118 Works

Record of pollen, silt and greyscale stack from the Eifel Laminated Sediment Archive (ELSA), supplement to: Sirocko, Frank; Seelos, Klemens; Schaber, Katja; Rein, Bert; Dreher, Frank; Diehl, Markus; Lehne, Rouwen; Jäger, Knut; Krbetschek, Matthias R; Degering, Detlev (2005): A late eemian aridity pulse in central Europe during the last glacial inception. Nature, 436, 833-836

Frank Sirocko, Klemens Seelos, Katja Schaber, Bert Rein, Frank Dreher, Markus Diehl, Rouwen Lehne, Knut Jäger, Matthias R Krbetschek & Detlev Degering
Investigating the processes that led to the end of the last interglacial period is relevant for understanding how our ongoing interglacial will end, which has been a matter of much debate. A recent ice core from Greenland demonstrates climate cooling from 122,000 years ago driven by orbitally controlled insolation, with glacial inception at 118,000 years ago. Here we present an annually resolved, layer-counted record of varve thickness, quartz grain size and pollen assemblages from a...

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...

Sedimentological and paleomagnetic investigations on two gravity cores and ODP sites 113-690 and 693 off Kapp Norvegia, Antarctic continental margin, supplement to: Grobe, Hannes; Fütterer, Dieter K; Spieß, Volkhard (1990): Oligocene to Quaternary sedimentation processes on the Antarctic continental margin, ODP Leg 113, Site 693. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 121-131

Hannes Grobe, Dieter K Fütterer & Volkhard Spieß
Oligocene to Quaternary sediments were recovered from the Antarctic continental margin in the eastern Weddell Sea during ODP Leg 113 and Polarstern expedition ANT-VI. Clay mineral composition and grain size distribution patterns are useful for distinguishing sediments that have been transported by ocean currents from those that were ice-rafted. This, in turn, has assisted in providing insights about the changing late Paleogene to Neogene sedimentary environment as the cryosphere developed in Antarctica. During the middle...

Diatom abundance counted on water bottle samples from the EisenEx cruise to the Southern Ocean, supplement to: Assmy, Philipp; Henjes, Joachim; Klaas, Christine; Smetacek, Victor (2007): Mechanisms determining species dominance in a phytoplankton bloom induced by the iron fertilization experiment EisenEx in the Southern Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 54(3), 340-362

Philipp Assmy, Joachim Henjes, Christine Klaas & Victor Smetacek
The dynamics of phytoplankton species populations recorded during the 3-week, iron-fertilization experiment EisenEx carried out in spring in the Antarctic Polar Frontal Zone are presented and discussed as the difference between growth and mortality rates. Only two cosmopolitan diatom species, the centric Chaetoceros debilis and the pennate Pseudo-nitzschia lineola, increased population density exponentially throughout the experiment to 150-fold and 90-fold of initial values respectively. Because C. debilis initial abundance was tenfold lower than that of...

Distribution of benthic foraminifera with related sedimentological hydrographic parameter in the eastern Weddell Sea, Antarctica, supplement to: Mackensen, Andreas; Grobe, Hannes; Kuhn, Gerhard; Fütterer, Dieter K (1990): Benthic foraminiferal assemblages from the eastern Weddell Sea between 68 and 73°S: distribution, ecology and fossilization potential. Marine Micropaleontology, 16(3-4), 241-283

Andreas Mackensen, Hannes Grobe, Gerhard Kuhn & Dieter K Fütterer
Surface sediment samples taken with a vented box corer from the eastern Weddell Sea on four profiles perpendicular to the continental margin have been investigated for their benthic foraminiferal content. The live fauna was differentiated from empty tests comprising the foraminiferal death assemblage. Based on the dead assemblages, potential fossil assemblages were calculated to facilitate the analogy with late Neogene core material. Five distinct live assemblages inhabit the continental margin today. Six dead assemblages and...

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 -...

Pollen analysis of surface sediment off northwest Africa, supplement to: Hooghiemstra, Henry; Agwu, Chiori O C; Beug, Hans-Jürgen (1986): Pollen and spore distribution in recent marine sediments: a record of NW-African seasonal wind patterns and vegetation belts. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C40, 87-135

Henry Hooghiemstra, Chiori O C Agwu & Hans-Jürgen Beug
Over 100 samples of recent surface sediments from the bottomn of the Atlantic Ocean offshore NW Africa between 34° and 6° N have been analysed palynologically. The objective of this study was to reveal the relation between source areas, transport systems, and resulting distribution patterns of pollen and spores in marine sediments off NW Africa, in order to lay a sound foundation for the interpretation of pollen records of marine cores from this area. The...

