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  • 1
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    Making a Better Magnetic Map (2019)
    Details
    Publication Date: 2020-11-11
    Description: A new version of the World Digital Magnetic Anomaly Map, released last summer, gives greater insight into the structure and history of Earth's crust and upper mantle.
    Description: Published
    Description: 1A. Geomagnetismo e Paleomagnetismo
    Description: N/A or not JCR
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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    PAPER (OA)
  • 2
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    (Table DR1) Trace element contents in basalts from ODP Hole 33-317A
    PANGAEA
    In:  Supplement to: Ingle, Stephanie; Mahoney, John J; Sato, Hiroshi; Coffin, Millard F; Kimura, Jun-Ichi; Hirano, Naoto; Nakanishi, Masao (2007): Depleted mantle wedge and sediment fingerprint in unusual basalts from the Manihiki Plateau, central Pacific Ocean. Geology 2007 35(7), 35(7), 595-598, https://doi.org/10.1130/G23741A.1
    Details
    Publication Date: 2023-06-27
    Description: Numerous large igneous provinces formed in the Pacific Ocean during Early Cretaceous time, but their origins and relations are poorly understood. We present new geochronological and geochemical data on rocks from the Manihiki Plateau and compare these results to those for other Cretaceous Pacific plateaus. A dredged Manihiki basalt gives an 40Ar-39Ar age of 117.9+/-3.5 Ma (2 sigma), essentially contemporaneous with the Ontong Java Plateau ~2500 km to the west, and the possibly related Hikurangi Plateau ~3000 km to the south. Drilled Manihiki lavas are tholeiitic with incompatible trace element abundances similar to those of Ontong Java basalts. These lavas may result from high degrees of partial melting during the main eruptive phase of plateau formation. There are two categories of dredged lavas from the Danger Islands Troughs, which bisect the plateau. The first is alkalic lavas having strong enrichments in light rare earth and large-ion lithophile elements; these lavas may represent late-stage activity, as one sample yields an 40Ar-39Ar age of 99.5+/-0.7 Ma. The second category consists of tholeiitic basalts with U-shaped incompatible element patterns and unusually low abundances of several elements; these basalts record a mantle component not previously observed in Manihiki, Ontong Java, or Hikurangi lavas. Their trace element characteristics may result from extensive melting of depleted mantle wedge material mixed with small amounts of volcaniclastic sediment. We are unaware of comparable basalts elsewhere.
    Keywords: 33-317A; Barium; Caesium; Cerium; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Dysprosium; Erbium; Europium; Gadolinium; Glomar Challenger; Hafnium; Holmium; Lanthanum; Leg33; Lutetium; Neodymium; Niobium; Praseodymium; Rubidium; Samarium; Sample code/label; South Pacific/PLATEAU; Strontium; Terbium; Thermal-ionization multicollector mass spectrometer VG Sector; Thorium; Thulium; Uranium; Ytterbium; Yttrium; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 100 data points
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    DATA PANGAEA
  • 3
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    Magnetic anomaly map of Ori Massif and its implications for oceanic plateau formation (2018)
    Elsevier
    In:  Earth and Planetary Science Letters, 501 . pp. 46-55.
    Details
    Publication Date: 2021-02-08
    Description: Many oceanic plateaus have been emplaced at or adjacent to mid-ocean ridges. To explain plateau volume and thickened crust compared to normal oceanic crust, hotspot–ridge interaction is commonly assumed, but the manner of interaction remains unclear. The Shatsky Rise oceanic plateau is a large volcanic mountain that formed at a triple junction during Late Jurassic and Early Cretaceous time. Recent drilling and seismic investigations suggest that the intermediate edifice in the rise, Ori Massif, is a central volcano. Paradoxically, magnetic lineations were traced across parts of Ori Massif, implying formation at a spreading ridge. In this study, we examined magnetic anomalies over and around Ori Massif to obtain insights about the formation of this volcanic edifice. Magnetic data from 21 cruises were corrected, combined, and gridded to construct a magnetic anomaly map. Forward and inverse magnetic modeling was done to investigate the magnetic structure of Ori Massif. The results imply that this large volcanic edifice is predominantly characterized by linear magnetic anomalies resulting from alternating normal and reversed polarity magnetization blocks, analogous to magnetic anomalies recorded by spreading-ridges. This magnetic structure is not expected for a central volcano that was built by long runout lava flows, implying that Ori Massif eruptions must have been constrained near the ridge axis. Magnetic bights on the north and south boundaries of Ori Massif imply that it was bracketed by triple junctions, indicating complex ridge tectonics during the formation of Shatsky Rise. The surprising finding that Ori Massif is traversed by coherent linear magnetic anomalies indicates that oceanic plateaus can record seafloor spreading magnetic anomalies despite large crustal thickness. Other oceanic plateaus also record linear magnetic anomalies, implying a link between divergent plate boundaries and oceanic plateau volcanism.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.epsl.2018.08.029
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Bending-Related Topographic Structures of the Subducting Plate in the Northwestern Pacific Ocean (2011)
    Springer
    In:  In: Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin. , ed. by Ogawa, Y., Anma, R. and Dilek, Y. Modern Approaches in Solid Earth Sciences, 8 . Springer, Dordrecht, pp. 1-38. ISBN 978-90-481-8885-7
    Details
    Publication Date: 2019-09-24
    Description: Elongated topographic structures associated with bending of the ­subducting oceanic plate along the western Kuril, Japan and northern ­Izu-Ogasawara trenches, were investigated using available multibeam bathymetric data. Magnetic anomaly lineations were also reidentified using available geomagnetic data to reveal controlling factors for strikes of bending-related topographic structures. The new bathymetric map demonstrates that most of bending-related topographic structures exist in the oceanward trench slopes deeper than 5,600 m. The map reveals that bending-related topographic structures are developed parallel to the trench axis or inherited seafloor spreading fabrics. Detailed identification of magnetic anomalies reveals curved lineations and discontinuity of lineations associated with ­propagation ridges. A trough with elongated escarpments associated with the propagating ridge in mid-Cretaceous Quiet Period was discovered near the trench-trench-trench triple junction. Comparison between the detailed bathymetric and magnetic anomaly lineation maps elucidates that abyssal hill fabrics were reactivated where the angle between abyssal hill fabrics and trench axis is less than about 30°. The topographic expression of bending-related structures are classified into two types according to whether new faults develop parallel to the trench axis or inherited seafloor spreading fabrics reactivate.
