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  • 1
    Call number: ZSP 16697-0009
    Pages: 105 S. : Abb. ; 30 cm
    ISSN: 0931-0800
    Series Statement: Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen 80
    Branch Library: AWI Library
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  • 2
    Call number: PIK N 613-91-0160
    Type of Medium: Monograph available for loan
    Pages: 308 pp.
    ISBN: 9022008096
    Series Statement: Simulation Monographs ;
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 3
    Monograph available for loan
    Monograph available for loan
    Beijing : Science Press
    Call number: M 98.0450
    Type of Medium: Monograph available for loan
    Pages: vii, 159 S.
    ISBN: 7030050447
    Series Statement: Solid earth sciences research in China
    Classification:
    Regional Geology
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 4
    Monograph available for loan
    Monograph available for loan
    Suhrkamp : Frankfurt am Main
    Call number: PIK E 703-00-0427
    Type of Medium: Monograph available for loan
    Pages: 148 p.
    Edition: 3. Auflage
    ISBN: 3518107696
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 5
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We employ data taken by the JADE and OPAL experiments for an integrated QCD study in hadronic e $^+$ e $^-$ annihilations at c.m.s. energies ranging from 35 GeV through 189 GeV. The study is based on jet-multiplicity related observables. The observables are obtained to high jet resolution scales with the JADE, Durham, Cambridge and cone jet finders, and compared with the predictions of various QCD and Monte Carlo models. The strong coupling strength, $\alpha_s$ , is determined at each energy by fits of ${\cal O}(\alpha_s^2)$ calculations, as well as matched ${\cal O}(\alpha_s^2)$ and NLLA predictions, to the data. Matching schemes are compared, and the dependence of the results on the choice of the renormalization scale is investigated. The combination of the results using matched predictions gives \[\alpha_s(M_{Z^0})=0.1187^{0.0034}_{0.0019}.\] The strong coupling is also obtained, at lower precision, from ${\cal O}(\alpha_s^2)$ fits of the c.m.s. energy evolution of some of the observables. A qualitative comparison is made between the data and a recent MLLA prediction for mean jet multiplicities.
    Type of Medium: Electronic Resource
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  • 6
    Publication Date: 2019
    Description: 〈span〉〈div〉Abstract〈/div〉A few, thin, Mississippian siliciclastic limestone beds, interbedded with ammonoid (uppermost 〈span〉Eumorphoceras〈/span〉 Zone)-bearing shales within the South Syncline Ridge section on the Nuclear Test Site in southern Nevada, contain an abundant, low-diversity assemblage of late Serpukhovian/late Chesterian calcareous foraminifers dominated by the archaediscaceans 〈span〉Neoarchaediscus altiluminis〈/span〉, 〈span〉Brenckleina rugosa〈/span〉, 〈span〉Eosigmoilina robertsoni〈/span〉, and 〈span〉Betpakodiscus〈/span〉 of the group 〈span〉B〈/span〉. 〈span〉attenuatus〈/span〉. These limestone beds were deposited in a shallow-water, clastic facies of the Scotty Wash Formation and, based on common conodont occurrences, correlate southeast to the Bird Spring Formation below the Mississippian-Pennsylvanian GSSP at Arrow Canyon, Nevada. The South Syncline Ridge foraminifers are comparable to those found in coeval beds at Arrow Canyon and represent the only other known foraminiferal assemblage to exist in association with uppermost 〈span〉Eumorphoceras〈/span〉 Zone ammonoids in North America outside of Arkansas in the southern Midcontinent. Reconciliation of regional conodont and ammonoid zonations shows that the range of eosigmoiline foraminifers (〈span〉E〈/span〉. 〈span〉robertsoni〈/span〉 and 〈span〉B〈/span〉. 〈span〉rugosa〈/span〉), now generally considered an upper Serpukhovian index, extends from a position either just below or at the lower-upper boundary of the Serpukhovian Stage into the lower part of the Bashkirian Stage in North America; their upper range falls within the lower part of the 〈span〉Homoceras〈/span〉 ammonoid zone beginning in the upper part of the Serpukhovian Stage. Discussion of the foraminiferal taxa includes support for retaining the genus 〈span〉Betpakodiscus〈/span〉 rather than synonymizing it under 〈span〉Tubispirodiscus〈/span〉, as proposed by some specialists during the past few years.〈/span〉
    Print ISSN: 0096-1191
    Electronic ISSN: 1943-264X
    Topics: Geosciences
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  • 7
    Publication Date: 2019
    Description: 〈span〉〈div〉Abstract〈/div〉Pyrite (FeS〈sub〉2〈/sub〉) is a typical container of Pt in ores of magmatic and hydrothermal origin and in some carbonrich ores of sedimentary-diagenetic origin. Knowledge of the state of Pt disseminated in the matrix of pyrite, including local atomic environment (type of atoms in the nearest and distant coordination shells, coordination numbers, interatomic distances) and oxidation state, is necessary for physical-chemical modeling of platinum group element mineralization and for the improvement of Pt ore extraction and processing technologies. Here we report results of an investigation of local atomic structure of synthetic Pt-bearing pyrites by means of X-ray absorption spectroscopy (XAS). Synthesis experiments, performed at 580° and 590°C in a Pt-saturated system by means of salt-flux method, yielded crystals of pyrite with concentrations of Pt up to 4 wt %. Scanning electron microscopy (SEM) and