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Last Hope Mine (Last Hope Mica Mine), Coggan Bore, Ambalindum Station, Harts Range, Central Desert Region, Northern Territory, Australiai
| Regional Level Types | |
|---|---|
| Last Hope Mine (Last Hope Mica Mine) | Mine |
| Coggan Bore | - not defined - |
| Ambalindum Station | - not defined - |
| Harts Range | Mountain Range |
| Central Desert Region | Region |
| Northern Territory | Territory |
| Australia | Country |
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Latitude & Longitude (WGS84):
23° 12' 9'' South , 135° 21' 42'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Pegmatite mine. Located approximately 3 kilometres north-east of Coggan Bore. Head east a short distance down the fence line from Coggan Bore, and at the end of this on a track north-east. It would appear this small abandoned mica mine has a limited footprint. PNC Exploration in 1994 could not locate the mine, and they comment the mine could be mis-placed on maps. According to production records it was only operational for two years; 1947 1743 lbs, and 1948 1215 lbs of mica.
The mine was owned and operated by Joe Dalmaso. The mine is on the south slope of a steep ridge, once consisting of two shafts down to 50 feet deep, three short tunnels, and a few small open cuts. The northern hanging wall of the pegmatite is covered by thin mica sheets. The pegmatite dips steeply north.
Noted for small concentrations of disseminated coarsely crystalline monazite, and the ill-defined mineral stated as betafite at the location. Monazite is pale yellow to dark red-brown, while the betafite is greenish black or dark brown, altering to yellow when exposed to weathering.
The mine was owned and operated by Joe Dalmaso. The mine is on the south slope of a steep ridge, once consisting of two shafts down to 50 feet deep, three short tunnels, and a few small open cuts. The northern hanging wall of the pegmatite is covered by thin mica sheets. The pegmatite dips steeply north.
Noted for small concentrations of disseminated coarsely crystalline monazite, and the ill-defined mineral stated as betafite at the location. Monazite is pale yellow to dark red-brown, while the betafite is greenish black or dark brown, altering to yellow when exposed to weathering.
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
2 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 References: |
| ⓘ 'Feldspar Group' |
| ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 References: |
| ⓘ 'Monazite Group' Formula: REE(PO4) References: |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 References: |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| ⓘ | 'Feldspar Group' | - | |
| ⓘ | 'Monazite Group' | - | REE(PO4) |
| ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | Oxygen | |
| O | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | ⓘ Monazite Group | REE(PO4) |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Garnet Group | X3Z2(SiO4)3 |
| F | Fluorine | |
| F | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Mg | Magnesium | |
| Mg | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | Aluminium | |
| Al | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
| P | Phosphorus | |
| P | ⓘ Monazite Group | REE(PO4) |
| K | Potassium | |
| K | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Ti | Titanium | |
| Ti | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | Iron | |
| Fe | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Other Regions, Features and Areas containing this locality
Australia
- Arunta OrogenOrogen
- Irindina ProvinceGeologic Province
- North Australian ElementCraton
- Northern Territory
- Kalkarindji Igneous ProvinceGeologic Province
Australian PlateTectonic Plate
- Arunta BlockOrogenic Belt
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