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  • PANGAEA  (119)
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  • 1
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    PANGAEA
    In:  Supplement to: Dickens, Gerald Roy; Backman, Jan (2013): Core alignment and composite depth scale for the lower Paleogene through uppermost Cretaceous interval at Deep Sea Drilling Project Site 577. Newsletters on Stratigraphy, 46(1), 47-68, https://doi.org/10.1127/0078-0421/2013/0027
    Publication Date: 2023-01-13
    Description: Deep Sea Drilling Project Site 577 on Shatsky Rise (North Pacific Ocean) recovered a series of cores at three holes that contain calcareous nannofossil ooze of latest Cretaceous (late Maastrichtian) through early Eocene age. Several important records have been generated using samples from these cores, but the stratigraphy has remained outdated and confusing. Here we revise the stratigraphy at Site 577. This includes refining several age datums, realigning cores in the depth domain, and placing all stratigraphic markers on a current time scale. The work provides a template for appropriately bringing latest Cretaceous and Paleogene data sets at old drill sites into current paleoceanographic literature for this time interval. While the Paleocene Eocene Thermal Maximum (PETM) lies within core gaps at Holes 577* and 577A, the sedimentary record at the site holds other important events and remains crucially relevant to understanding changes in oceanographic conditions from the latest Cretaceous through early Paleogene.
    Keywords: Deep Sea Drilling Project; DSDP
    Type: Dataset
    Format: application/zip, 14 datasets
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  • 2
    Publication Date: 2023-01-13
    Keywords: Age model; Age model, optional; Ageprofile Datum Description; Comment; Deep Sea Drilling Project; DSDP
    Type: Dataset
    Format: text/tab-separated-values, 195 data points
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  • 3
    Publication Date: 2023-01-30
    Description: It contains three tables that correspond to the supplementary information of the article mentioned above. Tables S1 and S2 can be found within the Supplementary Information document. Table S3 contains the characteristic remanent magnetisation (ChRM) directions (with associated sample position and confidence angle) used for the magnetostratigraphic correlation. Table S4 lists the calcareous nannofossil abundance for each rock sample expressed in number of specimens per squared millimetre. Table S5 is the foraminifera distribution chart.
    Keywords: biostratigraphy.; Eocene; Magnetostratigraphy; New Caledonia
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 4
    Publication Date: 2023-01-30
    Keywords: Angle of 95% confidence; biostratigraphy; ChRM, Declination; ChRM, Inclination; Eocene; Fischer statistics; HEIGHT above ground; Koumac, North Province, New Caledonia; Magnetostratigraphy; Maximum angular deviation; New Caledonia; Number of points; Sample ID; Sommet-Khian_section
    Type: Dataset
    Format: text/tab-separated-values, 775 data points
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  • 5
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    PANGAEA
    In:  Supplement to: Reghellin, Daniele; Dickens, Gerald Roy; Backman, Jan (2013): The relationship between wet bulk density and carbonate content in sediments from the Eastern Equatorial Pacific. Marine Geology, 344, 41-52, https://doi.org/10.1016/j.margeo.2013.07.007
    Publication Date: 2023-02-24
    Description: Sediment cores collected from the Eastern Equatorial Pacific Ocean display a clear positive second-order relationship between wet bulk density (WBD) and carbonate content. This has long interested the paleoceanography community because detailed Gamma Ray Attenuation Porosity Evaluator (GRAPE) measurements, which approximate WBD, might be used to determine records of carbonate content at very high temporal resolution. Although general causes for the relationship are known, they have not been presented and discussed systematically on the basis of first principles. In this study, we measure the mass and carbonate content of 50 sediment samples with known WBD from Site U1338, before and after rinsing with de-ionized water; we also determine the mass related proportion of coarse (〉 63 µm) material. Samples exhibit clear relationships between WBD, carbonate content, mass loss upon rinsing, and grain size. We develop a series of mathematical expressions to describe these relationships, and solve them numerically. As noted by previous workers, the second-order relationship between WBD and carbonate content results from the mixing of biogenic carbonate and biogenic silica, which have different grain densities and different porosities. However, at high carbonate content, a wide range in WBD occurs because samples with greater amounts of coarse carbonate have higher porosity. Moreover compaction impacts carbonate particles more than biogenic silica particles. As such, a single two-component equation cannot be used to determine carbonate content accurately across depth intervals where both the porosity and type of carbonate vary. Instead, the WBD-carbonate relationship is described by an infinite series of curves, each which represents mixing of multiple sediment components with different densities and porosities. Dissolved ions also precipitate from pore space during sample drying, which adds mass to the sediment. Without rinsing samples, simple empirical relationships between WBD and carbonate content are further skewed by salt dilution.
