The Northern Cordilleran ... PDF Download

Author: British Columbia Mountaineering Club
Publisher: Vancouver.
ISBN:
Category : British Columbia
Languages : en
Pages : 100

View

Book Description

Author: Robert S. Hildebrand
Publisher: Geological Society of America
ISBN: 0813724953
Category : Science
Languages : en
Pages : 182

View

Book Description
"In this well-illustrated book, Hildebrand expands upon his model for the development of the North American Cordillera detailed in Special paper 457. Starting with an overview of Cordilleran geology he goes on to provide an in depth look at how the Rubian ribbon continent was assembled. He integrates the complex geology of the Cordillera into an actualistic model involving arc magmatism, arc-continent collision, slab failure magmatism, and transcurrent motion in both Rubia and the western North American margin. While much of the focus is on the assembly of the Rubian ribbon continent, Hildebrand explores its interactions with North America during the Sevier and Laramide events and concludes that North America was the lower plate in both"--Provided by publisher.

Author: Maurice Colpron
Publisher:
ISBN:
Category : Geology
Languages : en
Pages :

View

Book Description
This summary report commences with a brief metallogenic overview of the northern Pacific Rim, with particular attention paid to the world-class Mesozoic and Cenozoic ore deposits that define the region's premier metallogenic provinces. This is followed by a summary of the relative attractiveness of the region's various mining jurisdictions, as recorded by recent exploration activity.

Author: S. P. Gordey
Publisher: Geological Survey of Canada
ISBN:
Category : Science
Languages : en
Pages : 232

View

Book Description
This report presents a detailed account of the tectonic evolution, stratigraphy, structure, and igneous history of Nahanni map area and summarizes and describes mineral deposits in terms of their regional geological setting. It provides basic geological data and a geological framework critical to the appraisal of and search for mineral deposits, and to other geological studies in the region.

Author: Robert S. Hildebrand
Publisher: Geological Society of America
ISBN: 0813725321
Category : Nature
Languages : en
Pages : 123

View

Book Description
In this Special Paper, Hildebrand and Whalen present a big-picture, paradigm-busting synthesis that examines the tectonic setting, temporal relations, and geochemistry of many plutons within Cretaceous batholithic terranes of the North American Cordillera. In addition to their compelling tectonic synthesis, they argue that most of the batholiths are not products of arc magmatism as commonly believed, but instead were formed by slab failure during and after collision. They show that slab window and Precambrian TTG suites share many geochemical similarities with Cretaceous slab failure rocks. Geochemical and isotopic data indicate that the slab failure magmas were derived dominantly from the mantle and thus have been one of the largest contributors to growth of continental crust. The authors also note that slab failure plutons emplaced into the epizone are commonly associated with Cu-Au porphyries, as well as Li-Cs-Ta pegmatites.

Author: Henry V. Lyatsky
Publisher: Springer
ISBN: 3540486933
Category : Science
Languages : en
Pages : 494

View

Book Description
Steep crustal-scale faults, having their origins in the Late Archean and Early Proterozoic and trending NE-SW, which define the fundamental block lithospheric structure of the North American craton, are seen from geological and geophysical evidence to continue far into the interior of the Late Proterozoic-Phanerozoic Canadian Cordilleran mobile megabelt. This suggests that variously reworked ex-cratonic basement blocks underlie much of the Cordillera. The western edge of the modern craton is probably near the Rocky Mountain-Omineca belt boundary; the Rocky Mountain fold-and-thrust belt on the east side of the Cordillera is evidently rootless and overlies the undisturbed cratonic basement. Phanerozoic differences between the Cordilleran tectonic belts, resulting from a long, dissimilar, multi-cycle history of waxing and waning orogenesis apparent from the rock record, lie chiefly in the degree of indigenous tectonic remobilization and reworking of the ancient crust.

Author: Reginald Aldworth Daly
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 674

View

Book Description

Author: Ruth Margrit Gotthardt
Publisher: [Whitehorse] : Yukon, Heritage Branch
ISBN:
Category : Archaeology
Languages : en
Pages : 356

View

Book Description
Reports on the results of investigations of 23 prehistoric sites in the Rock River headwaters, northern Yukon in order to construct a chronological and cultural framework of prehistoric occupation which could be integrated into the known culture-historic sequence for the interior northwest.

Author: Robert S. Hildebrand
Publisher: Geological Society of America
ISBN: 0813724570
Category : Science
Languages : en
Pages : 80

View

Book Description
Within the Sonora segment to the south, break-off magmatism was also prevalent. Both the Canadian and Sonoran segments have abundant porphyry copper mineralization temporally and spatially associated with the break-off magmas, which suggests a genetic link between slab failure and porphyry copper mineralization. By 53 Ma, eastwardly dipping subduction of Pacific Ocean crust was generating arc magmatism on the amalgamated Cordilleran collision zone in both the Canadian and Sonoran segments. Oceanic schists, such as the Orocopia-Pelona-Rand, were formed in the ocean basin west of Rubia and accreted during initiation of the new easterly dipping subduction zone. A major transform fault, called the Phoenix fault, connects the Sevier fold-thrust belt at the California-Nevada border with that in eastern Mexico and separates the Great Basin and Sonoran segments. It juxtaposes the Sierra-Mojave-Sonora block alongside the Transition Zone of the Colorado Plateau. Cordilleran events affected the subsequent development of western North America. For example, the structural Basin and Range Province appears to coincide with the region where exotic allochthons sit atop North American crust in both the Great Basin and Sonoran segments. Also, within the triangular Columbia embayment, large segments of Rubia appear to have escaped laterally during the Cordilleran orogeny to create a lithospheric "hole" that was later filled by basalt of the Columbia River and Modoc plateaux.

Author: Geological Association of Canada. Cordilleran Section
Publisher: Rexdale, Ont. : Association of Exploration Geochemists
ISBN:
Category : Geochemical prospecting
Languages : en
Pages : 232

View

Book Description
Contains 13 of 31 technical papers presented at the Symposium. Includes papers on gold, silver and platinum metal deposits, exploration criteria for gold deposits, element distribution in gold-silver deposits, etc.