Fragmentation and dissolution of benthic foraminifera in Kiel Bight, Baltic Sea, Germany, supplement to: Grobe, Hannes; Fütterer, Dieter K (1981): Zur Fragmentierung benthischer Foraminiferen in der Kieler Bucht (Westliche Ostsee). Meyniana, 33, 85-96

Hannes Grobe & Dieter K Fütterer
Early diagenetic ultrastructural alterations of benthic foraminifers of the genera Elphidium and Ophthalmina from the shallow water sediments of the Kiel Bight were investigated by scanning electron microscopy. Pure solution patterns were deduced from supplementary experiments.//Several carbonate destroying processes can be specified by ultrastructural patterns of the shell surfaces. Based on these patterns three zones are established, each showing different mechanisms of shell fragmentation: 1) zone of abrasion, 2) zone of disintegration, 3) zone of...

Documentation and sedimentology of core PS1021-1 from the Antarctic continental margin off Kap Norvegia, supplement to: Grobe, Hannes (1986): Sedimentation processes on the antarctic continental margin at Kapp Norvegia during the Late Pleistocene. Geologische Rundschau, 75/1, 97-104

Hannes Grobe
Sedimentological analyses concerning ice rafted debris, grain size distribution, biogenous components, and clay mineral composition of four sediment cores from the Antarctic continental margin off Kapp Norvegia reveal a cyclical pattern of three different sediment facies. These are classified into warm and cold types representing warm and cold climatic periods and a short transition period from cold to warm events.The sedimentological parameters reflect the variations within the cryosphere and the hydrosphere, which are directly influenced...

Paleomagnetic and stable isotope measurements and distribution of benthic foraminifera in sediment core PS1388-3 from the Antarctic continental margin in the eastern Weddell Sea, supplement to: Mackensen, Andreas; Grobe, Hannes; Hubberten, Hans-Wolfgang; Spieß, Volkhard; Fütterer, Dieter K (1989): Stable isotope stratigraphy from the Antarctic continental margin during the last one million years. Marine Geology, 87(2-4), 315-321

Andreas Mackensen, Hannes Grobe, Hans-Wolfgang Hubberten, Volkhard Spieß & Dieter K Fütterer
A stable isotope record from the eastern Weddell Sea from 69°S is presented. For the first time, a 250,000-yr record from the Southern Ocean can be correlated in detail to the global isotope stratigraphy. Together with magnetostratigraphic, sedimentological and micropalaeontological data, the stratigraphic control of this record can be extended back to 910,000 yrs B.P. A time scale is constructed by linear interpolation between confirmed stratigraphic data points.The benthic d18O record (Epistominella exigua) reflects global...

Sedimentological investigations of sediment profiles from the continental slope off South Orkney Islands, supplement to: Fütterer, Dieter K; Grobe, Hannes; Grünig, Sigrun (1988): Quaternary sediment patterns in the Weddell Sea: relations and environmental conditions. Paleoceanography, 3(5), 551-561

Dieter K Fütterer, Hannes Grobe, Sigrun Grünig, Andrea Abelmann & Ulrich Bleil
Sediment patterns such as texture, composition, and facies from three selected areas of the Antarctic continental margin of the Weddell Sea are discussed in relation to environmental variations of the Quaternary hydrosphere and kryosphere. Advance and retreat of ice shelves as well as oscillations in sea ice coverage are reflected by particular sediment facies. The distribution of ice-rafted detritus tracks the Antarctic Coastal Current, and the Weddell Sea Bottom water contour current can be recognized...

Stable oxygen isotope composition of the sea water in the Mediterranean Sea, supplement to: Stahl, Wolfgang; Rinow, U (1973): Sauerstoffisotopenanalysen an Mittelmeerwässern. Ein Beitrag zur Problematik von Paläotemperaturbestimmungen. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C14, 55-59

Wolfgang Stahl & U Rinow
During the cruises No 17 and 22 of the German research vessel „Meteor“, 45 water samples were taken at 4 stations in the central part of the Mediterranean Sea. Mass spectrometrical analyses showed that systematic, but time variable changes of the oxygen isotope ratios occur. Deep water samples (T> 500 m) have a ± constant isotopic composition of d18O = +1.79‰ (SMOW) and a Chlorinity of 21.399‰. These data are discussed with respect to paleotemperature...

