118 Works

Detailed analysis of the organic carbon content in sediment cores M0002 and M0004, supplement to: Stein, Ruediger (2007): Upper Cretaceous/Lower Tertiary black shales near the North Pole: Organic-carbon origin and source-rock potential. Marine and Petroleum Geology, 24(2), 67-73

Ruediger Stein
During IODP Expedition 302 (Arctic Coring Expedition-ACEX), the first scientific drilling campaign in the permantly ice-covered central Arctic Ocean, a 430 m thick sequence of upper Cretaceaous to Quaternary sediments has been drilled. The lower half of this sequence is composed of organic-carbon-rich (black shale-type) sediments with total organic carbon contents of about 1–14%. Significant amounts of the organic matter preserved in these sediments is of algae-type origin and accumulated under anoxic/euxinic conditions. Here, for...

Bulk sedimentology from Sites M0002 and M0004 of the ACEX (Exp302) expedition to the Arctic Ocean, supplement to: Stein, Ruediger; Boucsein, Bettina; Meyer, Hanno (2006): Anoxia and high primary production in the Paleogene central Arctic Ocean: first detailed records from Lomonosov Ridge. Geophysical Research Letters, 33, L18606

Ruediger Stein, Bettina Boucsein & Hanno Meyer
Except for a few discontinuous fragments of the Late Cretaceous/Early Cenozoic climate history and depositional environment, the paleoenvironmental evolution of the pre-Neogene central Arctic Ocean was virtually unknown prior to the IODP Expedition 302 (Arctic Ocean Coring Expedition – ACEX) drilling campaign on Lomonosov Ridge in 2004. Here we present detailed organic carbon (OC) records from the entire ca. 200 m thick Paleogene OC-rich section of the ACEX drill sites. These records indicate euxinic „Black...

Stable isotope analysis and temperature reconstruction data from DSDP Hole 94-609B and ODP Hole 162-984B, supplement to: Bartoli, Gretta; Sarnthein, Michael; Weinelt, Mara; Erlenkeuser, Helmut; Garbe-Schönberg, Carl-Dieter; Lea, David W (2005): Final closure of Panama and the onset of northern hemisphere glaciation. Earth and Planetary Science Letters, 237, 33-44

Gretta Bartoli, Michael Sarnthein, Mara Weinelt, Helmut Erlenkeuser, Carl-Dieter Garbe-Schönberg & David W Lea
The Greenland ice sheet is accepted as a key factor controlling the Quaternary glacial scenario. However, the origin and mechanisms of major Arctic glaciation starting at 3.15 Ma and culminating at 2.74 Ma are still controversial. For this phase of intense cooling Ravelo et al. proposed a complex gradual forcing mechanism. In contrast, our new submillennial-scale paleoceanographic records from the Pliocene North Atlantic suggest a far more precise timing and forcing for the initiation of...

Stable isotope analysis of benthic foraminifera and sedimentology on ODP Site 162-984, supplement to: Bartoli, Gretta; Sarnthein, Michael; Weinelt, Mara (2006): Late Pliocene millennial-scale climate variability in the northern North Atlantic prior to and after the onset of Northern Hemisphere glaciation. Paleoceanography, 21(4), PA4205

Gretta Bartoli, Michael Sarnthein & Mara Weinelt
Sediments recovered at ODP Site 984 on the Reykjanes Ridge provided multicentennial-scale records (SST, planktic and benthic delta18O, IRD and magnetic susceptibility) of Late Pliocene climate change over the onset of Northern Hemisphere glaciation (NHG), 2.95-2.82 Ma. Short-term climate variations prior and after the onset of continent-wide glaciation were compared to test the hypothesis, whether Dansgaard-Oeschger (DO) cycles may have been triggered by continental ice breakouts. By means of spectral analyses for two selected interglacial...

