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Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand

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Mt. Ngongotaha is a rhyolite dome with high temperature gas phase silicate and oxide minerals present in cavities.

Ref.:
http://homepages.ihug.co.nz/~pincha/minerals.htm





Mineral List:
  		•  Augite
    (Ca,Na)(Mg,Fe
    2+
     
    		,Al,Fe
    3+
     
    		,Ti)[(Si,Al)
     
    2
    		O
     
    6
    		]
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
     
  		•  Edenite
    Na[Ca
     
    2
    		][Mg
     
    5
    		][(OH)
     
    2
    		|AlSi
     
    7
    		O
     
    22
    		]
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
     
  		•  Fayalite
    Fe
    2+
    2
    		[SiO
     
    4
    		]
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
    © Judy Rowe
  		•  Ferro-edenite
    [Na][Ca
     
    2
    		][Fe
    2+
    5
    		][(OH)
     
    2
    		|AlSi
     
    7
    		O
     
    22
    		]
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
    © Leon Hupperichs
  		•  Hematite
    Fe
     
    2
    		O
     
    3
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
    © crocoite.com
  		•  'Hornblende'
    Reference: [Martin Stolworthy Collection]
  		•  Ilmenite
    Fe
    2+
     
    		TiO
     
    3
    Reference: [Martin Stolworthy Collection]
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [J. Thornton, ed., Micro-Scope, February 1994]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
    © Judy Rowe
  		•  Mullite
    Al
     
    8
    		[(O,OH,F)|(Si,Al)O
     
    4
    		]
     
    4
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
     
  		•  Osumilite
    (K,Na)(Fe
    2+
     
    		,Mg)
     
    2
    		(Al,Fe
    3+
     
    		)
     
    3
    		(Si,Al)
     
    12
    		O
     
    30
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
    © Martin Stolworthy
  		•  Phlogopite
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
    © Saul Krotki 2005
  		•  Pseudobrookite
    Fe
     
    2
    		TiO
     
    5
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
    © Judy Rowe
  		•  Quartz
    SiO
     
    2
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
    © Judy Rowe
  		•  Richterite
    Na[CaNa][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
    Reference: [http://www.abdn.ac.uk/geology/profiles/analysis/software.htm recalc of http://www.abdn.ac.uk/geology/profiles/analysis/software.htm recalc of ferrikatophorite data ]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
     
  		•  Titanite
    CaTi[O|SiO
     
    4
    		]
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
     
  		•  Tridymite
    SiO
     
    2
    Reference: [Martin Stolworthy Collection]
    Site Photo
    Hendersons Quarry, Mt. Ngongotaha, Rotorua, Bay of Plenty, North Island, New Zealand
     


    16 entries listed. 15 valid minerals.

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