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  • 1
    Buch
    Buch
    Kiel : Sonderforschungsbereich 313, Univ. Kiel
    Materialart: Buch
    Seiten: 44 S , Ill., graph. Darst., Kt
    Sprache: Englisch
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Materialart: Buch
    Seiten: Getr. Zählung , graph. Darst., Kt.
    Ausgabe: Kiel
    Sprache: Deutsch
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    ISSN: 1365-3091
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie
    Notizen: Comparison of ultrastructures in Pliocene periplatform carbonates from the Bahamas with Silurian limestones from Gotland (Sweden) reveals that despite the differences in primary sediment composition and age, they reflect a similar mechanism of lithification. In both sequences calcite microspar was formed as a primary cement at an early stage of marine burial diagenesis. Neither significant compression nor meteoric influence are necessary for the formation of calcite microspar. A model is proposed for the process of microsparitic cementation of fine-grained aragonite needle muds comprising four stages: (1) unconsolidated, aragonite-dominated carbonate mud; (2) precipitation of microspar that engulfs aragonite needles; (3) dissolution of aragonite, resulting in pitted surfaces of the microspar crystals; and (4) slight recrystallization. Our results contradict the widespread opinion that microspar necessarily is a product of secondary recrystallization of a previously lithified micrite.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    facet.materialart.
    Unbekannt
    PANGAEA
    In:  Geologisch-Paläontologisches Institut, Christian-Albrechts-Universität, Kiel
    Publikationsdatum: 2023-11-08
    Schlagwort(e): 41-366A; Comment; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Film number; Glomar Challenger; Image number/name; Leg41; Negative number; North Atlantic/CONT RISE; Sample code/label; Sample ID; Scanning electron microscope (SEM); Uniform resource locator/link to image
    Materialart: Dataset
    Format: text/tab-separated-values, 4645 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    facet.materialart.
    Unbekannt
    PANGAEA
    In:  Geologisch-Paläontologisches Institut, Christian-Albrechts-Universität, Kiel
    Publikationsdatum: 2023-11-08
    Schlagwort(e): 41-366A; Comment; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Film number; Glomar Challenger; Image number/name; Leg41; Negative number; North Atlantic/CONT RISE; Sample code/label; Scanning electron microscope (SEM); Uniform resource locator/link to image
    Materialart: Dataset
    Format: text/tab-separated-values, 7113 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    facet.materialart.
    Unbekannt
    PANGAEA
    In:  Supplement to: Hass, H Christian; Andruleit, Harald; Baumann, Astrid; Baumann, Karl-Heinz; Kohly, Alexander; Jensen, Stefan; Matthiessen, Jens; Samtleben, Christian; Schäfer, Priska; Schröder-Ritzrau, Andrea; Thiede, Jörn (2001): The potential of synoptic plankton analyses for paleoclimatic investigations: five plankton groups from the Holocene nordic seas. In: Schäfer, W; Ritzrau, M; Schlüter & J. Thiede (eds.) The Northern North Atlantic: A Changing Environment, Springer Verlag, Berlin, 500 pp, 291-318, https://doi.org/10.1007/978-3-642-56876-3_18
    Publikationsdatum: 2024-02-02
    Beschreibung: Five plankton groups, including diatoms, radiolarians, coccolithophores, foraminifers, and dinoflagellate cysts, were synoptically analyzed in six sediment cores and two sediment traps from the Norwegian-Greenland Sea and the North Atlantic in order to provide more detailed insights into the paleoclimatic and paleoceanographic evolution and the development of plankton assemblages of the northern North Atlantic during the last 15,000 years. Based on Q-mode factor analyses, cold, warm, transitional, and relict assemblages were calculated for each of the plankton groups. Data from the different plankton groups complement one another, although they are not always consistent. However, the multiple plankton-group data set is able to bridge intervals in which single groups lack preservation or the ability to react to changes. Synoptically interpreted, the results provide a detailed picture of the response of plankton assemblages to environmental changes during the time period investigated, which includes the B0lling/Aller0d interstadial, the Younger Dryas cold spell, Termination IB, and, in all likelihood, also the "8,200 Event", and the Hypsithermal (approximately 8-4 14C ky BP).