    Keywords: Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 6
    Publication Date: 2023-02-12
    Keywords: Acarinina collectea; Acarinina primitiva; biostratigraphy; Eocene; Globigerinatheka index; Hantkenina australis; Hantkenina spp.; HEIGHT above ground; Igorina sp.; Koumac, North Province, New Caledonia; Magnetostratigraphy; Morozovelloides crassatus; New Caledonia; Sample code/label; Sample ID; Sommet-Khian_section; Subbotina angiporoides; Subbotina senni; Turbortotalia cerroazulesis
    Type: Dataset
    Format: text/tab-separated-values, 90 data points
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  • 7
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    PANGAEA
    In:  Supplement to: Pagani, Mark; Pedentchouk, Nikolai; Huber, Matthew; Sluijs, Appy; Schouten, Stefan; Brinkhuis, Henk; Sinninghe Damsté, Jaap S; Dickens, Gerald Roy; Expedition 302 Scientists (2006): Arctic hydrology during global warming at the Palaeocene/Eocene thermal maximum. Nature, 442(10), 671-675, https://doi.org/10.1038/nature05043
    Publication Date: 2023-06-27
    Description: The Palaeocene/Eocene thermal maximum represents a period of rapid, extreme global warming approx ~55 million years ago, superimposed on an already warm world (Zachos et al., 2003, doi:10.1126/science.1090110; Bowen et al., 2004, doi:10.1038/nature03115; Thomas et al., 2002, doi:10.1130/0091-7613(2002)030〈1067:WTFFTF〉2.0.CO;2). This warming is associated with a severe shoaling of the ocean calcite compensation depth **4 and a 〉2.5 per mil negative carbon isotope excursion in marine and soil carbonates (Zachos et al., 2003, doi:10.1126/science.1090110; Bowen et al., 2004, doi:10.1038/nature03115; Thomas et al., 2002, doi:10.1130/0091-7613(2002)030〈1067:WTFFTF〉2.0.CO;2; Zachos et al., doi:10.1126/science.1109004). Together these observations indicate a massive release of 13C-depleted carbon (Zachos et al., doi:10.1126/science.1109004) and greenhouse-gas-induced warming. Recently, sediments were recovered from the central Arctic Ocean (Backman et al., 2006, doi:10.2204/iodp.proc.302.2006), providing the first opportunity to evaluate the environmental response at the North Pole at this time. Here we present stable hydrogen and carbon isotope measurements of terrestrial-plant- and aquatic-derived n-alkanes that record changes in hydrology, including surface water salinity and precipitation, and the global carbon cycle. Hydrogen isotope records are interpreted as documenting decreased rainout during moisture transport from lower latitudes and increased moisture delivery to the Arctic at the onset of the Palaeocene/Eocene thermal maximum, consistent with predictions of poleward storm track migrations during global warming (Backman et al., 2006, doi:10.2204/iodp.proc.302.2006). The terrestrial-plant carbon isotope excursion (about ~4.5 to ~6 per mil) is substantially larger than those of marine carbonates. Previously, this offset was explained by the physiological response of plants to increases in surface humidity (Bowen et al., 2004, doi:10.1038/nature03115). But this mechanism is not an effective explanation in this wet Arctic setting, leading us to hypothesize that the true magnitude of the excursion - and associated carbon input - was greater than originally surmised. Greater carbon release and strong hydrological cycle feedbacks may help explain the maintenance of this unprecedented warmth.of this unprecedented warmth.
    Keywords: 302-M0004A; ACEX-M4A; Arctic Coring Expedition, ACEX; Arctic Ocean; CCGS Captain Molly Kool (Vidar Viking); DEPTH, sediment/rock; Exp302; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Mass spectrometer, Finnigan, MAT 253; n-Alkane C17, δ13C; n-Alkane C17, δ13C, standard deviation; n-Alkane C17, δD; n-Alkane C17, δD, standard deviation; n-Alkane C27, δ13C; n-Alkane C27, δ13C, standard deviation; n-Alkane C27, δD; n-Alkane C27, δD, standard deviation; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C29, δD; n-Alkane C29, δD, standard deviation; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 417 data points
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  • 8
    Publication Date: 2023-06-27
    Keywords: 90-590B; Aluminium/Titanium ratio; Aluminium oxide; Barium; Barium/Titanium ratio; Calcium/Titanium ratio; Calcium oxide; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Iron oxide, Fe2O3; Leg90; Loss on ignition; Sample code/label; Silicon/Aluminium ratio; Silicon dioxide; South Pacific/Tasman Sea/CONT RISE; Titanium dioxide; X-ray fluorescence (XRF)
    Type: Dataset
    Format: text/tab-separated-values, 384 data points
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  • 9
    Publication Date: 2023-06-27
    Keywords: 90-590A; 90-590B; Age, comment; Age model; Ageprofile Datum Description; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Leg90; South Pacific/Tasman Sea/CONT RISE
    Type: Dataset
    Format: text/tab-separated-values, 150 data points
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  • 10
    Publication Date: 2023-06-27
    Keywords: 90-590B; AGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Globigerina bulloides, δ13C; Globigerinoides sacculifer, δ13C; Glomar Challenger; Isotope ratio mass spectrometry; Leg90; Nitrogen, organic, dissolved; Orbulina universa, δ13C; Sample code/label; South Pacific/Tasman Sea/CONT RISE; δ13C, carbonate
    Type: Dataset
    Format: text/tab-separated-values, 226 data points
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