Overntjern Quarry, Overntjern, Modum, Viken, Norwayi
| Regional Level Types | |
|---|---|
| Overntjern Quarry | Quarry |
| Overntjern | Lake |
| Modum | Municipality |
| Viken | County |
| Norway | Country |
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Key
Latitude & Longitude (WGS84):
59° 57' 2'' North , 9° 51' 58'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Vikersund | 2,448 (2016) | 7.2km |
| Nakkerud | 350 (2013) | 15.1km |
| Prestfoss | 465 (2014) | 16.5km |
| Tyristrand | 795 (2013) | 19.7km |
| Krøderen | 496 (2013) | 19.9km |
Other/historical names associated with this locality:
Overngruve
Other Languages:
Norwegian:
Overntjern gruve, Overntjern, Modum, Viken, Norge
A serpentine-magnesite deposit quarried for magnesite and serpentine.
Now abandoned.
The name Overntjern is often used for the quarry (Overngruve), although Overntjern is, in fact, a small, unmined serpentinite outcrop nearby (close to the track leading to the Overngruve).
Select Mineral List Type
Standard Detailed Gallery Strunz Dana Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
11 valid minerals.
Detailed Mineral List:
| ⓘ Althausite Formula: Mg4(PO4)2(OH,O)(F,◻) Reference: Raade, G. & Tyssedal, M. (1975): Althausite, a new mineral from Modum, Norway. LITHOS 8, 215-219; Rømming, C. & Raade, G.(1980): The crystal structure of Althausite. American Mineralogist, 65, 488-498 |
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) Colour: brown Reference: Rømming, C. & Raade, G.(1980): The crystal structure of Althausite. American Mineralogist, 65, 488-498 |
| ⓘ Brucite Formula: Mg(OH)2 Reference: Nordrum, F.S. (2006): Nyfunn av mineraler i Norge 2005-2006. Norsk Bergverksmuseum Skrift. 33: 56-62 |
| ⓘ Clinochlore Formula: Mg5Al(AlSi3O10)(OH)8 Reference: Knut Edvard Larsen collection |
| ⓘ Clinochlore var. Leuchtenbergite Formula: Mg5Al(AlSi3O10)(OH)8 Reference: Knut Edvard Larsen collection |
| ⓘ Collinsite Formula: Ca2Mg(PO4)2 · 2H2O Description: As replacement of reddish althausite. Reference: Chopin, C., Ferraris,G..Prencipe, M., Brunet, F. and Medenbach, O. (2001): Raadeite, Mg7(PO4)2(OH)8: a new dense-packed phosphate from Modum (Norway). European Journal of Mineralogy. 13: 319-327. |
| ⓘ Dolomite Formula: CaMg(CO3)2 Reference: Witsø, T. (1994): Sjelden dolomitt fra Overntjern. STEIN 21 (3), 193 |
| ⓘ Enstatite Formula: Mg2Si2O6 Reference: Rømming, C. & Raade, G.(1980): The crystal structure of Althausite. American Mineralogist, 65, 488-498 |
| ⓘ Hematite Formula: Fe2O3 Reference: Uwe Kolitsch (SXRD-analysis) |
| ⓘ Magnesite Formula: MgCO3 Habit: massive cleavages Colour: white, pale pink Reference: Jøsang, Ottar (1966): Geologiske og petrologiske undersøkelser i Modumfeltet. Norges Geologiske Undersøkelse nr 235, 91-97 |
| ⓘ Phosphoellenbergerite Formula: (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 Reference: Knut Eldjarn; Nordrum, F.S. (2000). Nyfunn av mineraler i Norge 1999-2000. Bergverksmuseets Skrift 17:59-63 |
| ⓘ Pyrope Formula: Mg3Al2(SiO4)3 Reference: Nordrum, F.S. (2006): Nyfunn av mineraler i Norge 2005-2006. Norsk Bergverksmuseum Skrift. 33: 56-62 |
