Geological Survey of Canada, Current Research (Online) no. 2000-C9

Geological Survey of Canada, Current Research (Online) no. 2000-C9

Author: T. Hadlari

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 12

ISBN-13: 0660180286

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This report is part of an ongoing study to characterize both sequence stratigraphy and chronostratigraphy of the Baker Lake Basin, Nunavut. The investigators examined well-exposed segments of the basin in detail, emphasizing sequence stratigraphic analysis to identify genetic packages of strata related to tectonically controlled basin-filling rhythms. Three sections exposed at the western edge of Thirty Mile Lake have been measured and correlated, yielding data on five depositional sequences. After an introduction on the geologic setting of the study area, the report provides facies assemblage descriptions and interpretations of the five depositional sequences of the lower Baker Lake Group. Finally, the accommodation (or space made available for a sedimentary system to fill) cycle in the basin is discussed and conclusions are drawn regarding the subsidence mechanism in the basin.


Geological Survey of Canada, Current Research (Online) no. 2000-C8

Geological Survey of Canada, Current Research (Online) no. 2000-C8

Author: R. H. Rainbird

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 11

ISBN-13: 0660180278

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Presents an examination of field relationships along the northern margin of Baker Lake Basin, Nunavut, with the goal of establishing the stratigraphy of the Dubawnt Supergroup in relation to paleogeography, depositional setting, and provenance. Includes information on the regional geology, local geology (Christopher Island Formation sedimentary & volcanic rocks, the newly named Amarook Formation, and the overlying Pitz and Thelon formations), and discusses faulting during the development of the Baker Lake Basin.


Geological Survey of Canada, Current Research (Online) no. 2004-C2

Geological Survey of Canada, Current Research (Online) no. 2004-C2

Author: Ross L. Sherlock

Publisher: Natural Resources Canada

Published: 2004

Total Pages: 13

ISBN-13: 0662368681

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This paper reports the results of a mapping program in the vicinity of the Boston gold deposit near Hope Bay, south-west Nunavut. It first reviews the regional geology, the granitoid rocks of the Hope Bay volcanic belt, and their contact relationships with the belt. It then focusses on the geology of the deposit area, with descriptions of the rock types, the geologic structures, and the gold mineralization. Finally, implications of the findings for mineralization in other areas of the Hope Bay belt are discussed.


Geological Survey of Canada, Current Research (Online) no. 2000-A10

Geological Survey of Canada, Current Research (Online) no. 2000-A10

Author: L. C. Struik

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 10

ISBN-13: 0660180022

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The final year of the Nechako NATMAP project to study the geology of central British Columbia was used to research information collected in the field & laboratory, and to compile & document the study results. This article includes a review of upcoming publications & other products, by type of product: maps, journal articles, conference presentations, and computer products, as well as ongoing research on petrology, palaeontology, terrane characterization, tectonics & structure, and Quaternary geology.


Geological Survey of Canada, Current Research (Online) no. 2000-A5

Geological Survey of Canada, Current Research (Online) no. 2000-A5

Author: Martin De Keijzer

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 12

ISBN-13: 0660179970

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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.


Critical Mineral Resources of the United States

Critical Mineral Resources of the United States

Author: K. J. Schulz

Publisher: Geological Survey

Published: 2017

Total Pages: 868

ISBN-13: 9781411339910

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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.


Geological Survey of Canada, Current Research (Online) no. 2000-A11

Geological Survey of Canada, Current Research (Online) no. 2000-A11

Author: C. D. Pint

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 11

ISBN-13: 0660180030

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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.


Geological Survey of Canada, Current Research (Online) no. 2000-A6

Geological Survey of Canada, Current Research (Online) no. 2000-A6

Author: P. Van Der Heyden

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 11

ISBN-13: 0660179989

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Describes reconnaissance geological studies conducted in the south-west Nass River area of northern British Columbia. Includes descriptions of the Bowser Lake Group of sedimentary rocks, Eocene plutonic rocks, metamorphic rocks, possibly Miocene granite, mafic dykes, and Pleistocene & Recent volcanic strata, as well as the area's structural geology.