Sonora Creek Ridge

Prospects, Active

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale BD
Quadrangle map, 1:63,360-scale B-2
Latitude 64.412
Longitude -144.77
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Sonora Creek Ridge prospect is located on a ridge in the headwaters of Sonora Creek, a tributary of Central Creek (BD011). The prospect is part of a 72-square-mile claim block that includes the Pogo deposit (BD033) and parts of Central Creek. The approximate center of the prospect is in SE1/4NE1/4 section 9, T. 6 S., R. 15 E., of the Fairbanks Meridian. A winter trail from Big Delta on the Richardson Highway provides access up the Goodpaster River. A 1,500-foot airstrip is also located at the mouth of Pogo Creek, about 7 miles northwest. Sonora Creek Ridge was not identified as a separate location by Cobb (1972; MF-388) or by Cobb and Eberlein (1980).

Geologic setting

Geologic description

The Sonora Creek Ridge prospect is part of a 72-square-mile claim block that includes the Pogo deposit (BD033) and parts of Central Creek (BD011). The regional bedrock is composed of high grade gneisses intruded by Cretaceous granitic bodies. The area is predominantly cut by northwest-trending, high-angle faults. However, there are other high angle faults with various orientations (Smith, 1998). To the north, the region is intruded by the Cretaceous Goodpaster Batholith (Teck Resources Inc., unpublished report, 1998).
A regional stream-sediment sampling program identified gold, arsenic, and tungsten anomalies at nearby Liese Creek and Pogo Creek in 1981. From 1991 to 1998, exploration of the claim block has included a total of 171,859 feet of drilling and collected 9,641 core samples and 5,508 geochemistry samples (M. Smith, oral communication, 1999). A rock sample collected during the 1998 field season from Sonora Creek Ridge contained 3 ounces/ton Au. The exploration program of the claim block identified an 8-mile-long trend of anomalous soil geochemistry extending from the Pogo deposit to the southeast (Teck Resources Inc., unpublished report, 1998).
Geologic map unit (-144.772341978595, 64.4116220077213)
Mineral deposit model Plutonic-related mesothermal.

Production and reserves

Workings or exploration A regional stream sediment sampling program identified gold, arsenic, and tungsten anomalies in the nearby Liese Creek and Pogo Creek in 1981. From 1991 to 1998, the exploration program of the claim block has drilled a total of 171,859 feet of drilling and collected 9,641 core samples and 5,508 geochemistry samples (M. Smith, oral communication, 1999). During the 1998 field season, a rock sample collected from Sonora Creek Ridge contained 3 ounces/ton Au. The exploration program of the claim block identified an 8 mile long trend of anomalous soil geochemistry extending from the Pogo deposit to the southeast (Teck Resources Inc., unpublished report, 1998).
Indication of production None

Additional comments

Sonora Creek Ridge is part of the Pogo project, a joint venture of Teck Corporation, Sumitomo Metal Mining, and Sumitomo Corporation. The Teck Corporation is the principal operator of the project and can earn a 40 percent interest in the property.

References

MRDS Number 10307237

References

Smith, Moira, 1998, 1998 Exploration update on the Pogo property, Goodpaster River district, Alaska [abs.], in Mining, Alaska's State and Native Lands: Anchorage, Alaska: Alaska Miners Association, 1998 Proceedings, p. 65.
Teck Resources Inc., 1998, Pogo project advanced exploration program, Stage II application and plan of operations: Teck Resources Inc. report, 75 p.
Reporters Cameron S. Rombach (ADDGS)
Last report date 4/26/1999