Alvinella; Cub Creek Prospect, Lisburne Mining District, Northwest Arctic Borough, Alaska, USAi

Regional Level Types
Alvinella; Cub Creek Prospect	Prospect
Lisburne Mining District	Mining District
Northwest Arctic Borough	Borough
Alaska	State
USA	Country

The prospect is located on NANA-owned lands.
Location: This prospect is at an elevation of about 1,000 feet in the northwest wall of lower Ikalukruk Creek. The map site is in the NW1/4 of section 30, T. 32 N., R. 18 W., of the Kateel River Meridian. This site also is referred to as the Cub Creek prospect.
Geology: The Alvinella prospect is in the southern part of a several-square-mile area which contains five surface showings of lead and zinc mineralization in the black shales of the Mississippian Lisburne Formation. The geologic and structural setting is similar to that at Red Dog (ARDF number DL001). Thrust faults cause repetition of the mineralized shale horizon. The thrust blocks overlie the Cretaceous Wolverine Creek allochthon, which is the structural footwall of the Red Dog sequence. Drilling at the prospect has intercepted zones of low-grade mineralization. The prospect is named for fossilized worm tubes commonly found in the Ikalikrok Member, which consists of silicified, sulfide-bearing shale, carbonate, and non-silicified shales. The tubes are associated with at least minor base-metal sulfides and are thought to indicate sites of hydrothermal discharge (Young, 1989).
Workings: The general area has been mapped, sampled, and explored by geophysical surveys. Several core holes, drilled since the early 1980's, have intercepted thin, low-grade mineralization (Scott Jennings, oral communication, 1999).
Age: Mississippian.
Alteration: Slight silicification.

Commodities (Major) - Pb, Zn
Development Status: None
Deposit Model: Sedimentary exhalative Zn-Pb (Cox and Singer, 1986; model 31a).

Other Databases

Link to USGS - Alaska:	DL015

Other Regions, Features and Areas containing this locality

References