|Quadrangle map, 1:250,000-scale||NM|
|Quadrangle map, 1:63,360-scale||C-1|
|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 descriptionAbout 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.|
|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|
Bundtzen, T.K., Reger, R.D., Laird, G.M., Pinney, D.S., Clautice, K.H., Liss, S.A., and Cruse, G.R., 1994, Progress report on the geology and mineral resources of the Nome mining district: Alaska Division of Geological and Geophysical Surveys, Public Data-File 94-39, 21 p., 2 sheets, scale 1:63,360.
Cathcart, S.H., 1922, Metalliferous lodes in southern Seward Peninsula: U.S. Geological Survey Bulletin 722-F, p. 163-261.
Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.
Hummel, C.L., 1962, Preliminary geologic map of the Nome C-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-247, 1 sheet, scale 1:63,360.
Mertie, J.B., Jr., 1918, Lode mining and prospecting on Seward Peninsula, in Brooks, A.H., and others, Mineral resources of Alaska, report on progress of investigations in 1916: U.S. Geological Survey Bulletin 662, p. 425-449.
Smith, P.S., 1909, The Iron Creek region, in Brooks, A.H., and others, Mineral resources of Alaska, Report on progress of investigations in 1908: U.S. Geological Survey Bulletin 379, p. 302-354.
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|