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  • 1
    Electronic Resource
    Electronic Resource
    Low marine sulphate and protracted oxygenation of the Proterozoic biosphere (2004)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 431 (2004), S. 834-838 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Progressive oxygenation of the Earth's early biosphere is thought to have resulted in increased sulphide oxidation during continental weathering, leading to a corresponding increase in marine sulphate concentration. Accurate reconstruction of marine sulphate reservoir size is therefore ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature02974
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Book reviews (2000)
    Oxford UK : Blackwell Science Ltd
    Sedimentology 47 (2000), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3091.2000.0325b.x
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  • 3
    Electronic Resource
    Electronic Resource
    Isotopic signature of burial diagenesis and primary lithological contrasts in periplatform carbonates (Miocene, Great Bahama Bank) (2000)
    Oxford UK : Blackwell Science Ltd
    Sedimentology 47 (2000), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The stable isotope geochemistry of Miocene sediments from the leeward margin of the Great Bahama Bank was examined to investigate burial diagenetic processes in periplatform carbonates. Data indicate that, in addition to differences in bulk proportions of neritic and pelagic carbonate along the slope, rhythmic variation in primary carbonate content has controlled patterns of burial diagenesis and associated geochemical signatures throughout much of the succession examined. The present study focuses on Ocean Drilling Program Sites 1006 and 1007, the most distal of five sites drilled from marginal to deep basin environments during Leg 166. These Miocene sections are characterized by their cyclic appearance, manifest as decimetre- to metre-scale alternations between light-coloured ooze/chalk/limestone and dark-coloured marl/marlstone. The section at Site 1006 contains a high proportion of pelagic carbonate and is unlithified to a subbottom depth of ∼675 m. Fluctuations in δ18O and δ13C values at this site are independent of lithological variation and reflect primary conditions. At Site 1007, located at the toe-of-slope and composed of a mixture of bank-derived and pelagic carbonate, limestones are densely cemented, show little evidence of compaction and have δ18O values up to 2‰ higher than coeval sediments at Site 1006. Marlstones at Site 1007 are poorly cemented, exhibit an increase in compaction-related features with depth and have lower and more variable δ18O values that are similar to those of coeval sediments at Site 1006. Isotopic and petrographic characteristics of limestone interbeds result from cement precipitation from cold sea water during the first ∼100 m of burial. Higher proportions of insoluble materials and pelagic carbonate seem to have inhibited diagenetic alteration in adjacent marlstones; in spite of significant compaction and pressure solution during burial, original isotopic compositions appear to be best preserved in these intervals at Site 1007. The documented contrasts in petrographic and isotopic patterns illustrate the role of primary sediment composition in controlling lithification processes in periplatform carbonates and stress the importance of considering such factors when interpreting geochemical data from ancient shelf and slope limestones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3091.2000.00344.x
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    Paper (German National Licenses)
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  • 4
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    Stable isotope record of Maestrichtian foraminifera
    PANGAEA
    In:  Supplement to: Frank, Tracy D; Arthur, Michael A (1999): Tectonic forcings of Maastrichtian ocean-climate evolution. Paleoceanography, 14(2), 103-117, https://doi.org/10.1029/1998PA900017
    Details
    Publication Date: 2023-05-12
    Description: A global compilation of deep-sea isotopic records suggests that Maastrichtian ocean-climate evolution was technically driven. During the early Maastrichtian the Atlantic intermediate-deep ocean was isolated from the Pacific, Indian, and Southern Oceans; deep water formed in the high-latitude North Atlantic and North Pacific. At the early/late Maastrichtian boundary a major reorganization of oceanic circulation patterns occurred, resulting in the development of a thermohaline circulation system similar to that of the modern oceans. A combination of isotopic and plate kinematic data suggests that this event was triggered by the final breaching of tectonic sills in the South Atlantic and the initiation of north-south flow of intermediate and deep water in the Atlantic. The onset of Laramide tectonism during the mid Maastrichtian led to the concurrent draining of major epicontinental seaways. Together, these events caused cooling, increased latitudinal temperature gradients, increased ventilation of the deep ocean, and affected a range of marine biota.
