Gas Chromatography-Mass Spectrometry in Geochemical Investigation of Organic Matter of the Grodziec Beds (Upper Carboniferous), Upper Silesian Coal Basin, Poland     

Monika J. Fabianńska  Gra?yna Bzowska  Aniela Matuszewska  Maria Racka  Urszula Skr?t 《Chemie der Erde / Geochemistry》2003,63(1):63-91

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Historical seismicity in Central Switzerland     

Monika Gisler  Donat Fäh  Philipp Kästli 《Eclogae Geologicae Helvetiae》2004,97(2):221-236

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Crustal features of some main suture zones along the European Geotraverse     

Monika E. Huch 《International Journal of Earth Sciences》1988,77(3):777-786

The European Geotraverse (EGT) crosses along a 4000 km profile from the North Cape to Tunisia the following main suture zones:

the Tornquist-Teisseyre zone between the Baltic Shield and the Variscan realm,

the transition zones between Rhenohercynian and Saxothuringian as well as between Saxothuringian and Moldanubian zones in the Variscan part of central Europe, and

the collision zone between the European continent and the Adriatic microplate.

Some structural aspects of these suture zones are described.  相似文献   

Stability of Titanium Dioxide Nanoparticle Agglomerates in Transitional Waters and Their Effects Towards Plankton from Lagoon of Venice (Italy)     

Clémentine Perstrimaux  Séverine Le Faucheur  Monika Mortimer  Serge Stoll  Fabrizio Bernardi Aubry  Margherita Botter  Roberto Zonta  Vera I. Slaveykova 《Aquatic Geochemistry》2015,21(2-4):343-362

The present study explores the effect of salinity and dissolved organic carbon (DOC) gradients on the stability and reactivity of titanium dioxide nanoparticle (TiO₂-NP) agglomerates in ambient water from the Lagoon of Venice and their possible effect on nauplii sampled at the same locations. In all ambient water samples, TiO₂-NPs formed rapidly micrometre-sized agglomerates. The increase in the salinity and concomitant decrease in DOC content induced the formation of larger agglomerates, with z-average hydrodynamic diameter increasing with TiO₂-NP concentration and exposure duration. Under the studied conditions, ζ-potential exhibited negative values. In line with agglomeration results, enhancement of the salinity and lower DOC resulted in less negative ζ-potential with close to 0 values in the dispersions of 100 mg L^?1 TiO₂-NPs in sea water. Two-hour exposure to micrometre-sized agglomerates of TiO₂-NPs resulted in an increase in the fluorescence of propidium iodide (PI) stained nauplii in comparison with unexposed controls, but had no effect at 24-h exposure. The increase in nauplii-associated PI fluorescence was more noticeable in dispersions containing 100 mg L^?1 than those containing 10 mg L^?1 TiO₂-NPs, suggesting membrane permeability alteration in a concentration-dependent manner. However, the PI staining results have to be interpreted with caution because of the possible dye binding to the nauplii surface without penetration of cellular membrane. The effect of TiO₂-NPs on nauplii was more pronounced at higher salinity and decreased with increasing DOC concentrations at 2 h, while no trends were found at 24-h exposure, as well as exposure to 100 mg L^?1 TiO₂-NPs.  相似文献   

Modelling of 2016 Kumamoto earthquake by integrating site effect in semi-empirical technique     

Devi  Sonia  Sandeep  Kumar  Parveen  Monika  Joshi  A. 《Natural Hazards》2022,111(2):1931-1950

Natural Hazards - The 2016 Kumamoto earthquake (MJMA7.3) struck central area of Kyushu Island, Japan. The presence of near surface low velocity layer greatly amplified the ground motions and caused...  相似文献   

Determination of volatile concentrations in fluorapatite of Martian shergottite NWA 2975 by combining synchrotron FTIR,Raman spectroscopy,EMPA, and TEM,and inferences on the volatile budget of the apatite host‐magma          下载免费PDF全文

Ewa Słaby  Monika Koch‐Müller  Hans‐Jürgen Förster  Richard Wirth  Dieter Rhede  Anja Schreiber  Ulrich Schade 《Meteoritics & planetary science》2016,51(2):390-406

