIC JOURNAL OF THE EARTH SCIENCES Published by AGU and the Geochemical Society High-resolution animated tectonic reconstruction of the South Pacific and West Antarctic Margin Graeme Eagles and Karsten Gohl Alfred Wegener Institute for Polar and Marine Research, Postfach 120161, D-27515 Bremerhaven, Germany ([email protected]) Robert D. Larter British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK [1] An animated reconstruction shows South Pacific plate kinematics between 90 and 45 Ma, using the satellite-derived gravity anomaly field, interpolated isochrons and plate rotation parameters from both published and new work on marine geophysical data. The Great South Basin and Bounty Trough, New Zealand, are shown as the earliest Pacific–Antarctic plate boundary that opened before 83 Ma. The earliest true Pacific–Antarctic seafloor formed within the eastern parts of this boundary, but later and farther west, seafloor formed within its Antarctic flank. After 80 Ma, the Bellingshausen plate converged with an oceanic part of the Antarctic plate to its east, while its motion simultaneously caused rifting in continental Antarctica to the south. The Pacific–Bellingshausen spreading center developed a set of long offset transform faults that the Pacific–Antarctic plate boundary inherited around chron C27 when the Bellingshausen plate ceased to move independently as part of a Pacific- wide plate tectonic reorganization event.
    [Show full text]
  • Tectonic Evolution of the Pacific Margin of Antarctica 2. Structure Of
    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 107, NO. B12, 2346, doi:10.1029/2002JB001897, 2002 Tectonic evolution of the Pacific margin of Antarctica 2. Structure of Late Cretaceous–early Tertiary plate boundaries in the Bellingshausen Sea from seismic reflection and gravity data Alex P. Cunningham,1 Robert D. Larter, and Peter F. Barker British Antarctic Survey, Natural Environment Research Council, Cambridge, England, UK Karsten Gohl and Frank O. Nitsche2 Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany Received 27 March 2002; revised 13 April 2002; accepted 9 May 2002; published 13 December 2002. [1] Interpretations of multichannel seismic (MCS) reflection and potential field data suggest that some prominent gravity anomalies in the Bellingshausen Sea are associated with plate boundaries that were active during the Late Cretaceous and early Tertiary. Between 83° and 93°W, a belt of negative anomalies extends along the West Antarctic continental slope, which we term the continental slope gravity anomaly (CSGA). MCS profiles show that the CSGA coincides with an acoustically opaque structural high imaged beneath the lower slope. We interpret this structure as the upper part of an accretionary prism which formed during southward subduction of the Phoenix and Charcot plates, before Chatham Rise separated from West Antarctica. MCS profiles crossing the same margin to the northeast show no evidence of an extensive buried accretionary prism, but instead reveal an abrupt northeastward steepening of the continental slope near 78°W. We attribute this change in tectonic style, at least in part, to subduction erosion resulting from subduction of rough oceanic basement which formed at the Antarctic-Phoenix ridge after an abrupt decrease in spreading rate at chron 23r (52 Ma).
    [Show full text]
  • Abbot Ice Shelf, Structure of the Amundsen Sea Continental 10.1002/2014GC005570 Margin and the Southern Boundary of the Bellingshausen Plate
    PUBLICATIONS Geochemistry, Geophysics, Geosystems RESEARCH ARTICLE Abbot Ice Shelf, structure of the Amundsen Sea continental 10.1002/2014GC005570 margin and the southern boundary of the Bellingshausen Plate Key Points: seaward of West Antarctica Abbot Ice Shelf is underlain by E-W rift basins created at 90 Ma James R. Cochran1, Kirsty J. Tinto1, and Robin E. Bell1 Amundsen shelf shaped by subsidence, sedimentation, and 1Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, USA passage of the ice sheet Bellingshausen plate boundary is located near the base of continental Abstract Inversion of NASA Operation IceBridge airborne gravity over the Abbot Ice Shelf in West Ant- slope and rise arctica for subice bathymetry defines an extensional terrain made up of east-west trending rift basins formed during the early stages of Antarctica/Zealandia rifting. Extension is minor, as rifting jumped north of Correspondence to: J. R. Cochran, Thurston Island early in the rifting process. The Amundsen Sea Embayment continental shelf west of the [email protected] rifted terrain is underlain by a deeper, more extensive sedimentary basin also formed during rifting between Antarctica and Zealandia. A well-defined boundary zone separates the mildly extended Abbot extensional Citation: terrain from the deeper Amundsen Embayment shelf basin. The shelf basin has an extension factor, b,of Cochran, J. R., K. J. Tinto, and R. E. Bell 1.5–1.7 with 80–100 km of extension occurring across an area now 250 km wide. Following this extension, (2015), Abbot Ice Shelf, structure of the Amundsen Sea continental margin and rifting centered north of the present shelf edge and proceeded to continental rupture.