| ⓘ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn Reference: Jøsang, Ottar (1966): Geologiske og petrologiske undersøkelser i Modumfeltet. Norges Geologiske Undersøkelse nr 235, 91-97 |
| ⓘ Talc Formula: Mg3Si4O10(OH)2 Reference: Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Brucite | 4.FE.05 | Mg(OH)2 |
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| ⓘ | Magnesite | 5.AB.05 | MgCO3 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Althausite | 8.BB.25 | Mg4(PO4)2(OH,O)(F,◻) |
| ⓘ | Collinsite | 8.CG.05 | Ca2Mg(PO4)2 · 2H2O |
| ⓘ | Phosphoellenbergerite | 8.BB.55 | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| Group 9 - Silicates | |||
| ⓘ | Clinochlore | 9.EC.55 | Mg5Al(AlSi3O10)(OH)8 |
| ⓘ | var. Leuchtenbergite | 9.EC.55 | Mg5Al(AlSi3O10)(OH)8 |
| ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
| ⓘ | Pyrope | 9.AD.25 | Mg3Al2(SiO4)3 |
| ⓘ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
List of minerals arranged by Dana 8th Edition classification
| Group 4 - SIMPLE OXIDES | |||
|---|---|---|---|
| A2X3 | |||
| ⓘ | Hematite | 4.3.1.2 | Fe2O3 |
| Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL | |||
| X(OH)2 | |||
| ⓘ | Brucite | 6.2.1.1 | Mg(OH)2 |
| Group 14 - ANHYDROUS NORMAL CARBONATES | |||
| A(XO3) | |||
| ⓘ | Magnesite | 14.1.1.2 | MgCO3 |
| AB(XO3)2 | |||
| ⓘ | Dolomite | 14.2.1.1 | CaMg(CO3)2 |
| Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES | |||
| AB2(XO4)2·xH2O | |||
| ⓘ | Collinsite | 40.2.2.3 | Ca2Mg(PO4)2 · 2H2O |
| Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN | |||
| A2(XO4)Zq | |||
| ⓘ | Althausite | 41.6.5.1 | Mg4(PO4)2(OH,O)(F,◻) |
| Group 51 - NESOSILICATES Insular SiO4 Groups Only | |||
| Insular SiO4 Groups Only with cations in [6] and >[6] coordination | |||
| ⓘ | Pyrope | 51.4.3a.1 | Mg3Al2(SiO4)3 |
| Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1) | |||
| Single-Width Unbranched Chains, W=1 with chains P=2 | |||
| ⓘ | Enstatite | 65.1.2.1 | Mg2Si2O6 |
| Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings | |||
| Sheets of 6-membered rings with 2:1 layers | |||
| ⓘ | Talc | 71.2.1.3 | Mg3Si4O10(OH)2 |
| Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra | |||
| ⓘ | Clinochlore | 71.4.1.4 | Mg5Al(AlSi3O10)(OH)8 |
| Unclassified Minerals, Mixtures, etc. | |||
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
| ⓘ | Clinochlore var. Leuchtenbergite | - | Mg5Al(AlSi3O10)(OH)8 |
| ⓘ | Phosphoellenbergerite | - | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Althausite | Mg4(PO4)2(OH,O)(F,◻) |
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| H | ⓘ Clinochlore var. Leuchtenbergite | Mg5Al(AlSi3O10)(OH)8 |
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
| H | ⓘ Talc | Mg3Si4O10(OH)2 |
| H | ⓘ Collinsite | Ca2Mg(PO4)2 · 2H2O |
| H | ⓘ Phosphoellenbergerite | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| H | ⓘ Brucite | Mg(OH)2 |
| H | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| C | Carbon | |
| C | ⓘ Magnesite | MgCO3 |
| C | ⓘ Phosphoellenbergerite | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Althausite | Mg4(PO4)2(OH,O)(F,◻) |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| O | ⓘ Clinochlore var. Leuchtenbergite | Mg5Al(AlSi3O10)(OH)8 |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