Clay minerals in the Norwegian Sea and Fram Strait, investigation from sediment traps and cores, supplement to: Berner, Heinrich (1991): Mechanismen der Sedimentbildung in der Framstrasse, im Arktischen Ozean und in der Norwegischen See. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 20, 167 pp

Heinrich Berner
The grain size distribution and clay mineral composition of lithogenic particles of ice-rafted material, sinking matter, surface sediments, as well as from deep-sea cores are analysed. The samples were collected in the Fram Strait, the Arctic Ocean, and the Norwegian Sea during several expeditions with the research vessels "Polarstern", "Meteor" and "Poseidon", and Norwegian rearch vessels. Sinking matter was caught with sediment traps, fitted with timer-controlled sample changers, which had been deployde in the sea...

Sedimentology on cores from the Greenland continental margin off Scoresby Sund, supplement to: Stein, Ruediger; Grobe, Hannes; Hubberten, Hans-Wolfgang; Marienfeld, Peter; Nam, Seung-Il (1993): Latest Pleistocene to Holocene changes in glaciomarine sedimentation in Scoresby Sund and along the adjacent East Greenland Continental Maring: preliminary results. Geo-Marine Letters, 13, 9-16

Ruediger Stein, Hannes Grobe, Hans-Wolfgang Hubberten, Peter Marienfeld & Seung-Il Nam
High-resolution stable oxygen and carbon isotope analyses and detailed sedimentological and geochemical investigations were performed in order to (i) reconstruct the paleoclimate and paleoceanography of the Greenland Sea associated with late Quaternary glacial-interglacial cycles, and (ii) to link the terrestrial and deep-sea climatic records. The reconstruction of the paleoenvironmental history of the East Greenland margin and the correlation between the terrestrial and deep sea records are major objectives of the ESF-PONAM-Programme (European Science Foundation -...

Time series of air chemistry measurements at Georg-von-Neumayer station, Dronning Maud Land, Antarctica in the years 1982 to 1991

Dietmar Wagenbach & Rolf Weller
The first Air Chemistry Observatory at the German Antarctic station Georg von Neumayer (GvN) was operated for 10 years from 1982 to 1991. The focus of the established observational programme was on characterizing the physical properties and chemical composition of the aerosol, as well as on monitoring the changing trace gas composition of the background atmosphere, especially concerning greenhouse gases. The observatory was designed by the Institut für Umweltphysik, University of Heidelberg (UHEIIUP).The experiments were...

426 ozonesonde profiles from Georg-Forster-Station, supplement to: König-Langlo, Gert; Gernandt, Hartwig (2009): Compilation of ozonesonde profiles from the Antarctic Georg-Forster-Station from 1985 to 1992. Earth System Science Data, 1(1), 1-5

Gert König-Langlo & Hartwig Gernandt
On 22 May 1985 the first balloon-borne ozonesonde was successfully launched by the staff of Georg-Forster-Station (70°46' S, 11°41' E). The following weekly ozone soundings mark the beginning of the continuous investigation of Germany to study the vertical ozone distribution in the southern hemisphere. In 1985 these ozone soundings have been the only record showing the change of vertical ozone distribution in the southern polar stratosphere in September and October. The regular ozone soundings from...

Standard meteorological measurements on board of POLARSTERN during expedition ANT-IV (PS08, 4 cruises, south summer 1985/86) in the Atlantic and Weddell Sea, Antarctica

Gert König-Langlo
During the fourth Antarctic voyage ANT-IV of the research icebreaker POLARSTERN standard meteorological measurements have been performed. The measurements include 3-hourly synoptic observations as well as daily upper air soundings. The measurements started on September 6 1985 at Bremerhaven and were terminated at April 28 1986 in Punta Arenas.The 3-hourly synoptic observations are performed following the instructions of the FM 13 ships code defined by the World Meteorological Organization (WMO). The datasets include automatic measurements...

Mapping of the Eltanin impact area in the South-East Pacific

Merijn J Jacops & Hans Werner Schenke
Two Polarstern expeditions were conducted in 1995 (ANT-XII/4) and 2001 (ANT-XVIII/5a) to the Bellingshausen Sea and Amundsen Sea and the suspected Eltanin meteorite impact in the SE-Pacific. A survey of the sediment distribution and its acoustic structure along the cruise track was performed. The seafloor topography was sampled using the multibeam sonar system Hydrosweep DS2 which operates on a frequency of 15.5 kHz. The resulting AWI Bathymetric Chart of the Eltanin Meteorite Impact Area is...

