نتایج جستجو برای: emplacement mechanism

تعداد نتایج: 567112  

2001
T. J. FOWLER

The late Pan-African Fawakhir, Urn Had and Urn Effein Granite Plutons in the Egyptian Central Eastern Desert are small, elongate to circular bodies of pink monzogranite and syenogranite, and grey monzodiorite. Structural investigation of the intrusive contacts of these plutons reveals marginal sub-horizontal intrusive sheets as magma injection along preexisting flat-lying structures including m...

2009
Neil C. Rowe Matthew O'Hara Gurminder Singh

We are investigating the use of wireless nonimaging-sensor networks for the difficult problem of detection of suspicious behavior related to IED emplacement. Hardware for surveillance by nonimaging-sensor networks can cheaper than that for visual surveillance, can require much less computational effort by virtue of simpler algorithms, and can avoid problems of occlusion of view that occur with ...

1999
James R. Zimbelman

Three long lava flows on Mars, Venus, and the Moon were examined in order to evaluate their possible emplacement rate and condition. On the Moon, flows o f the lay1 (phase 111) effusion within the Imbrium impact basin were examined using Apollo photography. The longest phase 111 flow can be followed for 250 km, terminating -400 km from the probable source vent. This flow has a width of 10 t o 2...

1997
MATTHEW J. KOHN FRANK S. SPEAR JOHN W. VALLEY

reflect the dewatering of structurally lower levels after nappe emMuscovite and biotite dehydration-melting reactions near the peak placement. If so, then nappe emplacement occurred at T~475°C. of metamorphism played a significant role in the reaction and fluid history of the Rangeley Formation in southwestern New Hampshire, USA. Evidence for in situ melting includes: (1) the consistency among ...

2006
B. YOUNG

Apophyllite, analcite, chabazite, prehnite and stilbite are described from pectolite-, chlorite-, calciteand quartz-bearing veins and joint coatings in the late Carboniferous quartz dolerite of the Whin Sill of the northern Pennines. These veins represent the final hydrothermal stages in the sill's emplacement and are not related to the widespread lead-zinc-barium-fluorite mineralization of the...

Journal: :Icarus 2023

Landforms with characteristic flow-like morphology are distributed across the southwestern portion of Utopia Planitia, Mars. Although some features have previously been interpreted as mud flows associated a former presence partly frozen muddy ocean based on their morphologies and similarities terrestrial analogues (Ivanov et al., 2014, Icarus 228; Ivanov 2015, 248), such interpretations remain ...

2001
Yuri Fialko

At fast and superfast spreading mid-ocean ridges, such as the East Pacific Rise, a plate boundary is defined by a narrow (tens to hundreds of meters wide) neovolcanic zone within which the bulk of the upper oceanic crust is created. However, detailed near-bottom observations indicate that the volcanic construction may occasionally persist several kilometers off of the ridge axis. It has been pr...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2008
mostafa khosravy el-hossaini mehdi maerefat kiumars mazaheri

the present paper compares full kinetics mechanisms in numerical modelling of porous radiant burners (prb), with their reduced forms. the two most frequently used mechanisms of methane combustion (gri3.0 and miller) were selected and their effects were examined on temperature, species concentration, burning speed, and pollutant emission. while the findings of numerical simulation of prb show fi...

2009
R. Lena

Mare domes are smooth low features with gentle convex upward profiles. Isolated domes may be found in almost all maria, but significant concentrations occur in the Hortensius/Milichius/T. Mayer region, Oceanus Procellarum, and Mare Tranquillitatis [1]. The Marius Hills in Oceanus Procellarum represent the lunar region in which domes are most abundant. The surface material of the complex has bee...

Journal: :Geology 2023

The Valanginian Weissert Event (ca. 134.5 Ma) has long been linked to emplacement of the Paraná-Etendeka large igneous province (LIP). Although several Mesozoic crises were triggered by volcanic CO2 emissions and global warming, causing oceanic oxygen depletion, featured climate cooling limited marine anoxia. Here, impact silicate weathering on environmental change during is investigated presen...

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