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  • PANGAEA  (13)
  • Elsevier  (2)
  • 1990-1994  (15)
Document type
Keywords
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Years
Year
  • 1
    Publication Date: 2016-02-15
    Description: Condensed pelagic deposits characterize the uppermost sediment sequence of the Maud Rise in the eastern Weddell Sea. The comparison of subbottom profiling data with the sediments drilled at two ODP sites shows that Lithologic Unit Ib deposited during late Miocene to late Pliocene times is generally characterized by acoustic transparency. A prominent reflector with strongly increased amplitude (called Reflector “Pc”) occurs within this mainly homogeneous diatom ooze unit and is correlated with the porcellanite horizon found at ODP Site 689. As evidenced by sediment findings, Reflector “Pc” marks a distinct stratigraphic layer of early Pliocene age. The development of the Reflector “Pc” and its amplitude of reflection in the echosounding records is most likely caused by the silica cementation of porcellanite within this layer. The analyses of the sediment echosounder profiles from five R.V. Polarstern cruises make it possible to map the regional distribution of Reflector “Pc”. In large areas of the central Maud Rise, a patchy but also continuous distribution of Reflector “Pc” was found. The reflector does not occur in sediments below 3000 meters of water. On average Reflector “Pc” is detected around 11 and 12 meters below seafloor, but depth occurrence is highly variable within the range of 8 m to more than 18 m. The apparent amplitude of Reflector “Pc” is higher in those areas where the diatom ooze Unit Ib reaches greater thicknesses, which may be caused by local enhanced tectonic subsidence. In general a good correlation of Reflector “Pc” amplitude and thickness of lithologic Unit Ib is observed. This may imply that the diatom ooze Unit Ib serves as a silica source, since the extent of silica cementation of the porcellanite layer is controlled by the amount of dissolved silica supply. Other possible interpretations for silica sources include silica-rich interstitial water ascending from deeper sediment levels using tectonic structures for migration.
    Type: Article , PeerReviewed
    Format: text
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  • 2
    Publication Date: 2016-02-15
    Description: A porcellanite layer, probably younger than 0.6-0.4 Ma, of a nearly monomineralic composition of opal-CT was sampled on the Southwest Indian Ridge during Polarstern cruise ANT-VI/3. The intense cementation of the rock, together with recent findings by the Ocean Drilling Program (Legs 113 and 120) and the occurrence of a unique older porcellanite from Eltanin Core 47-15, provides evidence of very early silica precipitation in pure diatom oozes of the Southern Ocean. Such porcellanites occur in shallowly buried young sediments and provide a contrast to the established concepts of porcellanite formation.
    Type: Article , PeerReviewed
    Format: text
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  • 3
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    PANGAEA
    In:  EPIC3Alfred Wegener Institute for Polar and Marine Research, Bremerhaven., Bremerhaven, PANGAEA
    Publication Date: 2018-08-10
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/pdf
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  • 4
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    PANGAEA
    In:  EPIC3Alfred Wegener Institute for Polar and Marine Research, Bremerhaven., Bremerhaven, PANGAEA
    Publication Date: 2018-08-10
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/pdf
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  • 5
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    PANGAEA
    In:  EPIC3Alfred Wegener Institute for Polar and Marine Research, Bremerhaven., Bremerhaven, PANGAEA
    Publication Date: 2018-08-10
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/pdf
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  • 6
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    PANGAEA
