Newsboy

Mine, Active

Commodities and mineralogy

Main commodities Ag; Au
Other commodities Cu; Pb; Sb; Zn
Ore minerals arsenopyrite; chalcopyrite; gold; pyrite; sphalerite; stibnite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale LG
Quadrangle map, 1:63,360-scale A-1
Latitude 65.0561
Longitude -147.4737
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Newsboy Mine is just south of the saddle between Cleary Creek and Last Chance Creek. It is at an elevation of about 1,750 feet, approximately two miles north-northeast of Pedro Dome in the SE1/4 section 26, T. 3 N., R. 1 E., of the Fairbanks Meridian. It is located with within the Golden Summit Project area. The location is accurate within 500 feet.

Geologic setting

Geologic description

The Newsboy mine was one of the major producers in the Cleary Hill area. Production began in 1911 and continued intermittently until World War II. The Newsboy mine was first staked June 25, 1909 (Times Publishing Company, 1912). The Newsboy shear zone was traced for several hundred feet on the surface and additional claims were staked. In October, 1911, a 5-stamp Joshua Hendy Mill was erected (Brooks, 1912; Smith, 1913a and 1913b). The mill operated for only a few months due to lack of water. Brooks (1912) indicated that by mid-1911 the Newsboy Mine shaft had reached the 200-foot level and working drifts had been driven on the 60-foot and 115-foot levels. By the end of 1911 the bottom of the shaft was at the 315-foot level and drifting was being conducted on a 4-foot-wide shear zone on the 215-foot and 315-foot levels.
By May 12, 1912, the mill had been moved to placer claim #11 above Discovery on Cleary Creek, about 4,000 feet northeast of and 600 feet lower than the Newsboy Mine. Water for the mill was taken from a 100-foot-deep 6-inch well, located near the mill (Smith, 1913a).
By 1913, the Newsboy Mine was being developed on the 60-, 115-, 168-, 215- and 315-foot levels. The 115-foot level extended 140 feet southwest and 100 feet northeast of the shaft and much of the ore between this level and the 168-foot level had been mined (Chapin, 1914). A few feet east of the shaft on the 115-foot level the shear zone was mined over a 14 foot width. The 315-foot level was accessed by 250 feet of drifts, but this level of the mine was flooded in 1913 (Chapin, 1914).
Surface trenching was conducted along the shear zone in 1923 but the mine was idle (Stewart, 1923). During 1931, renovation was completed on the mine and the old mill on upper Cleary Creek (Pilgrim, 1932; Smith, 1933a and 1933b), and the shaft was opened to the 160-foot level (Hill, 1933). In October, the nearly retrofitted mill burned to the ground. Development work continued in the mine and de-watering was begun in the lower mine levels (Pilgrim, 1932; Stewart, 1933; Hill, 1933).
In 1932, a diesel-powered 180-cubic-foot-capacity Sullivan compressor was installed at the mine. One-hundred and fifty tons of ore from above the 215-foot level was shipped seven miles to the Tom Gilmore Mill on Fairbanks Creek. The 215-foot level was reopened in 1932 and minor exploratory work was conducted in 1933 (Smith, 1934). The Newsboy mill was rebuilt in 1933. New grinding and flotation equipment was added to the mill in 1935 and mining resumed underground (Smith, 1938). In 1938, the mine was de-watered at the 215-foot level (Reed, 1939). A 1200-foot-long surface trench was emplaced and drifting on the 165-foot level took place in 1938; no ore was produced in 1938 (Stewart, 1939). In December, 1940, the prospect was idle (Stewart, 1941).
