Aloha Prospect, Rampart Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Aloha Prospect	Prospect
Rampart Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Location: This site represents a lode exploration area on Elephant Mountain that extends from Aloha Creek east into the Livengood quadrangle (North Star Exploration, Inc., 2000 [DLR2000-17]). For this record, the site is on the west flank of Elephant Mountain along Aloha Creek at an elevation of about 1,700 feet, in the southeast quarter of section 7, T. 5 N., R. 12 W., of the Fairbanks Meridian. The location is accurate within about 0.5 mile.
Geology: The Aloha prospect area straddles the Tanana and Livengood quadrangles, on and around Elephant Mountain. Elephant Mountain is underlain by a Cretaceous granite stock that mainly intrudes Jurassic or Cretaceous quartzite, sandstone, siltstone, and shale (Chapman and others, 1982; Reifenstuhl and others, 1997 [RI 97-15a]). North Star Exploration, Inc,. has mapped a rind of hornfels [and marble] around the granite stock, and high-angle faults that cut all units (North Star Exploration, Inc., 2000 [Reduced calcic gold skarns]). Aeromagnetic surveys of the area indicate that the stock has fairly low magnetic signatures and the surrounding rocks have variable signatures (Staff and others, 1997). Potential exploration targets, which fall on the outer edge of the hornfels zone, have very high magnetic signatures at high resolution. The hornfels zone generally has a magnetic high coincident with EM (electromagnetic) conductors along its outer edge, near the marble (North Star Exploration, Inc., 2000 [Reduced calcic gold skarns]). The North Star report further states that this is a typical geophysical signature for a reduced gold skarn. North Star Exploration, Inc., has not published results of their exploration in this area. However, based on its data, including anomalous gold, arsenic, antimony, copper, and bismuth in samples from the prospect, the company is modeling the prospect potentially as a reduced calcic gold skarn deposit (North Star Exploration, Inc., 2000 [DLR2000-17]; North Star Exploration, Inc., 2000 [Reduced calcic gold skarns]). North Star Exploration, Inc., believes that this site is drill-ready.
Workings: There have been geological and geophysical surveys by the Alaska Division of Geological and Geophysical Surveys (Staff and others, 1997; Reifenstuhl and others, 1997 [RI 97-15a]). North Star Exploration, Inc., identified the Aloha prospect as a priority target in the late 1990's based on compilation and interpretation of regional and detailed geological, geophysical, geochemical, and Landsat data. Included in this compilation are proprietary and public domain, helicopter-borne magnetic/resistivity/EM (electromagnetic) geophysical surveys that the company is using to identify skarn targets (North Star Exploration, Inc., 2000 [Reduced calcic gold skarns]).
Age: Cretaceous or younger, inferred from age of granite stock.
Alteration: Contact metamorphism of country rocks peripheral to Cretaceous granite stock.

Commodities (Major) - Au; (Minor) - As, Bi, Cu, Sb
Development Status: None
Deposit Model: Au-Cu skarn(?) (Cox and Singer, 1986; model 18b).

Other Databases

Link to USGS - Alaska:	TN060

Other Regions, Features and Areas containing this locality

References