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  • 1
    Series available for loan
    Series available for loan
    Volcanic rifted margins (2002)
    Boulder, Colo. : The Geological Society of America
    Associated volumes
    Details Availability
    Call number: S 90.0095(362)
    In: Special paper / The Geological Society of America, 362
    Type of Medium: Series available for loan
    Pages: VI, 230 Seiten , Illustrationen, graphische Darstellungen, Karten
    ISBN: 0-8137-2362-0
    Series Statement: Special paper / The Geological Society of America 362
    URL: http://digitale-objekte.hbz-nrw.de/storage2/2018/06/15/file_365/7918592.pdf
    Language: English
    Note: Preface 1. Characteristics of volcanic rifted margins Martin A. Menzies, Simon L. Klemperer, Cynthia J. Ebinger, and Joel Baker 2. Crust and upper mantle structure in East Africa: Implications for the origin of Cenozoic rifting and volcanism and the formation of magmatic rifted margins Andrew A. Nyblade 3. Development of the Lebombo rifted volcanic margin of southeast Africa M.K. Watkeys 4. Extension and uplift of the northern Rio Grande Rift: Evidence from ⁴⁰Ar/³⁹Ar geochronology from the Sangre de Cristo Mountains, south-central Colorado and northern New Mexico Daniel P. Miggins, Ren A. Thompson, Charles L. Pillmore, Lawrence W. Snee, and Charles R. Stern 5. Lithospheric mantle beneath Arabia: A Pan-African protolith modified by the Afar and older plumes, rather than a source for continental flood volcanism? Joel Baker, Gilles Chazot, Martin A. Menzies, and Matthew Thirlwall 6. Petrogenesis of the Late Cretaceous tholeiitic magmatism in the passive margins of northeastern Madagascar Leone Melluso, Vincenzo Morra, Pietro Brotzu, Massimo D'Antonio, and Lucia Bennio 7. Silicic volcanism: An undervalued component of large igneous provinces and volcanic rifted margins Scott E. Bryan, Teal R. Riley, Dougal A. Jerram, Christopher J. Stephens, and Philip T Leat 8. Volcanology and fades architecture of flood basalts Dougal A. Jerram 9. East Greenland coast-parallel dike swarm and its role in continental breakup Martin Bromann Klausen and Hans Christian Larsen 10. Crustal architecture of South Atlantic volcanic margins W.U. Mohriak, B.R. Rosendahl, J.P. Turner, and S.C. Valente 11. Volcanic passive margin of Namibia: A potential fields perspective B. Corner, J. Cartwright, and R. Swart 12. Petrophysical modeling of high seismic velocity crust at the Namibian volcanic margin R.B. Trumbull, S.V. Sobolev, and K. Bauer
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
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    (Appendix) Afro-Arabian flood volcanism Pb isotope ratios
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Area/locality; LATITUDE; Lead-206/Lead-204 ratio; Lead-206/Lead-204 ratio, error; Lead-207/Lead-204 ratio; Lead-207/Lead-204 ratio, error; Lead-207/Lead-206, standard error; Lead-207/Lead-206 ratio; Lead-208/Lead-204 ratio; Lead-208/Lead-204 ratio, error; Lead-208/Lead-206 ratio; Lead-208/Lead-206 ratio, error; LONGITUDE; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Sample code/label; Sample type
    Type: Dataset
    Format: text/tab-separated-values, 2677 data points
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  • 3
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    Trace element ratios of Globigerina bulloides from the southwest Pacific Ocean
    PANGAEA
    In:  Supplement to: Marr, Julene P; Baker, Joel A; Carter, Lionel; Allan, Adrian S R; Dunbar, Gavin B; Bostock, Helen C (2011): Ecological and temperature controls on Mg/Ca ratios of Globigerina bulloides from the southwest Pacific Ocean|. Paleoceanography, 26(2), PA2209, https://doi.org/10.1029/2010PA002059
    Details
    Publication Date: 2023-05-12
    Description: We present Mg/Ca data for Globigerina bulloides from 10 core top sites in the southwest Pacific Ocean analyzed by laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). Mg/Ca values in G. bulloides correlate with observed ocean temperatures (7°C-19°C), and when combined with previously published data, an integrated Mg/Ca-temperature calibration for 7°C-31°C is derived where Mg/Ca (mmol/mol) = 0.955 * e**(0.068 * T) (r**2 = 0.95). Significant variability of Mg/Ca values (20%-30%) was found for the four visible chambers of G. bulloides, with the final chamber consistently recording the lowest Mg/Ca and is interpreted, in part, to reflect changes in the depth habitat with ontogeny. Incipient and variable dissolution of the thin and fragile final chamber, and outermost layer concomitantly added to all chambers, caused by different cleaning techniques prior to solution-based ICPMS analyses, may explain the minor differences in previously published Mg/Ca-temperature calibrations for this species. If the lower Mg/Ca of the final chamber reflects changes in depth habitat, then LA-ICPMS of the penultimate (or older) chambers will most sensitively record past changes in near-surface ocean temperatures. Mean size-normalized G. bulloides test weights correlate negatively with ocean temperature (T = 31.8 * e**(-30.5*wtN); r**2 = 0.90), suggesting that in the southwest Pacific Ocean, temperature is a prominent control on shell weight in addition to carbonate ion levels.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 4
