Metallogeny of the northeastern Pacific Rim: an example of the distribution of ore deposits along a growing continental margin
By: R.J. Goldfarb, C.J. Hart, and J.K. Mortensen
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.
Suggested Citation
Goldfarb, R., Hart, C., Mortensen, J., 1999, Metallogeny of the northeastern Pacific Rim: an example of the distribution of ore deposits along a growing continental margin, p. 273-285.
Study Area
| 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) |
| 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 |