We combined the focused ion beam sample preparation technique with polarized synchrotron‐based FTIR (Fourier transform infrared) spectroscopy, laser‐Raman spectroscopy, electron microprobe analysis (EMPA), and transmission electron microscope (TEM) analysis to identify and quantify structurally bound OH, F, Cl, and CO₃ groups in fluorapatite from the Northwest Africa 2975 (NWA 2975) shergottite. In this study, the first FTIR spectra of the OH‐stretching region from a Martian apatite are presented that show characteristic OH‐bands of a F‐rich, hydroxyl‐bearing apatite. Depending on the method of apatite‐formula calculation and whether charge balance is assumed or not, the FTIR‐based quantification of the incorporated OH, expressed as wt% H₂O, is in variably good agreement with the H₂O concentration calculated from electron microprobe data. EMP analyses yielded between 0.35 and 0.54 wt% H₂O, and IR data yielded an average H₂O content of 0.31 ± 0.03 wt%, consistent with the lower range determined from EMP analyses. The TEM observations implied that the volatiles budget of fluorapatite is magmatic. The water content and the relative volatile ratios calculated for the NWA 2975 magma are similar to those established for other enriched or intermediate shergottites. It is difficult to define the source of enrichment: either Martian wet mantle or crustal assimilation. Comparing the environment of parental magma generation for NWA 2975 with the terrestrial mantle in terms of water content, it displays a composition intermediate between enriched and depleted MORB.  相似文献   

An automated full waveform logging system for high-resolution P-wave profiles in marine sediments     

Monika Breitzke  Volkhard Spieβ 《Marine Geophysical Researches》1993,15(4):297-321

An automated, PC-based logging system has been developed to investigate marine sediment cores by full waveform transmission seismograms. High-resolution P-wave velocity and amplitude attenuation profiles are simultaneously derived from the transmission data to characterize the acoustic properties of the sediment column.A pair of ultrasonic, piezoelectric wheel probes is used to generate and record the transmission signals travelling radially through the sediment core. Both unsplit and split cores are allowed. Mounted in a carriage driven by a stepping motor via a shaft the probes automatically move along the core liner, stopping at equidistant spacings to provide a quasi-continuous inspection of the core by the transmission data. The axial travel distance and the core diameter are determined by digital measuring tools.First arrivals are picked automatically from the transmission seismograms using either a threshold in the seismogram's envelope or a cross-correlation algorithm taking the zero-offset signal of both wheel probes into account. Combined with the core diameter these first arrivals lead to a P-wave velocity profile with a relative precision of 1 to 2 m s^–1. Simultaneously, the maximum peak-to-peak amplitudes of the transmission seismograms are evaluated to get a first idea on the amplitude attenuation along the sediment core.Two examples of gravity cores taken during a recent cruise of R.V. METEOR in the Western Equatorial Atlantic are presented. They yield that the P-wave profiles can be used for locating strong and fine-scale lithological changes, e.g. turbidite layers and slight variations in the sand, silt or clay content. In addition, the transmission seismograms and their amplitude spectra obviously seem to reveal a correlation between the relative amount of low-frequency spectral components and the sediment grain size, and thus provide a tool for the determination of additional, related physical or sedimentological parameters in future investigations.  相似文献   

17th International Cartographic Conference 10th General Assembly of ICA     

Frauke Heinzle  Karl-Heinrich Anders  Monika Sester 《GeoJournal》1994,34(2):234-234

Reports

17th International Cartographic Conference 10th General Assembly of ICA  相似文献   

EPMA and PIXE dating of monazite in granulites from Stary Gierałtów, NE Bohemian Massif, Poland     

Monika A. Kusiak  Kazuhiro Suzuki  Daniel J. Dunkley  Janusz Lekki  Nonna Bakun-Czubarow  Mariusz Paszkowski  Bartosz Budzy&#x; 《Gondwana Research》2008,14(4):675

Chemical Th–U–total Pb (CHIME) dating of monazite by electron probe microanalyzer (EPMA) and proton microprobe (PIXE) was carried out on felsic granulites from Stary Gierałtów, Poland, which represent part of the Orlica-Śnieżnik Dome in the NE Bohemian Massif. Analyzed monazite is characterized by mosaic zoning rather than simple core-to-rim growth, and strontium contents of up to 750ppm. An isochron age of 347 ± 13Ma represents timing of amphibolite-facies metamorphism, in agreement with previously published estimates.  相似文献   

Comparison of the microbial community composition of pristine rock cores and technical influenced well fluids from the Ketzin pilot site for CO<Subscript>2</Subscript> storage     

Linda Pellizzari  Daria Morozova  Dominik Neumann  Monika Kasina  Stefan Klapperer  Michael Zettlitzer  Hilke Würdemann 《Environmental Earth Sciences》2016,75(19):1323

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