In 1995, Placer Dome drilled a 1,113-foot core hole that intersected a 20-foot zone that contained 0.066 ounces of gold per ton (Freeman, 2008). The bottom of the hole contained lead-zinc mineralization associated with a stratabound(?) massive sulfide lenses in black chloritic schist. In 1998, Freegold Ventures Ltd., drilled a core hole about 900 feet west of the Newsboy shaft; it cut a 10-foot section that contained 0.096 ounce gold per ton and a 10-foot section that contained 0.065 ounce of gold per ton. Freeman suggests that the Newsboy vein and other nearby prospects are part of a northeast-trending 'vein swarm'. As of 2008, the Newsboy Mine was part of the Golden Summit project of Freegold Ventures Ltd.
The mine is in dark green, massive to tightly foliated chlorite-actinolite schist of basaltic origin. The country rocks trend N60-80E and dip 0 to 30NW (Robinson and others, 1990). The mine dumps indicate much of the mining was in quartz-biotite-mica schist and quartz-sericite schist with abundant white to granular, quartz stockwork and pervasive flood silica (Freeman, 1992). The deposit is on the Newsboy shear zone which features several generations of mainly strike-slip faulting with some dip-slip displacement. However, the dip-slip displacement is difficult to unravel due to the intensity and complexity of the movements (Freeman, 1992). The Newsboy shear zone is on the northwest limb of the Cleary antiform and is cut by a series of poorly understood, east-trending faults which predominantly dip 57-80N. These structures truncate the mineralization and despite several hundred feet of drilling and exploratory drifting, the continuation of the shear zone could not be located (Freeman, 1992).
Mineralization at the Newsboy Mine consists primarily of native gold plus arsenopyrite, some of it auriferous, with lesser amounts of stibnite, chalcopyrite, sphalerite and ubiquitous pyrite (Fairbanks Exploration Inc., unpublished report, 1986). The ore is similar to that at the nearby Tolovana Mine (LG110), about one mile east and 650 feet lower in elevation than the Newsboy shaft. Shear zones and stockworks with abundant white quartz are from 2 to 14 feet wide; they average about 4 to 5 feet wide in the upper 200 feet of workings (Hill, 1933; Stewart, 1931). The mineralization is probably mid-Cretaceous based on similarities to other deposits in the area (McCoy and others, 1997).
Samples collected in 1986 from the Newsboy Mine dumps contain high arsenic and gold coupled with erratic but generally low antimony and silver (Fairbanks Exploration Inc., unpublished report, 1986). Samples contain from 260 parts per billion (ppb) gold to 4.180 ounces of gold per ton. Sulfide-rich samples from mill concentrates and tailings near the old Newsboy mill contain much gold with abundant arsenopyrite and pyrite. Sulfide-rich mill concentrates contained from 1.433 to 3.377 ounces of gold per ton. The mill tailings contained 0.087 to 0.163 ounce of gold per ton (Fairbanks Exploration Inc., unpublished report, 1986). A significant amount of gold (810 to 5,700 ppb) was detected in quartz-sericite schist derived from rhyolite tuff and exhalite (Fairbanks Exploration Inc., unpublished report, 1986).
Geologic map unit (-147.476146749892, 65.055676243752)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c)
Mineral deposit model number 22c
Age of mineralization Probably mid-Cretaceous based on similarities with other deposits in the area (McCoy and others, 1997).
Alteration of deposit Quartz, sericite, and ankerite (Freeman, 1992).

