The Messinian Sicilian stratigraphy revisited: new insights for the Messinian salinity crisis   总被引：1，自引：0，他引：1  

Marco Roveri  Stefano Lugli  Vinicio Manzi  B. Charlotte Schreiber 《地学学报》2008,20(6):483-488

Controversies around the Messinian salinity crisis (MSC) are because of the difficulties in establishing genetic and stratigraphic relationships between its deep and shallow‐water record. Actually, the Sicilian foreland basin shows both shallow and deep‐water Messinian records, thus offering the chance to reconstruct comprehensive MSC scenarios. The Lower Gypsum of Sicily comprises primary and resedimented evaporites separated in space and time by the intra‐Messinian unconformity. A composite unit including halite, resedimented gypsum and Calcare di Base accumulated between 5.6 and 5.55 Ma in the main depocentres; it records the acme of the Messinian Salinity Crisis during a tectonic phase coupled with sea‐level falls at glacials TG14‐TG12. These deposits fully post‐date primary gypsum, which precipitated in shallow‐water wedge‐top and foreland ramp basins between 5.96 and 5.6 Ma. This new stratigraphic framework results in a three‐stage MSC scenario characterized by different primary evaporite associations: selenite in the first and third stages, carbonate, halite and potash salt in the second one associated with hybrid resedimented evaporites.  相似文献   

Modern swathe sounding and sub-bottom profiling technology for research applications: The Atlas Hydrosweep and Parasound Systems     

J. A. Grant  R. Schreiber 《Marine Geophysical Researches》1990,12(1-2):9-19

This chapter describes two separate but complementary research echosounder systems originally developed by Krupp Atlas Elektronik GmbH for the new German oceanographic research vessel Meteor.The Hydrosweep is a Hydrographic wide-swathe sweep survey echosounder for both shallow and deep water applications providing accurate bathymetric surveys and terrain-following navigation capabilities.The Parasound system is a hull-mounted dual channel parametric narrow-beam deep sea survey and sub-bottom profiling echosounder enabling particularly high vertical and horizontal resolution of seabed features.  相似文献   

Spectral-element simulations of global seismic wave propagation—II. Three-dimensional models, oceans, rotation and self-gravitation     

Dimitri Komatitsch  Jeroen Tromp 《Geophysical Journal International》2002,150(1):303-318

  相似文献   

Tensorial formulation of the wave equation for modelling curved interfaces   总被引：1，自引：0，他引：1  

Dimitri Komatitsch  Fabien Coutel  Peter Mora 《Geophysical Journal International》1996,127(1):156-168

  相似文献   

Mauer – the type site of Homo heidelbergensis: palaeoenvironment and age     

Günther A. Wagner  Lutz Christian Maul  Manfred Löscher  H. Dieter Schreiber 《Quaternary Science Reviews》2011,30(11-12):1464-1473

The mandible of Homo heidelbergensis was found 1907 in the sand pit Grafenrain at Mauer in coarse fluvial sands 24 m below the surface, deposited in a former course of the Neckar River. These ‘Mauer sands’ are overlain by a series of glacial-climate loess deposits with intercalated interglacial palaeosols, which can be correlated with Quaternary climate history, thus indicating an early Middle Pleistocene age for H. heidelbergensis. The ‘Mauer sands’ are famous for their rather rich mammal fauna, which clearly indicates interglacial climate conditions. The faunal evidence – in particular the micromammals – place the ‘Mauer sands’ into MIS 15 or MIS 13 although most stratigraphic arguments favour correlation to MIS 15 and therefore to an age of ca 600 ka.  相似文献   

Risk Assessment of Soil Compaction in the Walloon Region in Belgium   总被引：1，自引：0，他引：1  

Dimitri D’Or  Marie-France Destain 《Mathematical Geosciences》2016,48(1):89-103

  相似文献   

Two decades of system-based hygienic–microbiological research in Swist river catchment (Germany)     

Christiane Schreiber  Andrea Rechenburg  Christoph Koch  Ekkehard Christoffels  Thomas Claßen  Marlene Willkomm  Franz Michael Mertens  Andrea Brunsch  Susanne Herbst  Esther Rind  Thomas Kistemann 《Environmental Earth Sciences》2016,75(21):1393

  相似文献   

The Mediterranean was a desert. A voyage of the Glomar Challenger: Kenneth J. Hsü, Princeton University Press, 1983, 197 p., $17.95     

B. Charlotte Schreiber 《Geochimica et cosmochimica acta》1984,48(3):601

  相似文献   

Uniform half-plane elastodynamic problems by an approximate boundary element method     

Dionyssia-Pinelopi N. Kontoni  Dimitri E. Beskos 《Soil Dynamics and Earthquake Engineering》1987,6(4):227-238

In this paper the applicability of an approximate Boundary Element Method to uniform half-plane elastodynamic problems is investigated. This method employs the concept of images to construct approximate fundamental solutions for the half-plane and does not require any half-plane surface discretization. The method is formulated in the frequency domain for the case of harmonic disturbances or the Laplace transform domain for the case of transient disturbances. In the latter case a numerical inversion of the transformed solution is necessary to obtain the time domain response. The proposed method can be used as an alternative to boundary element methods that either utilize the infinite plane fundamental solution and thus require a half-plane surface discretization, or employ the exact half-plane fundamental solution, which even though leads to no surface discretization, is of a very lengthy and complicated form. Two characteristics numerical examples are used to illustrate the proposed method and study its advantages and disadvantages.  相似文献   

Iron metal production in silicate melts through the direct reduction of Fe(II) by Ti(III), Cr(II), and Eu(II)     

Henry D. Schreiber  G.Bryan Balazs  Andrew P. Shaffer  P.Lynne Jamison 《Geochimica et cosmochimica acta》1982,46(10):1891-1901

The production of metallic iron in silicate melts by the chemical reactions, 2Ti³⁺_(melt) + Fe²⁺_(melt) → 2Ti⁴⁺_(melt) + Fe⁰_(crystal)2Cr²⁺_(melt) + Fe²⁺_(melt) → 2Cr³⁺_(melt) + Fe⁰_(crystal)2Eu²⁺_(melt)+ Fe²⁺_(melt) → 2Eu³⁺_(melt) + Fe⁰_(crystal) has been demonstrated under experimental conditions in a simplified basaltic liquid, Such reactions may occur in lunar basalts and other reduced systems, and, thus, may aid in the understanding of the reduced nature of lunar basalts. The reactions were studied in a glass-forming Na-Ca-Mg-Al-silicate composition at a melt temperature of 1250°C and an imposed oxygen fugacity at the C/CO buffer (1 atm total pressure). Microtitrations of individually-doped samples were used in the quantitative assessment of their redox ratios and for the calibration of visible and near-infrared spectral absorptions. These spectral absorptions were then applied to the evaluation of the mutual redox interactions in dual-doped samples.  相似文献