Physical and chemical investigations on ice cores from the Filchner-Ronne Ice Shelf, supplement to: Graf, Wolfgang; Moser, Heribert; Reinwarth, Oskar; Kipfstuhl, Sepp; Oerter, Hans; Minikin, Andreas; Wagenbach, Dietmar (1994): Snow-accumulation rates and isotopic content (2H, 3H) of near-surface firn from the Filchner-Ronne Ice Shelf, Antarctica. Annals of Glaciology, 20, 121-128

Hans Oerter & Wolfgang Graf
The accumulation and distribution of the 2H content of near-surface layers in the eastern part of the Ronne Ice Shelf were determined from 16 firn cores drilled to about 10 m depth during the Filchner IIIa and IV campaigns in 1990 and 1992, respectively. The cores were dated stratigraphically by seasonal d2H variations in the firn. In addition, 3H and high-resolution chemical profiles were used to assist in dating. Both the accumulation rate and the...

Geochemistry on smectites in sediment cores CRP-1 and CRP-2 from the Ross Sea, Antarctica, supplement to: Setti, Massimo; Marinoni, L; Lopez-Galindo, A; Delgado-Huertas, Antonio (2000): Compositional and morphological features of the smectites of the sediments of CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 581-587

Massimo Setti, L Marinoni, A Lopez-Galindo & Antonio Delgado-Huertas
TEM (transmission electron microscopy) observations and microanalyses on smectite microparticles in the sediments of the CRP-2A core were carried out to determine their origin (authigenic or detrital) and the source rocks. Smectites are dioctahedral and are Fe-rich members of the nontronite-beidellite series. They generally display both flaky and hairy shapes, but no large compositional difference between the two forms was observed. Flaky smectites are detrital while hairy smectites probably formed in situ through the reorganisation...

Sedimentology, magnetics and chemistry on palaeolake core D100 from the Gobi Desert, supplement to: Wünnemann, Bernd; Hartmann, Kai; Altmann, Norbert; Hambach, Ulrich; Pachur, Hans-Joachim (2006): Interglacial and glacial fingerprints from the Gobi Desert, NW China. In: Sirocko, F, Claussen, M, Litt, T & Sanchez-Goñi, M F(eds.): The climate of past interglacials; Developments in Quaternary Science, Elsevier, Amsterdam

Bernd Wünnemann, Kai Hartmann, Norbert Altmann, Ulrich Hambach & Hans-Joachim Pachur
The Gaxun Nur Basin in arid China is tectonically influenced by the left-lateral displacements along the Gobi-Altay and Qilian Shan shear zones, resulting in a large pull-apart basin with strong subsidence in the interior. The up to 300 m thick basin fills consist of fluvio-lacustrine fine-grained deposits mainly transported by river discharges from the Tibetan Plateau. They led to a large depositional area of more than 28,000 qkm in size with presently dry terminal lakes...

Benthic foraminifera of surface samples and sediment cores off Senegal and Gambia, West Africa, supplement to: Haake, F W (1980): Benthische Foraminiferen in Oberflächen-Sedimenten und Kernen des Ostatlantiks vor Senegal/Gambia (Westafrika). Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C32, 1-29

F W Haake
Water depth zonation of fifty nine benthonic foraminiferal species in marine sediment surfaces has been described. Some species are combined to groups which mark particular depth zones: an upper and lower shelf-fauna, an upper and lower slope fauna, and a shelf-slope fauna.Dependence on latitude could be ascertained for Textularia panamensis, and submergence effects for Hyalinea balthica.

Sedimentology and geochemistry of the sand fraction in surface sediments off West Africa, supplement to: Diester-Haass, Lieselotte; Müller, Peter J (1979): Processes influencing sand fraction composition and organic matter content in surface sediments off W Africa (12-19°N). Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C31, 21-48

Lieselotte Diester-Haass & Peter J Müller
Surface sediments from 5 profiles between 30 and 3000 m water depth off W Africa (12-19° N) have been studied for their sand fraction composition and their total calcium carbonate and organic matter contents to evaluate the effect of climatic and hydrographic factors on actual sedimentation. On the shelf and upper slope (< 500 m), currents prevent the deposition of significant amounts of fine-grained material. The sediments forming here are characterized by high sand contents...

