نتایج جستجو برای: tuff
تعداد نتایج: 1032 فیلتر نتایج به سال:
The paper deals with the characteristics of synthesized glass-ceramics obtained by sintering a mixture final flotation waste (FFW) tuff at 1260?C for 7 h, followed annealing pressed samples 1080oC 36 h. experiments were done in order to find possibility valorization material (FFW). By thermal treatment mixtures T20 (20 % tuff, 80 FFW) and T40 (40 60 temperature 1260oC over period hours, is dend...
Performance assessment of the Yucca Mountain unsaturated zone (UZ) as the site for an underground repository of high-level radioactive waste relies on the crucial assumption that water percolation processes in the unsaturated zone can be approximated as a steadystate condition. Justification of such an assumption is based on temporal damping effects of several geological units within the unsatu...
[1] This paper describes selection and characterization of the landing site for the Mars 2004 Beagle 2 mission. The site is within Isidis Planitia between 10 –12 N, 266 – 274 W, centered at 11.6 N, 269.5 W. This is at low elevation ( 3600 to 3900 m MOLA), is flat (MOLA RMS slope = 0.57 ), radar data suggest a smoother surface at decimeter to meter scales than the Pathfinder site and it has a mo...
Supereruptions catastrophically eject 100s-1000s of km3 of magma to the surface in a matter of days to a few months. In this study, we use zoning in quartz crystals from the Bishop Tuff (California) to assess the timescales over which a giant magma body transitions from relatively quiescent, pre-eruptive crystallization to rapid decompression and eruption. Quartz crystals in the Bishop Tuff hav...
Abstract Thick sediment layers frequently cover the Japan islands’ surface, and their frictional properties significantly affect shallow slip behavior that occurs during earthquakes. However, laboratory data on of zone remain limited. We collected tuff breccia samples from deep borehole cores in Miocene “Green Tuff” formation, a major surface cover, performed velocity-stepping friction tests th...
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