Unnamed (on Old Glory Creek)

Occurrence, Active?

Commodities and mineralogy

Main commodities As; Au; Sb; Zn
Other commodities Ag
Ore minerals arsenopyrite; pyrite; sphalerite; stibnite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale D-3
Latitude 65.8468
Longitude -163.187
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on both sides of Old Glory Creek at the mouth of Nelson Creek. It is about 0.4 mile west of the center of section 7, T. 5 N., R. 22 W. The location is accurate.

Geologic setting

Geologic description

Herreid (1966) described mineralized, quartz segregations and boudins in schist and marble in an old placer cut just above the mouth of Nelson Creek. A sample contains 0.02 ounce of gold per ton, 0.10 ounce of silver per ton, 0.05 percent copper, 0.05 percent lead, and 0.05 percent zinc (Herreid, 1966). The rocks in the area are Paleozoic schist and marble (Till and others, 1986); they are locally bleached and altered to clay at the occurrence.
In 2006, Royal Pretoria Mines working for Millrock Resources Inc. carried out geochemical surveys in the area; they defined a geochemical anomaly in gold, arsenic, and antimony over this occurrence (Hawley, 2007). Subsequently, they discovered mineralized float on both sides of Old Glory Creek. The float consisted of silicified carbonate rocks with quartz veinlets and a iron-stained quartz boulder with various combinations of stibnite, arsenopyrite, and pyrite. Five samples contained up to 0.92 parts per million (ppm) gold, more than 10,000 ppm antimony, 4,750 ppm zinc, and 3,130 ppm arsenic.
Geologic map unit (-163.189694594735, 65.8461029167024)
Mineral deposit model Gold-stibnite-arsenopyrite-quartz veins in marble.
Age of mineralization Unclear, other than the mineralization is younger than the Paleozoic host rocks. Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.
Alteration of deposit Schist is bleached locally and crosscut by a zone of clay alteration.

Production and reserves

Workings or exploration Mineralized float occurs on both sides of Old Glory Creek; sampled by government and industry geologists.
Indication of production None
Reserve estimates None.
Production notes None.

References