Gold and Other Precious Metals: From Ore to Market by Claudia Gasparrini

By Claudia Gasparrini

The literature on gold deposits has elevated exponentially prior to now 8 years. The books on gold geology and exploration conceal often definite geographical components (for instance, Gold in Canada, and so on. ), or they include papers provided at symposia and congres­ ses. The procedure frequently lacking in different texts is the single which mixes geology with mineral­ ogy and the restoration difficulties and which addresses the earth scientist in addition to the ex­ tractive metallurgist. Dr. Claudia Gasparrini has controlled to fill this hole rather well. She builds a bridge from the ore geology point to the mineralogical parameters and correct­ ties, particularly for the ore dressing engineer and, even supposing to a lesser quantity, for the ex­ ploration geologist. along with her booklet, she is helping to forestall blind, one-sided restoration makes an attempt, and issues aptly to the significance of mineralogical and principally actual houses, reminiscent of the mineral intergrowth and the function of linked minerals. The intergrowth determines very important steps of the metallurgical procedures, and a few of the linked minerals might mess-up the restoration technique. i'm confident that engineers and scientists will realize and recognize that the ap­ proach awarded within the current publication has to be brought in every single place and never merely in only a few areas. on the contrary, the small corporation wishes it simply as badly, if no more than the massive one. I wholeheartedly aid the author's purpose to prove.

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Sample text

Once in the pyrargyrite, the silver was reporting with the zinc concentrates or was lost in the tails. Figures 4A, Band C are the x-ray spectra of the tetrahedrite grains identified in copper concentrates from three consecutive runs. The spectra show decreasing heights for the copper peaks and increasing heights for the silver peaks. Figure 40 is the spectrum representative of the composition of the pyrargyrite identified in the zinc concentrates and tailings and containing no appreciable amounts of copper.

P. Mohide 1988, personal communication). 26 Other information necessary for estimates of recovery costs first, and then for the planning of efficient recovery strategies, extends to a variety of chemical and mineralogical data which could be summarized to include the metal geochemistry, the general ore chemistry, the type and physical character of the host rock and the mineralogy/ore microcomposition. Detail varies, when determining such information, depending on whether we are dealing with base or precious metals: the precious metals require higher accuracy which extends well into the microscopic level, and which is provided only by the more advanced microanalytical instruments.

For example, the information on the microanalytical instruments in chapter 4 of this book, up-to-date during the 1980's, became partly outdated by the time the manuscript went to the presses. In the midst of such rapid scientific progress, the mineral industry, particularly in the field of precious metal extractions, has generally developed while maintaining a slower pace. Changes in metal recovery techniques during the past 100 years do not appear to be as dramatic as those registered within other fields of technology.

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