Tozimoran Creek Placer

Yukon-Koyukuk, Alaska

65.3754°N 152.8045°W

Mine Overview

The Tozimoran Creek Placer is in Yukon-Koyukuk, Alaska. Historically the site has been part of the Melozitna Mining District. The site was first discovered in 1902. The Tozimoran Creek Placer was closed at the time of data entry with no known plans to re-open. Production size when active was considered to be small. The ore mined is composed of gold and cassiterite with waste material consisting primarily of tourmaline. Associated rock in this area is granite.

Site identification and general characteristics. Learn about USGS mines.

Gold Primary Commodity
Lead, Silver, and Tin Secondary Commodity
Site Record Type^?
Mine Development Status^?
1902 Year Discovered^?
Small Production Size^?
Metallic Site Commodity Type^?
Small Mine Size^?

Mine Names

Name^? Status^?
Tozimoran Creek Placer Current

Commodities

Additional textual information about a site or mine.

Commodity Type Importance
Gold Metallic Primary
Lead Metallic Tertiary
Silver Metallic Tertiary
Tin Metallic Tertiary

Deposit

A LITTLE GOLD AND CASSITERITE IN BOTTOM 2 FEET OF BENCH GRAVEL; GOLD, BUT NOT CASSITERITE, IN CRACKS IN UPPER 6 IN. OF BEDROCK. A LITTLE GOLD AND CASSITERITE IN UNFROZEN CREEK ALLUVIUM. QUARTZ-CALCITE VEINS IN QUARTZ-MICA SCHIST CONTAIN SOME ARGENTIFEROUS GALENA AND CERRUSSITE. BENCH GRAVEL ABOUT 4 FEET THICK BENEATH 3 FEET OF MUCK. CREEK GRAVEL ABOUT 15 FEET THICK.

STREAM GRADIENT ABOUT 150 FEET PER MILE.; INFORMATION SOURCE: 1 PUBLIC LITERATURE; 2 UNPUBLISHED REPORTS.

THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Location Info

Yukon-Koyukuk , Alaska County / State

Continent Country State County
North America The United States Alaska n/a

Notes

USGS MF-371, LOC. 16. DEPOSIT ON BENCH ALONG SOUTH SIDE OF CREEK 2, 000 FEET DOWNSTREAM FROM ASH CREEK. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2, 500, 000 SCALE OWNERSHIP STATUS MAP (1991).

Meridian / Township / Range Description

Meridian^? Township^? Section^? Aliquot^?
Fairbanks Meridian T.6N R.26W Sec. 1 -

Land Status

Land status information.

Land Status^? Admin Area^?
State -

Mining Districts

Formal or informal mining district names.

District
Melozitna Mining District

Development

CONSIDERABLE PROSPECTING AND A LITTLE HAND MINING ON REMNANT BENCH DOWNSTREAM FROM ASH CR. DEPOSIT EXPLORED AND SAMPLED BY THE USBM AND USGS. TOTAL PRODUCTION PROBABLY NO MORE THAN A FEW OUNCES OF GOLD AND A FEW HUNDRED POUNDS OF CASSITERITE CONCENTRATE.

Geology

TWO AGES OF ALLUVIUM. OLDER IN ISOLATED REMNANTS OF BENCHES, ONE OF WHICH CARRIES GOLD AND CASSITERITE. TOURMALINE ACCOMPANIES CASSITERITE IN VEINLETS IN MICACEOUS QUARTZITE PEBBLES.; BEDROCK IS QUARTZ-MICA SCHIST AND MATIC IGNEOUS ROCKS; GRANITE ALSO PRESENT. SEQUENCE THICK.

Materials

Minerals or other materials present in the mine.

Role^? Material^?
Gangue/Waste Tourmaline
Ore Cassiterite
Ore Gold

Rocks

Geological materials at the site.

Class^? 1st Order Name^? 2nd Order Name^? 3rd Order Name^? 4th Order Name^? Most Specific Name^? Begin Time End Time Description^?
Associated Rock Plutonic Rock Granitoid Granite - Granite - - -
Host Rock Metamorphic Rock Metasedimentary Rock Quartzite - Quartzite - - -
Host Rock Metamorphic Rock Schist - - Schist - - -
Host Rock Plutonic Rock Granitoid Granite - Granite - - -

Analytical Data

Results of chemical or mineralogical analysis on materials at or near the site

Line^? Analysis Data^?
1 FINENESS DETERMINATIONS OF 835 AND 895 PARTS PER THOUSAND REPORTED. CHANNEL SAMPLES FROM BENCH INDICATED AVERAGES OF .731 LB. TIN AND .0228 OUNCE GOLD PER COPPER YD. IN BLOCK 650 FT. LONG AND 80 FT. WIDE.

Nearby Deposits

Other deposits in the same region.

Nearby Places

There are no places nearby

Nearby Mining Districts

Melozitna Mining District (0 miles away)

Footnotes

* Mine bounds on map indicate the general area that a mine occupies. For an detailed map, refer to the overseeing BLM field office.

** The mine central point is based on an average of the mine's bounding box(es) and does not necessarily fall on the claim itself.

¹ World-class significance is determined by total endowment of the contained commodity. This includes all past production and remaining reserves. Each commodity is considered separately and commodities cannot be combined to arrive at a significant size. The tonnage thresholds are from the mine model grade-tonnage studies. As of June 2008, many entries were classified as significant under less strict rules.

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