Casca Basin Prospects, Black Mining District, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Casca Basin Prospects	Group of Prospects
Black Mining District	Mining District
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

The Casca Basin area lies on Doyon, Limited selected or conveyed land. For more information, contact Doyon, Limited.
Location: The Casca Basin covers an area of about 36 square miles. The coordinates for the prospects are placed in the approximate center, at the intersection of T. 6 N., and T.7 N., of the Fairbanks Meridian, and R. 31 E. and R. 23 E., of the Fairbanks Meridian. The location is accurate. The Casca Basin area lies on Doyon, Ltd. selected or conveyed land.
Geology: The bedrock near the Casca Basin prospects consists of Paleocene coal-bearing continental clastic sedimentary rocks that lie east of the Proterozoic to Precambrian Tindir Group (Northstar Exploration, Inc., 1999). Pyrite is common in clay partings and coal seams. The sedimentary section locally has above-background radiation levels, suggesting the presence of uranium or other radioactive elements. The section has tuffaceous partings, and minerals within the tuff may be the source of any such uranium. If so, this is probably a sandstone uranium or roll-front deposit (Northstar Exploration, Inc., 1999).
Workings: The Casca Basin area has been explored by surface methods, including soil and silt sampling, since the mid-1970s (Northstar Exploration, Inc., 1999).
Age: The mineralization is Paleocene or younger, based on the age of the host rocks.

Commodities (Major) - U
Development Status: None
Deposit Model: Roll-front uranium? (Cox and Singer, 1986; model 30c).

Other Databases

Link to USGS - Alaska:	CY039

Other Regions, Features and Areas containing this locality

References