    Schlagwort(e): Age, 14C AMS; Age, dated; Age, dated standard deviation; Arctic Ocean; calibrated; DEPTH, sediment/rock; Event label; Giant box corer; GIK23071-3; GIK23259-2; GIK23400-3; GIK23411-5; GIK23414-6; GIK23424-3; GKG; Global Environmental Change: The Northern North Atlantic; KAL; Kasten corer; KOL; M17/1; M17/2; M2/2; M21/4; M23414; M7/2; Meteor (1986); Norwegian-Greenland Sea; Norwegian Sea; Piston corer (Kiel type); Reference/source; Reservoir effect/correction; SFB313
    Materialart: Dataset
    Format: text/tab-separated-values, 135 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
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    Unbekannt
    Elsevier
    In:  Marine Micropaleontology, 16 (1-2). pp. 39-64.
    Publikationsdatum: 2020-07-09
    Beschreibung: The fine fraction of surface sediment samples in the Norwegian Sea shows an unexpectedly high amount of calcareous nannoplankton. Investigations, using time-series sediment traps in the Lofoten Basin (69°N, 1983/84), near Bear Island (75°N, 1984/85) and in the Fram Strait (78°N, 1984/85) provided information about the accumulation of this material in relation to the strong seasonality of biological production. Coccolith identification and counting, by means of a scanning electron microscope, indicated that the coccolith assemblages in the traps consist almost entirely of the two speciesEmiliania huxleyi andCoccolithus pelagicus. These species dominated the flux rate of the nannoplankton carbonate. A further eight species only made minor contributions to the flux. In the Lofoten Basin a distinct seasonality could be recognized in both standing crop and carbonate flux. Also the relationship between the two main species and the proportion of intact coccospheres showed an annual cycle. In the sample series of the two northerly traps the seasonality was less distinct. In general, the coccolith flux decreases towards the North. This was particularly evident for the smaller speciesE. huxleyi, while the number of massiveC. pelagicus coccoliths — and so the coccolith carbonate flux — diminished only slightly. Additional investigations on water samples from the Norwegian Sea revealed species compositions that differed greatly from those in the sediment traps. This suggests that selective processes change the relative species proportions during sedimentation.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    facet.materialart.
    Unbekannt
    In:  Berichte aus dem Sonderforschungsbereich 313, Sedimentation im Europäischen Nordmeer, 25 . UNSPECIFIED, 60 pp.
    Publikationsdatum: 2018-12-11
    Materialart: Report , NonPeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
    facet.materialart.
    Unbekannt
    Grzybowski Foundation
    In:  In: Contributions to the micropaleontology and paleoceanography of the northern North Atlantic (collected results from the GEOMAR Bungalow Working Group). , ed. by Hass, H. C. and Kaminski, M. A. Grzybowski Foundation, Krakow, pp. 227-243.
    Publikationsdatum: 2016-01-19
    Beschreibung: The present investigation was initiated to report on species compositions and dynamics in the Norwegian-Greenland Sea during low production phases in spring and early summer. Thus, the distribution patterns of living coccolithophores during June to July, 1990, February and May, 1991, and March to April, 1995 were investigated. In general, the seasonal development of the phytoplankton started after the yearly dark period and coccolithophores increased in abundance when the water column was more stratified and both temperatures and insolation increased. Cell densities reached a maximum of 207x10~c occospheres/l in the southeastern part of the studied area. However, these high cell densities probably resulted from ,,old" populations, drifted to the Norwegian-Greenland Sea from the North Atlantic. Some of the collected samples did not contain any coccolithophores. In total, 15 coccolithophore species were identified. The diversity was generally higher in the eastern part of the Norwegian-Greenland Sea and to the west the coccolithophore communities often were monospecific. Emiliania huxleyi is the dominant species, but Calciopappus caudatus and Algirosphaera robusta also considerably contribute to the communities. High cell densities of C. caudatus were interpreted as the result of a bloom or more probably close to bloom conditions during the general low productive period. In addition, many of the E. huxleyi coccolith from the surface waters of the southeastern Norwegian-Greenland Sea were heavily corroded. These specimens may have drifted within the Atlantic water for a longer time.
    Materialart: Book chapter , NonPeerReviewed
    Format: text
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