McRoberts Creek Occurrence, Anchorage Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| McRoberts Creek Occurrence | Occurrence |
| Anchorage Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 35' 23'' North , 148° 59' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Lazy Mountain | 1,479 (2011) | 4.7km |
| Butte | 3,246 (2011) | 5.8km |
| Palmer | 6,788 (2017) | 6.7km |
| Farm Loop | 1,028 (2011) | 9.7km |
| Gateway | 5,552 (2011) | 13.4km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Mat-Su Rock and Mineral Club | Palmer, Alaska | 7km |
It appears that McRoberts Creek has also been referred to as Bodenburg Creek and Palmer Creek on various maps.
Location: Along McRoberts Creek: Sec. 6, T. 17 N., R. 3 E., of the Seward Meridian. Accurate within 1 mile. Locality 74 and 75 of Jasper (1967) and locality 91 of Cobb (1972).
Geology: Jasper (1967) reported creek float consisting of granite, greenstone and ultramafic rocks. Concentrates include: magnetite, scheelite, pyrite, ilmenite, and a trace of cinnabar.
Workings: Pan concentrates contain 50 to 60 percent magnetite, less than 1 percent scheelite, about 1 percent pyrite, a few grains of ilmenite, and 1 grain of cinnabar (Jasper, 1967).
Commodities (Major) - Hg, W
Development Status: None
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
4 valid minerals.
Detailed Mineral List:
| ⓘ Cinnabar Formula: HgS |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Scheelite Formula: Ca(WO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Scheelite | Ca(WO4) |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| S | ⓘ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | ⓘ Scheelite | Ca(WO4) |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Pyrite | FeS2 |
| W | Tungsten | |
| W | ⓘ Scheelite | Ca(WO4) |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
Other Databases
| Link to USGS - Alaska: | AN091 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Peninsular-Talkeetna DomainDomain
- Peninsular TerraneVolcanic Arc
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