Stakholmen quarry, Hassela, Nordanstig, Gävleborg County, Swedeni
| Regional Level Types | |
|---|---|
| Stakholmen quarry | Quarry |
| Hassela | Town |
| Nordanstig | Municipality |
| Gävleborg County | County |
| Sweden | Country |
Stakholmen quarry, Hälsingland Province, Sweden
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Latitude & Longitude (WGS84):
62° 8' 19'' North , 16° 37' 8'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Hassela | 329 (2017) | 5.2km |
| Friggesund | 530 (2017) | 27.2km |
| Lucksta | 637 (2017) | 28.5km |
| Bergsjö | 1,292 (2017) | 28.9km |
| Nedansjö | 310 (2017) | 29.0km |
Mindat Locality ID:
15969
Long-form identifier:
mindat:1:2:15969:1
GUID (UUID V4):
4f3712c7-936a-48ce-ba03-423224764374
Quarried for quartzite in the 1970s.
Noted for fairly large prismatine crystals. Jonsson (1996) describes the occurrence:
Prismatine occurs at Stakholmen as elongated, rough, prismatic crystals of a generally grey or greyish white colour, more rarely green or purplish grey...In most of the investigated specimens, prismatine is intimately intergrown in a medium- to coarse-grained white or colourless to light tan mass mainly composed of subhedral sheaves of white enstatite, white, sheafy talc and a light brownish phlogopitic mica. Dravite, quartz and plagioclase occur as slightly less common constituents of this assemblage. In some samples, a disequilibrium texture with prismatine being rimmed by dravite is apparent. In most samples, however, dravite occurs as either disparate euhedral crystals, or as anhedral, blebby inclusions in kornerupine. Cordierite mostly occurs as grey to blue anhedral masses in an outer zone of the prismatine-bearing assemblage.
Not noted is that the prismatine fluoresces a nice yellow color, best under MW UV light, complemented by the enstatite that fluoresces light blue under SW and MW, weaker color under LW UV light.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Formula: Mg5(SiO4)2F2 Description: This entry was posted without any reference. No analysis of chondrodite has been found in publications or known among Swedish collectors so far (2016). Dravite occurs as a brown-yellowish mineral at Stakholmen, and it could be a misidentification. |
| ⓘ Columbite-(Mg) Formula: (Mg,Fe,Mn)(Nb,Ta)2O6 |
| ⓘ Cordierite Formula: (Mg,Fe)2Al3(AlSi5O18) Description: Jonsson (1996) says Cordierite mostly occurs as grey to blue anhedral masses in an outer zone of the prismatine-bearing assemblage. References: Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 |
| ⓘ Dravite Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) Description: Jonsson (1996) says "In most of the investigated specimens, prismatine is intimately intergrown in a medium- to coarse-grained white or colourless to light tan mass mainly composed of subhedral sheaves of white enstatite, white, sheafy talc and a light brownish phlogopitic mica. Dravite, quartz and plagioclase occur as slightly less common constituents of this assemblage. In some samples, a disequilibrium texture with prismatine being rimmed by dravite is apparent In most samples, however, dravite occurs as either disparate euhedral crystals, or as anhedral, blebby inclusions in komerupine." |
| ⓘ Enstatite Formula: Mg2Si2O6 Habit: subhedral sheaves Colour: white or colourless to light tan Fluorescence: light blue under SW and MW, nearly white and weaker under LW Description: Jonsson (1996) says "In most of the investigated specimens, prismatine is intimately intergrown in a medium- to coarse-grained white or colourless to light tan mass mainly composed of subhedral sheaves of white enstatite, white, sheafy talc and a light brownish phlogopitic mica. Dravite, quartz and plagioclase occur as slightly less common constituents of this assemblage. In some samples, a disequilibrium texture with prismatine being rimmed by dravite is apparent In most samples, however, dravite occurs as either disparate euhedral crystals, or as anhedral, blebby inclusions in kornerupine." References: Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 |
| ⓘ Phlogopite Formula: KMg3(AlSi3O10)(OH)2 Colour: light brown Description: Jonsson (1996) says "In most of the investigated specimens, prismatine is intimately intergrown in a medium- to coarse-grained white or colourless to light tan mass mainly composed of subhedral sheaves of white enstatite, white, sheafy talc and a light brownish phlogopitic mica. Dravite, quartz and plagioclase occur as slightly less common constituents of this assemblage." References: Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 Description: Jonsson (1996) says "In most of the investigated specimens, prismatine is intimately intergrown in a medium- to coarse-grained white or colourless to light tan mass mainly composed of subhedral sheaves of white enstatite, white, sheafy talc and a light brownish phlogopitic mica. Dravite, quartz and plagioclase occur as slightly less common constituents of this assemblage." References: Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 |
