The completement conditions of geology exploration of gold deposits which were started during the period of / the seventh five year0 and / the eighth five year0 in China were Summarized and were looked back, and the gold output in China have been in creased greatly and China have become one of the most important and largest countries of gold output in the world.
To maintain sustainable development of the gold deposits, it is necessitated for geoscientists to refresh their ideas of metallogeny and use all kinds of useful technologies to find more mineral deposits.At the same time, the gold mines which are in service,should be strict to the measurement, put forwards to rational development,and make sure the gold industry can fast, continued and healthily develop.
With considering the development of worldwide gold science and technology, key problems and challenges on resources exploration, mining, extractive metallurgy, environmental protection, market etc.,of China gold science and technology at the turning of the new Century are discussed. Some research fields concern for the sustainable development of
The northern part of Da-Xiao Xing’an Mountains is a permafrost region with cold weather and longtime gelivation.Many rivers there have deep slope and rapidly current ,and have two flood peaks when in ice run and raining season. They vary greatly in water level and rate of flow and have a large carrying capacity.As the seasonal rivers erode and sediments alternately and periodicly ,they are very helpful for carrying ,panning and selecting gold to form deposits.
It has proved by investigations and experiments that the rich block of placer gold in the permafrost region is at the lower
of sediments as a result of one2way freezing of salt seperating out and gold enriching.
The gold deposits of
The gold leaching rate increased from 47% to 90% by the application of alkaline hot-Press oxidation of finely disseminated gold ore. The effects of amounts of alkali, temperature, partial pressure of oxygen, oxidation time et al. on the technology of alkaline hot-press oxidation were investigated.
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