Dahl Creek Head; Asbestos Mountain; Ing-Ink Mine, Ambler Mining District, Northwest Arctic Borough, Alaska, USAi
Regional Level Types | |
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Dahl Creek Head; Asbestos Mountain; Ing-Ink Mine | Mine |
Ambler Mining District | Mining District |
Northwest Arctic Borough | Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
67° 0' 32'' North , 156° 49' 29'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
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
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Standard Detailed Gallery Strunz Chemical ElementsCommodity 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!
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Alphabetical List Tree DiagramDetailed 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 | |||
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ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 9 - Silicates | |||
ⓘ | Chrysotile | 9.ED.15 | Mg3(Si2O5)(OH)4 |
ⓘ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
ⓘ | Tremolite | 9.DE.10 | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
Unclassified Minerals, Rocks, etc. | |||
ⓘ | 'Ferro-actinolite-Tremolite Series' | - |
List of minerals for each chemical element
H | Hydrogen | |
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H | ⓘ Chrysotile | Mg3(Si2O5)(OH)4 |
H | ⓘ Talc | Mg3Si4O10(OH)2 |
H | ⓘ Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
O | Oxygen | |
O | ⓘ Chrysotile | Mg3(Si2O5)(OH)4 |
O | ⓘ Talc | Mg3Si4O10(OH)2 |
O | ⓘ Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
O | ⓘ Quartz | SiO2 |
Mg | Magnesium | |
Mg | ⓘ Chrysotile | Mg3(Si2O5)(OH)4 |
Mg | ⓘ Talc | Mg3Si4O10(OH)2 |
Mg | ⓘ Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
Si | Silicon | |
Si | ⓘ Chrysotile | Mg3(Si2O5)(OH)4 |
Si | ⓘ Talc | Mg3Si4O10(OH)2 |
Si | ⓘ Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
Si | ⓘ Quartz | SiO2 |
Ca | Calcium | |
Ca | ⓘ Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
References
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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 |
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Other Regions, Features and Areas containing this locality
North America
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Brooks Range DomainDomain
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