North Fork

Location and History

The North Fork project is in the Alleghany mining district in Northern California, 35 km northeast of Grass Valley Ca.


North Fork Mining Corp., a wholly owned subsidiary of SHASTA GOLD CORP, owns 100% of the 35 un-patented mining claims that make up the North Fork Mine. The claims cover approximately 700 acres of land.


Geology and Mineralization

The Alleghany mining district is within the northern portion of the Mother Lode Belt and on the north side of the Grass Valley mining district. Gold mineralization within the Mother Lode Belt occurs along the regional, northerly-trending Melones fault system following the western flank of the Sierra Nevada Range. The belt has a strike length of more than 300km and averages about 80km in width. Gold deposits occur as mesothermal, quartz-carbonate vein systems along faults within metamorphic rocks. The Grass Valley and Alleghany districts are notable for their high gold grades and for the largest gold production among all mesothermal vein camps in Western North America.

The North Fork property is along the strike extension of the prolific gold-bearing quartz veins in the Alleghany area about 3 km to the southeast. At North Fork, data from historic underground examinations indicate a 240m wide zone containing steeply-dipping gold-bearing quartz veins locally exceeding 6m in width.As noted on historical maps, assays grading above 0.5 opt (15 g/t) Au are common. Grades exceeding 1 opt are also common. Gold veins and their host rocks in the district are capped by post-mineralization volcanic rocks, creating opportunities to discover additional concealed mineralization.

Previous Work

Placer gold was discovered in the Mother Lode Belt in 1849 and in the Alleghany district in 1852. Underground mining of high-grade veins at Alleghany began in 1853. The North Fork Mine was developed between 1875 and the 1930’s with a 13-degree decline about 1,000 feet long, then an 800 foot long crosscut connecting to a 60 degree inclined shaft from which three levels were developed. All three levels intersected significant gold grades commonly exceeding 0.5 opt Au along multiple veins. Based on the historic assays, there is an inferred resource of 100,000 tons grading at least 0.5 oz/ton grade; however exploration drilling and underground development is necessary to develop a mineable reserve. A number of other historic mines exist on the property, and some have recorded production from high-grade veins.


Given the high gold grades at North Fork, the limited development, the reported widths of the veins, and its location along strike with major gold vein systems at nearby Alleghany, the project has excellent potential for the discovery of new high-grade gold resources amenable to underground mining. There has been no systematic modern exploration on the property.

Future Plans

North Fork Mining Corp. established on-site infrastructure at the North Fork mine in 2004 and began rehabilitation of the historic decline.Grid power and a basic shop were built. In the future, one or more underground/surface drill stations will be constructed and a drilling program planned to test the vein system. The goal of the drilling program is to establish an initial geologic resource of high-grade (>0.5 opt)gold mineralization. If this exploration program is successful, additional drilling and underground development will be warranted. Targets in this area can be significant given that the nearby Sixteen to One Mine produced over one million ounces.