Download or read book Arizona Gold Placers and Placering written by Eldred D. Wilson and published by . This book was released on 2011-10-01 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arizona Gold Placers and Placering was published by the Arizona Bureau of Mines in conjunction with University of Arizona as Bulletin 118 in 1922 and eventually became what it is today as bulletin 142 in 1937 fourth revised edition. This book covers all of the known Placers in Arizona by county. Additional information on the placers, their formation, History, Geology, production and locations are included. In addition, best types of recovery for these placers are discussed.

Download or read book Arizona Gold Placers and Placering written by University of Arizona. State Bureau of Mines and published by . This book was released on 1933 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Placer Gold Deposits of Arizona written by Maureen G. Johnson and published by . This book was released on 1972 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: A catalog of location, geologogy and production with lists of annotated references pertaining to the placer districts.

Download or read book Gold Placers and Placering in Arizona written by Arizona. Bureau of Mines and published by . This book was released on 1961 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gold placers, or deposits such as gravel and sand which contain notable concentrations of gold, all result from the slow milling and concentration processes incident to natural erosion of pre-existing gold-bearing rocks. The origin of many gold placers is traceable directly to auriferous veins, lodes, or replacement deposits which, in most instances, were not of high grade. According to Emmons, placers are not apt to form from goldbearing outcrops that contain abundant manganese, iron sulphides, and chlorides, unless precipitating agents such as calcite, siderite, rhodochrosite, pyrrhotite, chalcocite, nepheline, olivine, or leucite are abundant, or unless erosion is very rapid. In other words, the gold may be dissolved and carried below by means of natural chlorination processes that are established when solutions containing chlorides, together with sulphuric acid from the oxidation of iron sulphides, act upon manganese dioxide; but this process is neutralized if precipitating agents are present, and may be ineffective if erosion is very rapid

Download or read book Arizona Gold Placers and Placering written by University of Arizona. State Bureau of Mines and published by . This book was released on 1937 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Arizona Gold Placers and Placering written by Eldred Dewey Wilson and published by . This book was released on 1932 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Arizona Gold Placers written by Arizona Bureau Mines and published by Createspace Independent Publishing Platform. This book was released on 2016-05-25 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leading mining historian Kerby Jackson introduces us to a classic mining publication on the Gold Mining Industry in Arizona. Written in 1927, this hard to find publication includes valuable insights into the gold placer deposits of Arizona. Highlighted here are the details you need to find placer gold in Arizona, including the location of Arizona placer gold mines. Note: This edition is a perfect facsimile of the original edition and is not set in a modern typeface. As such, some type characters and images might suffer from slight imperfections or minor shadows in the page background.

Download or read book Arizona Gold Placers and Placering written by Carl Lausen and published by . This book was released on 1931 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Placer Gold Deposits of Arizona Classic Reprint written by Maureen G. Johnson and published by Forgotten Books. This book was released on 2017-10-28 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Placer Gold Deposits of Arizona Eighty-seven placer districts in Arizona are estimated to have produced a mini mum Oi ounces of placer gold from 1774 to 1968. The location, areal extent, past production, mining history, and probable lode source summarized for each district are based on information Obtained from a wide variety of published reports relating to placer deposits. Annotated references to all reports that contain information about individual deposits are given for each district. 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.

Download or read book Gold Placers and Placering in Arizona written by Eldred Dewey Wilson and published by . This book was released on with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gold Placers and Placering in Arizona written by E. D. Wilson and published by . This book was released on 1978 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Placer Gold Deposits of Arizona written by Geological Survey (U.S.) and published by . This book was released on 1969 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PLACER GOLD DEPOSITS OF ARIZONA written by MAUREEN G. JOHNSON and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gold Placers and Placering in Arizona written by and published by . This book was released on 1961 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gold placers, or deposits such as gravel and sand which contain notable concentrations of gold, all result from the slow milling and concentration processes incident to natural erosion of pre-existing gold-bearing rocks. The origin of many gold placers is traceable directly to auriferous veins, lodes, or replacement deposits which, in most instances, were not of high grade. According to Emmons, placers are not apt to form from goldbearing outcrops that contain abundant manganese, iron sulphides, and chlorides, unless precipitating agents such as calcite, siderite, rhodochrosite, pyrrhotite, chalcocite, nepheline, olivine, or leucite are abundant, or unless erosion is very rapid. In other words, the gold may be dissolved and carried below by means of natural chlorination processes that are established when solutions containing chlorides, together with sulphuric acid from the oxidation of iron sulphides, act upon manganese dioxide; but this process is neutralized if precipitating agents are present, and may be ineffective if erosion is very rapid

Download or read book Bulletin written by University of Arizona. State Bureau of Mines and published by . This book was released on 1952 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Placer Gold Mining in Arizona written by Us Dept of Geological Survey and published by CreateSpace. This book was released on 2015-07-29 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leading mining historian Kerby Jackson introduces us to a classic mining publication on the Gold Mining Industry in Arizona. Unavailable since 1922, this hard to find publication includes valuable insights into the placer gold mines of the Arizona. Originally released as "Placer Gold of Arizona," despite its small size, this publication includes important details into the history, geology and locations of the well known placer gold mines and prospects in the State of Arizona. Note: This edition is a perfect facsimile of the original edition and is not set in a modern typeface. As such, some type characters and images might suffer from slight imperfections or minor shadows in the page background.

Download or read book Placer Gold Deposits of Arizona written by Maureen G. Johnson and published by . This book was released on 1987-12-01 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Authoritative guides to placer locations. Maps of placer deposits included.