Point Riou Occurrence (near Icy Bay), Yakataga Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Point Riou Occurrence (near Icy Bay) | Occurrence |
| Yakataga Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
59° 52' 36'' North , 141° 25' 19'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: This occurrence is on the present Gulf of Alaska shoreline, 1.2 miles southeast of Point Riou and the mouth of Icy Bay. The occurrence, in section 2, T. 24 S., R. 23 E., of the Copper River Meridian, is locality 6 of Cobb (1972 [MF 411]; 1979 [OF 79-1246]).
Geology: Thomas and Berryhill (1962) collected reconnaissance beach samples (IB004, IB006-010) from the Icy Bay area that contained trace to small amounts of magnetite, ilmenite, chromite, zircon, rutile, garnet, sphene, xenotime, and gold. The magnetic fraction of their samples contained as much as 6.2 pounds of iron and 1 pound of titanium oxide per cubic yard. The non-magnetic fraction contained as much as 6.4 pounds, but mostly less than 2 pounds, of titanium oxide per cubic yard. An auger sample of beach material collected by Thomas and Berryhill (1962) at this location contained 0.2 pound of titanium oxide per cubic yard in the magnetic fraction (which also contained 1.4 pounds of iron per cubic yard) and 1.5 pounds of titanium oxide per cubic yard in the non-magnetic fraction.
Workings: Reconnaissance characterization of beach samples has been completed in this area.
Age: Holocene.
Commodities (Major) - Au, Ti; (Minor) - Cr
Development Status: None
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a - beach)
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
8 valid minerals.
Detailed Mineral List:
| ⓘ Chromite Formula: Fe2+Cr3+2O4 |
| ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 |
| ⓘ Ilmenite Formula: Fe2+TiO3 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Native Gold Formula: Au |
| ⓘ Rutile Formula: TiO2 |
| ⓘ Titanite Formula: CaTi(SiO4)O |
| ⓘ Xenotime-(Y) Formula: Y(PO4) |
| ⓘ Zircon Formula: Zr(SiO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| ⓘ | Rutile | 4.DB.05 | TiO2 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Xenotime-(Y) | 8.AD.35 | Y(PO4) |
| Group 9 - Silicates | |||
| ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
| ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| Unclassified | |||
| ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Ilmenite | Fe2+TiO3 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Rutile | TiO2 |
| O | ⓘ Titanite | CaTi(SiO4)O |
| O | ⓘ Xenotime-(Y) | Y(PO4) |
| O | ⓘ Zircon | Zr(SiO4) |
| O | ⓘ Garnet Group | X3Z2(SiO4)3 |
| Si | Silicon | |
| Si | ⓘ Titanite | CaTi(SiO4)O |
| Si | ⓘ Zircon | Zr(SiO4) |
| Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
| P | Phosphorus | |
| P | ⓘ Xenotime-(Y) | Y(PO4) |
| Ca | Calcium | |
| Ca | ⓘ Titanite | CaTi(SiO4)O |
| Ti | Titanium | |
| Ti | ⓘ Ilmenite | Fe2+TiO3 |
| Ti | ⓘ Rutile | TiO2 |
| Ti | ⓘ Titanite | CaTi(SiO4)O |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | ⓘ Ilmenite | Fe2+TiO3 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Y | Yttrium | |
| Y | ⓘ Xenotime-(Y) | Y(PO4) |
| Zr | Zirconium | |
| Zr | ⓘ Zircon | Zr(SiO4) |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | IB004 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America Plate
- Middleton-Yakataga BasinBasin
- Yakutat-Malaspina DomainDomain
- YakutatOphiolite Complex
Pacific OceanOcean
Pacific PlateTectonic Plate
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