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Tingelstadtjern Quarry, Modum, Buskerud, Norway

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Magnesite/serpentine deposit.

Years after the magnesite mining ended, serpentinite (partly intergrown with reddish magnesite) was taken from the dumps and used as decorative stones, in tables, etc.



References:
- Jøsang, Ottar (1966): Geologiske og petrologiske undersøkelser i Modumfeltet. Norges Geologiske Undersøkelse nr 235, 91-97.

- Raade, G. (1975): Althausite, a new mineral from Modum, Norway. LITHOS 8, 215-219.

- Raade, G. & Mladeck, M. H. (1979): Holtedahlite, a new magnesium phospate from Modum, Norway. LITHOS 12, 283-287.

- Rømming, C. & Raade, G. (1980): The crystal structure of Althausite. American Mineralogist, 65, 488-498.

- Raade, G., Mladeck, M. H. & Din, V.K. (1986): Heneuite, CaMg5(CO3)(PO4)3(OH), a new mineral from Modum, Norway. N. Jb. Miner. Mh. H. 8, 343-350.

- Rømming, C. & Raade, G. (1989): The crystal structure of natural and synthetic Holtedahlite. Mineralogy and Petrology 40: 91-100.

- Raade, G. (1999): Et unikt mineralselskap av magnesiumfosfater fra magnesitt-serpentin-forekomster på Modum. Bergverksmuseets Skrift nr 15, 10-14 [in norwegian].

- Kristiansen, R. (2001): Raadeitt- enda et nytt magnesiumfosfat fra Modum. STEIN 28 (4), 6-7.

- Larsen, K.E. (2007): Mineralportrettet: Althausitt Mg2(PO4)(OH,F,O). STEIN 34 (4), 28.





Mineral List:
  		•  Althausite (TL)
    Mg
     
    2
    		[(OH,F)|PO
     
    4
    		]
    Type Locality: Tingelstadtjern Quarry, Modum, Buskerud, Norway
    Colour: light grey
    Description: As cleavable masses in phospate nodules in serpentine
    Reference: [Raade, G. (1975): Althausite, a new mineral from Modum, Norway. LITHOS 8, 215-219 ; AmMin 86:1536]
    Site Photo
    Tingelstadtjern Quarry, Modum, Buskerud, Norway
    © K.E.Larsen
  		•  'Apatite'
    Description: Raade & Mladeck (1979)mention two kinds of coexsiting apatites at Tingelstadtjern; one being dominated by Cl,a nd the other by (OH,F).
    Reference: [Raade & Mladeck (1979, p. 283); Neumann (1985, p. 122); [AmMin 86:1536]
  		•  Apatite-(CaCl)
    Ca
     
    5
    		[Cl|(PO
     
    4
    		)
     
    3
    		]
    Description: described by raade & Mladeck (1979) as a apatite dominated by Cl; later by Raade, Mladeck & Din as Cl- bearing apatite
    Reference: [Raade & Mladeck (1979, p. 283); Neumann (1985, p. 123).]
  		•  Apatite-(CaOH)
    Ca
     
    5
    		[OH|(PO
     
    4
    		)
     
    3
    		]
    Reference: [Raade, G. (1999): Et unikt mineralselskap av magnesiumfosfater fra magnesitt-serpentin-forekomster på Modum. Bergverksmuseets Skrift nr 15, 10-14 [in norwegian]
  		•  Chrysotile
    Mg
     
    3
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
    Reference: [No reference listed]
  		•  Clinochlore
    var: Leuchtenbergite
    Reference: []
  		•  Dolomite
    CaMg(CO
     
    3
    		)
     
    2
    Reference: [No reference listed]
  		•  Hematite
    Fe
     
    2
    		O
     
    3
    Reference: [No reference listed]
  		•  Heneuite (TL)
    CaMg
     
    5
    		(CO
     
    3
    		)(PO
     
    4
    		)
     