Density and stable oxygen isotope profiles of four snow pits from Berkner Island, Filchner-Ronne Ice Shelf, Antarctica, supplement to: Wagenbach, Dietmar; Graf, Wolfgang; Minikin, Andreas; Trefzer, Ulrich; Kipfstuhl, Sepp; Oerter, Hans; Blindow, Norbert (1994): Reconnaissance of chemical and isotopic firn properties on top of Berkner Island, Antarctica. Annals of Glaciology, 20, 307-312

Dietmar Wagenbach, Wolfgang Graf, Andreas Minikin, Ulrich Trefzer, Sepp Kipfstuhl, Hans Oerter & Norbert Blindow
The ice cap on Berkner Island is grounded on bedrock within the Filchner-Ronne Ice Shelf and is, therefore, expected to be a well-suited place to retrieve long-term ice-core records reflecting the environmental situation of the Weddell Sea region. Shallow firn cores were drilled to 11 m at the two main summits of Berkner Island and analysed in high depth resolution for electrical d.c. conductivity (ECM), stable isotopes, chloride, sulphate, nitrate and methane-sulphonate (MSA). From the...

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...

Abundance of ostracoda in sediment cores CRP-1 and CRP-2, supplement to: Dingle, R V (2000): Ostracoda from CRP-1 and CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 479-492

R V Dingle
Sparse, poorly preserved late Oligocene (3 species) and early Miocene (4 species) ostracod faunas have been recovered from CRP-2A, while relatively more abundant Quaternary faunas occur in CRP-1 (24 species). All taxa are marine. No definitive age assignments can be made on the two older faunas, which are not considered to be in situ, although the taxa identified are not at variance with sediment ages determined on other grounds. The Oligocene ostracods (Lithostratigraphical Unit, LSU...

Physical and chemical analysis of firn cores from Ronne Ice Shelf, Antarctica, supplement to: Graf, Wolfgang; Reinwarth, Oskar; Oerter, Hans; Mayer, Christoph; Lambrecht, Astrid (1999): Surface accumulation on Foundation Ice Stream, Antarctica. Annals of Glaciology, 29, 23-28

Wolfgang Graf, Oskar Reinwarth, Hans Oerter, Christoph Mayer & Astrid Lambrecht
This data on the distribution of the accumulation rate and 18O content of near-surface layers in the eastern part of the Ronne Ice Shelf, Antarctica, were derived from an analysis of 16 firn cores. The firn cores were drilled along the traverse route of the Filchner-V-Campaign in 1995. The traverse followed an ice flowline of the Foundation Ice Stream and reached the margin of the inland ice, an area which has not yet been investigated....

Chemical analysis of various geological samples from Northern Victoria Land, Antarctica, supplement to: Fioretti, A M; Lanza, R (2000): Preliminary palaeomagnetic results from the Devono-Carboniferous Admiralty intrusives (Northern Victoria Land, Antarctica). Terra Antartica, 7(5), 657-664

A M Fioretti & R Lanza
This paper reports the results of a preliminary palaeomagnetic investigation of the Admiralty Intrusives complex of northern Victoria Land, Antarctica. The samples were collected at Mt. Supernal and Inferno Peak, two pinions mainly formed of granodiorite and minor tonalite and emplaced at ab. 350 Ma at a high crustal level, as shown by amphibole geobarometric data and occurrence of miarolitic cavities. Microprobe and isothermal remanence analyses showed that magnetite. characterized by low coercivity and Curic...

Age models and sea-surface paleotemperature reconstruction of sediment cores from the eastern equatorial Atlantic, supplement to: Pflaumann, Uwe (1986): Sea-surface temperatures during the last 750,000 years in the eastern equatorial Atlantic: Planktonic foraminiferal record of Meteor - cores 13519, 13521, and 16415. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C40, 137-161

Uwe Pflaumann
Based on the faunal record of planktonic foraminifers in three long gravity sediment cores from the eastern equatorial Atlantic, the sea-surface temperature history ove the last 750,000 years was studied at a resolution of 3,000 to 10,000 years. Detailed oxygen-isotope and paleomagnetic stratigraphy helped to identify the following major faunal events: Globorotaloides hexagonus and Globorotalia tumida flexuosa became extinct in the eastern tropical Atlantic at the isotope stage 4/5 boundary, now dated at 68,000 years...

Ostracoda fauna of surface sediments from the Persian Gulf, supplement to: Ho Paik, K (1977): Regionale Untersuchungen zur Verteilung der Ostracoden im Persischen Golf und im Golf von Oman. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C28, 37-76

K Ho Paik
During the "Meteor“-Expedition to the Persian Gulf in March-May 1965, approximately 300 samples were collected. Most of them have been already studied by various authors in sedimentological as well as micropaleontological respects. 49 samples were selected for ostracode studies. These samples are arranged to form a long-axis section ("Laengsprofil“), and 4 shorter cross-profiles, perpendicular to the long-axis profile in the Persian Gulf and Gulf of Oman.52 species of ostracodes in this area were specifically determined;...