Description of recent sediments of the East African continental margin, supplement to: Reineck, Hans-Erich (1973): Schichtung und Wühlgefüge in Grundproben vor der ostafrikanischen Küste. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C16, 67-81

Hans-Erich Reineck
Recent sediments off East Africa coast show 5 fades, parallel the coast: biogene carbonate sand, olivgrey mud, foraminiferal sand, globigerine ooze, and deep sea clay. These sediments decrease progressively in grain size, carbonate content and shell debris away from the coast. They differ in the primary and biogenetic structures, degree of bioturbation, lebensspuren and content of fecal pellets.

Geochemistry of recent sediments of the East African continental margin, Arabian Sea, supplement to: Marchig, Vesna (1974): Zur Geochemie rezenter Sedimente des Indischen Ozeans II. Arabisches Meer, afrikanischer Kontinentalrand und Vergleich mit dem indisch-pakistanischen Kontinentalrand. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C18, 1-34

Vesna Marchig
Chemical analyses have been carried out on 40 samples from the sediment surface and 210 samples from cores that were taken from the edge of the African continental block at the Arabian Sea (coasts of Somalia and Kenya, from Cape Guardafui to Mombasa) on the occasion of the Indian Ocean Expedition of the German research vessel "Meteor"during the years 1964/65.The carbonate content shows its maximum on the northern part of the continental shelf of Africa,...

Composition of bioclastic sands, carbonates and pyroclastic rocks of the Great Meteor and Josephine Seamounts, eastern North Atlantic, supplement to: von Rad, Ulrich (1974): Great Meteor and Josephine Seamounts (eastern North Atlantic): Composition and origin of bioclastic sands, carbonate and pyroclastic rocks. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C19, 1-61

Ulrich von Rad
1. Great Meteor Seamount (GMS) is a very large (24,000 km**3) guyot with a flat summit plateau at 330-275 m; it has a volcanic core, capped by 150-600 m of post-Middle-Miocene carbonate and pyroclastic rocks, and is covered by bioclastic sands. The much smaller Josephine Seamount (JS, summit 170- 500 m w. d.) consists mainly of basalt which is only locally covered by limestones and bioclastic sands.2. The bioclastic sands are almost free of terrigenous...

Geochemistry of recent sediments from the Indian Ocean, supplement to: Marchig, Vesna (1972): Zur Geochemie rezenter Sedimente des Indischen Ozeans. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C11, 1-104

Vesna Marchig
During the International Indian Ocean Expedition (1964/65) sediment cores were taken on six profiles off the western coast of the Indian Subcontinent. These profiles run approximately perpendicular to the coast, from the deep-sea over the continental slope to the continental shelf. Additional samples and cores were taken in a dense pattern in front of the delta of the Indus River. This pattern of sampling covered not only marine sediments, but also river and beach sediments...

Age models, accumulation rates, and grain size distributions of sediment cores from the northern subtropical Atlantic, supplement to: Koopmann, B (1981): Sedimentation von Saharastaub im subtropischen Nordatlantik während der letzten 25.000 Jahre. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C35, 23-59

B Koopmann
The terrigenous sediment proportion of the deep sea sediments from off Northwest Africa has been studied in order to distinguish between the aeolian and the fluvial sediment supply. The present and fossil Saharan dust trajectories were recognized from the distribution patterns of the aeolian sediment. The following timeslices have been investigated: Present, 6,000, 12,000 and 18,000 y. B. P. Furthermore, the quantity of dust deposited off the Saharan coast has been estimated. For this purpose,...