    Type: Book chapter , NonPeerReviewed
    Format: text
    DOI: 10.1007/978-90-481-8885-7_1
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    OceanRep: Book chapter
  • 5
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    Ultrafast optical control of group delay of narrow-band terahertz waves (2014)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2014-03-12
    Description: We experimentally demonstrate control over the group delay of narrow-band (quasi continuous wave) terahertz (THz) pulses with constant amplitude based on optical switching of a metasurface characteristic. The near-field coupling between resonant modes of a complementary split ring resonator pair and a rectangular slit show an electromagnetically induced transparency-like (EIT-like) spectral shape in the reflection spectrum of a metasurface. This coupling induces group delay of a narrow-band THz pulse around the resonant frequency of the EIT-like spectrum. By irradiating the metasurface with an optical excitation pulse, the metasurface becomes mirror-like and thus the incident narrow-band THz pulse is reflected without a delay. Remarkably, if we select the appropriate excitation power, only the group delay of the narrow-band THz pulse can be switched while the amplitude is maintained before and after optical excitation. Scientific Reports 4 doi: 10.1038/srep04346
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Nature Publishing Group (NPG)
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    PAPER CURRENT
  • 6
    Electronic Resource
    Electronic Resource
    Magnetic anomaly lineations from Late Jurassic to Early Cretaceous in the west-central Pacific Ocean (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 109 (1992), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Late Jurassic to Early Cretaceous (Mesozoic) magnetic anomaly lineations (the Phoenix, Magellan, Mid-Pacific Mountains, Hawaiian and Japanese lineation sets) with fracture zones in the west-central Pacific Ocean were identified more comprehensively than in any previous studies. We fixed 2100 positions of identified magnetic anomalies based on magnetic data of 283 cruise tracks. Two remarkable fracture zones, the Phoenix and Central Pacific Fracture Zones, were mapped and newly named. Our newly identified lineations from M10N to M0 around the Mid-Pacific Mountains, which belong to the Hawaiian lineation set, illustrated that the sea-floor south of the Mid-Pacific Mountains has the same age as that of the north (132–118 Ma). Our analysis of skewness parameters revealed that the older part of the Phoenix set (M17–M29) has skewness different from that of the younger part (M1-M14), implying an effect of magnetic overprints by the Cretaceous volcanism. It was confirmed that the spreading rate of the Mesozoic Pacific spreading system was the fastest in the world in the Mesozoic. A drastic change in spreading rates occurred simultaneously at the period between chrons M21 and M20 (149.5–148.5 Ma) in all the Mesozoic Pacific spreading systems. The event appears to be synchronous with events in other oceans such as the Mesozoic Atlantic and Indian Oceans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1992.tb00126.x
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    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Typus melancholicus in light of the five-factor model of personality (1998)
    Springer
    European archives of psychiatry and clinical neuroscience 248 (1998), S. 64-69 
    Details
    ISSN: 1433-8491
    Keywords: Key words Typus melancholicus ; Five-factor model of personality ; Premorbid personality ; Relatives rating
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The present paper examines Typus melancholicus (TM), which is widely accepted as premorbid personality of depression in Germany and Japan, from the viewpoint of the five-factor model of personality, which has recently been gaining international popularity as the comprehensive model of personality traits. Two measures of TM, von Zerssen’s F-list and Kasahara’s scale, as well as the personality questionnaire for the five-factor model, NEO Five Factor Inventory, were completed for 140 consecutive psychiatric outpatients by their close relatives. It was found that (a) the two measures of TM had good internal consistency reliability, (b) they had reasonable concurrent validity, and (c) TM was characterized by high Conscientiousness, high Agreeableness and, to a lesser degree, high Extraversion. The results were largely in agreement with theoretical prediction and provide further support to the construct validity of the TM measures. Whether combining the three personality traits into one type is meaningful in depicting a particular premorbid personality constellation awaits further empirical examination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004060050019
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    Paper (German National Licenses)
    Fulltext
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