640 Works

Mean annula temperature reconstruction for East Asia, supplement to: Peterse, Francien; Prins, Maarten Arnoud; Beets, Christiaan J; Troelstra, Simon; Zheng, Hongbo; Gu, Zhaoyan; Schouten, Stefan; Sinninghe Damsté, Jaap S (2011): Decoupled warming and monsoon precipitation in East Asia over the last deglaciation. Earth and Planetary Science Letters, 301(1-2), 256-264

Francien Peterse, Maarten Arnoud Prins, Christiaan J Beets, Simon Troelstra, Hongbo Zheng, Zhaoyan Gu, Stefan Schouten & Jaap S Sinninghe Damsté
Our understanding of the continental climate development in East Asia is mainly based on loess-paleosol; sequences and summer monsoon precipitation reconstructions based on oxygen isotopes (?18O) of stalagmites from several Chinese caves. Based on these records, it is thought that East Asian Summer Monsoon (EASM) precipitation generally follows Northern Hemisphere (NH) summer insolation. However, not much is known about the magnitude and timing of deglacial warming on the East Asian continent. In this study we...

Basic measurements of radiation from BSRN stations Cabauw, Camborne, Carpentras, Cener, Izana, Lerwick, Lindenberg, Palaiseau, Sonnblick and Toravere in the years 1995 to 2016, reference list of 445 datasets

Klaus Behrens, Emilio Cuevas-Agulló, Thierry Duprat, Martial Haeffelin, Ain Kallis, Wouter Knap, Xabier Olano, Marc Olefs & Jonathan Tamlyn
Any user who accepts the BSRN data release guidelines (http://bsrn.awi.de/data/conditions-of-data-release) may ask Amelie Driemel (mailto:Amelie.Driemel@awi.de) to obtain an account to download these datasets.

NorthGRIP firn temperature reconstruction based on water isotope firn diffusion, supplement to: Gkinis, Vasileios; Simonsen, Sebastian B; Buchardt, Susanne L; White, James W C; Vinther, Bo Møllesøe (2014): Water isotope diffusion rates from the NorthGRIP ice core for the last 16,000 years – Glaciological and paleoclimatic implications. Earth and Planetary Science Letters, 405, 132-141

Vasileios Gkinis, Sebastian B Simonsen, Susanne L Buchardt, James W C White & Bo Møllesøe Vinther
A high resolution (0.05 m) water isotopic record (d18O) is available from the NorthGRIP ice core. In this study we look into the water isotope diffusion history as estimated by the spectral characteristics of the d18O time series covering the last 16,000 years. The diffusion of water vapor in the porous medium of the firn pack attenuates the initial isotopic signal, predominantly having an impact on the high frequency components of the power spectrum. Higher...

Oligocene stable isotope record and calcareous nannofossils of IODP Site 208-1264, supplement to: Liebrand, Diederik; Raffi, Isabella; Fraguas, Ángela; Laxenaire, Rémi; Bosmans, Joyce H C; Hilgen, Frederik J; Wilson, Paul A; Batenburg, Sietske J; Beddow, Helen M; Bohaty, Steven M; Bown, Paul R; Crocker, Anya J; Huck, Claire E; Lourens, Lucas Joost; Sabia, Luciana (2018): Orbitally Forced Hyperstratification of the Oligocene South Atlantic Ocean. Paleoceanography and Paleoclimatology, 33(5), 511-529

Diederik Liebrand, Isabella Raffi, Ángela Fraguas, Rémi Laxenaire, Joyce H C Bosmans, Frederik J Hilgen, Paul A Wilson, Sietske J Batenburg, Helen M Beddow, Steven M Bohaty, Paul R Bown, Anya J Crocker, Claire E Huck, Lucas Joost Lourens & Luciana Sabia
Pelagic sediments from the subtropical South Atlantic Ocean contain geographically extensive Oligocene ooze and chalk layers that consist almost entirely of the calcareous nannofossil Braarudosphaera. Poor recovery and the lack of precise dating of these horizons in previous studies has limited our understanding of the exact number of acmes, their timing and durations, and the causes of their recurrence. Here we present a high-resolution, astronomically tuned stratigraphy of Braarudosphaera oozes (29.5-27.9 Ma) from Ocean Drilling...

