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  • 1
    Monograph available for loan
    Monograph available for loan
    Biogeochemical controls on palaeoceanographic environmental proxies (2008)
    London : The Geological Society
    Associated volumes
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    Call number: 9/M 07.0421(303)
    In: Geological Society special publication
    Type of Medium: Monograph available for loan
    Pages: 192 S.
    ISBN: 9781862392571
    Series Statement: Geological Society special publication 303
    URL: http://sp.lyellcollection.org/content/vol303/issue1/
    Classification:
    Geochemistry
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
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    Biogeochemical Controls on Palaeoceanographic Environmental Proxies (2008)
    London : The Geological Society
    Details
    Description / Table of Contents: Biogeochemical controls on palaeoceanographic environmental proxies: an introduction / William E. N. Austin and Rachael H. James / Geological Society, London, Special Publications, 303, 1-2, 1 January 2008, https://doi.org/10.1144/SP303.1 --- Biogeochemical controls on palaeoceanographic environmental proxies: a review / Rachael H. James and William E. N. Austin / Geological Society, London, Special Publications, 303, 3-32, 1 January 2008, https://doi.org/10.1144/SP303.2 --- Some fundamental features of biomineralization / R. J. P. Williams / Geological Society, London, Special Publications, 303, 33-44, 1 January 2008, https://doi.org/10.1144/SP303.3 --- Vital effects and beyond: a modelling perspective on developing palaeoceanographical proxy relationships in foraminifera / Richard E. Zeebe, Jelle Bijma, Bärbel Hönisch, Abhijit Sanyal, Howard J. Spero and Dieter A. Wolf-Gladrow / Geological Society, London, Special Publications, 303, 45-58, 1 January 2008, https://doi.org/10.1144/SP303.4 --- Foraminifer test preservation and diagenesis: comparison of high latitude Eocene sites / Paul N. Pearson and Catherine E. Burgess / Geological Society, London, Special Publications, 303, 59-72, 1 January 2008, https://doi.org/10.1144/SP303.5 --- The influences of growth rates on planktic foraminifers as proxies for palaeostudies – a review / D. N. Schmidt, T. Elliott and S. A. Kasemann / Geological Society, London, Special Publications, 303, 73-85, 1 January 2008, https://doi.org/10.1144/SP303.6 --- Fine-scale growth patterns in coral skeletons: biochemical control over crystallization of aragonite fibres and assessment of early diagenesis / J. P. Cuif, Y. Dauphin, A. Meibom, C. Rollion-Bard, M. Salomé, J. Susini and C. T. Williams / Geological Society, London, Special Publications, 303, 87-96, 1 January 2008, https://doi.org/10.1144/SP303.7 --- Modern deep-sea benthic foraminifera: a brief review of their morphology-based biodiversity and trophic diversity / A. J. Gooday, H. Nomaki and H. Kitazato / Geological Society, London, Special Publications, 303, 97-119, 1 January 2008, https://doi.org/10.1144/SP303.8 --- On the use of benthic foraminiferal δ13C in palaeoceanography: constraints from primary proxy relationships / Andreas Mackensen / Geological Society, London, Special Publications, 303, 121-133, 1 January 2008, https://doi.org/10.1144/SP303.9 --- The carbon and oxygen stable isotopic composition of cultured benthic foraminifera / Daniel C. McCorkle, Joan M. Bernhard, Christopher J. Hintz, Jessica K. Blanks, G. Thomas Chandler and Timothy J. Shaw / Geological Society, London, Special Publications, 303, 135-154, 1 January 2008, https://doi.org/10.1144/SP303.10 --- Seasonal dynamics of coastal water masses in a Scottish fjord and their potential influence on benthic foraminiferal shell geochemistry / Alix G. Cage and William E. N. Austin / Geological Society, London, Special Publications, 303, 155-172, 1 January 2008, https://doi.org/10.1144/SP303.11 --- Isotopic variability in the intertidal acorn barnacle Semibalanus balanoides: a potentially novel sea-level proxy indicator / K. F. Craven, M. I. Bird, W. E. N. Austin and J. Wynn / Geological Society, London, Special Publications, 303, 173-185, 1 January 2008, https://doi.org/10.1144/SP303.12
    Pages: Online-Ressource (192 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 9781862395510
    URL: https://sp.lyellcollection.org/content/303/1
    Language: English
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  • 3
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    Temperature, salinity, methane concentration, oxidation rates and methanotrophic cell number at Svalbard seeps in summer 2011 and 2012 (cruises POS419 and MSM21/4) (2015)
    PANGAEA