    [Show full text]
  • Late Cretaceous to Early Tertiary Subduction History of the Antarctic Peninsula
    Journal of the Geological Society, London, Vol. 155, 1998, pp. 255–268. Printed in Great Britain. Late Cretaceous to early Tertiary subduction history of the Antarctic Peninsula JOE J. McCARRON1,2 & ROBERT D. LARTER1 1British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK (e-mail: [email protected]) 2Present address: Companias Shell de Colombia, c/o Expat Mail, Postbus 245, 2501 CE Den Haag, The Netherlands Abstract: Quantitative estimates of the rates and azimuths of Phoenix plate convergence with the Antarctic Peninsula have been derived from plate rotation calculations for two periods in the Late Cretaceous and early Tertiary (83.0–67.7 and 61.1–53.4 Ma). Published marine magnetic anomaly identifications and ‘flow lines’ interpreted from gravity anomaly maps were used in simple spherical geometry calculations to derive Phoenix–Pacific stage rotations. These were combined with published Pacific–Antarctic rotation data to determine contemporaneous Phoenix–Antarctic stage rotations. The results indicate a significant change in azimuths of relative motion between the Late Cretaceous and early Tertiary. Late Cretaceous, and perhaps earlier, oblique subduction probably caused migration of fore-arc slivers along the margin, resulting in variations in width of the accretionary prism. Comparison between synthetic magnetic profiles and a 900 km long magnetic profile across ocean floor produced at the Antarctic–Phoenix ridge during the early Tertiary establishes the time of a major decrease in spreading rate, and hence also in convergence rate, as chron C23r (52.3 Ma). The associated change in subduction dynamics may have caused the dextral transtensional deformation observed in the George VI Sound region and initiated uplift of blueschist facies rocks now exposed on Smith Island.
    [Show full text]
  • Sopacmaps Project, Final Report, North New Hebrides Back Arc Area
    EXECUTIVE SUMMARY (SDPRC) I EXECUTIVE SUMMARY I The SOPACMAPS Project was designed to investigate as much area as possible of the EEZs of the SOPAC member countries: Solomon Islands, Vanuatu, Fiji and Tuvalu.The main objectives were to map the bathymetry, investigate the resource potential and to study geological processes, including geological hazards. A total area of approximately 730,000 km2 was mapped during a total of 87 days at sea, using the Dual Multibeam Swath echo sounder on the research vessel l/Atalante, operated by IFREMER under contract to SOPAC and funded by the European Union. The data are a very important source of information for the understanding of the nature of the seafloor of the South Pacific, and establish an understanding of seafloor process and resources at a level which could not have been imagined as recently as 20 years ago. During the three legs of 29 days each, multibeam (bathymetry and acoustic imagery), 6- channel reflection seismic, magnetics, gravimetry and sub-bottom profiler data were collected along 439 profiles totalling 15,680 nautical miles. All data are of very fair to excellent quality. Preliminary reports and on-board processed charts at 1:250,000 scale were delivered to SOPAC shortly after each leg. Reprocessing of the data by IFREMER produced several sets of charts: navigation, bathymetry and acoustic imaging at 1:250,000 scale, and bathymetry, acoustic imaging and morpho-structural interpretation at 1:500,000 scale. Interpretation of the data, conducted for SOPAC by IFREMER and ORSTOM, produced comprehensive fmal reports focused on eight areas: - Central Solomon Trough, - Malaita Area, - Melanesian Arc Gap Area, - North New Hebrides Back Arc Area, - New Hebrides Intra-Arc Basin, - Pandora Bank Area, - Alexa/Charlotte Banks Area, - South Tuvalu Banks Area.
