Rokitki skarn/marble quarries, Gmina Przeworno, Strzelin County, Lower Silesian Voivodeship, Polandi
| Regional Level Types | |
|---|---|
| Rokitki skarn/marble quarries | Quarry (Inactive) |
| Gmina Przeworno | Gmina |
| Strzelin County | County |
| Lower Silesian Voivodeship | Voivodeship |
| Poland | Country |
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Latitude & Longitude (WGS84):
50° 42' 43'' North , 17° 7' 30'' East
Latitude & Longitude (decimal):
Type:
Quarry (Inactive) - last checked 2022
Age:
~635 to 541 ± 1.0 Ma
Geologic Time:
Köppen climate type:
Mindat Locality ID:
418622
Long-form identifier:
mindat:1:2:418622:2
GUID (UUID V4):
1e15ede5-88ad-4ad1-bb7b-6bea413e4c25
Other/historical names associated with this locality:
Kuhberge - Krummendorf, Landkreis Strehlen/łomy erlanów na Wzgórzu Rokitki
Other Languages:
German:
Kuhberge - Krummendorf, Powiat Strzeliński, Woiwodschaft Niederschlesien, Polen
The largest, compact zone of calcium-silicate rocks (see map in external link 'Photos 2016') in the Strzelin Massif, belonging to the older shale series of the Strzelina complex. These rocks are exposed at several points on the eastern slopes of Gromnik and Rokitki hills, also drilled in the GR 2 borehole (280 m deep) in the early 1980s. The total thickness of the calcium-silicate rocks is only about 140m within an area of approximately 2 km in length. The layer is poorly exposed (Oberc-Dziedzic T., Madej S. 2013).
The old, abandoned small calcium-silicate rocks quarry (in Poland also as erlans) on Rokitki Hill, located about 1.3 km NW from the village of Samborowiczki (Germ: Krummendorf). Calcium-silicate rocks can can be observed on the north and eastern walls of the quarry. Approx. 200m NE second small marble quarry. The mineral composition of the calcium-silicate rocks is fairly constant, but the percentage of minerals change from place to place:
- pyroxene (diopside) 34.5-44.7%,
- wollastonite 6.7-28.4%,
- plagioclase from trace amounts to 25.7%,
- quartz from 1.9 up to 6.7%
- calcite 2.0-11.8%.
The proportion of garnet (hessonite) that forms the grains of o the size of a few tenths of a millimeter ranges from 0 to 23.6%. Beige streaks signify that the rock is enriched in vesuvianite, and the brown flecks correspond larger crystals of this mineral (single vesuvianite crystals achieve a size of few centimeters). Accessory titanite, zircon, pyrite and apatite.
According to Wojnar (1995), calcium silicate rocks from Rokitki Hill were formed from limestone sediments and marls, enriched with certain levels in Ca, Al, Mg, Fe and silica, , these sediments were metamorphised in the conditions of regional metamorphism (erlans). Then minerals recrystallized in the conditions of contact metamorphism (skarns) associated with the intrusion of granitoids (Gromnik granite and tonalite).
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
9 valid minerals.
Detailed Mineral List:
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) |
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Diopside Formula: CaMgSi2O6 |
| ⓘ Grossular Formula: Ca3Al2(SiO4)3 |
| ⓘ Grossular var. Hessonite Formula: Ca3Al2(SiO4)3 |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Titanite Formula: CaTi(SiO4)O |
| ⓘ Vesuvianite Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| ⓘ Wollastonite Formula: Ca3(Si3O9) |
| ⓘ Zircon Formula: Zr(SiO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| ⓘ | Grossular | 9.AD.25 | Ca3Al2(SiO4)3 |
| ⓘ | var. Hessonite | 9.AD.25 | Ca3Al2(SiO4)3 |
| ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
| ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| ⓘ | Vesuvianite | 9.BG.35 | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
| ⓘ | Wollastonite | 9.DG.05 | Ca3(Si3O9) |
| Unclassified | |||
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Diopside | CaMgSi2O6 |
| O | ⓘ Grossular | Ca3Al2(SiO4)3 |
| O | ⓘ Grossular var. Hessonite | Ca3Al2(SiO4)3 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Titanite | CaTi(SiO4)O |
| O | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| O | ⓘ Wollastonite | Ca3(Si3O9) |
| O | ⓘ Zircon | Zr(SiO4) |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| F | Fluorine | |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Na | Sodium | |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | ⓘ Diopside | CaMgSi2O6 |
| Mg | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Al | Aluminium | |
| Al | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Al | ⓘ Grossular var. Hessonite | Ca3Al2(SiO4)3 |
| Al | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Diopside | CaMgSi2O6 |
| Si | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Si | ⓘ Grossular var. Hessonite | Ca3Al2(SiO4)3 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Titanite | CaTi(SiO4)O |
| Si | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Si | ⓘ Wollastonite | Ca3(Si3O9) |
| Si | ⓘ Zircon | Zr(SiO4) |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| P | Phosphorus | |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Diopside | CaMgSi2O6 |
| Ca | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Ca | ⓘ Grossular var. Hessonite | Ca3Al2(SiO4)3 |
| Ca | ⓘ Titanite | CaTi(SiO4)O |
| Ca | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Ca | ⓘ Wollastonite | Ca3(Si3O9) |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ti | Titanium | |
| Ti | ⓘ Titanite | CaTi(SiO4)O |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Zr | Zirconium | |
| Zr | ⓘ Zircon | Zr(SiO4) |
Other Regions, Features and Areas containing this locality
Czech Republic/Germany/Poland
- ⭔SilesiaRegion
Czech Republic/Poland
- Central SudetesMountain Range
Eurasian PlateTectonic Plate
EuropeContinent
- Bohemian Massif
- SudetesMountain Range
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References