Age models of sediment cores from the North-West African continental margin, supplement to: Lutze, Gerhard F; Pflaumann, Uwe; Weinholz, Peter (1986): Jungquartäre Fluktuationen der benthischen Foraminiferenfaunen in Tiefsee-Sedimenten vor NW-Afrika - Eine Reaktion auf Produktivitätsänderungen im Oberflächenwasser. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C40, 163-180

Gerhard F Lutze, Uwe Pflaumann & Peter Weinholz
A statistical analysis ol 15 deep sea cores in the eastern North Atlantic off NW Africa revealed the typical fluctuation pattern of distinct species proups as has been described from various parts of the world ocean.Only the "WBF-group" appears to be correlated with global climatic changes, i.e. warmer periods as the Eemian and the Atlanticum. A partly antagonistic "High Productivity group" (HPR-group) is in general not linked with global changes but times of increased fertility...

Physical and acoustic sediment properties of sediment cores from the eastern equatorial Atlantic, supplement to: Mienert, Jürgen (1986): Akustostratigraphie im äquatorialen Ostatlantik: Zur Entwicklung der Tiefenwasserzirkulation der letzten 3,5 Millionen Jahre. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C40, 19-86

Jürgen Mienert
To reconstruct the deep-water circulation for the last 3.5 Ma from deep-sea sediments of the eastern equatorial Atlantic, sea floor morphology, sub-bottom reflectors and the echo character have been mapped on the basis of 3.5 kHz records and sediment cores. Physical properties of sediments and synthetic seismograms derived from them enable us to decipher reflector sequences in environments of pelagic, current-resuspended and turbidity sedimentation. The individual reflectors originate from carbonate dissolution, hiatus, coarse sand layers...

Isoleucine epimerization in Quarternary planktic foraminifera of sediment core GIK12519-2, Sierra Leone Rise, supplement to: Müller, Peter J (1984): Isoleucine epimerization in Quaternary planktonic foraminifera: Effects of diagenetic hydrolysis and leaching, and Atlantic-Pacific intercore correlations. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C38, 25-48

Peter J Müller
Panktonic foraminiferal tests of the spinose species Orbulina universa, of the non-spinose Globorotalia tumida-menardii complex, and of a mixed species assemblage (grain size fraction 200-400 µm) were isolated from Sierra Leone Rise core GIK13519-2 and analyzed for free, total, and bound (by difference) amino acids to study the isoleucine epimerization mechanism in fossil foraminiferal tests and to define empirical calibration curves for dating deep-sea sediments over the past 900,000 years.Total isoleucine epimerization curves typically separate...

Geochemical analysis of bulk sediment and interstitial water of sediment cores from the North-West African continental margin, supplement to: Seralathan, P; Hartmann, Martin (1986): Molybdenum and vanadium in sediment cores from the NW-African continental margin and their relations to climatic and environmental conditions. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C40, 1-17

P Seralathan & Martin Hartmann
Molybdenum and vanadium were analysed in 9 scediment cores recovered from the continental slope and rise off NW Africa. Additionall chemical and sedimentological parameters as well as isotope stage boundaries were available for the same core profiles from other investigations. Molybdenum, ranging between <1 and 10 ppm, occurs in two associateions, either with organic carbon and sulphides in sediments with reducing conditions or with Mn oxides in oxidized near-surface core sections. Highest values (between 4...

Stable isotope record of planktic foraminifera sampled by plankton haul and in surface sediments off North-West Africa, supplement to: Ganssen, Gerald M (1983): Dokumentation von küstennahmen Auftrieb anhand stabiler Isotope in rezenten Foraminiferen vor Nordwest-Afrika. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C37, 1-46

Gerald M Ganssen
Foraminifera shells from modern sediments document the hydrography of the coastal upwelling region off Northwest-Africa (12-35° N) through the stable isotopic composition of their shells.Oxygen isotopes in planktonic foraminifers reflect sea surface temperatures (SST) during the main growing season of the differnt species: Globigerinoides ruber (pink and white) and G. sacculifer delineate the temperatures of the summer, Globorotalia inflata and Pulleniatina obliquiloculata those of the winter. Oxygen isotopes on Globigerina bulloides document temperature ranges of...

Composition of the sand fraction of sediment cores from the West-African continental margin, supplement to: Diester-Haass, Lieselotte (1983): Late Quaternary sedimentation processes on the West-African continental margin and climatic history of West-Africa (12-18° N). Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C37, 47-84

Lieselotte Diester-Haass
Seven cores from the West African continental margin in 12-18° N have been investigated by means of a coarse fraction analysis.Four of the seven cores contain allochthonous material: turbidites and debris flow deposits. The source of the allochthonous material is in about 300-600 m water depth. The age of the slide induced debris flow deposits is at the end of oxygen isotope stage 2. One debris flow deposit is covered by a turbidite (core GIK13211-1).The...

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