    [Show full text]
  • Jul 2 8 1985 the Second Prospectus for Western Pacific Dril
    JUL 2 8 1985 THE SECOND PROSPECTUS FOR WESTERN PACIFIC DRIL At its June 1986 meeting, the Western Pacific Panel revised its first'WPAC'drilTiTig- prospectus in the light of comments from the three thematic panels and after considering 14 new/revised proposals. The panel agreed on 10 1/2 legs that can be strongly defended at this time and ranked these legs by vote (see below). This report provides sumiraries of the 10 1/2 legs. The panel expects the process of program redefinition to cdritinue through 1987 as better proposals are received and better data syntheses and scientific models are reviewed. Leg Vote Thematic Relevant Site Survey Existing Cruises (11) Blessings Proposals Needs Data Workup Scheduled (Proposed) 1. Bonin-1 9.8 LITHP,TECP 171, more MCS JNOC MCS ALVIN-7^87^^ Workshop (83) needed GSJ 87 'MGG;/ (Taylor^iMC^) 2. Japan Sea 8.6 SOHP.LITHP 51 + / Shinkai 86 TECP JTB ORI 87 MGG 3. 7.6 TECP 242 more MCS (Silver Mns)'* Backthrusting 4. Banda-Sulu- 7.2 SOHP,(TECP) 27,46, digital SCS (Silver SCS) South China 82,131, (Banda) 147,154 5. Bonin- 6.1 LiraP,TECP 171,172 more MCS / ALVIN 6/87' Mariana-2 Workshop (83) Mariana SCS (Taylor.MCS) 5. Great Barrier 6.1 SOHP 206 crossing Co. MCS BMR 6-9/87 Reef Workshop MCS needed MCS + 7. Nankai 6.0 TECP 50 Japex MCS ORI 86 MCS 128/F / needed (Shipley 2-ship) 8. Lau Basin 5.8 LITHP, TECP 189,220 ? First integrate 5 BGR 2-4/87.
    [Show full text]
  • Climate Related and Bottom Controlled Sedimentation History Of
    Glacially related and bottom current controlled sedimentation processes on the West Antarctic continental margin –Interpretations derived from seismic reflection investigations Carsten Scheuer Dissertation zur Erlangung des Doktorgrades der Naturwissenschaften vorgelegt dem Fachbereich Geowissenschaften (FB 5) der Universität Bremen Bremerhaven, März 2006 _________________________________________________________ Alfred-Wegener Institut für Polar- und Meeresforschung ABSTRACT The advances and retreats of grounded ice on the Antarctic continental shelf during glacial- interglacial cycles led to the deposition of large sediment deposits. Depositional patterns on the continental slope and rise reflect interactions between the effects of ice sheet fluctuations, mass transport processes and bottom currents. The central element of this thesis is the study of the late Cenozoic glacial history of the South Pacific continental margin of West Antarctica by interpreting the record of marine sediments there, with focus on the sedimentary successions of the outer continental shelf, slope and rise. The thesis presents the results of seismic stratigraphic analyses of multi-channel and single channel seismic reflection profiles collected on the continental margin during the course of several cruises since 1986. Seismic stratigraphic patterns are interpreted with reference to recent sedimentation models in order to differentiate between pre-glacial and glacially-influenced sediment units. In contrast to previous studies, the production and interpretation of one previously unpublished along slope seismic profile enabled the correlation of seismic units along the entire continental margin of the western Antarctic Peninsula and the Bellingshausen Sea and, thus, an evaluation of terrigenous sediment supply and distribution. Furthermore, correlation of reflectors with downhole results at the ODP Leg 178 drill sites allows the development of an age related sedimentation model and estimates of sediment deposition rates.