    3
    		OH
    Type Locality: Tingelstadtjern Quarry, Modum, Buskerud, Norway
    Habit: nodular masses several cm across
    Colour: pale bluegreen
    Description: often surrounded by a rim of althausite which is surrounded by apatite
    Reference: [AmMin 86:1536]; Raade, G., Mladeck, M. H. & Din, V.K. (1986): Heneuite, CaMg5(CO3)(PO4)3(OH), a new mineral from Modum, Norway. N. Jb. Miner. Mh. H. 8, 343-350]
    Site Photo
    Tingelstadtjern Quarry, Modum, Buskerud, Norway
    © Peter Andresen
  		•  Holtedahlite (TL)
    Mg
     
    2
    		[OH|PO
     
    4
    		]
    Type Locality: Tingelstadtjern Quarry, Modum, Buskerud, Norway
    Habit: irregular patches ; masses
    Colour: colourless
    Description: glassy.
    Reference: [Raade, G. (1979): Holtedahlite, a new magnesium phospate from Modum, Norway. LITHOS 12, 283-287 + [AmMin 86:1536]
    Site Photo
    Tingelstadtjern Quarry, Modum, Buskerud, Norway
    © Trinity Minerals
  		•  Hydromagnesite
    Mg
     
    5
    		[(CO
     
    3
    		)
     
    4
    		(OH)
     
    2
    		] · 4H
     
    2
    		O
    Description: Occure as white crusts on serpentine.
    Reference: [Raade (1970, pers. com.); Neumann (1985, p. 102).]
  		•  Lizardite
    Mg
     
    3
    		[(OH)
     
    4
    		|Si
     
    2
    		O
     
    5
    		]
    Reference: [Knut Eldjarn]
  		•  Magnesite
    MgCO
     
    3
    Reference: [Jøsang, Ottar (1966): Geologiske og petrologiske undersøkelser i Modumfeltet. Norges Geologiske Undersøkelse nr 235, 91-97]
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Habit: as microscopic inclusions in althausite
    Reference: [Raade, G. (1975): Althausite, a new mineral from Modum, Norway. LITHOS 8, 215-219]
  		•  Phosphoellenbergerite
    Mg
     
    14
    		[(OH)
     
    6
    		|(HPO
     
    4
    		,CO
     
    3
    		)
     
    2
    		|(PO
     
    4
    		)
     
    6
    		]
    Reference: [Raade, G., Rømming, C., Medenbach, O. (1998): Carbonate-substituted phosphoellenbergerite from Modum, Norway: description and crystal structure. Mineralogy and Petrology, 62, 89-101.]
    Site Photo
    Tingelstadtjern Quarry, Modum, Buskerud, Norway
    © Knut Eldjarn
  		•  Raadeite (TL)
    Mg
     
    7
    		(PO
     
    4
    		)
     
    2
    		(OH)
     
    8
    Type Locality: Tingelstadtjern Quarry, Modum, Buskerud, Norway
    Reference: [AmMin 86:1536]
    Site Photo
    Tingelstadtjern Quarry, Modum, Buskerud, Norway
    © Knut Eldjarn
  		•  'Serpentine Group'
    D
     
    2
    		[Si
     
    2
    		O
     
    5
    		](OH)4 + or - nH
     
    2
    		O
    Reference: [Raade, G. (1979): Holtedahlite, a new magnesium phospate from Modum, Norway. LITHOS 12, 283-287]
  		•  Szaibélyite
    Mg
     
    2
    		[(OH)(B
     
    2
    		O
     
    4
    		(OH))]
    Description: At this locality szaibelyite occure in thin veins cutting althausite.
    Reference: [Raade & Tysseland (1975, p. 215); Neumann (1985, p. 104).]
  		•  Talc
    Mg
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    Reference: [Raade, G. (1979): Holtedahlite, a new magnesium phospate from Modum, Norway. LITHOS 12, 283-287]
  		•  Xenotime-(Y)
    YPO
     
    4
    Habit: euhedral crystals up to 1 mm
    Colour: brownish
    Description: embedded in althausite
    Reference: [Raade & Tysseland (1975, p. 215); Neumann (1985, p. 116); Anthony, Bideaux, Bladh, Nichols ("Handbook of Mineralogy", Vol. 4, 2000).]


    20 entries listed. 17 valid minerals. 4 type localities (valid minerals).

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