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Detecting subcropping mineralizations but also deeply buried mineralizations is one important goal in geochemical exploration. The identification of useful indicators for mineralization is a difficult task, as mineralization might be influenced by many factors, including location, investigated media and depth. Here, a statistical method is proposed which indicates chemical elements related to mineralization along a transect. Moreover, the method determines the potential area of the deposit along a transect. The identification is based on general additive models (GAMs) for the element concentrations across the spatial coordinate(s). The log-ratios of the GAM fits are taken to compute the curvature, where high and narrow curvature is supposed to indicate the mineralization area. By defining a measure for the quantification of high curvature, the log-ratios can be ranked, and elements can be identified that are indicative of the anomaly patterns.
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Ferenc?ácsEmail authorView author&#;s OrcID profile Dominika?Takács Hajnalka?Breuer Nóra?Skarbit 《Theoretical and Applied Climatology》2018,131(3-4):899-926
We present a 1-km2 gridded German dataset of hourly surface climate variables covering the period 1995 to 2012. The dataset comprises 12 variables including temperature, dew point, cloud cover, wind speed and direction, global and direct shortwave radiation, down- and up-welling longwave radiation, sea level pressure, relative humidity and vapour pressure. This dataset was constructed statistically from station data, satellite observations and model data. It is outstanding in terms of spatial and temporal resolution and in the number of climate variables. For each variable, we employed the most suitable gridding method and combined the best of several information sources, including station records, satellite-derived data and data from a regional climate model. A module to estimate urban heat island intensity was integrated for air and dew point temperature. Owing to the low density of available synop stations, the gridded dataset does not capture all variations that may occur at a resolution of 1 km2. This applies to areas of complex terrain (all the variables), and in particular to wind speed and the radiation parameters. To achieve maximum precision, we used all observational information when it was available. This, however, leads to inhomogeneities in station network density and affects the long-term consistency of the dataset. A first climate analysis for Germany was conducted. The Rhine River Valley, for example, exhibited more than 100 summer days in 2003, whereas in 1996, the number was low everywhere in Germany. The dataset is useful for applications in various climate-related studies, hazard management and for solar or wind energy applications and it is available via doi: 10.5676/DWD_CDC/TRY_Basis_v001. 相似文献
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Dominika Kalasov Tom&#x; Zikmund Pavel Spurný Jakub Haloda Ji&#x;í Borovi
ka Jozef Kaiser 《Meteoritics & planetary science》2020,55(5):1073-1081
A very bright and long bolide was observed over the eastern part of the Czech Republic during late local evening on December 9, 2014. This bolide was recorded by professional instruments in the Czech part of the European Fireball Network. Three meteorites weighing in total 87 g were found in the predicted area and were named ??ár nad Sázavou. The complete material composition of the meteorite was obtained from one cut‐off piece using petrography, mineralogy, and scanning electron microscopy (together with X‐ray energy dispersive spectroscopy and wavelength dispersive spectroscopy). X‐ray computed tomography (CT) was applied on all pieces for the determination of their grain and bulk density, digitization of shape, and examination of the structural homogeneity. CT has proved its important role for nondestructive exploration of brecciated meteorites formed by distinct lithologies or petrological types. In this article, we discuss its limits in terms of structural and material resolution based on the correlation of state‐of‐the‐art CT data and SEM images. Furthermore, we introduce a new way of air cavity quantification, which distinguishes the natural porosity of meteorite and cracks related to erosion processes. This helps to discuss the presence of weathering products based on comparison of the meteorite pieces found at different times after impact. 相似文献
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Łukasz Stachnik Piotr Wałach Łukasz Uzarowicz Jacob C. Yde Zornitza Tosheva Dominika Wrońska-Wałach 《山地科学学报》2014,11(5):1097-1111
This study aims to determine the relationships between local meteorological conditions,proglacial river discharge and biogeochemical processes operating in a periglacial basin located in the Polar Ural mountain range, Russia. Fieldwork was conducted in the catchment of Obruchev Glacier(13 km2) during the summer peak flow period in 2008. River discharge was dominated by snowmelt and changed from 3300 l s-1 to less than 1000 l s-1. The mean daily air temperatures of stations situated in the mountain tundra and near Obruchev Glacier from July 11 th to August 1st 2008 were 14.4°C and 10.3°C, respectively. The glacial river had low total dissolved solids varying from 4.5 to 9 mg l-1 and coefficients of correlation between Na+ and Cl-, K+ and Cl-, as well as NH4+ and Cl- were 0.94, 0.90 and 0.84, respectively. Rainfall events affected the snowmelt initiation and provided an essential part of the discharge during the intense snowmelt period, which occurred from July 11 th to July 18 th 2008. Data showed that Na+ and K+ in the surface water derived from snowmelt rather than chemical weathering of silicates. Also, it was obtained that NO3- derived from the melting snowpack, whereas ammonification occurring under the snowpacks was the primary source for NH4+. 相似文献
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Dominika V. Polanska 《GeoJournal》2014,79(4):407-419
The aim of this article is to investigate regulations regarding housing and spatial planning to determine the extent to which these have influenced the development of gated housing in Poland since 1989. The focus is on how government policy with regard to spatial planning and housing, together with the law on property and ownership, influences the emergence and development of gated forms of housing in the country. Legal regulation documents concerning issues of housing and spatial planning between 1990 and 2013 have been studied. The article argues that the liberal policies and legal regulation in the country is resulting in a disregard for spatial planning and housing, but also the lack of integrated urban policies. Existing spatial plans are of a consultative nature and bear no regulatory capacity, at the same time as housing programmes and spatial planning in the country is strongly in favor of private investors and new construction. All these shortcomings have created a differentiated housing market, one in which housing developers maximize their profits by constructing gated housing complexes, combined with a tendency among those who have the means to move to newly built housing behind gates. The long period of developer-friendly policies and governmental support of purchasers of new construction, have resulted in increased popularity of gated communities in Poland and their spread to many Polish cities. 相似文献
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Dominika Studzińska Alena Sivkoz Stanislaw Domaniewski 《Norsk geografisk tidsskrift. Norwegian journal of geography》2018,72(2):115-126
Cross-border shopping and tourism are worldwide phenomena, appearing at any border with at least some degree of permeability. The authors investigate the range of cross-border shopping and tourism activities practised by Russians at two of the EU’s external borders, one between Finland and the Leningrad Oblast, and the other between Poland and the Russian exclave of Kaliningrad Oblast. The study is based on research conducted in the Polish–Russian and Finnish–Russian border regions between 2013 and 2015, when the authors held interviews, administered survey questionnaires, and engaged in participant observation. The information was supplemented with data from the Finnish and Polish Border Guard services. Based on the results of the fieldwork, the authors argue that cross-border shopping and tourism are often combined during the same trip, and thus constitute a specific form of cross-border activity. Their study sheds light on how cross-border shopping tourism depends on and is interconnected with more than just the factor of the non-availability of goods and services. They conclude that cross-border shopping at the Polish–Russian border and the Finnish–Russian border has become more like a Western European practice, namely shopping for pleasure. 相似文献