Planktic and benthic boron and carbon isotopes from ODP sites 121-758, 165-999, 154-926 and 122-761, supplement to: Greenop, Rosanna; Hain, Mathis P; Sosdian, Sindia M; Oliver, Kevin I C; Goodwin, Philip; Chalk, Thomas B; Lear, Caroline H; Wilson, Paul A; Foster, Gavin L (2017): A record of Neogene seawate d11B reconstructed from paired d11B analyses on benthic and planktic foraminifera. Climate of the Past, 13(2), 149-170

Rosanna Greenop, Mathis P Hain, Sindia M Sosdian, Kevin I C Oliver, Philip Goodwin, Thomas B Chalk, Caroline H Lear, Paul A Wilson & Gavin L Foster
The boron isotope composition (d11B) of planktic foraminiferal calcite, which reflects seawater pH, is a well-established proxy for reconstructing palaeo-atmospheric CO2 and seawater carbonate chemistry. However, to translate d11B measurements determined in calcareous fossils into pH we need to know the boron isotope composition of the parent seawater (d11Bsw). While a number of d11Bsw reconstructions exist, the discrepancies between them reveals uncertainties and deficiencies that need to be addressed. Here we present a new d11Bsw...

Analysis of Fe-Mn-deposits from the ocean, supplement to: Horn, D R; Delach, M N; Horn, B M (1973): Metal content of ferromanganese deposits of the oceans. Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York, Technical Report, Office for the International Decade of Ocean Exploration, National Science Foundation, Washington, D. C. 20050 (unpublished manuscript) https://www.ngdc.noaa.gov/mgg/geology/data/multiple_platforms/0199/01995002/01995002.pdf, 3 (NSF GX-33616), 78 pp (pdf 3 MB)

D R Horn, M N Delach & B M Horn
A compilation of published and unpublished chemical analyses of samples of ferromanganese deposits from the ocean floor reveals that only in relatively few areas of the world are the copper and nickel contents sufficiently high for the nodules to represent a potential source of metals. The North and South Atlantic and Indian Oceans are characterized by deposits whose metal content (Cu, Ni, Mn and Co) are well below the minimum values necessary for economic exploitation....

Analysis of manganese deposits from the Alps, supplement to: Sabatino, Nadia; Neri, Rodolfo; Bellanca, Adriana; Jenkyns, Hugh C; Masetti, D; Scopelliti, G (2011): Petrography and high-resolution geochemical records of Lower Jurassic manganese-rich deposits from Monte Mangart, Julian Alps. Palaeogeography, Palaeoclimatology, Palaeoecology, 299(1-2), 97-109

Nadia Sabatino, Rodolfo Neri, Adriana Bellanca, Hugh C Jenkyns, D Masetti & G Scopelliti
Deposits with unusually high Mn contents sampled at Monte Mangart in the Julian Alps include organic-rich marlstone and black shale with interbedded manganoan and siliceous limestone, which were deposited during the early Toarcian Oceanic Anoxic Event. Mn enrichment during that period has been related to global sea-level change coincident with increasing subsidence rate. The formation of Fe-Mn nodules, marking a hardground at the base of the Monte Mangart section, seems to be triggered by release...

Analysis of spherules from Pacific Ocean sediments, supplement to: Friedrich, G; Schmitz-Wiechowski, A (1976): Mikroskopische und mikroanalytische Untersuchungen an metallischen Kügelchen aus Tiefseesedimenten des Zentralen Pazifik. Marine Geology, 20(3), 239-250

G Friedrich & A Schmitz-Wiechowski
Metallic spherules from Central Pacific Ocean sediments (“Valdivia” expedition VA-05/1, 1973) were studied by means of microscopy and by electron microprobe analysis. The data suggest that most of the spherules are of meteoritic origin, i.e. ablation drops from meteorites as suggested in former studies on spherules from marine environment by Schmidt and Keil (1966), Finkelmann (1970, 1972) and others. The metallic spherules contain up to about 60% Ni, 37% Fe and 3% Co. Unusually high...

Floor density and geochemistry of manganese nodules recovered for the DOMES Sites A, B and C, Pacific Ocean, supplement to: Fewkes, Ronald H; McFarland, William Douglas; Reinhart, W R (1980): Evaluation of metal resources at and near proposed deep sea mine sites. United States Bureau of Mines, Open File Report, 108-80, 242 pp

Ronald H Fewkes, William Douglas McFarland & W R Reinhart
Methods of estimating manganese nodule grade and concentration were investigated using data from a well-explored east-central Pacific manganese nodule deposit. Bulk chemical analyses of 159 nodules recovered from 21 box cores show that the range in metal values between nodules from a single box core is commonly small but may be greater than the range in mean metal content of nodules from widely separated box cores. The metal exhibiting the greatest variability in the 21...

