Anikovik River Beach

Mine, Inactive

Commodities and mineralogy

Main commodities Au; Sn
Ore minerals cassiterite; gold

Geographic location

Quadrangle map, 1:250,000-scale TE
Quadrangle map, 1:63,360-scale B-6
Latitude 65.491
Longitude -167.669
Nearby scientific data Find additional scientific data near this location
Location and accuracy This locality is at the mouth of the Anikovik River at York on the Bering Sea coast. York is about 9 miles east of Tin City. This is locality 35 of Cobb and Sainsbury (1972). Cobb (1975) summarized relevant references under the name 'Anikovik R.'.

Geologic setting

Geologic description

Anikovik River's eastern tributaries have headwaters in Ordovician limestone of the York Mountains (Sainsbury, 1972) whereas the main drainage and western tributaries are in areas underlain by a thin-bedded, slaty metapelitic and metasandstone sequence of unknown but probable Paleozoic age locally intruded by altered mafic bodies. This locality is in the lower part of the river within 0.25 miles of the Bering Sea. The geomorphic character of this area suggests that at least some alluvial deposits of the Anikovik River have been reworked by shoreline processes but available descriptions are insufficient to evaluate this possibility.
The two USBM churn-drill holes here (Mulligan, 1959), encountered only 3 and 4 feet of gravel and appear to have been in alluvial materials. A trace of tin was found in the heavy mineral concentrates from these churn-drill holes but the identified minerals only included pyrite, limonite pseudomorphs after pyrite, augite, ilmenite, magnetite, ankerite, and zircon (Mulligan, 1959, p. 19). Mulligan (1959, p. 5) reports that a small dredge worked in this area for 123 days during the 1914 and 1915 seasons. This dredge processed 156,000 cubic yards of gravel and recovered 1,217 ounces of gold and 1,600 pounds of concentrate containing 31 percent tin.
Geologic map unit (-167.67173990049, 65.4902161475598)
Mineral deposit model Alluvial and beach? Au-Sn placer (Cox and Singer, 1986; models 39a and 39c)
Mineral deposit model number 39a and 39c
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Mulligan (1959, p. 5) reports that a small dredge worked in this area for 123 days during the 1914 and 1915 seasons. This dredge processed 156,000 cubic yards of gravel and recovered 1,217 onces of crude gold and 1,600 pounds of concentrate containing 31 percent tin. Two USBM churn-drill holes were later completed in this area (Mulligan, 1959).
Indication of production Yes
Production notes Mulligan (1959, p. 5) reports that a small dredge worked in this area for 123 days during the 1914 and 1915 seasons. This dredge processed 156,000 cubic yards of gravel and recovered 1,217 ounces of gold and 1,600 pounds of concentrate containing 31% tin.

References