    In:  EPIC3Alfred Wegener Institute for Polar and Marine Research, Bremerhaven., Bremerhaven, PANGAEA
    Publication Date: 2018-08-10
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/pdf
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  • 7
    Publication Date: 2023-07-24
    Keywords: Agulhas Basin; ANT-IX/4; AWI_Paleo; Calcium carbonate; Carbon, organic, total; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; DEPTH, sediment/rock; Element analyser CHN, LECO; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Gravity corer (Kiel type); Mass spectrometer Finnigan MAT 251; Neogloboquadrina pachyderma dextral and/or sinistral, δ13C; Neogloboquadrina pachyderma dextral and/or sinistral, δ18O; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Paleoproductivity as carbon; Polarstern; PP calculated (Müller & Suess, 1979); PP calculated (Stein, 1986); PS18; PS18/238; PS2082-1; SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents
    Type: Dataset
    Format: text/tab-separated-values, 1434 data points
    Location Call Number Limitation Availability
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  • 8
    Publication Date: 2023-11-09
    Keywords: Adercotryma glomeratum; Ammobaculites agglutinans; Ammodiscus spp.; Ammomarginulina ensis; Ammomarginulina foliacea; Ammomarginulina foliacea curvata; Ammoscalaria pseudospiralis; ANT-II/4; ANT-IV/3; ANT-V/4; ANT-VI/3; Astrononion antarcticus; Astrononion echolsi; Astrorhiza sp.; Atka Bay; AWI_Paleo; Bulimina aculeata; Camp Norway; Cassidulina crassa rossensis; Cibicides bertheloti; Cibicides corpulentus; Cibicides grossepunctatus; Cibicides lobatulus; Cibicidoides cf. wuellerstorfi; Cibicidoides spp.; Counting 〉125 µm fraction; Cribrostomoides crassimargo; Cribrostomoides jeffreysii; Cribrostomoides sp.; Cribrostomoides subglobosum; Cyclammina orbicularis; Cyclammina pusilla; Cyclammina trullisata; DEPTH, sediment/rock; Eastern Weddell Sea, Southern Ocean; Eggerella bradyi; Eggerella sp.; Ehrenbergina glabra; Elevation of event; Epistominella exigua; Epistominella vitrea; Event label; Fissurina sp.; Foraminifera, benthic, other; Fursenkoina earlandi; Giant box corer; GKG; Globocassidulina biora; Globocassidulina subglobosa; Glomospira charoides; Gyroidina orbicularis; Gyroidina sp.; Haplophragmoides bradyi; Haplophragmoides sphaeriloculus; Hormosina normani; Hormosina robusta; Kapp Norvegia; Karreriella novangliae; Lagena spp.; Laticarinina pauperata; Latitude of event; Lenticulina spp.; Longitude of event; Martinottiella nodulosa; Melonis zaandamae; Miliammina arenacea; Nonionella bradii; Nonionella iridea; Nuttallides umbonifera; Oridorsalis umbonatus; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Parafissurina spp.; Pelosinella bicaudata; Pelosinella sp.; Polarstern; PS04; PS04/528; PS08; PS08/333; PS08/335; PS08/336; PS08/338; PS08/344; PS08/345; PS08/346; PS08/347; PS08/353; PS08/354; PS08/355; PS08/356; PS08/357; PS08/358; PS08/359; PS08/360; PS08/364; PS08/365; PS08/366; PS08/367; PS08/368; PS08/369; PS08/374; PS08/375; PS08/394; PS08/396; PS08/401; PS08/402; PS08/410; PS08/481; PS08/482; PS08/483; PS10; PS10/694; PS10/697; PS12; PS12/291; PS1224-3; PS1367-1; PS1368-1; PS1369-1; PS1370-1; PS1372-2; PS1373-2; PS1374-2; PS1375-2; PS1377-1; PS1378-1; PS1379-1; PS1380-1; PS1381-1; PS1382-1; PS1383-1; PS1384-1; PS1386-1; PS1387-1; PS1388-1; PS1389-1; PS1390-1; PS1391-1; PS1394-3; PS1395-1; PS1405-1; PS1406-1; PS1410-1; PS1411-1; PS1412-1; PS1426-1; PS1427-1; PS1428-1; PS1481-2; PS1482-2; PS1588-3; Psammosphaera fusca; Pseudobolivina antarctica; Pullenia bulloides; Pullenia simplex; Pullenia subcarinata; Pyrgo depressa; Recurvoides contortus; Reophax bilocularis; Reophax dentaliniformis; Reophax nodulosus; Reophax ovicula; Reophax pilulifer; Reophax spiculifer; Rhabdammina cf. linearis; Rhabdammina spp.; Rhizammina indivisa; Rotaliammina ochracea; Saccammina sphaerica; Saccorhiza ramosa; Subreophax aduncus; Textularia wiesneri; Trifarina angulosa; Triloculina frigida; Tritaxis squamata; Trochammina globulosa; Trochammina nana; Trochammina nitida; Trochammina sp.; Trochammina spp.