    In:  Supplement to: Steinle, Lea; Graves, Carolyn; Treude, Tina; Ferre, Benedicte; Biastoch, Arne; Bussmann, Ingeborg; Berndt, Christian; Krastel, Sebastian; James, Rachael H; Behrens, Erik; Böning, Claus W; Greinert, Jens; Sapart, Célia-Julia; Scheinert, Markus; Sommer, Stefan; Lehmann, Moritz F; Niemann, Helge (2015): Water column methanotrophy controlled by a rapid oceanographic switch. Nature Geoscience, 8(5), 378–382, https://doi.org/10.1038/ngeo2420
    Details
    Publication Date: 2023-03-03
    Description: Large amounts of the greenhouse gas methane are released from the seabed to the water column where it may be consumed by aerobic methanotrophic bacteria. This microbial filter is consequently the last marine sink for methane before its liberation to the atmosphere. The size and activity of methanotrophic communities, which determine the capacity of the water column methane filter, are thought to be mainly controlled by nutrient and redox dynamics, but little is known about the effects of ocean currents. Here, we report measurements of methanotrophic activity and biomass (CARD-FISH) at methane seeps west of Svalbard, and related them to physical water mass properties (CTD) and modelled current dynamics. We show that cold bottom water containing a large number of aerobic methanotrophs was rapidly displaced by warmer water with a considerably smaller methanotrophic community. This water mass exchange, caused by short-term variations of the West Spitsbergen Current, constitutes a rapid oceanographic switch severely reducing methanotrophic activity in the water column. Strong and fluctuating currents are widespread oceanographic features common at many methane seep systems and are thus likely to globally affect methane oxidation in the ocean water column.
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 4
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    Temperature and salinity profiles of Poseidon cruise POS419 at Svalbard seeps in summer 2011 (2015)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: Campaign of event; CTD/Rosette; CTD-RO; Date/Time of event; Depth, bottom/max; DEPTH, water; Event label; Latitude of event; Longitude of event; Norway, Norwegian Basin; POS419; POS419_599-2; POS419_615-9; POS419_654-33; POS419_671-36; Poseidon; Salinity; Sample code/label; Temperature, water; Type
    Type: Dataset
    Format: text/tab-separated-values, 180 data points
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  • 5
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    Methane concentration, oxidation rates and abundance of bacteria during Poseidon cruise POS419 at Svalbard seeps in summer 2011 (2015)
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    Details
    Publication Date: 2023-03-03
    Keywords: 3H-CH4 incubation; Campaign of event; CTD/Rosette; CTD-RO; Date/Time of event; Depth, bottom/max; DEPTH, water; Event label; Latitude of event; Longitude of event; Methane; Methane oxidation rate; Methane oxidation rate, standard deviation; Norway, Norwegian Basin; POS419; POS419_599-2; POS419_615-9; POS419_654-33; POS419_671-36; Poseidon; Sample code/label; Turnover rate, methane oxidation; Turnover rate, standard deviation; Type
    Type: Dataset
    Format: text/tab-separated-values, 229 data points
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  • 6
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    Geochemical data for drilled powder samples from two fossil Porites corals from Integrated Ocean Drilling Program Expedition 310
    PANGAEA
    In:  Supplement to: Hathorne, Ed C; Felis, Thomas; James, Rachael H; Thomas, Alexander L (2011): Laser ablation ICP-MS screening of corals for diagenetically affected areas applied to Tahiti corals from the last deglaciation. Geochimica et Cosmochimica Acta, 75, 1490-1506, https://doi.org/10.1016/j.gca.2010.12.011
    Details
    Publication Date: 2023-06-27
    Description: Fossil corals are unique archives of past seasonal climate variability, providing vital information about seasonal climate phenomena such as ENSO and monsoons. However, submarine diagenetic processes can potentially obscure the original climate signals and lead to false interpretations. Here we demonstrate the potential of laser ablation ICP-MS to rapidly detect secondary aragonite precipitates in fossil Porites colonies recovered by Integrated Ocean Drilling Program (IODP) Expedition 310 from submerged deglacial reefs off Tahiti. High resolution (100 µm) measurements of coralline B/Ca, Mg/Ca, S/Ca, and U/Ca ratios are used to distinguish areas of pristine skeleton from those afflicted with secondary aragonite. Measurements of coralline Sr/Ca, U/Ca and oxygen isotope ratios, from areas identified as pristine, reveal that the seasonal range of sea surface temperature in the tropical south Pacific during the last deglaciation (14.7 and 11 ka) was similar to that of today.
