Hamekoski occurrence, Pitkyarantsky District, Republic of Karelia, Russiai
| Regional Level Types | |
|---|---|
| Hamekoski occurrence | Outcrop (Active) |
| Pitkyarantsky District | District |
| Republic of Karelia | Republic |
| Russia | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
61° 49' 30'' North , 30° 55' 59'' East
Latitude & Longitude (decimal):
Type:
Outcrop (Active) - last checked 2022
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Kharlu | 3,200 (2016) | 2.9km |
| Yanis’yarvi | 3,000 (2012) | 7.4km |
| Lyaskelya | 3,571 (2016) | 7.9km |
| Khelyulya | 3,082 (2012) | 16.4km |
| Sortavala | 20,760 (2016) | 17.2km |
Other/historical names associated with this locality:
Hemiakoski
On the slope of the hill there are rock ledges, 1.5-2.5 m high, composed of staurolite-andalusite biotite schists, which form the upper subformation of the Pyalk-Yarvinskaya suite (Ladoga series). They are traced for 300 m to the watershed of the mountain, which is a rocky dome-shaped outcrop of the same schists. At present, it is mostly covered with reindeer moss and lichens, but with minimal effort it can be exposed. A large-porphyroblastic structure of schists is observed, due to andalusite porphyroblasts up to 3-4 cm in size, their shape is mostly oval or close to rectangular. Colour is light grey.
Staurolite has a prismatic shape, sometimes "crosses" are observed. The size of the crystals is 1.0-1.5 x 0.5-0.7 cm. The strike azimuth of the schistosity is NW 350°. There is also a fine corrugation of schistosity. Shearing is noted in the groundmass of the rock and even in andalusite porphyroblasts.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
2 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:
| ⓘ Andalusite Formula: Al2(SiO4)O |
| ⓘ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| ⓘ Staurolite Formula: Fe2+2Al9Si4O23(OH) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Andalusite | 9.AF.10 | Al2(SiO4)O |
| ⓘ | Staurolite | 9.AF.30 | Fe2+2Al9Si4O23(OH) |
| Unclassified | |||
| ⓘ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
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 | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
| O | Oxygen | |
| O | ⓘ Andalusite | Al2(SiO4)O |
| O | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
| 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 | ⓘ Andalusite | Al2(SiO4)O |
| Al | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
| Si | Silicon | |
| Si | ⓘ Andalusite | Al2(SiO4)O |
| Si | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
| K | Potassium | |
| K | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)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 |
| Fe | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
Other Regions, Features and Areas containing this locality
Eurasian PlateTectonic Plate
- Baltic Shield
- Karelia CratonCraton
EuropeContinent
Soviet Union (1922-1991)Country
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
Hamekoski occurrence, Pitkyarantsky District, Republic of Karelia, Russia