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Dahl Creek Head; Asbestos Mountain; Ing-Ink Mine, Ambler Mining District, Northwest Arctic Borough, Alaska, USAi
Regional Level Types
Dahl Creek Head; Asbestos Mountain; Ing-Ink MineMine
Ambler Mining DistrictMining District
Northwest Arctic BoroughBorough
AlaskaState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
67° 0' 32'' North , 156° 49' 29'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Kobuk158 (2017)11.6km
Shungnak273 (2017)19.1km


Location: Location is just northwest of Asbestos Mountain in T. 19 N., R. 9 E., Kateel River Meridian. Shown as locality 29 in Mayfield and Grybeck (1978). Location accurate to within 600 ft. (200 m).
Geology: 50 ft. (17 m) wide shear zone trending northeast and containing veins of slip-fiber tremolite, 6 in. to 2.5 ft. (12 cm to 0.66 m) thick; fibers up to 18-20 in. (36-40 cm) long, weak in tenacity, but relatively free of impurities. Veins plus residual fibers form lenticular ore bodies. Also present in area of mine are: 1) 0.25-4 in. (0.5-8 cm) seams of slip-fiber chrysotile and small veinlets of cross-fiber chrysotile; 2) small deposits of talc, soapstone and nephrite, 3) 6 in. (12 cm) wide veins of quartz containing crystals possibly of optical quality. Deposit is in serpentinized basic intrusive (peridotite?) in mica schist; abundant tremolite and chrysotile float (Heide and others, 1949, p.11-13).
Workings: Surface and underground. Explored by several trenches and a 229 ft. (76 m) adit.
Production: 33 tons of tremolite and 0.9 tons of serpentine shipped during WW ll. Small amount of optical quartz crystals shipped in 1943 (Heide and others, 1949, p. 11-13).

Commodities (Major) - Asbestos; (Minor) - Jade, talc
Development Status: Yes; small
Deposit Model: Serpentine-hosted asbestos

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


4 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Chrysotile
Formula: Mg3(Si2O5)(OH)4
Reference: U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
'Ferro-actinolite-Tremolite Series'
Reference: U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
Quartz
Formula: SiO2
Reference: U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
Talc
Formula: Mg3Si4O10(OH)2
Reference: U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
Tremolite
Formula: ◻{Ca2}{Mg5}(Si8O22)(OH)2
Reference: U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 9 - Silicates
Chrysotile9.ED.15Mg3(Si2O5)(OH)4
Talc9.EC.05Mg3Si4O10(OH)2
Tremolite9.DE.10◻{Ca2}{Mg5}(Si8O22)(OH)2
Unclassified Minerals, Rocks, etc.
'Ferro-actinolite-Tremolite Series'-

List of minerals for each chemical element

HHydrogen
H ChrysotileMg3(Si2O5)(OH)4
H TalcMg3Si4O10(OH)2
H Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2
OOxygen
O ChrysotileMg3(Si2O5)(OH)4
O TalcMg3Si4O10(OH)2
O Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2
O QuartzSiO2
MgMagnesium
Mg ChrysotileMg3(Si2O5)(OH)4
Mg TalcMg3Si4O10(OH)2
Mg Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2
SiSilicon
Si ChrysotileMg3(Si2O5)(OH)4
Si TalcMg3Si4O10(OH)2
Si Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2
Si QuartzSiO2
CaCalcium
Ca Tremolite◻{Ca2}{Mg5}(Si8O22)(OH)2

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Anderson, Eskil, 1945, Asbestos and jade occurrences in the Kobuk River region, Alaska: Alaska Territorial Department of Mines Pamphlet 3-R, 26 p. Anderson, Eskil, 1947, Mineral occurrences other than gold deposits in northwestern Alaska: Alaska Territorial Division of Mines Pamphlet 5-R, 48 p. Fritts, C.E., 1970, Geology and geochemistry of the Cosmos Hills, Ambler River and Shungnak River quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 39, 63 p., 4 sheets, scale 1:63,360. Heide, H.E., Wright, W.S., and Rutledge, F.A., 1949, Investigations of the Kobuk River asbestos deposits, Kobuk district, northwest Alaska: U.S. Bureau of Mines Report of Investigations 4414, 21 p. Mayfield, C.F., and Grybeck, D., 1978, Mineral occurrences and resource map of the Ambler River quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-120-I, 1 sheet, scale 1:250,000. Reed, I.M., 1931, Report on the placer deposits of the upper Kobuk goldfields: Alaska Territorial Department of Mines Miscellaneous Report 37-1, 57 p

Other Databases

Link to USGS - Alaska:AR016

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
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