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  • 2010-2014  (5)
  • 2010  (5)
Keywords
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Years
  • 2010-2014  (5)
Year
  • 1
    In: Expedition Erde, Bremen : MARUM - Zentrum für Marine Umweltwissenschaften, 2010, (2010), Seite 136-143, 9783000307720
    In: year:2010
    In: pages:136-143
    Type of Medium: Article
    Pages: zahlr. Ill. (farb.), graph. Darst., Kt.
    Language: German
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  • 2
    In: Expedition Erde, Bremen : MARUM - Zentrum für Marine Umweltwissenschaften, 2010, (2010), Seite 80-89, 9783000307720
    In: year:2010
    In: pages:80-89
    Type of Medium: Article
    Pages: zahlr. Ill. (farb.), graph. Darst., Kt.
    Language: German
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  • 3
    Publication Date: 2019-06-28
    Description: A 1.6 km riser borehole was drilled at site C0009 of the NanTroSEIZE, in the center of the Kumano forearc basin, as a landward extension of previous drilling in the southwest Japan Nankai subduction zone. We determined principal horizontal stress orientations from analyses of borehole breakouts and drilling-induced tensile fractures by using wireline logging formation microresistivity images and caliper data. The maximum horizontal stress orientation at C0009 is approximately parallel to the convergence vector between the Philippine Sea plate and Japan, showing a slight difference with the stress orientation which is perpendicular to the plate boundary at previous NanTroSEIZE sites C0001, C0004 and C0006 but orthogonal to the stress orientation at site C0002, which is also in the Kumano forearc basin. These data show that horizontal stress orientations are not uniform in the forearc basin within the surveyed depth range and suggest that oblique plate motion is being partitioned into strike-slip and thrusting. In addition, the stress orientations at site C0009 rotate clockwise from basin sediments into the underlying accretionary prism.
    Type: Article , PeerReviewed
    Format: text
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  • 4
    Publication Date: 2021-03-29
    Description: To understand seismogenesis in shallow parts of subduction zones, it is vital to know about strength and frictional parameters of subducted sediment. For this purpose, PETROTEC, as part of the TIPTEQ-Project, gathers geotechnical data for sediments deposited on the incoming Nazca Plate, the trench and the slope off the southern Chilean coast during the last 5 Ma, and whose equivalents are now being underthrusted into the seismogenic zone beneath South America. Material comes from gravity cores collected during R/V SONNE Cruises SO181 (Flüh E. & Grevemeyer I (Editors) 2005), SO102 (Hebbeln D, Wefer G, et al. 1995) and SO156 (Hebbeln D, et al. 2001), as well as from ODP Leg 141 (Behrmann JH, et al. 1992) drill cores. Sediment strength and frictional properties are determined by triaxial testing, ring shear testing and direct shear testing...
    Description: conference
    Keywords: 551 ; VAT 210 ; VBP 100 ; VBP 400 ; VAE 130 ; VKB 311 ; Untersuchungsverfahren mariner Sedimente {Geologie} ; Methodik, Untersuchungsverfahren und Instrumente {Ingenieurgeologie} ; Felsmechanik, Gebirgsmechanik, Gebirgsdruck ; Geomechanik ; Untersuchungsmethoden und Probennahme im Gelände {Sedimentologie} ; Chile ; Kontinentalrand ; Konturit ; Gesteinsmechanik
    Language: German
    Type: anthologyArticle , publishedVersion
    Format: application/pdf
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  • 5
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    PANGAEA
    In:  Supplement to: Stark, Nina; Hanff, Hendrik; Svenson, C; Ernstsen, Verner Brandbyge; Lefebvre, Alice; Winter, Christian; Kopf, Achim J (2011): Coupled penetrometer, MBES and ADCP assessments of tidal variations in surface sediment layer characteristics along active subaqueous dunes, Danish Wadden Sea. Geo-Marine Letters, 31(4), 249-258, https://doi.org/10.1007/s00367-011-0230-6
    Publication Date: 2023-04-20
    Description: In-situ geotechnical measurements of surface sediments were carried out along large subaqueous dunes in the Knudedyb tidal inlet channel in the Danish Wadden Sea using a small free-falling penetrometer. Vertical profiles showed a typical stratification pattern with a resolution of ~1 cm depicting a thin surface layer of low sediment strength and a stiffer substratum below (quasi-static bearing capacity equivalent: 1–3 kPa in the top layer, 20–140 kPa in the underlying sediment; thickness of the top layer ca. 5–8 cm). Observed variations in the thickness and strength of the surface layer during a tidal cycle were compared to mean current velocities (measured using an acoustic Doppler current profiler, ADCP), high-resolution bathymetry (based on multibeam echo sounding, MBES) and qualitative estimates of suspended sediment distributions in the water column (estimated from ADCP backscatter intensity). The results revealed an ebb dominance in sediment remobilization, and a general accretion of the bed towards low water. A loose top layer occurred throughout the tidal cycle, likely influenced by bedload transport and small events of suspended sediment resettlement (thickness: 6 +-2 cm). Furthermore, this layer showed a significant increase in thickness (e.g. from 8 cm to 16 cm) related to periods of overall deposition. These findings imply that dynamic penetrometers can conveniently serve to (1) quantify potentially mobile sediments by determining the thickness of a loose sediment surface layer, (2) unravel sediment strength development in potentially mobile sediments and (3) identify sediment accumulation. Such data are an important complement and add a new geotechnical perspective during investigations of sediment remobilization processes in highly dynamic coastal environments.