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    (Table 1) Sedimentation rates and ages of surface sediment samples from the southwest Pacific Ocean
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age, 14C AMS; Age, dated; Age, dated standard deviation; Calculated; CHAT 10K; D178; DEPTH, sediment/rock; Dredge; DRG; Elevation of event; Event label; F111; GC; Gravity corer; Hikurangi margin; KAL; Kasten corer; KULC; KULLENBERG corer; Latitude of event; Longitude of event; P69; P71; P81; Q220; R623; S793; S938; Sedimentation rate; South Pacific
    Type: Dataset
    Format: text/tab-separated-values, 18 data points
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  • 5
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    (Table S2) Trace element chemistry for Globigerina bulloides from core top sites in the southwest Pacific Ocean
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: B32; CHAT 10K; D178; DEPTH, sediment/rock; Description; Dredge; DRG; Elevation of event; Event label; F111; GC; Globigerina bulloides, Aluminium/Calcium ratio; Globigerina bulloides, Aluminium/Calcium ratio, error; Globigerina bulloides, Barium/Calcium ratio; Globigerina bulloides, Barium/Calcium ratio, error; Globigerina bulloides, Magnesium/Calcium ratio; Globigerina bulloides, Magnesium/Calcium ratio, error; Globigerina bulloides, Manganese/Calcium ratio; Globigerina bulloides, Manganese/Calcium ratio, error; Globigerina bulloides, Strontium/Calcium ratio; Globigerina bulloides, Strontium/Calcium ratio, error; Globigerina bulloides, Zinc/Calcium ratio; Globigerina bulloides, Zinc/Calcium ratio, error; Grab; GRAB; Gravity corer; Hikurangi margin; KAL; Kasten corer; KULC; KULLENBERG corer; Latitude of event; Longitude of event; Number of measurements; P69; P71; P81; Q220; R623; S793; S938; South Pacific
    Type: Dataset
    Format: text/tab-separated-values, 560 data points
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  • 6
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    Geochemistry of tephra from the Taupo Volcanic Zone (2008)
    PANGAEA
    In:  Supplement to: Allan, Adrian S R; Baker, Joel A; Carter, Lionel; Wysoczanski, Richard J (2008): Reconstructing the Quaternary evolution of the world's most active silicic volcanic system: insights from an ~1.65 Ma deep ocean tephra record sourced from Taupo Volcanic Zone, New Zealand. Quaternary Science Reviews, 27(25-26), 2341-2360, https://doi.org/10.1016/j.quascirev.2008.09.003
    Details
    Publication Date: 2024-01-09
    Description: The Taupo Volcanic Zone (TVZ), central North Island, New Zealand, is the most frequently active Quaternary rhyolitic system in the world. Silicic tephras recovered from Ocean Drilling Programme Site 1123 (41°47.16'S, 171°29.94'W; 3290 m water depth) in the southwest Pacific Ocean provide a well-dated record of explosive TVZ volcanism since ~1.65 Ma. We present major, minor and trace element data for 70 Quaternary tephra layers from Site 1123 determined by electron probe microanalysis (1314 analyses) and laser ablation inductively coupled plasma mass spectrometry (654 analyses). Trace element data allow for the discrimination of different tephras with similar major element chemistries and the establishment of isochronous tie-lines between three sediment cores (1123A, 1123B and 1123C) recovered from Site 1123. These tephra tie-lines are used to evaluate the stratigraphy and orbitally tuned stable isotope age model of the Site 1123 composite record. Trace element fingerprinting of tephras identifies ~4.5 m and ~7.9 m thick sections of repeated sediments in 1123A (49.0-53.5 mbsf [metres below seafloor]) and 1123C (48.1-56.0 mbsf), respectively. These previously unrecognised repeated sections have resulted in significant errors in the Site 1123 composite stratigraphy and age model for the interval 1.15-1.38 Ma and can explain the poor correspondence between d18O profiles for Site 1123 and Site 849 (equatorial Pacific) during this interval. The revised composite stratigraphy for Site 1123 shows that the 70 tephra layers, when correlated between cores, correspond to ~37-38 individual eruptive events (tephras), 7 of which can be correlated to onshore TVZ deposits. The frequency of large-volume TVZ-derived silicic eruptions, as recorded by the deposition of tephras at Site 1123, has not been uniform through time. Rather it has been typified by short periods (25-50 ka) of intense activity bracketed by longer periods (100-130 ka) of quiescence. The most active period (at least 1 event per 7 ka) occurred between ~1.53 and 1.66 Ma, corresponding to the first ~130 ka of TVZ rhyolitic magmatism. Since 1.2 Ma, ~80% of tephras preserved at Site 1123 and the more proximal Site 1124 were erupted and deposited during glacial periods. This feature may reflect either enhanced atmospheric transport of volcanic ash to these sites (up to 1000 km from source) during glacial conditions or, more speculatively, that these events are triggered by changes in crustal stress accumulation associated with large amplitude sea-level changes. Only 8 of the ~37-38 Site 1123 tephra units (~20%) can be found in all three cores, and 22 tephra units (~60%) are only present in one of the three cores. Whether a tephra is preserved in all three cores does not have any direct relationship to eruptive volume. Instead it is postulated that tephra preservation at Site 1123 is 'patchy' and influenced by the vigorous nature of their deposition to the deep ocean floor as vertical density currents. At this site, at least 5 cores would need to have been drilled within a proximity of 10's to 100's of metres of each other to yield a 〉99% chance of recovering all the silicic tephras deposited on the ocean surface above it in the past 1.65 Ma.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 10 datasets