Analysis of Mn-deposits recovered during Leg 54, supplement to: Hekinian, Roger; Rosendahl, Bruce R; Natland, James H (1980): Ocean Crust Geothermal Processes: A Perspective from the Vantage of Leg 54 Drilling. In: Rosendahl, B.R.; Hekinian, R.; et al., Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, VIV, 267-294

Roger Hekinian, Bruce R Rosendahl & James H Natland
Two distinct sedimentary facies produced by sea-floor hydrothermal activity were cored during Deep Sea Drilling Project Leg 54. The first is equivalent to the typical basal iron- and manganese-rich, clayey mud recovered at many DSDP sites. It was sampled as a dispersed component throughout the cores taken in small sediment ponds in several sites within 120 km of the East Pacific Rise at 9°N. We infer that this component was originally deposited as iron hydroxides...

Description and chemical analysis of manganese nodules from the Pacific Ocean, supplement to: Fewkes, Ronald H (1976): Electron probe microanalysis of manganese nodules. Washington State University, 71 pp

Ronald H Fewkes
Analyses of small samples extracted from different parts of a single manganese nodule have been reported by several investigators, clearly documenting the belief that a nodule is not homogeneous chemically, as a rule. The same sort of evidence has been gathered by use of the X-ray macroprobe and electron microprobe analyses. The X-ray probe work has shown clearly that chemical variations within a nodule can be correlated with optically recognizable mineral,and therefore optical study can...

Analysis of Mn-nodules from the Alps, supplement to: Bourbon, Maurice (1971): Structure et signification de quelques nodules ferrugineux, manganésifères et phosphatés liés aux lacunes de la série crétacée et paléocène briançonnaise. Comptes rendus hebdomadaires des séances de l'Académie des sciences. Série D, Sciences naturelles, 273, 2060-2062

Maurice Bourbon
The nodules from the Briançon area in the French Alps show two types of cauliflower shaped botryoidal growth. One could be diagenetic and the other purely chemical. They could also be in-situ stromatolite like in their origin but this needs to be confirmed.

Annotated record and Pb, Th, U and Ra isotope concentrations for two cores of the Atlantic and Pacific Ocean, supplement to: Kadko, David (1980): 230Th, 226Ra and 222Rn in abyssal sediments. Earth and Planetary Science Letters, 49(2), 360-380

David Kadko
A model that predicts the flux of 222Rn out of deep-sea sediment is presented. The radon is ultimately generated by 230Th which is stripped from the overlying water into the sediment. It is shown that the continental contribution of ionium is not significant, and that at low sedimentation rates, biological mixing and erosional processes strongly affect the surface concentration of the ionium. Two cores from areas of slow sediment accumulation, one from a manganese nodule...

Analysis of Mn-deposits from the Pacific, supplement to: Piper, David Z (1974): Rare earth elements in ferromanganese nodules and other marine phases. Geochimica et Cosmochimica Acta, 38(7), 1007-1022

David Z Piper
The concentrations of rare-earth elements (REE) have been measured in 31 ferromanganese nodules from the Pacific and Indian Oceans and vary by almost a factor of 5. Too few nodules have been analyzed to define possible regional trends. The shale-normalized patterns, however, permit division of nodules into two groups: those from depth greater than 3000–3500 m and those from less depth. The factors that determine this change in the relative concentration of REE may be...

Geochemistry on sediments from Baja California, supplement to: Shimmield, Graham; Price, N B (1986): The behaviour of molybdenum and manganese during early sediment diagenesis ? offshore Baja California, Mexico. Marine Chemistry, 19(3), 261-280

Graham Shimmield & N B Price
Pelagic sediment recovered at DOMES Site A in the equatorial North Pacific (151°W, 9° 15'N) consists of a surface homogeneous layer, approximately 10 cm thick, overlying a strongly mottled layer that is lighter in color. The radiolarian composition of both units is Quaternary. In areas where this sediment was only a few centimeters thick, the underlying sediment was early Tertiary. Clay mineralogy and major oxide composition of the two Quaternary sediments are uniform. Their similarity...

Registration Year

  • 2017
    640

Resource Types

  • Collection
    640