Demons Bluff, Anglesea, Surf Coast Shire, Victoria, Australiai
| Regional Level Types | |
|---|---|
| Demons Bluff | - not defined - |
| Anglesea | - not defined - |
| Surf Coast Shire | Shire |
| Victoria | State |
| Australia | Country |
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Latitude & Longitude (WGS84):
38° 23' 51'' South , 144° 14' 16'' East
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Anglesea | 2,290 (2012) | 4.7km |
| Aireys Inlet | 713 (2013) | 13.8km |
| Grovedale | 14,308 (2017) | 24.0km |
| Wandana Heights | 1,831 (2015) | 25.3km |
| Highton | 17,793 (2017) | 26.0km |
Mindat Locality ID:
15595
Long-form identifier:
mindat:1:2:15595:0
GUID (UUID V4):
24dea7d3-2abf-4d23-8303-d2f0e6e7f5fd
Demons Bluff is approx. 2 km east of Anglesea.
Vivianite nodules up to 200mm across have been found here washed ashore from submarine outcrops of black carbonaceous and pyritic Anglesea Sand Beds. It is thought that the vivianite formation, sulphate reduction and precipitation of pyrite all require strongly reducing conditions, under which pyrite may simultaneously precipitate with phosphate.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Pyrite Formula: FeS2 References: |
| ⓘ Siderite Formula: FeCO3 Description: The siderite at Demons Bluff has been found as small (less than 0.5mm) tan colored, double terminated crystals on vivianite crystals inside the vivianite nodules. References: |
| ⓘ Vivianite Formula: Fe2+Fe2+2(PO4)2 · 8H2O Description: The vivianite nodules from Demons Bluff occur in 2 forms- crystalline and non-crystalline.
The crystalline nodules when opened are generally dark blue and have a crystalline structure radiating towards the centre. Some of these nodules have cavities towards the centre which are lined with dark blue green stubby crystals of vivianite usually no more than 3mm across.
The non-crystalline nodules (which are the most common form at Demons Bluff) are massive and compact and when first exposed to light can be very pale green-white. In time they turn darker blue/green. However polished specimens (which best display the patchy/mottled structure of the nodule) tend to hold the original colour. |
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Vivianite | 8.CE.40 | Fe2+Fe2+2(PO4)2 · 8H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Vivianite | Fe2+Fe22+(PO4)2 · 8H2O |
| C | Carbon | |
| C | ⓘ Siderite | FeCO3 |
| O | Oxygen | |
| O | ⓘ Siderite | FeCO3 |
| O | ⓘ Vivianite | Fe2+Fe22+(PO4)2 · 8H2O |
| P | Phosphorus | |
| P | ⓘ Vivianite | Fe2+Fe22+(PO4)2 · 8H2O |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Siderite | FeCO3 |
| Fe | ⓘ Vivianite | Fe2+Fe22+(PO4)2 · 8H2O |
Other Regions, Features and Areas containing this locality
Australia
- Lachlan OrogenOrogen
- Melbourne-Mathinna ZoneZone (Tectonic)
- Otway BasinBasin
- Torquay Sub-basinBasin
- Victoria
- Selwyn ProvinceGeologic Province
Australian PlateTectonic Plate
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References