electron probe microanalysis (EPMA) showed that the distribution of Pt within the pyrite grains is of zonal character, but within the distinct zones Pt is distributed homogeneously. Negative correlation between the concentrations of Pt and Fe was observed in the synthesized pyrite grains. The slope of the correlation line corresponds to the formation of the solid solution in the Pt-Fe-S system and/or to the formation of PtS〈sub〉2〈/sub〉. The XAS experiments revealed the existence of two forms of Pt in pyrite. The main form is the solid solution Pt(IV), which isomorphically substitutes for Fe. The Pt-S distance in pyrite is ~0.1 Å longer than that of Fe-S in pure pyrite. The distortion of the pyrite crystal structure disappears at 〈span〉R〈/span〉 〉2.5 Å. The second Pt-rich form was identified by means of high-resolution transmission electron microscopy (HRTEM) as nanosized inclusions of PtS〈sub〉2〈/sub〉. Heating experiments with in situ registration of X-ray absorption spectra resulted in partial decomposition (dissolution) of PtS〈sub〉2〈/sub〉 nanosized inclusions with the formation of the solid solution (Fe〈sub〉1–x〈/sub〉Pt〈sub〉x〈/sub〉)S〈sub〉2〈/sub〉. Therefore, the PtS〈sub〉2〈/sub〉 nanosized particles can be considered as a quench product. Our data demonstrate that both Pt solid solution and PtS〈sub〉2〈/sub〉 nanosized inclusions (at high Pt content) can exist in natural Pt-bearing pyrites.〈/span〉
    Print ISSN: 0361-0128
    Electronic ISSN: 1554-0774
    Topics: Geosciences
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  • 8
    Publication Date: 2000-10-01
    Print ISSN: 1434-6044
    Electronic ISSN: 1434-6052
    Topics: Physics
    Published by Springer
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  • 9
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    PANGAEA
    In:  Supplement to: Lisitzina, Nadezhda A; Butuzova, Galina Yu; Volkov, Igor I; et al. (1979): Lithology and Geochemistry of Pacific Sediments (Transpacific Profile). Geological Institute of the Russian Academy of Sciences, Transactions, vol. 334. Moscow, Nauka Publ. (V.N. Kholodov, Ed.), 263 pp
    Publication Date: 2023-05-12
    Description: The book is devoted to comprehensive study of composition of sediments from the North Pacific Ocean. The sediments have been divided characterized by their lithologic and facial types, grain size composition and mineralogy. Influence of volcanism on formation of mineral and chemical composition of these sediments has been shown. Regularities of distribution of sediment accumulation rates and of a number of chemical elements on the Transpacific profile have been found. Determining role of mechanical fractionation in their localization has been shown.
    Keywords: Archive of Ocean Data; ARCOD; DM9; DM9-611; DM9-612; DM9-613; DM9-615; DM9-625; DM9-626; DM9-627; DM9-628; DM9-629; DM9-641; DM9-643; DM9-645; DM9-647; DM9-649; DM9-651; DM9-653; DM9-655; DM9-668; DM9-669; DM9-670; DM9-671; DM9-672; DM9-673; DM9-674; DM9-675; DM9-677; DM9-678; DM9-685; DM9-686; Dmitry Mendeleev; GC; Grab; GRAB; Gravity corer; MULT; Multiple investigations; Northeast Pacific; North Pacific; Northwest Pacific; OKEAN; Okean Grab; PC; Piston corer; VITYAZ; Vityaz (ex-Mars); Vityaz-29; VITYAZ3625-GC; VITYAZ3784-GC; VITYAZ4285-GR-2; VITYAZ4331-GR-2; VITYAZ4362-GR-2; VITYAZ6158-GC; VITYAZ6159-GC; VITYAZ6160-PC; VITYAZ6161-PC; VITYAZ6162-GC; VITYAZ6163-GC; VITYAZ6164-GC; VITYAZ6165-GR-2; VITYAZ6166-GC; VITYAZ6167-GC; VITYAZ6168-GC; VITYAZ6169-GC; VITYAZ6171-GC; VITYAZ6172-GC; VITYAZ6173-GC; VITYAZ6174-PC; VITYAZ6175-GC; VITYAZ6176-GC
    Type: Dataset
    Format: application/zip, 6 datasets
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  • 10
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    PANGAEA
    In:  Supplement to: Hayes, Daniel R; et al. (in prep.): Physical oceanography of the Eastern Basin of the Mediterranean Sea from 2009 to 2016 as observed from autonomous underwater gliders: data set description. Earth System Science Data Discussions
    Publication Date: 2023-05-12
    Description: In 2008, the Oceanography Center at the University of Cyprus acquired two underwater gliders in the framework of a nationally-managed infrastructure upgrade program. The gliders were purchased from the Seaglider Fabrication Center at the University of Washington. Both gliders are rated to 1000 m and carry a typical sensor payload: non-pumped conductivity-temperature-depth sensors (CTD), a dissolved oxygen sensor, an optical triplet to measure optical backscatter at 400 nm, 700 nm, and chlorophyll-a fluorescence. Since March of 2009, the gliders have been used in a long-term observing program of the Cypriot EEZ, and by September 2015, have covered more than 15300 km over ground and 3500 dive cycles in 940 glider days. Butterfly patterns have been flown in two configurations, either on the western or eastern side of the EEZ south of Cyprus. The glider endurance lines criss-cross the region in order to more accurately locate and investigate the mesoscale structures south of Cyprus, and in particular the Cyprus eddy which is often the dominant feature. Based on the near real time observations, the glider mission was sometimes altered in order to more fully sample the Cyprus eddy, or to locate its center or extent. A summary of the raw and processed data collected, and the quality control procedures are presented, in order for future users to take advantage of this unique data set.
    Type: Dataset
    Format: application/zip, 18 datasets
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