نتایج جستجو برای: volcanic rock
تعداد نتایج: 52326 فیلتر نتایج به سال:
چکیده ندارد.
Nanoparticles (NPs) from the mining of volcanic rocks have been a matter concern around world because they can pose environmental and human health risks. The nanoparticles are pointed as opportunities application in large field knowledge. aim this study is to provide an overview scientific publications on success rates mineral nanoparticles, use soil remineralizers alternative for replacing hig...
The measurement and analysis of seismicity in active volcanic areas is the main tool used in volcanic hazard mitigation. However, seismic monitoring technologies have met with only mixed success in forecasting eruptive episodes. This arises because, although our understanding of the spatio-temporal processes generating the observed seismic signals has increased substantially with the wide scale...
Catastrophic collapses of the flanks of stratovolcanoes constitute a major hazard threatening numerous lives in many countries. Although many such collapses occurred following the ascent of magma to the surface, many are not associated with magmatic reawakening but are triggered by a combination of forcing agents such as pore-fluid pressurization and/or mechanical weakening of the volcanic edif...
Cold groundwater and geothermal effluent in the Lake Mývatn area has been divided into six distinct groups according to origin and geothermal influence. This division is based on stable isotope ratios, chemical composition and geographical positions. The groundwater has apparently two basically separate origins, i.e. the local high ground north of Lake Mývatn and the highlands far to the south,...
In different regions across the globe, elevated arsenic contents in the groundwater constitute a major health problem. In this work, a biopolymer chitosan has been blended with volcanic rocks (red scoria and pumice) for arsenic (V) removal. The effect of three blending ratios of chitosan and volcanic rocks (1:2, 1:5 and 1:10) on arsenic removal has been studied. The optimal blending ratio was 1...
Cryptomaria, lunar volcanic deposits obscured by crater and basin impact ejecta, can provide important information about the thermal and volcanic history of the Moon. The timing of cryptomare deposition has implications for the duration and flux of mare basalt volcanism. In addition, knowing the distribution of cryptomaria can provide information about mantle convection and lunar magma ocean so...
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