| ✪ Prismatine Formula: (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 Habit: Elongated rough, prismatic crystals arranged in divering aggregates or subparallell bundles Colour: Grey to greyish white Fluorescence: Yellow best under MW Description: Jonsson (1996) says "Prismatine occurs at Stakholmen as elongated, rough, prismatic crystals of a generally grey or greyish white colour, more rarely green or purplish grey. […] In most of the investigated specimens, prismatine is intimately intergrown in a medium- to coarse-grained white or colourless to light tan mass mainly composed of subhedral sheaves of white enstatite, white, sheafy talc and a light brownish phlogopitic mica. Dravite, quartz and plagioclase occur as slightly less common constituents of this assemblage. In some samples, a disequilibrium texture with prismatine being rimmed by dravite is apparent" References: Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 |
| ⓘ Quartz Formula: SiO2 Description: Jonsson (1996) says "In most of the investigated specimens, prismatine is intimately intergrown in a medium- to coarse-grained white or colourless to light tan mass mainly composed of subhedral sheaves of white enstatite, white, sheafy talc and a light brownish phlogopitic mica. Dravite, quartz and plagioclase occur as slightly less common constituents of this assemblage." References: Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 |
| ⓘ Sillimanite Formula: Al2(SiO4)O |
| ⓘ Talc Formula: Mg3Si4O10(OH)2 Habit: sheafy Colour: white Description: Jonsson (1996) says "In most of the investigated specimens, prismatine is intimately intergrown in a medium- to coarse-grained white or colourless to light tan mass mainly composed of subhedral sheaves of white enstatite, white, sheafy talc and a light brownish phlogopitic mica." References: Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 |
| ⓘ 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z References: Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Columbite-(Mg) | 4.DB.35 | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| Group 9 - Silicates | |||
| ⓘ | Sillimanite | 9.AF.05 | Al2(SiO4)O |
| ⓘ | Chondrodite ? | 9.AF.45 | Mg5(SiO4)2F2 |
| ⓘ | Prismatine | 9.BJ.50 | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| ⓘ | Cordierite | 9.CJ.10 | (Mg,Fe)2Al3(AlSi5O18) |
| ⓘ | Dravite | 9.CK.05 | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
| ⓘ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
| ⓘ | Phlogopite | 9.EC.20 | KMg3(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| H | ⓘ Talc | Mg3Si4O10(OH)2 |
| H | ⓘ Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| B | Boron | |
| B | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| B | ⓘ Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| O | Oxygen | |
| O | ⓘ Chondrodite | Mg5(SiO4)2F2 |
| O | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| O | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Enstatite | Mg2Si2O6 |
| O | ⓘ Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| O | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Sillimanite | Al2(SiO4)O |
| O | ⓘ Talc | Mg3Si4O10(OH)2 |
| O | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | ⓘ Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| F | Fluorine | |
| F | ⓘ Chondrodite | Mg5(SiO4)2F2 |
| F | ⓘ Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| Na | Sodium | |
| Na | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | ⓘ Chondrodite | Mg5(SiO4)2F2 |
| Mg | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Mg | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Mg | ⓘ Enstatite | Mg2Si2O6 |
| Mg | ⓘ Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| Mg | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Mg | ⓘ Talc | Mg3Si4O10(OH)2 |
| Mg | ⓘ Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| Al | Aluminium | |
| Al | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Al | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Al | ⓘ Sillimanite | Al2(SiO4)O |
| Al | ⓘ Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Chondrodite | Mg5(SiO4)2F2 |
| Si | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Si | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Enstatite | Mg2Si2O6 |
| Si | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Sillimanite | Al2(SiO4)O |
| Si | ⓘ Talc | Mg3Si4O10(OH)2 |
| Si | ⓘ Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| K | Potassium | |
| K | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mn | Manganese | |
| Mn | ⓘ Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| Fe | Iron | |
| Fe | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Fe | ⓘ Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| Fe | ⓘ Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| Nb | Niobium | |
| Nb | ⓘ Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| Ta | Tantalum | |
| Ta | ⓘ Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
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References
Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376