Documentation of sediment cores from the Great Meteor Seamount, North Atlantic, supplement to: von Stackelberg, Ulrich; von Rad, Ulrich; Zobel, B (1976): Asymmetric distribution of displaced material in calareous oozes around Great Meteor Seamount (North Atlantic). Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C25, 1-46

Ulrich von Stackelberg, Ulrich von Rad & B Zobel
Sedimentological and biostratigraphic investigations of 15 cores (total length: 88 m) from the vicinity of Great Meteor seamount (about 30° N, 28° W) showed that the calcareous ooze are asymmetrically distributed around the seamount and vertically differentiated into two intervals. East and west of the seampunt, the upper "A"-interval is characterized by yellowish-brown sediment colors and bioturbation; ash layers and diatoms are restricted to the eastern cores. On both seamount flanks, the sediment of the...

Geochemical analysis of sediments and interstitial water in sediment cores from the North-West African continental margin and from the Central Pacific, supplement to: Müller, Peter J (1975): Diagenese stickstoffhaltiger organischer Subtanzen in oxischen and anoxischen marinen Sedimenten. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C22, 1-60

Peter J Müller
A. Continental slope sediments off Spanish-Sahara and Senegal contain up to 4% organic carbon and up to 0.4% total nitrogen. The highest concentrations were found in sediments from water depths between 1000 and 2000 m. The regional and vertical distribution of organic matter differs significantly. Off Spanish-Sahara the organic matter content of sediment deposited during glacial times (Wuerm, Late Riss) is high whereas sediments deposited during interglacial times (Recent, Eem) are low in organic matter....

Sand geochemistry on sediment core CRP-3 from the Ross Sea, Antarctica, supplement to: Sprovieri, Mario; Bellanca, Adriana; Neri, Rodolfo (2001): Bulk geochemistry of the sand fraction from CRP-3 (Victoria Land Basin, Antarctica): Evidence of provenance and Milankovitch climaric fluctuations. Terra Antartica, 8(4), 551-560

Mario Sprovieri, Adriana Bellanca & Rodolfo Neri
A total of 167 samples distubuted throughout the CRP-3 drillhole from 5.77 to 787.68 mbsf and representing fine to coarse sandstones have been analysed by X-ray fluorescence spectrometry (XRF) Bulk sample geochemistry (major and trace elements) indicates a dominant provenance of detritus from the Ferrar Supergroup in the uppermost 200 mbsf of the core. A markedly increased contribution from the Beacon sandstones is recognized below 200 mbsf and down to 600 mbsf. In the lower...

Stable isotope ratios measured on molluscan from the CRP sediment cores in the Ross Sea, Antarctica, supplement to: Lavelle, Mark; Fielding, Christopher R; Hall, Michael A (2001): Molluscan stable isotope temperature estimates of the southwestern Ross Sea during the early Oligocene and early Miocene, CRP-2/2A and CRP-3, Victoria Land Basin, Antarctica. Terra Antartica, 8(4), 439-444

Mark Lavelle, Christopher R Fielding & Michael A Hall
Stable isotope analyses of marine bivalve growth increment samples have been used to estimate early Oligocene (29.4 - 31.2) Ma and early Miocene (24.0 Ma) seafloor palaeotemperature from the southwestern continental margin of the Ross Sea. Measured d18O values average +2.5 ‰ in the early Miocene and range between +1.26 to +3.24 ‰ in the early Oligocene. The results show that palaeoceanographic conditions in McMurdo Sound during the mid-Cenozoic were significantly different from those of...

Facies investigations on sediment core CRP-3 from the Ross Sea, Antarctica, supplement to: Fielding, Christopher R; Naish, Tim R; Woolfe, Ken (2001): Facies architecture of the CRP-3 drillhole, Victoria Land Basin, Antarctica. Terra Antartica, 8(3), 217-224

Christopher R Fielding, Tim R Naish & Ken Woolfe
The Cenozoic Victoria Land Basin (VLB) stratigraphic section penetrated by CRP-3 is mostly of Early Oligocene age. It contains an array of lithofacies comprising fine-grained mudrocks, interlaminated and interbedded mudrocks/sandstones, mud-rich and mud-poor sandstones, conglomerates and diamctites that are together interpreted as the products of shallow marine to possibly non-marine environments of deposition, affected by the periodic advance and retreat of tidewater glaciers. This lithofacies assemblage can be readily rationalised using the facies scheme designed...

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