    Keywords: Deep Sea Drilling Project; DSDP
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 5
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    Stable isotope ratios of Maestrichtian foraminifera of DSDP Hole 80-548 (1999)
    PANGAEA
    Details
    Publication Date: 2023-07-10
    Keywords: 80-548; AGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Gavelinella sp., δ13C; Gavelinella sp., δ18O; Glomar Challenger; Leg80; Mass spectrometer Finnigan MAT 252; North Atlantic/SPUR; Nuttallides sp., δ13C; Nuttallides sp., δ18O; Rugoglobigerina sp., δ13C; Rugoglobigerina sp., δ18O; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 99 data points
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  • 6
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    Stable isotope ratios of Maestrichtian foraminifera of DSDP Hole 44-390 (1999)
    PANGAEA
    Details
    Publication Date: 2023-07-10
    Keywords: 44-390; AGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Gavelinella beccariiformis, δ13C; Gavelinella beccariiformis, δ18O; Gavelinella sp., δ13C; Gavelinella sp., δ18O; Glomar Challenger; Leg44; Mass spectrometer Finnigan MAT 252; North Atlantic; Nuttallides sp., δ13C; Nuttallides sp., δ18O; Nuttallides truempyi, δ13C; Nuttallides truempyi, δ18O; Pseudotextularia elegans, δ13C; Pseudotextularia elegans, δ18O; Pseudotextularia ultimatumida, δ13C; Pseudotextularia ultimatumida, δ18O; Rugoglobigerina rotundata, δ13C; Rugoglobigerina rotundata, δ18O; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 148 data points
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  • 7
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    Stable isotope ratios of Maestrichtian foraminifera of DSDP Hole 39-357
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 39-357; AGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Gavelinella beccariiformis, δ13C; Gavelinella beccariiformis, δ18O; Glomar Challenger; Leg39; Mass spectrometer Finnigan MAT 252; Nuttallides sp., δ13C; Nuttallides sp., δ18O; Pseudotextularia elegans, δ13C; Pseudotextularia elegans, δ18O; Pseudotextularia ultimatumida, δ13C; Pseudotextularia ultimatumida, δ18O; Rugoglobigerina rotundata, δ13C; Rugoglobigerina rotundata, δ18O; Sample code/label; South Atlantic/CONT RISE
    Type: Dataset
    Format: text/tab-separated-values, 198 data points
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  • 8
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    Stable carbon and oxygen isotope rates of Maastrichtian ODP samples from Shatsky Rise (2005)
    PANGAEA
    In:  Supplement to: Frank, Tracy D; Thomas, Deborah J; Leckie, R Mark; Arthur, Michael A; Bown, Paul R; Jones, Kelly; Lees, Jackie A (2005): The Maastrichtian record from Shatsky Rise (northwest Pacific): A tropical perspective on global ecological and oceanographic changes. Paleoceanography, 20(1), PA1008, https://doi.org/10.1029/2004PA001052
    Details
    Publication Date: 2024-01-09
    Description: We present new isotopic and micropaleontological data from a depth transect on Shatsky Rise that record the response of the tropical Pacific to global biotic and oceanographic shifts during the mid-Maastrichtian. Results reveal a coupling between the upper ocean, characterized by a weak thermocline and low to intermediate productivity, and intermediate waters. During the earliest Maastrichtian, oxygen and neodymium isotope data suggest a significant contribution of relatively warm intermediate water from the North Pacific. Isotopic shifts through the early Maastrichtian suggest that this warmer water mass was gradually replaced by cooler waters originating in the Southern Ocean. Although the cooler water mass remained dominant through the remainder of the Maastrichtian, it was displaced intermittently at shallow intermediate depths by North Pacific intermediate water. The globally recognized "mid-Maastrichtian event" ~69 Ma, manifested by the brief appearance of abundant inoceramid bivalves over shallow portions of Shatsky Rise, is characterized by an abrupt increase (~2°-3°C) in sea surface temperatures, a greater flux of organic matter out of the surface ocean, and warmer (~4°C) intermediate waters. Results implicate simultaneous changes in surface waters and the sources/distribution patterns of intermediate water masses as an underlying cause for widespread biotic and oceanographic changes during mid-Maastrichtian time.
