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Development of Marine placers, northeastern Queen Charlotte Islands, British Columbia, Canada
The possibility exists for economic gold and titanium placer mineral deposits in the nearshore and shelf regions off western Canada. On the eastern shores of Graham Island of the Queen Charlotte Islands, a regionally extensive (60 km) upper shoreface heavy mineral deposit occurs that contains variable gold grades between 0 and 4 g/tonne and Ti of up to 7.0%. The deposit in any particular area is ephemeral, the result of wave action in a macrotidal setting along an eroding unconsolidated coast. Similar offshore deposits likely exist along drowned paleo‐shorelines and fluvial channeb that formed during the early Holocene in the same setting as found today on Graham Island. The preservation of drowned beach and fluvial heavy mineral concentrations arises from a rapid relative sea level rise that occurred across the shallow shelf east of the Queen Charlotte Islands approximately 10,500 years ago.
Development of Marine placers, northeastern Queen Charlotte Islands, British Columbia, Canada
The possibility exists for economic gold and titanium placer mineral deposits in the nearshore and shelf regions off western Canada. On the eastern shores of Graham Island of the Queen Charlotte Islands, a regionally extensive (60 km) upper shoreface heavy mineral deposit occurs that contains variable gold grades between 0 and 4 g/tonne and Ti of up to 7.0%. The deposit in any particular area is ephemeral, the result of wave action in a macrotidal setting along an eroding unconsolidated coast. Similar offshore deposits likely exist along drowned paleo‐shorelines and fluvial channeb that formed during the early Holocene in the same setting as found today on Graham Island. The preservation of drowned beach and fluvial heavy mineral concentrations arises from a rapid relative sea level rise that occurred across the shallow shelf east of the Queen Charlotte Islands approximately 10,500 years ago.
Development of Marine placers, northeastern Queen Charlotte Islands, British Columbia, Canada
Barrie, J. Vaughn (author) / Emory‐Moore, Margot (author)
Marine Georesources & Geotechnology ; 12 ; 143-158
1994-01-01
16 pages
Article (Journal)
Electronic Resource
Unknown
Development of Marine Placers, Northeastern Queen Charlotte Islands, British Columbia, Canada
| Online Contents | 1994
| British Library Online Contents | 2007