Small-scale Placer-mining Methods
Author: Charles Freeman Jackson
Publisher:
Published: 1932
Total Pages: 58
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author: Charles Freeman Jackson
Publisher:
Published: 1932
Total Pages: 58
ISBN-13:
DOWNLOAD EBOOKAuthor: California Department of Conservation
Publisher:
Published: 2016-04-09
Total Pages: 0
ISBN-13: 9781365035654
DOWNLOAD EBOOKThis report provides practical, timely information on methods and equipment used in placer gold recovery. Included is detailed information on equipment, practices, recovery factors, efficiency, design, and, where available, costs. Selected gold recovery operations are described in detail. In addition, the reported efficiency and reliability of various types of equipment used today is presented. One notable method not described is the cyanide process, the recovery of gold through leaching with cyanide, a hazardous substance that must be handled with great care. The information presented herein applies to small as well as large placer mining operations. Recreational and independent miners will find information on available equipment and designs with some suggestions for improving recovery. Those intending to mine small to medium-sized placer deposits will find detailed descriptions of suitable equipment and recovery methods. Finally, those interested in byproduct gold recovery from sand and gravel operations...
Author: United States. Bureau of Mines
Publisher:
Published: 1975
Total Pages: 292
ISBN-13:
DOWNLOAD EBOOKAuthor: Institution of Mining and Metallurgy (Great Britain)
Publisher: Elsevier Applied Science
Published: 1991
Total Pages: 624
ISBN-13:
DOWNLOAD EBOOKAuthor: Charles W. Finkl
Publisher: Springer Science & Business Media
Published: 1988-04-30
Total Pages: 868
ISBN-13: 0442224990
DOWNLOAD EBOOKField work, supplemented by laboratory studies, is a cornerstone for the geological sciences. This volume provides an introduction to general field work through selected topics that illustrate specific techniques and methodologies. One hundred and twenty-three main entries prepared by leading authorities from around the world deal with aspects of exploration surveys, geotechnical engineering, environmental management. field techniques, mapping, prospecting, and mining. Special efforts were made to include topics that consider aspects of environmental geology in particular those subjects that involve field inspections related to, for example, the placement of artificial fills, sediment control in canals and waterways, the geologic effects of cities, or the importance of expansive soils to environmental management and engineering. In addition, some widely ranging topics dealing with legal affairs, geological methodology, the scope and organization of geology, report writing, and other concepts, such as those related to plate tectonics and continental drift, provide a necessary perspective to the arena of field geology.
Author: Maureen G. Johnson
Publisher: Forgotten Books
Published: 2017-11-18
Total Pages: 146
ISBN-13: 9780331313765
DOWNLOAD EBOOKExcerpt from Placer Gold Deposits of Nevada Following the discovery of placers at Gold Canyon, placer discoveries in Nevada were broadly in three periods: the 1860's to 1880's, when many small deposits throughout the State were discovered and sporadically worked and several large placers were discovered and extensively worked; the short period between 1906 and 1910, when very rich placers were dis covered at Lynn, Battle Mountain, Manhattan, and Round Mountain; the early 1930's, when economic conditions created by the depression caused a renewed interest in placer mining, and many individuals sought, and a few discovered, new placer areas throughout the State. The location of the placers described in this report is shown on plate 1. Very little factual information can be found about the early periods of placer mining in Nevada. For many placers, the only reports available are hearsay estimates of production and speculations about the extent of the placer ground based on remnants of placer pits, shafts, and other workings. Many of the placers said to have had a high production between 1860 and 1890 were worked by Chinese miners who came to Nevada dur ing the building of the railroads and stayed on to work at mining and other activities. The Chinese were reputed to be secretive with their earnings from the placers and did not ship the gold to the mint by Wells Fargo or other shippers. They worked the gravels very thoroughly in areas where American miners did not wish to expend great labor to win the gold. The placers in the Sierra and Spring Valley districts, Pershing County, were worked by Chinese miners; they have a very high estimated production before 1900 and a comparatively low known production since that time. 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: Scott A. Stebbins
Publisher:
Published: 1987
Total Pages: 102
ISBN-13:
DOWNLOAD EBOOKAuthor: Michael Silva
Publisher: Sylvanite Publishing
Published: 2014-12-01
Total Pages: 40
ISBN-13: 9781614740377
DOWNLOAD EBOOKPlacer Gold Recovery Methods - Michael Silva - This is a great little book put out by the California Division of Mines in the 1980's and now back in print by Sylvanite Publishing. It covers in detail all the methods used to recover placer gold such as Panning, Sluicing, Jigs, Centrifugal bowls such as the Knelson Concentrator, Belt Separators, Reichert Cones, Helixes, Shaking Tables and more. These are still the standard machines used today in most placer operations.
Author: Warren E. Yeend
Publisher:
Published: 1990
Total Pages: 28
ISBN-13:
DOWNLOAD EBOOKAuthor: Charles Volney Averill
Publisher: Franklin Classics
Published: 2018-10-15
Total Pages: 370
ISBN-13: 9780343276164
DOWNLOAD EBOOKThis 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 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. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.