Waterfall Creek Prospect, Black Mining District, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Waterfall Creek Prospect	Prospect
Black Mining District	Mining District
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

This prospect is located on Doyon, Limited selected or conveyed land. For more information, contact Doyon, Limited. This site is within the Yukon-Charley Rivers National Preserve.
Location: The Waterfall Creek prospect area encompasses about 20 square miles; the approximate center of the area is in section 29, T. 6 N., R. 32 E., of the Fairbanks Meridian. The coordinates are for the most mineralized portion of the prospect area, which trends north-northeast through the center of section 1, T. 6 N., R. 32 E., of the Fairbanks Meridian. This location is accurate to within one mile. This prospect is located within Doyon, Limited selected or conveyed land.
Geology: The Waterfall Creek prospect is underlain by northwest-dipping, Upper Proterozoic to Lower Cambrian Tindir Group rocks (redbeds, basalt, limestone, and conglomerate), which transition northwestward into black chert, green siltstone, and quartzite (DiMarchi and others, 1993). The Waterfall Creek thrust separates the Tindir Group from a Cambrian through Permian sedimentary sequence which lies to the west. Bedding in this area generally strikes north-northeast and dips from 80SE to 55NW (DiMarchi and others, 1993). Minor fine-grained disseminated pyrite is present in altered basalt and siltstone units. Alteration consists mostly of chloritization of basalt and oxidation of cherts and siltstones. Iron oxides are found locally, most of them in clasts of breccia which is hosted by silicified limestone or quartzite. White quartz veins and drusy quartz veinlets and vuggy fillings are also common in brecciated rocks (DiMarchi and others, 1993). Soil and stream sediment samples taken by WGM Inc. and by ASA Inc. are anomalous in zinc in the prospect area. Weak anomalies of molybdenum and lead were also found (DiMarchi and others, 1993).
Workings: WGM Inc. conducted a soil and rock sampling program on the property in the mid-1970s, and in 1993 ASA Inc. conducted a soil and rock sampling program and geologic mapping. The property is located on Doyon, Limited selected or conveyed land.
Age: Permian or younger.
Alteration: Alteration at the Waterfall Creek prospect consists of chloritization of the basalt, iron oxide in breccia clasts in silicified limestone or quartzite, and quartz veins and vug fillings (DiMarchi and others, 1993).

Commodities (Major) - Zn; (Minor) - Mo, Pb
Development Status: None
Deposit Model: Fault-controlled Zn?

Other Databases

Link to USGS - Alaska:	CY036

Other Regions, Features and Areas containing this locality

References