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Author : William Harvey Emmons
Publisher : Unknown
Page : 560 pages
File Size : 49,8 Mb
Release : 1917
Category : Ore-deposits
ISBN : NYPL:33433066377825
Author : William Harvey Emmons
Publisher : Forgotten Books
Page : 548 pages
File Size : 54,7 Mb
Release : 2017-10-11
Category : Science
ISBN : 0265165512
Excerpt from The Enrichment of Ore Deposits The problems of superficial alteration and enrichment are not simple. Not only do the several metals segregate in different ways, but each metal may behave differently in different mineral associa tions. Every district and every deposit should be studied separately in the light of all available chemical and geologic data. There are, however, certain laws Of segregation that almost invariably are clearly indicated, and as data have accumulated many puzzling ap parent exceptions to these laws have disappeared. This paper is an amplification of, an earlier Survey bulletin on the enrichment of sulphide ores (bulletin It is a discussion of representative deposits, especially Of the paragenesis of their ores and of the principles that underlie the processes of enrichment. I hope it may suggest to those engaged in geologic work and in mining some lines Of approach to the solution of the complex problems that are encountered in the field. I realize fully that there may be serious omissions and possibly errors in the discussion of the complex problems here presented. I shall esteem it a favor if anyone whose statements I may have mis quoted or misinterpreted will set me right, and if those who have had superior opportunities for study Of certain districts will correct any wrong impressions that I may have given. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author : William H. Emmons
Publisher : Unknown
Page : 0 pages
File Size : 46,7 Mb
Release : 1922
Category : Electronic
ISBN : OCLC:1404545026
Author : William Harvey Emmons
Publisher : Palala Press
Page : 550 pages
File Size : 42,5 Mb
Release : 2015-11-19
Category : Electronic
ISBN : 1346930082
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author : United States. Congress. House
Publisher : Unknown
Page : 530 pages
File Size : 45,5 Mb
Release : 1916
Category : Electronic
ISBN : OCLC:1062838093
Author : William Harvey Emmons
Publisher : Unknown
Page : 274 pages
File Size : 51,8 Mb
Release : 1913
Category : Chemistry, Inorganic
ISBN : HARVARD:32044032907388
Author : František Pošepný
Publisher : Unknown
Page : 292 pages
File Size : 49,5 Mb
Release : 1895
Category : Ore deposits
ISBN : COLUMBIA:CU61255165
Author : John M. Guilbert,Charles F. Park, Jr.
Publisher : Waveland Press
Page : 1000 pages
File Size : 52,6 Mb
Release : 2007-02-09
Category : Science
ISBN : 9781478608875
Modern civilizations dependence upon an increasing volume and diversity of minerals makes the search for new ore deposits ever more difficult. Now available from Waveland Press, Guilbert & Parks text presents ideas, principles, and data fundamental for beginning economic geologists to understand the genesis and localization of ore deposits and of the minerals associated with them. The authors comprehensively describe the physical and chemical characteristics of ore deposits and correlate them with environments and conditions of deposition, since ore deposits are best interpreted as extensions of the environments responsible for their enclosing rocks. Examples and illustrations emphasize structural, chemical, and temporal controls and encourage the three-dimensional thinking used by productive explorationists as they face unsolved problems. This upper-level undergraduate text is fully illustrated and meticulously indexed. Its reliable, authoritative coverage assumes an upper-level command of chemistry and physics, as well as mineralogy, petrology, and structural geology. Outstanding features . . . develops and combines the abilities of the explorationist and of the researcher of ore-forming processes structures the geologic descriptions into groupings recognized by researchers and explorers alike builds confidence, revitalizes curiosity, and encourages expanded thinking emphasizes that the days of easy discovery of outcropping ores are not over includes revised, expanded, and updated descriptions of districts
Author : František Pošepný,Rossiter Worthington Raymond
Publisher : Unknown
Page : 842 pages
File Size : 52,5 Mb
Release : 1902
Category : Ore deposits
ISBN : UOM:39015068458796
Author : Adolph Knopf
Publisher : Unknown
Page : 650 pages
File Size : 46,8 Mb
Release : 1913
Category : Geology
ISBN : IND:30000138339316
Author : Ludwig Baumann
Publisher : John Wiley & Sons
Page : 140 pages
File Size : 45,8 Mb
Release : 1976
Category : Nature
ISBN : MINN:31951000520967Y
Author : Arthur Coe Spencer
Publisher : Unknown
Page : 236 pages
File Size : 45,8 Mb
Release : 1917
Category : Geology
ISBN : UOM:39015086700625
Author : Waldemar Lindgren
Publisher : New York, Hill
Page : 984 pages
File Size : 42,7 Mb
Release : 1919
Category : Ore deposits
ISBN : STANFORD:36105033105706
Author : Frederick Henry Hatch
Publisher : Unknown
Page : 128 pages
File Size : 48,8 Mb
Release : 1929
Category : Ore deposits
ISBN : UOM:39015055141595
Author : Anonim
Publisher : NV Bureau of Mines & Geology
Page : 56 pages
File Size : 40,7 Mb
Release : 2024-06-09
Category : Electronic
ISBN : 8210379456XXX