    Keywords: 198-1209A; 198-1209C; 198-1210; 198-1212B; COMPCORE; Composite Core; Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Gavelinella beccariiformis, δ13C; Gavelinella beccariiformis, δ18O; Gavelinella sp., δ13C; Gavelinella sp., δ18O; Globigerinelloides prairiehillensis, δ13C; Globigerinelloides prairiehillensis, δ18O; Globotruncana arca, δ13C; Globotruncana arca, δ18O; Globotruncanita stuartiformis, δ13C; Globotruncanita stuartiformis, δ18O; Inoceramus spp., δ18O; Inoceramus spp. δ13C; Joides Resolution; Leg198; Mass spectrometer Finnigan MAT 252; North Pacific Ocean; Nuttallides truempyi, δ13C; Nuttallides truempyi, δ18O; Ocean Drilling Program; ODP; Planoglobulina multicamerata, δ13C; Planoglobulina multicamerata, δ18O; Rugoglobigerina rugosa, δ13C; Rugoglobigerina rugosa, δ18O; Sample code/label; δ13C, bulk carbonate; δ13C, carbonate; δ18O, bulk carbonate; δ18O, carbonate; ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 1574 data points
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  • 9
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    Whole rock geochemistry and stable isotopes of rocks, fragments and foraminifers from two ODP Leg 166 holes (2000)
    PANGAEA
    In:  Supplement to: Frank, Tracy D (2000): Data Report: Geochemistry of Miocene sediments, Sites 1006 and 1007, Leeward Margin, Great Bahama Bank. In: Swart, PK; Eberli, GP; Malone, MJ; Sarg, JF (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 166, 1-7, https://doi.org/10.2973/odp.proc.sr.166.124.2000
    Details
    Publication Date: 2024-01-09
    Description: Total carbon and carbonate contents, quantitative carbonate mineralogy, trace metal concentrations, and stable isotope compositions were determined on a suite of samples from the Miocene sections at Sites 1006 and 1007. The Miocene section at Site 1007, located at the toe-of-slope, contains a relatively high proportion of bank-derived components and becomes fully lithified at a depth of ~300 meters below seafloor (mbsf). By contrast, Miocene sediments at Site 1006, situated in Neogene drift deposits in the Straits of Florida and composed primarily of pelagic carbonates, do not become fully lithified until a depth of ~675 mbsf. Diagenetic and compositional contrasts between Sites 1006 and 1007 are reflected in geochemical data derived from sediment samples from each site.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 10
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    (Table 2) Whole rock geochemistry and stable isotopes of rocks, fragments and foraminifers from ODP Hole 166-1007C (2000)
    PANGAEA
    Details
    Publication Date: 2024-04-16
    Keywords: 166-1007C; Aragonite; Barium/Calcium ratio; Calcite; Calcium carbonate; Calculated; Calculated, CaCO3=(TC-TOC)*8.333; Carbon, organic, total; Cibicidoides sp., δ13C; Cibicidoides sp., δ18O; Comment; DEPTH, sediment/rock; Dolomite; DRILL; Drilling/drill rig; Foraminifera, planktic δ13C; Foraminifera, planktic δ18O; Inductively coupled plasma atomic emission spectroscope (ICP-AES); Iron/Calcium ratio; Isotope ratio mass spectrometry; Joides Resolution; Leg166; Magnesium/Calcium ratio; Manganese/Calcium ratio; Ocean Drilling Program; ODP; Quartz; Size fraction; South Atlantic Ocean; Strontium/Calcium ratio; X-ray diffraction (XRD); δ13C; δ18O
    Type: Dataset
    Format: text/tab-separated-values, 1168 data points
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