Production and reserves

Workings or exploration
The Newsboy mine was first staked June 25, 1909 (Times Publishing Company, 1912). The Newsboy shear zone was traced for several hundred feet on the surface and additional claims were staked. In October, 1911, a 5-stamp Joshua Hendy Mill was erected (Brooks, 1912; Smith, 1913a and 1913b). The mill operated for only a few months due to lack of water. Brooks (1912) indicated that by mid-1911 the Newsboy Mine shaft had reached the 200-foot level and working drifts had been driven on the 60-foot and 115-foot levels. By the end of 1911 the bottom of the shaft was at the 315-foot level and drifting was being conducted on a 4-foot-wide shear zone on the 215-foot and 315-foot levels.
By May 12, 1912, the mill had been moved to placer claim #11 above Discovery on Cleary Creek, about 4,000 feet northeast of and 600 feet lower than the Newsboy Mine. Water for the mill was taken from a 100-foot-deep 6-inch well, located near the mill (Smith, 1913a and 1913b).
By 1913, the Newsboy Mine was being developed on the 60-, 115-, 168-, 215- and 315-foot levels. The 115-foot level extended 140 feet southwest and 100 feet northeast of the shaft and much of the ore between this level and the 168-foot level had been mined (Chapin, 1914). A few feet east of the shaft on the 115-foot level the shear zone was mined over a 14 foot width. The 315-foot level was accessed by 250 feet of drifts, but this level of the mine was flooded in 1913 (Chapin, 1914).
Surface trenching was conducted along the shear zone in 1923 but the mine was idle (Stewart, 1923). During 1931, renovation was completed on the mine and the old mill on upper Cleary Creek (Pilgrim, 1932; Smith, 1933a and 1933b), and the shaft was opened to the 160-foot level (Hill, 1933). In October, the nearly retrofitted mill burned to the ground. Development work continued in the mine and de-watering was begun in the lower mine levels (Pilgrim, 1932; Stewart, 1933; Hill, 1933).
In 1932, a diesel-powered 180-cubic-foot-capacity Sullivan compressor was installed at the mine. One-hundred and fifty tons of ore from above the 215-foot level was shipped seven miles to the Tom Gilmore Mill on Fairbanks Creek. The 215-foot level was reopened in 1932 and minor exploratory work was conducted in 1933 (Smith, 1934). The Newsboy mill was rebuilt in 1933. New grinding and flotation equipment was added to the mill in 1935 and mining resumed underground (Smith, 1938). In 1938, the mine was de-watered at the 215-foot level (Reed, 1939). A 1200-foot-long surface trench was emplaced and drifting on the 165-foot level took place in 1938; no ore was produced in 1938 (Stewart, 1939). In December, 1940, the prospect was idle (Stewart, 1941).
In 1995, Placer Dome drilled a 1,113-foot core hole (Freeman, 2008). In 1998, Freegold Ventures Ltd., drilled a core hole about 900 feet west of the Newsboy shaft;. As of 2008, the Newsboy Mine is part of the Golden Summit project of Freegold Ventures Ltd.
In 2012, Freegold collected 218 soil samples (Abrams and Giroux, 2013).
Indication of production Yes; small
Reserve estimates The following discussion of reserves is taken from Freeman (1992) and is based on analysis of old mine maps. Ore reserves blocked out between the 350-foot and 175-foot levels are estimated at 21,875 tons of ore and 10,937 tons of waste rock, with a resource of 21,875 ounces of gold in place. The estimated reserves along the Newsboy shear zone system are considerably larger. Based on the past production figures, an estimated 75 percent of the reserves will consist of 4 feet of shear zone in a 6 foot heading; the remaining 25 percent of the reserves are figured on a 14-feet -wide shear zone on 14 feet of heading. The reserves are based on free gold at a grade of 0.5 ounce of gold per ton. Sulfide-encapsulated fine gold is expected to contribute a significant amount to the total gold; however, since reliable figures on the average amount of sulfide-encapsulated gold are not available, no value is given to this form of gold in the geologic reserves. The adjusted total geologic reserves takes into account the 44,062 tons of ore and waste estimated to have been mined from the Newsboy shaft. Based on the above assumptions, the total geologic reserve of the Newsboy shear zone system to the 1200 level is 813,938 tons at a grade of 0.5 ounce of gold per ton. It should be noted that the reserves are hypothetical reserves and as such no dilution or recovery factors have been included in the calculations.
Production notes In May of 1911, the Newsboy Mine produced a 66 ton ore shipment which yielded $5008.20 in gold, or about 244 ounces of gold. An additional 7.5 tons of ore was shipped in 1911 to the Garden Island Mill in Fairbanks and was reported to contain $104 gold per ton (5 ounces of gold per ton) in free milling gold (Brooks, 1913; Smith, 1913). Drifting and mining continued at the Newsboy Mine in 1913 although no production figures for the year are available (Chapin, 1914). Despite production of nearly $150,000 worth of gold (7250 troy ounces), the mine was shut down in 1915. In 1932, 150 tons of ore from above the 215-foot level was shipped 7 miles to the Tom Gilmore Mill on Fairbanks Creek. The total estimated production from 175 feet to the surface is 35,937 tons of ore and 8,125 tons of waste from which 35,937 troy ounces of gold were recovered (Freeman, 1992).

References

MRDS Number A015425; A015426

References

Freeman, C.J., 1992, 1991 Golden Summit project final report, volume 2: Historical summary of lode mines and prospects in the Golden Summit project area, Alaska: Avalon Development Corp., 159 p. (Report held by Freegold Recovery Inc. USA, Vancouver, British Columbia).
Freeman, C.J., 2008, Executive summary report for the Golden Summit project, Fairbanks Mining District, Alaska: Unpublished Technical Report for Freegold Ventures Ltd., 112 p. (posted on www.sedar.com, March 31, 2008) http://www.sedar.com/GetFile.do?lang=EN&docClass=24&issuerNo=00004004&fileName=/csfsprod/data88/filings/01242796/00000001/k%3A%5CSedar%5Cfilings%5Clivework%5Cwkout%5C19016%5CCS_tech.pdf (as of December 23, 2014).
McCoy, Dan, Newberry, R.J., Layer, Paul, and others, 1997, Pluton-related gold deposits of Interior Alaska, in Goldfarb, R.J., and Miller, L.D., (editors): Economic Geology Monograph 9, p. 191-241.
Stewart, B.D., 1931, Report on cooperation between Territory of Alaska and the United States in making mining investigations: Alaska Territorial Department of Mines, Annual Report 1931.
Times Publishing Company, 1912, Tanana Magazine, Quartz Edition: Fairbanks, Alaska, Times Publishing Company, 76 p.
Reporters C.J. Freeman, J.R. Guidetti Schaefer (Avalon Development Corporation); D.J. Grybeck (Port Ludlow, WA); V.C. Zinno (Alaska Earth Sciences, Inc.)
Last report date 12/23/2014