Geological Survey of Canada, Current Research (Online) no. 2000-E10 PDF Download
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Author: S. Connell
Publisher: Natural Resources Canada
ISBN: 0660182149
Category : Metamorphic rocks
Languages : en
Pages : 9
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Book Description
Presents and discusses results of detailed textural examination using scanning electron microscopy on samples from the Giant and Con gold mines, Northwest Territories. The study was a preliminary investigation designed to determine the electrical conductivity mechanisms of the mineralized sericite schist from alteration zones that parallel the gold-bearing quartz veins in the Yellowknife mining district. Results are highlighted for four samples and include schematic representations of rock texture and three-dimensional electrical resistivity. The purpose of the study was to obtain information required to help develop efficient exploration strategies.
Author: S. Connell
Publisher: Natural Resources Canada
ISBN: 0660182149
Category : Metamorphic rocks
Languages : en
Pages : 9
Get Book Here
Book Description
Presents and discusses results of detailed textural examination using scanning electron microscopy on samples from the Giant and Con gold mines, Northwest Territories. The study was a preliminary investigation designed to determine the electrical conductivity mechanisms of the mineralized sericite schist from alteration zones that parallel the gold-bearing quartz veins in the Yellowknife mining district. Results are highlighted for four samples and include schematic representations of rock texture and three-dimensional electrical resistivity. The purpose of the study was to obtain information required to help develop efficient exploration strategies.
Author: Shauna Connell
Publisher: Natural Resources Canada
ISBN: 0660187256
Category : Metamorphic rocks
Languages : en
Pages : 8
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Book Description
The purpose of this paper is to document results of electrical resistivity determinations of mineralized sericite schist specimens cut from a single sample collected from the Gold Lake area, Northwest Territories. Resistivity results are presented for frequencies of one hertz to one megahertz and for various orientations within the specimens. The results have application in interpreting ground electromagnetic surveys that are being conducted in the area.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 398
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Book Description
Author: Martin De Keijzer
Publisher: Natural Resources Canada
ISBN: 0660179970
Category : Faults (Geology)
Languages : en
Pages : 12
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Book Description
A well-exposed section about 250 metres wide below the high water line of the Jennings River, Teslin Lake map area in northern British Columbia shows part of the Teslin Fault and provides an opportunity to constrain the fault's kinematic history by direct ground observations. This report describes preliminary structural observations of this section of the Teslin Fault, including the rock types involved, mylonitic & ultramylonitic structures, and deformation. Indications of two main episodes of shearing are discussed.
Author: Government Publishing Office
Publisher:
ISBN: 9781411343627
Category : Science
Languages : en
Pages : 202
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Book Description
Mineral Commodity Summaries 2019
Author: Sharon E. Kroening
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 122
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Book Description
Author: Cheryl A. Naus
Publisher:
ISBN:
Category : Geochemistry
Languages : en
Pages : 130
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Book Description
Author: K. J. Schulz
Publisher: Geological Survey
ISBN: 9781411339910
Category : Business & Economics
Languages : en
Pages : 868
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Book Description
As the importance and dependence of specific mineral commodities increase, so does concern about their supply. The United States is currently 100 percent reliant on foreign sources for 20 mineral commodities and imports the majority of its supply of more than 50 mineral commodities. Mineral commodities that have important uses and face potential supply disruption are critical to American economic and national security. However, a mineral commodity's importance and the nature of its supply chain can change with time; a mineral commodity that may not have been considered critical 25 years ago may be critical today, and one considered critical today may not be so in the future. The U.S. Geological Survey has produced this volume to describe a select group of mineral commodities currently critical to our economy and security. For each mineral commodity covered, the authors provide a comprehensive look at (1) the commodity's use; (2) the geology and global distribution of the mineral deposit types that account for the present and possible future supply of the commodity; (3) the current status of production, reserves, and resources in the United States and globally; and (4) environmental considerations related to the commodity's production from different types of mineral deposits. The volume describes U.S. critical mineral resources in a global context, for no country can be self-sufficient for all its mineral commodity needs, and the United States will always rely on global mineral commodity supply chains. This volume provides the scientific understanding of critical mineral resources required for informed decisionmaking by those responsible for ensuring that the United States has a secure and sustainable supply of mineral commodities.
Author: C. D. Pint
Publisher: Natural Resources Canada
ISBN: 0660180030
Category :
Languages : en
Pages : 11
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Book Description
Describes a geologic mapping project in the area of the Nechako reservoir in central interior British Columbia. Includes description of regional geology, stratigraphic units, volcanic & plutonic rocks, and geologic structure. Evidence for two periods of deformation of Hazelton Group rocks in the study area is discussed.
Author: Michele Ver Ploeg
Publisher: DIANE Publishing
ISBN: 1437921345
Category : Health & Fitness
Languages : en
Pages : 160
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Book Description
The Food, Conservation, and Energy Act of 2008 directed the U.S. Dept. of Agr. to conduct a 1-year study to assess the extent of areas with limited access to affordable and nutritious food, identify characteristics and causes of such areas, consider how limited access affects local populations, and outline recommend. to address the problem. This report presents the findings of the study, which include results from two conferences of national and internat. authorities on food deserts and a set of research studies. It also includes reviews of existing literature, a national-level assessment of access to large grocery stores and supermarkets, analysis of the economic and public health effects of limited access, and a discussion of existing policy interventions. Illus.
