The Law of the Pay-Streak in Placer Deposits (Classic Reprint)
The Law of the Pay-Streak in Placer Deposits (Classic Reprint)

Author: Joseph Burr Tyrrell

Publisher: Forgotten Books

Published: 2017-10-28

Total Pages: 24

ISBN-13: 9781528018852

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Excerpt from The Law of the Pay-Streak in Placer Deposits Again, it particles of quartz and gold of equal size are dropped into water the old will sink to the bottom with more than three times the velocity of the quartz. 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.

Lunar Sourcebook
Lunar Sourcebook

Author: Grant Heiken

Publisher: CUP Archive

Published: 1991-04-26

Total Pages: 796

ISBN-13: 9780521334440

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The only work to date to collect data gathered during the American and Soviet missions in an accessible and complete reference of current scientific and technical information about the Moon.

Structural Control of Mineral Deposits
Structural Control of Mineral Deposits

Author: Alain Chauvet

Publisher: MDPI

Published: 2019-04-16

Total Pages: 256

ISBN-13: 3038977845

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"Structural Control” remains a crucial point that frequently lacks in any scientific and/or economic analysis of ore deposits, whatever their type and class. The case of lode deposits is exemplary, although also other deposits, like breccia pipe, stockwerk, massive sulphides, skarn, etc., can, surprisingly, be concerned. Several concepts like the gold-bearing shear zone have not proven valid during the last few decades in terms of our understanding of gold deposit and have been totally abandoned. Additionally, the relationships between magmatism, regional tectonic context, and mineralization remain uncertain and have been debated in several recent publications. This demonstrates that this issue is still relevant, and its solution may help in the distinction between intrusion-related and orogenic deposits. In this Special Issue, we particularly invite any case study of mineral deposits, in which it has been demonstrated that structural geology may have a significant role in the establishment of the deposit model of formation and/or on exploration and exploitation programs. Examples in which the structural model diverges from those described in the classical literature are particularly welcomed, including studies in which relationships with magmatism can be suspected and/or demonstrated. Indeed, all cases that illustrate concepts that differ from the classic ones and from theoretical models may represent significant contributions to this volume.

The A B C of Mining
The A B C of Mining

Author: Charles A. Bramble

Publisher: Alpha Edition

Published: 2021-05

Total Pages: 152

ISBN-13: 9789354546358

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This book has been considered important throughout the human history, and so that this work is never forgotten we have made efforts in its preservation by republishing this book in a modern format for present and future generations. This whole book has been reformatted, retyped and designed. These books are not made of scanned copies of their original work and hence the text is clear and readable.

Assembling California
Assembling California

Author: John McPhee

Publisher: Farrar, Straus and Giroux

Published: 2010-04-01

Total Pages: 306

ISBN-13: 0374706026

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At various times in a span of fifteen years, John McPhee made geological field surveys in the company of Eldridge Moores, a tectonicist at the University of California at Davis. The result of these trips is Assembling California, a cross-section in human and geologic time, from Donner Pass in the Sierra Nevada through the golden foothills of the Mother Lode and across the Great Central Valley to the wine country of the Coast Ranges, the rock of San Francisco, and the San Andreas family of faults. The two disparate time scales occasionally intersect—in the gold disruptions of the nineteenth century no less than in the earthquakes of the twentieth—and always with relevance to a newly understood geologic history in which half a dozen large and separate pieces of country are seen to have drifted in from far and near to coalesce as California. McPhee and Moores also journeyed to remote mountains of Arizona and to Cyprus and northern Greece, where rock of the deep-ocean floor has been transported into continental settings, as it has in California. Global in scope and a delight to read, Assembling California is a sweeping narrative of maps in motion, of evolving and dissolving lands.

Gold Mining in North Carolina
Gold Mining in North Carolina

Author: Richard F. Knapp

Publisher: North Carolina Division of Archives & History

Published: 1999

Total Pages: 0

ISBN-13: 9780865262850

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The first documented discovery of gold in the United States was in 1799 at John Reed's farm in Cabarrus County. This book traces the history of gold mining in North Carolina from that discovery to the twentieth century. The authors present case histories of John Reed and his mine and of the Gold Hill mining district in Rowan County, along with material on other gold mining activity in the state.

Economic Geology
Economic Geology

Author: Walter L. Pohl

Publisher: John Wiley & Sons

Published: 2011-03-03

Total Pages: 725

ISBN-13: 144439486X

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Humanity’s ever-increasing hunger for mineral raw materials, caused by a growing global population and ever increasing standards of living, has resulted in economic geology becoming a subject of urgent importance. This book provides a broad panorama of mineral deposits, covering their origin and geological characteristics, the principles of the search for ores and minerals, and the investigation of newly found deposits. Practical and environmental issues that arise during the life cycle of a mine and after its closure are addressed, with an emphasis on sustainable and "green" mining. The central scientific theme of the book is to place the extraordinary variability of mineral deposits in the frame of fundamental geological processes. The book is written for earth science students and practicing geologists worldwide. Professionals in administration, resource development, mining, mine reclamation, metallurgy, and mineral economics will also find the text valuable. Economic Geology is a fully revised translation of the the fifth edition of the German language text Mineralische und Energie-Rohstoffe. Additional resources for this book can be found at: www.wiley.com/go/pohl/geology. The author's website can be found at: http://www.walter-pohl.com.

Underground Mining Methods
Underground Mining Methods

Author: W. A. Hustrulid

Publisher: SME

Published: 2001

Total Pages: 736

ISBN-13: 0873351932

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Underground Mining Methods presents the latest principles and techniques in use today. Reflecting the international and diverse nature of the industry, a series of mining case studies is presented covering the commodity range from iron ore to diamonds extracted by operations located in all corners of the world. Industry experts have contributed 77 chapters. This book is certain to become a standard for every practicing mining engineer and student alike. Sections include: General Mine Design Considerations, Room-and-Pillar Mining of Hard Rock/Soft Rock, Longwall Mining of Hard Rock, Shrinkage Stoping, Sublevel Stoping, Cut-and-Fill Mining, Sublevel Caving, Panel Caving, Foundations for Design, and Underground Mining Looks to the Future.