    [Show full text]
  • High-Resolution Animated Tectonic Reconstruction of the South Pacific and West Antarctic Margin
    Article Geochemistry 3 Volume 5, Number 7 Geophysics 10 July 2004 Q07002, doi:10.1029/2003GC000657 GeosystemsG G ISSN: 1525-2027 AN ELECTRONIC JOURNAL OF THE EARTH SCIENCES Published by AGU and the Geochemical Society High-resolution animated tectonic reconstruction of the South Pacific and West Antarctic Margin Graeme Eagles and Karsten Gohl Alfred Wegener Institute for Polar and Marine Research, Postfach 120161, D-27515 Bremerhaven, Germany ([email protected]) Robert D. Larter British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK [1] An animated reconstruction shows South Pacific plate kinematics between 90 and 45 Ma, using the satellite-derived gravity anomaly field, interpolated isochrons and plate rotation parameters from both published and new work on marine geophysical data. The Great South Basin and Bounty Trough, New Zealand, are shown as the earliest Pacific–Antarctic plate boundary that opened before 83 Ma. The earliest true Pacific–Antarctic seafloor formed within the eastern parts of this boundary, but later and farther west, seafloor formed within its Antarctic flank. After 80 Ma, the Bellingshausen plate converged with an oceanic part of the Antarctic plate to its east, while its motion simultaneously caused rifting in continental Antarctica to the south. The Pacific–Bellingshausen spreading center developed a set of long offset transform faults that the Pacific–Antarctic plate boundary inherited around chron C27 when the Bellingshausen plate ceased to move independently as part of a Pacific- wide plate tectonic reorganization event. Southwest of these transforms the Pacific–Antarctic Ridge saw an increase in transform-fault segmentation by 58 Ma. One of the long offset Pacific– Bellingshausen transforms, referred to as ‘‘V,’’ was modified during the C27 reorganization event when a Pacific–Antarctic–Phoenix triple junction initiated on its southern edge.
    [Show full text]
  • History of the Cretaceous Osbourn Spreading Center Nathan J
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Caltech Authors - Main JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 112, B04102, doi:10.1029/2006JB004550, 2007 Click Here for Full Article History of the Cretaceous Osbourn spreading center Nathan J. Downey,1 Joann M. Stock,1 Robert W. Clayton,1 and Steven C. Cande2 Received 7 June 2006; revised 5 October 2006; accepted 1 November 2006; published 6 April 2007. [1] The Osbourn Trough is a fossil spreading center that rifted apart the Manihiki and Hikurangi Plateaus during Cretaceous time. Previous models of the Osbourn spreading center are based on data collected near the trough axis, and therefore only constrain the history of the Osbourn spreading center during the last few Ma of spreading. Our data set includes multibeam data collected northward to the Manihiki Plateau, allowing us to examine seafloor morphology created during the entire active period of the Osbourn spreading center, as well as several additional multibeam data sets that provide the opportunity to examine the relationship between the Osbourn paleospreading center and the Cretaceous Pacific-Phoenix ridge. The axial gravity of the trough is similar to the gravity found at other extinct slow-intermediate spreading rate ridges. Magnetic field measurements indicate that spreading at the trough ceased during Chron C34. Abyssal-hill trends indicate that spreading during the early history of the Osbourn spreading center occurred at 15°–20°. The east-west component of this spreading explains the modern east- west offset of the Manihiki and Hikurangi Plateaus. Spreading rotated to 2°–5° prior to extinction.
    [Show full text]
  • Tectonic Evolution of the Pacific Margin of Antarctica 1. Late Cretaceous Tectonic Reconstructions Robert D
    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 107, NO. B12, 2345, doi:10.1029/2000JB000052, 2002 Tectonic evolution of the Pacific margin of Antarctica 1. Late Cretaceous tectonic reconstructions Robert D. Larter, Alex P. Cunningham,1 and Peter F. Barker British Antarctic Survey, Natural Environment Research Council, Cambridge, UK Karsten Gohl and Frank O. Nitsche2 Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany Received 10 November 2000; revised 11 April 2002; accepted 13 June 2002; published 13 December 2002. [1] We present new Late Cretaceous tectonic reconstructions of the Pacific margin of Antarctica based on constraints from marine magnetic data and regional free-air gravity fields. Results from interpretation of new seismic reflection and gravity profiles collected in the Bellingshausen Sea are also incorporated in the reconstructions. The reconstructions show regional constraints on tectonic evolution of the Bellingshausen and Amundsen Seas following the breakup between New Zealand and West Antarctica. The breakup began at c. 90 Ma with the separation of Chatham Rise, probably accompanied by the opening of the Bounty Trough. Campbell Plateau separated from West Antarctica later, during chron 33r (83.0–79.1 Ma). A free-air gravity lineation northeast of Chatham Rise represents the trace of a triple junction that formed as a result of fragmentation of the Phoenix plate a few million years before Chatham Rise separated from West Antarctica. Remnants of the western fragment, the Charcot plate, are preserved in the Bellingshausen Sea. Subduction of the Charcot plate stopped before 83 Ma, and part of it became coupled to the Antarctic Peninsula across the stalled subduction zone.
    [Show full text]