iron-aluminum alloys are one of the most resistant alloys against sulfidation/oxidation environments with low oxygen partial pressures. the high sensitivity to hydrogen embrittlement is the main reason for decreasing of their room temperature ductility. there is a drop of strength above 600 c and their creep resistance is fairly weak. it is possible to increase ductility up to 15 percents and i...

INTRODUCTION The term epithermal derives from the genetic classification scheme for hydrothermal ore deposits proposed by Lindgren (1933). On the basis of stratigraphic relationships in volcanic sequences, and by analogy with mineral and metal occurrences and mineral textures in active hydrothermal systems, Lindgren inferred that epithermal deposits formed at <200°C and <100 atmospheres (~100 b...

Maps of epithermal- and fast-neutron fluxes measured by Lunar Prospector were used to search for deposits enriched in hydrogen at both lunar poles. Depressions in epithermal fluxes were observed close to permanently shaded areas at both poles. The peak depression at the North Pole is 4.6 percent below the average epithermal flux intensity at lower latitudes, and that at the South Pole is 3.0 pe...

Under laboratory conditions, snail Indoplanorbis exustus exhibited a strongly positive linear correlationship between duration of desiccation to mortality and body-weight loss and also body-weight loss to mortality. The adult stage of snail is highly resistant to desiccation, whereas the juvenile stage is highly susceptible. Reasons for decrease in susceptibility to desiccation with increase in...

Introduction Iron-nickel sulfides are found in most or all solar system environments, and are probably the only minerals found in all extraterrestrial materials on hand. Despite this ubiquity, they have only just begun the attention they deserve. The most common Fe-Ni sulfides in chondrites are troilite (FeS), pyrrhotite (Fe 1-x S) and pentlandite (Fe,Ni) 9 S 8. Troilite is believed to have res...

The Dongpuzi deposit is an epithermal gold located in the southern margin of Shaozihe volcanic fault basin Liaodong Peninsula. On basis fluid inclusion and C–H–O–S–Pb isotope data, a metallogenic model established for deposit. mineralization at has experienced quartz–pyrite (I), quartz–sulfide (II), quartz–calcite (III) stages. quartz from ore stage II liquid-dominated aqueous inclusions, which...