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81.
Eugen?SeiboldEmail author Ilse?Seibold J?rn?Thiede 《International Journal of Earth Sciences》2004,93(4):645-651
Abstrakt Durch Vermittlung von Jörn Thiede gelangte das Geologenarchiv in den Besitz eines Videobands von einem Fernsehinterview mit Rosenqvist (auch gelegentlich Rosenquist), das Elen Roaldset (E.R.) im Geologischen Institut der Universität Oslo am 8.September 1988 führen konnte. Es umfasst den gesamten Lebenslauf und die wichtigsten wissenschaflichen Leistungen dieses aussergewöhnlichen Geologen und Mineralogen. Er wurde in Wien am 17. Mai 1916 geboren, kam aber mit seinen Eltern schon 1917 nach Oslo, wo er am 8. Oktober 1994 starb (K. Bjørlykke 1995).Im Folgenden sollen aus dem Interview nur seine wegweisenden Untersuchungen der Quicktone, seine fachliche Vielseitigkeit, sein gesellschaftliches Engagement und seine schwierigen Erfahrungen mit Deutschland herausgegriffen werden. Das in der Landessprache geführte Gespräch wurde von Geir Ebelfoff und Lars Erik Kastilan ins Deutsche transkribiert. 相似文献
82.
Ohne Zusammenfassung 相似文献
83.
Fabio Bellatreccia Giancarlo Della Ventura Luisa Ottolini Eugen Libowitzky Anton Beran 《Physics and Chemistry of Minerals》2005,32(1):65-76
A well-characterized suite of vesuvianite samples from the volcanic ejecta (skarn or syenites) from Latium (Italy) was studied by single-crystal, polarized radiation, Fourier-transform infrared (FTIR) spectroscopy and secondary-ion mass-spectrometry (SIMS). OH-stretching FTIR spectra consist of a rather well-defined triplet of broad bands at higher-frequency (3,700–3,300 cm–1) and a very broad composite absorption below 3,300 cm–1. Measurements with E//c or Ec show that all bands are strongly polarized with maximum absorption for E//c. They are in agreement with previous band assignments (Groat et al. Can Mineral 33:609, 1995) to the two O(11)–H(1) and O(10)–H(2) groups in the structure. Pleochroic measurements with changing direction of the E vector of the incident radiation show that the orientation of the O(11)–H(1) dipole is OHc~35°, in excellent agreement with the neutron data of Lager et al. (Can Mineral 37:763, 1999). A SIMS-based calibration curve at ~10% rel. accuracy has been worked out and used as reference for the quantitative analysis of H2O in vesuvianite by FTIR. Based on previous SIMS results for silicate minerals (Ottolini and Hawthorne in J Anal At Spectrom 16:1266, 2001; Ottolini et al. in Am Mineral 87:1477, 2002) the SiO2 and FeO content of the matrix were assumed as the major factors to be considered at a first approximation in the selection of the standards for H. The lack of vesuvianite standards for quantitative SIMS analysis of H2O has been here overcome by selecting low-silica elbaite crystals (Ottolini et al. in Am Mineral 87:1477, 2002). The resulting integrated molar absorption FTIR coefficient for vesuvianite is i=100.000±2.000 l mol–1 cm–2. SIMS data for Li, B, F, Sr, Y, Be, Ba REE, U and Th are also provided in the paper. 相似文献
84.
Ibrahim M. Shalaby Eugen Stumpfl Hassan M. Helmy Mahmoud M. El Mahallawi Omar A. Kamel 《Mineralium Deposita》2004,39(5-6):608-621
The Um Samiuki Zn–Cu–Pb–Ag mineralisation, south Eastern Desert, Egypt is hosted by felsic volcanic rocks which form part of the 712-Ma-old, east-west-trending Shadli Volcanic Belt. Two major occurrences of massive sulphides are present at the top of rhyolitic breccia in the Western and Eastern mine areas. In each occurrence, a bornite-bearing zone is overlain by a pyrite-chalcopyrite-bearing zone and underlain by a disseminated, Cu-depleted zone. In the massive sulphide ore, sphalerite, chalcopyrite, pyrite, galena, bornite and tetrahedrite–tennantite are major minerals, whereas arsenopyrite, pyrrhotite, molybdenite and magnetite are accessory phases. Covellite and digenite are common secondary minerals. Bornite, tetrahedrite–tennantite and covellite contain high amounts of silver (averages of 1.97, 1.39 and 1.82 wt% respectively). Based on mineralogical balance calculations, bornite and covellite accommodate 80% of silver in the Um Samiuki deposit. Ag was incorporated in the crystal structure of the early-crystallised copper sulphides and sulphosalts and silver minerals. The temperature, sequential precipitation of the fluids and the structure of the crystallising phases control the distribution of silver. Post-depositional deformation and metamorphic processes caused liberation, remobilisation and redeposition of silver within the massive sulphides.Editorial handling: D. Lentz 相似文献
85.