    Type: Dataset
    Format: text/tab-separated-values, 3060 data points
    Location Call Number Limitation Availability
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  • 9
    Publication Date: 2023-11-09
    Keywords: Adercotryma glomeratum; Ammobaculites agglutinans; Ammodiscus spp.; Ammomarginulina ensis; Ammomarginulina foliacea; Ammomarginulina foliacea curvata; ANT-II/4; ANT-IV/3; ANT-V/4; ANT-VI/3; Astrononion antarcticus; Atka Bay; AWI_Paleo; Bulimina aculeata; Buliminella cochlea; Camp Norway; Cassidulina laevigata; Cibicides bertheloti; Cibicides corpulentus; Cibicides grossepunctatus; Cibicides lobatulus; Cibicidoides cf. wuellerstorfi; Counting 〉125 µm fraction; Cribrostomoides crassimargo; Cribrostomoides jeffreysii; Cribrostomoides sp.; Cribrostomoides subglobosum; Crithionina spp.; Cyclammina orbicularis; Cyclammina pusilla; DEPTH, sediment/rock; Eastern Weddell Sea, Southern Ocean; Eggerella bradyi; Eggerella sp.; Ehrenbergina glabra; Elevation of event; Epistominella exigua; Epistominella vitrea; Eponides tumidulus; Eponides weddellensis; Event label; Fissurina sp.; Foraminifera, benthic, other; Fursenkoina earlandi; Giant box corer; GKG; Globocassidulina crassa; Globocassidulina subglobosa; Glomospira charoides; Gyroidina sp.; Haplophragmoides bradyi; Haplophragmoides sp.; Haplophragmoides sphaeriloculus; Hippocrepina flexibilis; Hormosina normani; Hormosina robusta; Hyperammina laevigata; Kapp Norvegia; Karreriella novangliae; Lagena spp.; Laticarinina pauperata; Latitude of event; Longitude of event; Marsipella cylindrica; Martinottiella nodulosa; Melonis affinis; Miliammina arenacea; Miliolinella spp.; Miliolinella subrotunda; Nonionella bradii; Nonionella iridea; Nuttallides umbonifera; Oridorsalis sidebottomi; Oridorsalis umbonatus; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Parafissurina spp.; Patellina corrugata; Pelosinella sp.; Polarstern; Portatrochammina spp.; PS04; PS04/528; PS08; PS08/333; PS08/335; PS08/336; PS08/338; PS08/344; PS08/345; PS08/346; PS08/347; PS08/353; PS08/354; PS08/355; PS08/356; PS08/357; PS08/358; PS08/359; PS08/360; PS08/364; PS08/365; PS08/366; PS08/367; PS08/368; PS08/369; PS08/374; PS08/375; PS08/394; PS08/396; PS08/401; PS08/402; PS08/410; PS08/480; PS08/482; PS08/483; PS10; PS10/694; PS10/697; PS12; PS12/291; PS1224-3; PS1367-1; PS1368-1; PS1369-1; PS1370-1; PS1372-2; PS1373-2; PS1374-2; PS1375-2; PS1377-1; PS1378-1; PS1379-1; PS1380-1; PS1381-1; PS1382-1; PS1383-1; PS1384-1; PS1386-1; PS1387-1; PS1388-1; PS1389-1; PS1390-1; PS1391-1; PS1394-1; PS1394-3; PS1395-1; PS1405-1; PS1406-1; PS1410-1; PS1411-1; PS1412-1; PS1425-1; PS1427-1; PS1428-1; PS1481-2; PS1482-2; PS1588-3; Psammosphaera fusca; Pseudobolivina antarctica; Pseudobulimina chapmani; Pullenia bulloides; Pullenia simplex; Pullenia subcarinata; Pyrgo depressa; Pyrgo williamsoni; Quinqueloculina pygmaea; Quinqueloculina sp.; Recurvoides contortus; Reophax bilocularis; Reophax dentaliniformis; Reophax distans; Reophax fusiformis; Reophax ovicula; Reophax pilulifer; Reophax spiculifer; Rhabdammina cf. linearis; Rhabdammina spp.; Rhezarkina sp.; Rhizammina indivisa; Robertinoides sp.; Rotaliammina ochracea; Saccammina sphaerica; Saccorhiza ramosa; Subreophax aduncus; Textularia wiesneri; Thurammina papillata; Trifarina angulosa; Triloculina frigida; Triloculina tricarinata; Tritaxis squamata; Trochammina globulosa; Trochammina nana; Trochammina nitida; Trochammina sp.; Trochammina spp.
    Type: Dataset
    Format: text/tab-separated-values, 3663 data points
    Location Call Number Limitation Availability
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  • 10
    Publication Date: 2023-07-24
    Keywords: ANT-V/4; AWI_Paleo; Calcium carbonate; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; DEPTH, sediment/rock; Eastern Weddell Sea, Southern Ocean; Element analyser CHN, LECO; Epistominella exigua, δ13C; Epistominella exigua, δ18O; Gravity corer (Kiel type); Mass spectrometer Finnigan MAT 251; Neogloboquadrina pachyderma sinistral, δ13C; Neogloboquadrina pachyderma sinistral, δ18O; Oridorsalis umbonatus, δ13C; Oridorsalis umbonatus, δ18O; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS10; PS10/816; PS1506-1; SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents
    Type: Dataset
    Format: text/tab-separated-values, 2245 data points
    Location Call Number Limitation Availability
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