    Keywords: 310-M0007B; 310-M0025B; Boron/Calcium ratio; DISTANCE; DP Hunter; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Exp310; Inductively coupled plasma - mass spectrometry (ICP-MS); Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Magnesium/Calcium ratio; Manganese/Calcium ratio; Mass spectrometry; Sample code/label; Sample code/label 2; Strontium/Calcium ratio; TAH-02A-5H; TAH-03A-3A; Tahiti, offshore Maraa; Tahiti, offshore Tiarei; Tahiti Sea Level; Uranium/Calcium ratio; δ13C, skeletal carbonate; δ18O, skeletal carbonate
    Type: Dataset
    Format: text/tab-separated-values, 1038 data points
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  • 7
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    Mineral, chemical and isotopic compositions of hydrothermally altered sediments from the Middle Valley (Juan de Fuca Ridge), ODP Site 139-858 (2004)
    PANGAEA
    In:  Supplement to: Decitre, Sylvie; Buatier, Martine D; James, Rachael H (2004): Li and Li isotopic composition of hydrothermally altered sediments at Middle Valley, Juan De Fuca. Chemical Geology, 211(3-4), 363-373, https://doi.org/10.1016/j.chemgeo.2004.07.005
    Details
    Publication Date: 2024-01-09
    Description: Li and Li isotopes have been measured in the clay fraction of sediments recovered from the Middle Valley hydrothermal site on the Juan De Fuca Ridge. The Li content of pure detrital clays is 51 ppm while hydrothermal clays and carbonates have lower Li (22+/-11 ppm). However, there is no clear relationship between the mineralogy of the hydrothermal alteration products and their Li content. The d7Li value of the detrital clays is +5.8‰. Hydrothermal clays and carbonates have d7Li in the range of -3.9‰ to +7.8‰; these values do not seem to be dependent on the temperature at which they formed. Modelling of the Li and Li isotope systematics indicates that the fluid from which the alteration products form is significantly enriched in Li (higher than 10000 µmol/kg) relative to pore fluids recovered from within the sediments (up to 589 µmol/kg; [Wheat, C.G., M.J. Mottl, 1994. Data report: trace metal composition of pore water from Sites 855 through 858, Middle valley, Juan De Fuca Ridge. In Mottl, M.J., Davis, E.E., Fisher, A.T., Slack, J.F. (Eds.), Proc. ODP, Sci. Res. 139: 749–755; doi:10.2973/odp.proc.sr.139.269.1994]), and that this Li is derived from sediment. Thus, the alteration products are not in equilibrium with their conjugate pore fluids; rather, the alteration minerals formed at lower water/sediment ratios. This suggests that fluid flow pathways at Middle Valley were more diffuse in the past than they are today.