Using the output from five climate model experiments (four equilibrium GCMs and one transient GCM) for a double carbon dioxide
atmospheric concentration, the climate change scenarios in Romania for a time slice up to 2075 were constructed. These scenarios
were used to assess the climate change impacts on different resource sectors: agricultural crops, forests, and water resources.
The vulnerability of each sector and specific adaptation options were then analysed.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
86.
Prof. Dr. Eugen A. Von Thomas Dr. Christer G. Örn 《Aquatic Sciences - Research Across Boundaries》1982,44(1):117-148
Hypolimnetic oxygen in the highly eutrophic Swiss lake Greifensee (area 8 km2, maximum depth 33 m) was almost entirely depleted during summer stratification. We found a strong empirical relation between
wind action across the lake surface and hypolimnetic reoxygenation in the cold half year. Long periods of ice cover severely
limited anemogenic reoxygenation.
相似文献
87.
Summary The paper is dealing with the separation problem of weak intensity anomalies from the perturbation background. By means of the Shannon's form and based on the values estabilished for a measured gravitational field, g, the mean quantity of information sent forth at the source — perturbating body — is calculated in order to intercept the g set. This quantity takes a maximum value above the perturbating body, while for the remainder a deadening of the perturbations is obtained. 相似文献
88.
Patterns and trends in the perception of seismic risk. Case study: Bucharest Municipality/Romania 总被引:1,自引:1,他引:0
This research looks at the very nature of perception of seismic risk, an issue that is not only academically important, but
also it can save lives and reduce injury and community costs. The background idea is that citizens in big cities, vulnerable
to seismic hazard are living with latent and permanent concerns about a possible earthquake. We were interested in revealing
significant aspects of Bucharest citizens’ orientations and tendencies in relation to the possible seismic event. Bucharest,
the capital of Romania, is exposed to the greatest seismic hazard compared with other European capitals. The dimensions of
study were: the anticipations of seism occurrence, the behavior during the event, evaluations of consequences, support factors,
and individual vulnerability. This article is an example of the low cost approach on a sample of 190 citizens, understood
as an exercise in attempting to relate population characteristics to various aspects of risk perception. The methodology used
was based on a field investigation, where the research agents’ applied one questionnaire containing free/post codified/fan
answers concerning: demographic variables, the buildings’ features, and perceptions about the possible earthquake event. The
findings of this study showed that the hazard perception significantly associates with aspects concerning the subjects’ orientation
toward institutional factors/human relations/negativism, and toward financial/material/moral support in case of disaster etc.
It is hoped that this issue will serve to inspire further investigations into this very important and socially sensitive field,
due to the fact that hazard analysis and mitigation would be more effective when it takes into account the human dimension
of disasters. 相似文献
89.
90.
Venera Ionescu Maria Năstăsescu Lucreţia Spiridon Valentin A. C. Bulgăreanu 《International Journal of Salt Lake Research》1998,7(1):45-80
An inventory of the aquatic and circum-lacustrine flora and aquatic fauna of 23 karst- and anthroposaline lakes formed on Miocene rock salt bodies in Romania was undertaken. Simultaneous field determinations of water and sediment pH, total dissolved solids, Secchi transparency and lake maximum depth were also made. Environmental conditions for phytoplankton, microphytobenthos, macrophyte and cormophyte species were defined. Relations between the numbers of plankton, microbenthos, macrophyte and cormophyte species differentiated pelogenous (usually, therapeutic) and non-pelogenous lakes. High densities and occurrence frequencies characterized the most representative species. For three of these species, Amphora veneta, Artemia sp. and Potamogeton pectinatus, ecological conditions were noted. In the circum-lacustrine vegetation, glycophytes were more important than halophytes. 相似文献