Recent Advances in Understanding Gold Deposits

Recent Advances in Understanding Gold Deposits
Author: T. Torvela
Publisher: Geological Society of London Special Publications
Total Pages: 434
Release: 2022-12-06
Genre: Science
ISBN: 1786205491

Gold occurs in many settings, but the dynamic nature of Earth’s crust means overlapping and overprinting deposit styles are common. Characterization of mineralization from an early stage becomes important, particularly where the mineralization is complex, in order to maximize exploration and project development success and mining productivity. Various techniques are used at different stages of a project to characterize gold deposits. This Special Publication offers a cross-section of some specific techniques used to investigate a variety of gold deposit types. The papers highlight both the breadth of the available techniques and their utility in deposit characterization, but also the many significant remaining questions and problems related to the exploration and research of gold deposits. Several papers include suggestions of avenues for fruitful further research, including a paper discussing a new approach to classifying orogenic gold deposits, and a paper describing archaeological applications of natural gold analyses.

Investigative Strategies for Lead-Source Attribution at Superfund Sites Associated with Mining Activities

Investigative Strategies for Lead-Source Attribution at Superfund Sites Associated with Mining Activities
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
Total Pages: 113
Release: 2017-12-01
Genre: Science
ISBN: 0309465567

The Superfund program of the US Environmental Protection Agency (EPA) was created in the 1980s to address human-health and environmental risks posed by abandoned or uncontrolled hazardous-waste sites. Identification of Superfund sites and their remediation is an expensive multistep process. As part of this process, EPA attempts to identify parties that are responsible for the contamination and thus financially responsible for remediation. Identification of potentially responsible parties is complicated because Superfund sites can have a long history of use and involve contaminants that can have many sources. Such is often the case for mining sites that involve metal contamination; metals occur naturally in the environment, they can be contaminants in the wastes generated at or released from the sites, and they can be used in consumer products, which can degrade and release the metals back to the environment. This report examines the extent to which various sources contribute to environmental lead contamination at Superfund sites that are near lead-mining areas and focuses on sources that contribute to lead contamination at sites near the Southeast Missouri Lead Mining District. It recommends potential improvements in approaches used for assessing sources of lead contamination at or near Superfund sites.

Structural Control of Mineral Deposits

Structural Control of Mineral Deposits
Author: Alain Chauvet
Publisher: MDPI
Total Pages: 256
Release: 2019-04-16
Genre: Science
ISBN: 3038977845

"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.

A Dictionary of Mining, Mineral, and Related Terms

A Dictionary of Mining, Mineral, and Related Terms
Author: United States. Bureau of Mines
Publisher:
Total Pages: 1284
Release: 1968
Genre: Mineral industries
ISBN:

Includes about 55,000 individual mining and mineral industry term entries with about 150,000 definitions under these terms.

The Geography of Phytochemical Races

The Geography of Phytochemical Races
Author: Bruce A. Bohm
Publisher: Springer Science & Business Media
Total Pages: 358
Release: 2008-10-11
Genre: Science
ISBN: 1402090528

This book provides an overview of geographic patterns in the distribution of plant secondary metabolites in natural populations. It covers examples within continents, after the ice, intercontinental disjunctions, oceanic islands, and polar disjunctions.

Dangerous River

Dangerous River
Author: Raymond M. Patterson
Publisher: New York : William Sloane Associates
Total Pages: 340
Release: 1954
Genre: Canoes and canoeing
ISBN:

Narrative of author's journey up South Nahanni River, NWT in 1927 and his winter in that region in 1928-29.