    Keywords: 139-858A; 139-858B; DRILL; Drilling/drill rig; Joides Resolution; Leg139; North Pacific Ocean; Ocean Drilling Program; ODP
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    Format: application/zip, 4 datasets
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  • 8
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    The alkali element and boron geochemistry of ODP Site 169-1038 in the Escanaba Trough, East Pacific (1999)
    PANGAEA
    In:  Supplement to: James, Rachael H; Rudnicki, Mark D; Palmer, Martin R (1999): The alkali element and boron geochemistry of the Escanaba Trough sediment-hosted hydrothermal system. Earth and Planetary Science Letters, 171(1), 157-169, https://doi.org/10.1016/S0012-821X(99)00140-5
    Details
    Publication Date: 2024-01-09
    Description: A suite of conjugate pore fluid and sediment samples were collected during Leg 169 of the ODP from within the clastic sedimentary sequences which host massive sulphides at Central Hill, Escanaba Trough (ODP Site 1038). We report the alkali element and boron, and Li and B isotope data for these samples. Relative to a reference site (Site 1037) located outside the zone of high heat flow, pore fluids from Site 1038 show a wide variation in Cl (300-800 mM), and have far higher concentrations of Li (up to 6.2 mM), B (up to 9.7 mM), Cs (up to 5.0 mM), and Rb (up to 97 mM). We show that the pore fluids are derived from hydrothermal circulation that has extended into the basement oceanic crust, with input of the alkali elements and B as the rising hydrothermal fluids interact geochemically with the overlying clastic sediments. There is, however, no marked depletion of these elements in the conjugate sediments, suggesting that there has been advective transport of fluids away from the primary hydrothermal reaction site. This is supported by modelling of the Li and B isotope systematics of the pore fluids, which shows that they record extensive formation of secondary minerals during cooling of the fluids from ~350 to ~20ºC. Precipitation of metal-rich sulphides would have occurred prior to the formation of these minerals, thus, the pore fluid Li and B isotope data can place important constraints on the locus of sulphide deposition beneath the seafloor at Escanaba.
    Keywords: 169-1038A; 169-1038B; 169-1038C; 169-1038D; 169-1038F; 169-1038G; 169-1038H; 169-1038I; DRILL; Drilling/drill rig; Escanaba Trough, North Pacific Ocean; Joides Resolution; Leg169; Ocean Drilling Program; ODP
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    Format: application/zip, 2 datasets
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  • 9
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    Chemical and isotopic compositions of pore fluids from ODP Sites 169-1034 and 169-1037 (2000)
    PANGAEA
    In:  Supplement to: James, Rachael H; Palmer, Martin R (2000): Marine geochemical cycles of the alkali elements and boron: The role of sediments. Geochimica et Cosmochimica Acta, 64(18), 3111-3122, https://doi.org/10.1016/S0016-7037(00)00418-X
    Details
    Publication Date: 2024-01-09
    Description: We have analysed the concentrations of Li, K, Rb, Cs, and B, and the isotopic ratios of Li and B of a suite of pore fluids recovered from ODP Sites 1037 (Leg 169; Escanaba Trough) and 1034 (Leg 169S; Saanich Inlet). In addition, we have analysed dissolved K, Rb, and Cs concentrations for estuarine mixing of the Ganges-Brahmaputra river system. Together, these data sets have been used to assess the role of sediments in the marine geochemical cycles of the alkali elements and boron. Uptake onto clay minerals during estuarine mixing removes 20-30% of the riverine input of dissolved Cs and Rb to the oceans. Prior to this study, the only other recognised sink of Rb and Cs was uptake during low-temperature alteration of the oceanic crust. Even with this additional sink there is an excess of inputs over outputs in their modern oceanic mass balance. Pore fluid data show that Li and Rb are transferred into marine sediments during early diagenesis. However, modeling of the Li isotope systematics of the pore fluids from Site 1037 shows that seawater Li taken up during marine sedimentation can be readily returned to solution in the presence of less hydrated cations, such as NH4+. This process also appears to result in high concentrations of pore fluid Cs (relative to local seawater) due to expulsion of adsorbed Cs from cation exchange sites. Flux calculations based on pore fluid data for a series of ODP sites indicate that early diagenesis of clay sediments removes around 8% of the modern riverine input of dissolved Li. Although NH4+-rich fluids do result in a flux of Cs to the oceans, on the global scale this input only augments the modern riverine Cs flux by ~3%. Nevertheless, this may have implications for the fate of radioactive Cs in the natural environment and waste repositories.
