WORLD MINERAL RESOURCES: A SUGGESTED SURVEY*
نویسندگان
چکیده
منابع مشابه
Mineral resources and geo-engineering
Metals used in everyday life are produced from ores occurring in the Earth’s crust. Geological processes are known to concentrate minerals to form ores of economic value. Mineral processing engineers concentrate these ores by mechanical and physico-chemical methods while the extractive metallurgist extracts the metals by chemical means.
متن کاملPerfectionists in a World of Finite Resources
I’VE BEEN TOLD that I can be a perfectionist—but I’m working on that and expect that I can improve myself. In the meantime, there are just so many things that seem to need doing, and they all seem to be things that a well-rounded person should be able to do. Find me at a concert, and I’ll be beating myself up for not knowing how to play a musical instrument. Find me on travel, and I’ll be regre...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1942
ISSN: 0028-0836,1476-4687
DOI: 10.1038/150565a0