Pipe

Prospect, Active

Commodities and mineralogy

Main commodities Au
Ore minerals gold; magnetite; pyrite
Gangue minerals anhydrite; biotite; quartz; sericite

Geographic location

Quadrangle map, 1:250,000-scale RM
Quadrangle map, 1:63,360-scale A-3
Latitude 61.0764
Longitude -159.8952
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is on the east flank of the ridge on the west side of California Creek. It is about 0.4 mile northeast of the center of section 3, T. 11 N., R. 60 W., of the Seward Meridian. The prospect occupies most of this NE 1/4 section. The location is probably accurate to within 1,000 feet.

Geologic setting

Geologic description

The Pipe prospect was identified by a soil sample survey completed by Tonogold Resources, Inc. in the summer of 2005 (Strachan, 2005). Regional mapping by Box and others (1993) was supplemented by more detailed mapping by Wenz (2005) who inferred presence of Jurassic plutons not recognized by Box and others (1993).
The rocks at the Pipe prospect are Jurassic volcanic rocks that have been hornfelsed by inferred Jurassic diorite sills intruding them (Wenz, 2004, 2005). The Pipe prospect lies west of Rocky Ridge (RM036) along a structural strike which intersects a northeast structural trend. This northeast structural trend is marked by magnetics, dacite dikes, veins, and geochemistry at Wallace (RM025) (Strachan, 2005).
As of 2009, Nyac Gold LLC has a mining lease agreement with Calista Corporation covering the Nyac area, which includes this prospect (Flanders and others, 2009).
Geologic map unit (-159.897504985467, 61.0756676135987)
Mineral deposit model Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a).
Mineral deposit model number 36a
Age of mineralization Probably mid-Cretaceous as at the Bonanza Ridge prospect, ARDF number RM037 (Wenz, 2004, 2005).
Alteration of deposit Hornfels of sedimentary rocks by intruding Jurassic diorite sills and Cretaceous intermediate composition plutons (Wenz, 2004, 2005).

Production and reserves

Workings or exploration
Tonogold completed detailed soil geochemical surveys in several areas in 2005 and the Pipe prospect was identified by that survey (Strachan, 2005).
As of 2009, Nyac Gold LLC has a mining lease agreement with Calista Corporation covering the Nyac area, which includes this prospect (Flanders and others, 2009).
Indication of production None

Additional comments

Tonogold Resources, Inc. (2006) has a mining lease agreement with Calista Corporation covering the Nyac area, which includes this prospect.

References