| O | ⓘ Enstatite | Mg2Si2O6 |
| O | ⓘ Talc | Mg3Si4O10(OH)2 |
| O | ⓘ Magnesite | MgCO3 |
| O | ⓘ Collinsite | Ca2Mg(PO4)2 · 2H2O |
| O | ⓘ Phosphoellenbergerite | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Brucite | Mg(OH)2 |
| O | ⓘ Pyrope | Mg3Al2(SiO4)3 |
| O | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| F | Fluorine | |
| F | ⓘ Althausite | Mg4(PO4)2(OH,O)(F,◻) |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Mg | Magnesium | |
| Mg | ⓘ Althausite | Mg4(PO4)2(OH,O)(F,◻) |
| Mg | ⓘ Clinochlore var. Leuchtenbergite | Mg5Al(AlSi3O10)(OH)8 |
| Mg | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
| Mg | ⓘ Enstatite | Mg2Si2O6 |
| Mg | ⓘ Talc | Mg3Si4O10(OH)2 |
| Mg | ⓘ Magnesite | MgCO3 |
| Mg | ⓘ Collinsite | Ca2Mg(PO4)2 · 2H2O |
| Mg | ⓘ Phosphoellenbergerite | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | ⓘ Brucite | Mg(OH)2 |
| Mg | ⓘ Pyrope | Mg3Al2(SiO4)3 |
| Mg | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| Al | Aluminium | |
| Al | ⓘ Clinochlore var. Leuchtenbergite | Mg5Al(AlSi3O10)(OH)8 |
| Al | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
| Al | ⓘ Pyrope | Mg3Al2(SiO4)3 |
| Al | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| Si | Silicon | |
| Si | ⓘ Clinochlore var. Leuchtenbergite | Mg5Al(AlSi3O10)(OH)8 |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
| Si | ⓘ Enstatite | Mg2Si2O6 |
| Si | ⓘ Talc | Mg3Si4O10(OH)2 |
| Si | ⓘ Pyrope | Mg3Al2(SiO4)3 |
| Si | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| P | Phosphorus | |
| P | ⓘ Althausite | Mg4(PO4)2(OH,O)(F,◻) |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| P | ⓘ Collinsite | Ca2Mg(PO4)2 · 2H2O |
| P | ⓘ Phosphoellenbergerite | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ca | Calcium | |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ca | ⓘ Collinsite | Ca2Mg(PO4)2 · 2H2O |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Mn | Manganese | |
| Mn | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
| Fe | Iron | |
| Fe | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
| Fe | ⓘ Hematite | Fe2O3 |
| Ni | Nickel | |
| Ni | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
| Zn | Zinc | |
| Zn | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Jøsang, O. (1966) Geologiske og petrologiske undersøkelser i Modumfeltet. Norges Geologiske Undersøkelse nr 235, 91-97.
Rømming, C. and Raade, G. (1980) The crystal structure of Althausite. American Mineralogist, 65, 488-498.
Witsø, T. (1994) Sjelden dolomitt fra Overntjern. STEIN 21 (3), 193.
Raade, G. (1999) Et unikt mineralselskap av magnesiumfosfater fra magnesitt-serpentin-forekomster på Modum. Bergverksmuseets Skrift nr 15, 10-14 [in Norwegian].
Nordrum, F.S. (2000) Nyfunn av mineraler i Norge 1999-2000. Bergverksmuseets Skrift 17:59-63 [on a find of phosphoellenbergerite].
Nordrum, F.S. (2006) Nyfunn av mineraler i Norge 2005-2006. Norsk Bergverksmuseum Skrift. 33: 56-62.
Raade, G. (2011) A metamict, thorium-rich magnesium phosphate from Overntjern, Modum, Norway. Norsk Bergverksmuseum Skrift. 46: 33-36.
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Overntjern Quarry, Overntjern, Modum, Viken, Norway