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  • 7
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    Geochemistry of Indian Ocean tephra and Afro-Arabian lavas (2003)
    PANGAEA
    In:  Supplement to: Ukstins Peate, Ingrid; Baker, Joel A; Kent, Adam J R; Al-Kadasi, Mohamed; Al-Subbary, Abdulkarim; Ayalew, Dereje; Menzies, Martin (2003): Correlation of Indian Ocean tephra to individual Oligocene silicic eruptions from Afro-Arabian flood volcanism. Earth and Planetary Science Letters, 211(3-4), 311-327, https://doi.org/10.1016/S0012-821X(03)00192-4
    Details
    Publication Date: 2024-01-09
    Description: Widespread silicic pyroclastic eruptions of the Oligocene Afro-Arabian flood volcanic province (ignimbrites and airfall tuffs) produced up to 20% of the total flood volcanic stratigraphy (〉6*10**4 km**3). Volumes of individual ignimbrites and tuffs exposed on land range from ~150 to 〉2000 km**3 and eight major units (15-100 m thick) were erupted in 〈2 Myr, placing these amongst the largest-magnitude silicic pyroclastic eruptions on Earth. They are compositionally distinctive time-stratigraphic markers which were deposited as co-ignimbrite ashfall deposits on a near-global scale around the time of the Oi2 cooling anomaly at ~30 Ma. Two ignimbrites from the lower part of the flood volcanic succession in Yemen have been correlated to: (a) the conjugate rifted margin of Ethiopia (〉500 km distant); and (b) to two deep sea ash layers sampled by ODP Leg 115 in the Indian Ocean ~2700 km to the southeast. This correlation is based on whole rock analyses of silicic units for isotope ratios (Pb, Nd) and rare earth element compositions, in conjunction with novel in situ Pb isotope laser ablation multicollector inductively coupled plasma mass spectroscopy analysis of groundmass and glass shards. Compositional diversity preserved on the scale of individual ash shards in these deep sea tephra layers record chemical heterogeneity present in the silicic magma chambers that is not evident in the welded on-land deposits. Ages of the ash layers can be established by correlation to precisely dated on-land ignimbrites, and current evidence suggests that while these eruptions may have exacerbated already changing climatic conditions, they both marginally post-date the Oi2 global cooling anomaly.
    Keywords: 115-711A; DRILL; Drilling/drill rig; Joides Resolution; Leg115; Ocean Drilling Program; ODP; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 8
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    (Table S3a) Major element compositions of ODP Hole 181-1123A tephras (2008)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 181-1123A; Aluminium oxide; Aluminium oxide, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Chlorine; Chlorine, standard deviation; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Elements, total; Elements, total, standard deviation; Iron oxide, FeO; Iron oxide, FeO, standard deviation; Joides Resolution; Leg181; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; Ocean Drilling Program; ODP; Potassium oxide; Potassium oxide, standard deviation; Replicates; Sample code/label; Sample ID; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; South Pacific Ocean; Titanium dioxide; Titanium dioxide, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 800 data points
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  • 9
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    (Table S3d) Major element compositions of onshore Taupo Volcanic Zone tephras (2008)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: Aluminium oxide; Aluminium oxide, standard deviation; Area/locality; Calcium oxide; Calcium oxide, standard deviation; Chlorine; Chlorine, standard deviation; Electron microprobe (EMP); Elements, total; Elements, total, standard deviation; Iron oxide, FeO; Iron oxide, FeO, standard deviation; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; New Zealand; Ocean Drilling Program; ODP; ORDINAL NUMBER; Potassium oxide; Potassium oxide, standard deviation; Replicates; Sample ID; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; Tephra/volcanic ash; Titanium dioxide; Titanium dioxide, standard deviation; Waiouru
    Type: Dataset
    Format: text/tab-separated-values, 78 data points
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  • 10
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    (Table S5) Tephra tie-lines established between the Site ODP 181-1123 sediment cores (2008)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 181-1123; COMPCORE; Composite Core; Depth, composite revised; Depth, relative; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Joides Resolution; Layer description; Leg181; Ocean Drilling Program; ODP; Sample code/label; Sample code/label 2; South Pacific Ocean
    Type: Dataset
    Format: text/tab-separated-values, 122 data points
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