    Keywords: Center for Marine Environmental Sciences; Deceleration; Event label; Free fall penetrometer, NIMROD; Knudedyb, Denmark; MARUM; N1; N10; N11; N12; N13; N14; N15; N16; N17; N18; N19; N2; N20; N21; N22; N23; N24; N25; N26; N27; N28; N29; N3; N30; N31; N32; N33; N34; N35; N36; N37; N38; N39; N4; N40; N41; N42; N43; N44; N45; N46; N47; N48; N49; N5; N50; N51; N52; N53; N54; N55; N56; N57; N58; N59; N6; N60; N61; N62; N63; N64; N65; N66; N67; N68; N69; N7; N70; N71; N72; N73; N74; N75; N76; N77; N78; N79; N8; N80; N81; N82; N83; N88; N89; N9; N90; N91; N92; N94; N95; N96; N97; NIM; NIMROD; Penetration depth; Penetration velocity; Senckenberg; Senckenberg_11_2008; Senckenberg_11_2008_N1; Senckenberg_11_2008_N10; Senckenberg_11_2008_N11; Senckenberg_11_2008_N12; Senckenberg_11_2008_N13; Senckenberg_11_2008_N14; Senckenberg_11_2008_N15; Senckenberg_11_2008_N16; Senckenberg_11_2008_N17; Senckenberg_11_2008_N18; Senckenberg_11_2008_N19; Senckenberg_11_2008_N2; Senckenberg_11_2008_N20; Senckenberg_11_2008_N21; Senckenberg_11_2008_N22; Senckenberg_11_2008_N23; Senckenberg_11_2008_N24; Senckenberg_11_2008_N25; Senckenberg_11_2008_N26; Senckenberg_11_2008_N27; Senckenberg_11_2008_N28; Senckenberg_11_2008_N29; Senckenberg_11_2008_N3; Senckenberg_11_2008_N30; Senckenberg_11_2008_N31; Senckenberg_11_2008_N32; Senckenberg_11_2008_N33; Senckenberg_11_2008_N34; Senckenberg_11_2008_N35; Senckenberg_11_2008_N36; Senckenberg_11_2008_N37; Senckenberg_11_2008_N38; Senckenberg_11_2008_N39; Senckenberg_11_2008_N4; Senckenberg_11_2008_N40; Senckenberg_11_2008_N41; Senckenberg_11_2008_N42; Senckenberg_11_2008_N43; Senckenberg_11_2008_N44; Senckenberg_11_2008_N45; Senckenberg_11_2008_N46; Senckenberg_11_2008_N47; Senckenberg_11_2008_N48; Senckenberg_11_2008_N49; Senckenberg_11_2008_N5; Senckenberg_11_2008_N50; Senckenberg_11_2008_N51; Senckenberg_11_2008_N52; Senckenberg_11_2008_N53; Senckenberg_11_2008_N54; Senckenberg_11_2008_N55; Senckenberg_11_2008_N56; Senckenberg_11_2008_N57; Senckenberg_11_2008_N58; Senckenberg_11_2008_N59; Senckenberg_11_2008_N6; Senckenberg_11_2008_N60; Senckenberg_11_2008_N61; Senckenberg_11_2008_N62; Senckenberg_11_2008_N63; Senckenberg_11_2008_N64; Senckenberg_11_2008_N65; Senckenberg_11_2008_N66; Senckenberg_11_2008_N67; Senckenberg_11_2008_N68; Senckenberg_11_2008_N69; Senckenberg_11_2008_N7; Senckenberg_11_2008_N70; Senckenberg_11_2008_N71; Senckenberg_11_2008_N72; Senckenberg_11_2008_N73; Senckenberg_11_2008_N74; Senckenberg_11_2008_N75; Senckenberg_11_2008_N76; Senckenberg_11_2008_N77; Senckenberg_11_2008_N78; Senckenberg_11_2008_N79; Senckenberg_11_2008_N8; Senckenberg_11_2008_N80; Senckenberg_11_2008_N81; Senckenberg_11_2008_N82; Senckenberg_11_2008_N83; Senckenberg_11_2008_N88; Senckenberg_11_2008_N89; Senckenberg_11_2008_N9; Senckenberg_11_2008_N90; Senckenberg_11_2008_N91; Senckenberg_11_2008_N92; Senckenberg_11_2008_N94; Senckenberg_11_2008_N95; Senckenberg_11_2008_N96; Senckenberg_11_2008_N97
    Type: Dataset
    Format: text/tab-separated-values, 13134 data points
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