Mashel River Mercury Prospect, Pierce County, Washington, USAi
| Regional Level Types | |
|---|---|
| Mashel River Mercury Prospect | Prospect |
| Pierce County | County |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° 52' 0'' North , 122° 5' 58'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Eatonville | 2,900 (2017) | 12.7km |
| Ashford | 217 (2011) | 13.1km |
| Alder | 227 (2011) | 16.2km |
| Kapowsin | 333 (2011) | 16.3km |
| La Grande | 109 (2011) | 17.0km |
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 |
|---|---|---|
| Puyallup Valley Gem & Mineral Club | Puyallup, Washington | 38km |
A small mercury prospect on the north side of the Mashel River.
Structure: Ne Trending Quartz Vein
Alteration: Andesite Adjacent To Quartz Vein Is Bleached And Locally Contains Abundant Fine-Grained Pyrite
Tectonics: Cascade Volcanic Arc
Commodity: Four diamond drill holes failed to find economic quantities of cinnabar beneath outcrop.
Deposit: Huntting gives ore body dimensions As 100 x 100 x 20 ft; unclear where puffett's data came from. Cinnabar occurs As thin films on fracture surfaces and As encrustations on nodular quartz that lines openings. Mrds record m054862 has been merged with this record and deleted
Deposit type: Epithermal vein, Sado
Development: Owner information from r.p. Ashley, oral commun., 1994 - not found in references. Diamond drilling proved the outcropping quartz vein at depth is zone of silicified andesite that contains only sparse cinnabar. Realgar and orpiment are abundant in unsilicified parts of andesite where cut by drill holes.
Ore(s): Fractures
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
5 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 DiagramDetailed Mineral List:
| ⓘ Cinnabar Formula: HgS Habit: druse and cavity filling |
| ⓘ 'Limonite' |
| ⓘ Orpiment Formula: As2S3 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Realgar Formula: As4S4 |
| ⓘ Stibnite Formula: Sb2S3 |
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| ⓘ | Stibnite | 2.DB.05 | Sb2S3 |
| ⓘ | Realgar | 2.FA.15a | As4S4 |
| ⓘ | Orpiment | 2.FA.30 | As2S3 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| S | ⓘ Orpiment | As2S3 |
| S | ⓘ Realgar | As4S4 |
| S | ⓘ Stibnite | Sb2S3 |
| As | Arsenic | |
| As | ⓘ Orpiment | As2S3 |
| As | ⓘ Realgar | As4S4 |
| Sb | Antimony | |
| Sb | ⓘ Stibnite | Sb2S3 |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
Other Databases
| Link to USGS MRDS: | 10042383 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Cascade RangeMountain Range
North America PlateTectonic Plate
- Cascade ArcVolcanic Arc
- Franciscan DomainDomain
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Mashel River Mercury Prospect, Pierce County, Washington, USA