Homburger (Newton Gulch)

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold; limonite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale C-1
Latitude 64.5437
Longitude -165.3214
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Homburger lode prospect is at an elevation of about 325 feet in upper Newton Gulch (NM262), on the south flank of Newton Peak. The map location is in the SW1/4 section 8, T. 11 S., R. 33 W., Kateel River Meridian. This is locality 53 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).

Geologic setting

Geologic description

About a dozen exploration shafts, some almost 100 feet deep, were dug on oxidized, limonite-stained, decomposed bedrock near a schist-marble contact in the headwaters of Newton Gulch (Smith, 1909; Mertie, 1918 [B 662-I, p. 425-449]). The deposit consists of pyrite in quartz stringers and as disseminations on the schist. Composite samples averaged about 0.25 ounce of gold per ton (Mertie, 1918; Cathcart, 1922). Bedrock in Newton Gulch is mostly amarble and schist, probably of early Paleozoic protolith age (Hummel, 1962 [MF 247]; Till and Dumoulin, 1994; Bundtzen and others, 1994). The marble-schist unit is in contact with another schist unit near this prospect.
Geologic map unit (-165.324003366976, 64.5429361217815)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a).
Mineral deposit model number 36a
Age of mineralization Mid-Cretaceous or younger; veins cut schist metamorphosed in the mid-Cretaceous.
Alteration of deposit Oxidation.

Production and reserves

Workings or exploration About a dozen shafts and at least 2 churn-drill holes had explored this prospect by 1918 (Mertie, 1918 [B 662-I, p. 425-449).
Indication of production None

References

MRDS Number A012852

References

Till, A.B., and Dumoulin, J.A, 1994, Geology of Seward Peninsula and St. Lawrence Island, in Plafker, G., and Berg, H.C., eds., The Geology of Alaska: Geological Society of America, DNAG, The Geology of North America, v. G-1, p. 141-152.
Reporters C.C. Hawley and Travis L. Hudson
Last report date 7/10/2000