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Unnamed Occurrences (ARDF - MZ009; south of VABM Flat), Melozitna Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrences (ARDF - MZ009; south of VABM Flat) | - not defined - |
| Melozitna Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 39' 39'' North , 153° 59' 2'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: Several occurrences of iron-stained felsic intrusive rock are on a half-mile-long section of ridge due south of hill 3214 (VABM Flat). The site corresponds to ADGGS station 92DNS158 (Solie and others, 1993 [Public-Data File 93-33]). It is at an elevation of 1,700 feet, 0.2 mile southeast of the center of section 13, T. 3 N., R. 23 E., Kateel River Meridian. The location is accurate.
Geology: The rocks in the vicinity of these occurrences are part of a northeast-trending stock about a mile wide of fine- to medium-grained hornblende-biotite granodiorite (Patton and others, 1977). Patton and others (1977) correlate the granodiorite with the Upper Cretaceous Dulbatna Mountain pluton, dated by K-Ar methods at 82.3 +/-3 Ma (biotite) and 90.0 +/3 Ma (hornblende). The granodiorite intrudes and thermally alters Lower Cretaceous quartz-pebble conglomerate and quartzose sandstone just south of the occurrences, and andesitic and dacitic tuff, agglomerate, breccia, and tuffaceous graywacke about 1 mile to the north. The Alaska Division of Geological and Geophysical Surveys collected 4 samples along the crest of a short ridge south of VABM Flat. Two samples of iron-stained felsic intrusive rock with sparse malachite were analyzed (Solie and others, 1993 [Public-Data File 93-33]). They contained up to 121 parts per million (ppm) arsenic, 120 parts per billion (ppb) gold, 1,185 ppm copper, 56 ppm molybdenum, 186 ppm lead, 16 ppm antimony, 11 ppm tin, and 15 ppm tungsten.
Workings: Only limited sampling by the Alaska Division of Geological and Geophysical Surveys.
Age: Upper Cretaceous or younger based on the age of the host rocks.
Alteration: Country rocks are thermally metamorphosed.
Commodities (Major) - Au, Cu; (Minor) - As, Mo, Pb, Sb, W
Development Status: None
Deposit Model: Sn veins (Cox and Singer, 1986; model 15b), Porphyry Sn (Cox and Singer, 1986;
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 5 - Nitrates and Carbonates | |||
|---|---|---|---|
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | Copper | |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | MZ009 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Koyukuk-Indian Mountain DomainDomain
- Koyukuk ArcsVolcanic Arc
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