Jumbo Prospect, Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Jumbo Prospect | Prospect |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 14' 23'' North , 149° 36' 36'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: The Jumbo prospect is at an elevation of about 2,200 feet on the south bank of the West Fork Chulitna River, about 0.5 mile from the junction of Bryn Mawr Creek. It is in sec. 26, T. 19 S., R. 11 E., of the Fairbanks Meridian. The location is accurate to within 1 mile. This is locality 7 of Cobb (1978: OFR 78-1062). According to Capps (1919), the Jumbo prospect adjoins the Riverside prospect (HE033).
Geology: Bunches and specks of sulfides, mainly pyrrhotite along with some pyrite and chalcopyrite, are disseminated in Triassic conglomerate adjacent to a porphyry dike. The dike is similar in composition to the Upper Cretaceous porphyry at the Golden Zone mine (HE043).
Workings: Only open-cut surface workings.
Age: Probably Late Cretaceous or younger.
Commodities (Major) - Cu
Development Status: None
Deposit Model: Cu porphyry (Cox and Singer, 1986; model 18a)
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:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | HE034 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Chulitna-Broad Pass DomainDomain
- Peninsular TerraneVolcanic Arc
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