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Metallogeny of the northeastern Pacific Rim: an example of the distribution of ore deposits along a growing continental margin

By:
, , and
Edited by:
Graeme Weber

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Abstract

The distribution of mineral deposits within northwestern North America (Alaska, Yukon, and northern British Columbia) allows for an in-depth examination of the metallogenic patterns of a growing continental margin. A more complete understanding of the tectonic evolution of this part of the Pacific Rim, achieved over the last 15 to 20 years, now allows for the placement of ore systems into a well-defined plate tectonic framework. Ore deposits older than about 185 Ma represent hydrothermal systems that were active in the platform/shelf environment of ancestral North America's miogeocline or hydrothermal systems developed in oceanic arcs and continental fragments more distal to the craton. These include important SEDEX, VMS, and pre-accretionary porphyry deposits. In contrast, most mineral deposits younger than about 185 Ma were formed within the growing Cordilleran orogen, as terranes were accreted to the continental margin during interactions between the North America and Pacific/Farallon/Kula plates. Such syn- to post-accretionary mineralised systems include many large lode gold and porphyry/skarn systems.

Geospatial Extents

Additional Publication Details

Publication type:
Book
Publication Subtype:
Conference publication
Title:
Metallogeny of the northeastern Pacific Rim: an example of the distribution of ore deposits along a growing continental margin
Year Published:
1999
Language:
English
Publisher:
Australasian Institute of Mining and Metallurgy
Publisher location:
Carlton, Australia
Description:
p. 273-285
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
Larger Work Title:
PACRIM '99 Congress: 10-13 October 1999, Bali, Indonesia (The Australasian Institute of Mining and Metallurgy Publication Series no. 99/4)
Number of Pages:
13
Conference Title:
PACRIM '99 Congress
Conference Location:
Bali, Indonesia
Conference Date:
1999-10-10T00:00:00
Country:
Canada;United States
State:
Alaska
Other Geospatial:
British Columbia;Yukon