نتایج جستجو برای: jajarm deposite
تعداد نتایج: 86 فیلتر نتایج به سال:
معدن گوموش داش در فاصله هوایی 40 کیلومتری جنوب غرب کرج، در استان تهران و در حوزه شهرستان شهریار واقع است و بهترین راه دسترسی به آن مسیر تهران-شهریار-اشتهارد می باشد آب و هوای منطقه سرد و نیمه خشک است و ارتفاع متوسط آن را از سطح تر از دریا 1500 متر می باشد. گانسار گوموش داش در بخش شرقی کوه جارو و در دامنه جنوبی آن واقع است این کوه در واقع بخشی از کمربند ارومیه-دختر است که در منطقه زمین ساختی ساو...
Among the various phases of alumina, two phases γ and α are the most widely used in variousindustries. In this paper, γ-Al2O3 porous nanoparticles have been successfully synthesized from a s...
introduction iron-apatite ore deposits well known as kiruna iron type formed in association with calc-alkaline volcanism from proterozoic to tertiary (hitzman et al., 1992). liquid immiscibility in an igneous system was proposed to explain the formation of the iron oxides accompanying apatite in mineralized zones (förster and jafarzadeh, 1994; daliran, 1999). the mode of ore formation however, ...
introduction the mahour exploration area is a polymetallic system containing copper, zinc and silver. the mineralization can be seen in two forms of veins and disseminations. this area is structurally within the lut block, west of deh-salm village. recent exploration work and studies carried out by geologists on this volcanic-plutonic area of lut demonstate its importance indicating new reserve...
A general purpose plasma reactor has been designed and built to be used in various fields such as metallurgy, and microelectronics. The important aspects of the system design are : (a) the chamber can be evacuated to a base pressure of approximately 5 X 10-7 Tom; (b) capabilities for thermal bake out at 150°C, and nitrogen pre-burn at a pressure of about 3 X 10-3 Torr; (c) substrate holder whic...
A review is given of the present status of several of the main areas of investigation of the IV-VI compounds, with the emphasis placed on problems that still have to be solved. It would be presumptuous of me to give a critique of all of the diverse things that have been discussed at this conference, since we have covered quite a lot of ground. I shall simply try to point out some things that I ...
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