    Keywords: 169-1034; 169-1037; Coastal waters of SE Alaska; COMPCORE; Composite Core; Escanaba Trough, North Pacific Ocean; Joides Resolution; Leg169; Leg169S; Ocean Drilling Program; ODP
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    Format: application/zip, 2 datasets
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  • 10
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    (Appendix) Stable carbon and oxygen isotopes, and Mg/Ca ratios of foraminifera from ODP Hole 154-925A (2012)
    PANGAEA
    In:  Supplement to: Stewart, Joseph A; Wilson, Paul A; Edgar, Kirsty M; Anand, Pallavi; James, Rachael H (2012): Geochemical assessment of the palaeoecology, ontogeny, morphotypic variability and palaeoceanographic utility of “Dentoglobigerina” venezuelana. Marine Micropaleontology, 84-85, 74-86, https://doi.org/10.1016/j.marmicro.2011.11.003
    Details
    Publication Date: 2024-01-09
    Description: To better understand the links between the carbon cycle and changes in past climate over tectonic timescales we need new geochemical proxy records of secular change in silicate weathering rates. A number of proxies are under development, but some of the most promising (e.g. palaeoseawater records of Li and Nd isotope change) can only be employed on such large samples of mono-specific foraminifera that application to the deep sea sediment core archive becomes highly problematic. "Dentoglobigerina" venezuelana presents a potentially attractive target for circumventing this problem because it is a typically large (〉 355 mm diameter), abundant and cosmopolitan planktic foraminifer that ranges from the early Oligocene to early Pliocene. Yet considerable taxonomic and ecological uncertainties associated with this taxon must first be addressed. Here, we assess the taxonomy, palaeoecology, and ontogeny of "D." venezuelana using stable isotope (oxygen and carbon) and Mg/Ca data measured in tests of late Oligocene to early Miocene age from Ocean Drilling Program (ODP) Site 925, on Ceara Rise, in the western equatorial Atlantic. To help constrain the depth habitat of "D." venezuelana relative to other species we report the stable isotope composition of selected planktic foraminifera species within Globigerina, Globigerinoides, Paragloborotalia and Catapsydrax. We define three morphotypes of "D." venezuelana based on the morphology of the final chamber and aperture architecture. We determine the trace element and stable isotope composition of each morphotype for different size fractions, to test the validity of pooling these morphotypes for the purposes of generating geochemical proxy datasets and to assess any ontogenetic variations in depth habitat. Our data indicate that "D." venezuelana maintains a lower thermocline depth habitat at Ceara Rise between 24 and 21 Ma. Comparing our results to published datasets we conclude that this lower thermocline depth ecology for the Oligo-Miocene is part of an Eocene-to-Pliocene evolution of depth habitat from surface to sub-thermocline for "D." venezuelana. Our size fraction data advocate the absence of photosymbionts in "D." venezuelana and suggest that juveniles calcify higher in the water column, descending into slightly deeper water during the later stages of its life cycle. Our morphotype data show that d18O and d13C variation between morphotypes is no greater than within-morphotype variability. This finding will permit future pooling of morphotypes in the generation of the "sample hungry" palaeoceanographic records.
    Keywords: 154-925A; AGE; Bolivina rhomboidalis; Catapsydrax ciperoensis; Catapsydrax ciperoensis, Magnesium/Calcium ratio; Catapsydrax ciperoensis, δ13C; Catapsydrax ciperoensis, δ18O; Catapsydrax dissimilis; Catapsydrax dissimilis, Magnesium Calcium ratio; Catapsydrax dissimilis, δ13C; Catapsydrax dissimilis, δ18O; Catapsydrax indianus; Catapsydrax indianus, δ13C; Catapsydrax indianus, δ18O; Cibicidoides mundulus; Cibicidoides mundulus, δ13C; Cibicidoides mundulus, δ18O; Dentoglobigerina venezuelana; Dentoglobigerina venezuelana, Magnesium/Calcium ratio; Dentoglobigerina venezuelana, δ13C; Dentoglobigerina venezuelana, δ18O; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Globigerina bulloides; Globigerina bulloides, Magnesium/Calcium ratio; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Globigerinoides altiapertura; Globigerinoides altiapertura, δ13C; Globigerinoides altiapertura, δ18O; Globigerinoides primordius; Globigerinoides primordius, Magnesium/Calcium ratio; Globigerinoides primordius, δ13C; Globigerinoides primordius, δ18O; Joides Resolution; Leg154; Ocean Drilling Program; ODP; Oridorsalis umbonatus; Oridorsalis umbonatus, δ13C; Oridorsalis umbonatus, δ18O; Paragloborotalia bella, Magnesium/Calcium ratio; Paragloborotalia bella, δ13C; Paragloborotalia bella, δ18O; Paragloborotalia siakensis; Paragloborotalia siakensis, Magnesium/Calcium ratio; Paragloborotalia siakensis, δ13C; Paragloborotalia siakensis, δ18O; Sample code/label; Sample ID; Size fraction; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 564 data points
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