Title: The Comstock Lode: Its Character, and the Probable Mode of Its Continuance in Depth
Publisher: HardPress Ltd
Publication Date: 2021
Language: English
ISBN 10: 0371877709
ISBN 13: 9780371877708
Binding: Paperback / softback
Condition: New
Weight: 526 grams

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Synopsis

The Comstock Lode: Its Character, And The Probable Mode Of Its Continuance In Depth by Ferdinand Freiherr Von Richthofen. This seminal geological treatise examines Nevada’s celebrated Washoe district and the Comstock vein, analyzing its rock associations, structure, and ore distribution from the surface downwards. Richthofen argues that the vein is a true fissure vein, formed through solfataric action linked to outbursts of sanidin-trachyte, and traces the development of veinstuff from below, including the incorporation of country-rock fragments, clayey matter, and quartz. The work details the vein’s enclosing rocks (syenite, propylite, metamorphic quartzite, and related rocks), its outcroppings, and the distribution of ore in northern and southern sections, noting a general decline in yield with depth but an evolving, widespread distribution of middle- and low-grade ores. The author compares the Comstock lode with other major argentiferous veins worldwide, emphasizing its vast scale and the potential for indefinite depth. Richthofen also assesses practical means to secure future productivity, notably advocating a deep adit-level drainage tunnel to lower costs, improve ventilation, and enable deeper exploration. The volume blends geology, mining engineering, and strategic planning for sustained ore production.

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