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Três Pontas, Minas Gerais, Southeast Region, Brazil

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Três Pontas nappe (Quartz-K feldspar-kyanite-garnet gneisses, kyanite-garnet granulites associated with impure quartzites, calc-silicates rocks and ultramafic sills and lenses).
Lenses (boudins) of quartz+feldspar leucosomes within kyanite Al-grnulites and ultramafic lenses of phlogopite orthopyroxenites and garnet clinopyroxenites.
UHP metamorphic rocks recrystallized into high-grade granulite at shallower levels during exhumation (collision zone).



References:
- Chris D. Parkinson et al. (2001): "Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html.





Mineral List:
  		•  'Albite-Anorthite Series'
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  'Almandine-Pyrope Series'
    Description: With spessartite-rich (15 mol%) core.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  'Apatite'
    Description: Inclusions in garnet mantle.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Calcite
    CaCO
     
    3
    Description: In the spessartite-rich garnet core.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  'Clinopyroxene Subgroup'
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Coesite
    SiO
     
    2
    Description: Replaced by quartz.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Graphite
    C
    Description: In the spessartite-rich garnet core.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Ilmenite
    Fe
    2+
     
    		TiO
     
    3
    Description: In the spessartite-rich garnet core.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Jadeite
    Na(Al,Fe
    3+
     
    		)[Si
     
    2
    		O
     
    6
    		]
    Description: Inclusions in garnet mantle.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
    Site Photo
    Três Pontas, Minas Gerais, Southeast Region, Brazil
    © Martins da Pedra
  		•  'K Feldspar'
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Kyanite
    Al
     
    2
    		[O|SiO
     
    4
    		]
    Description: Inclusions in garnet mantle.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  'Monazite'
    Description: Inclusions in garnet mantle.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Muscovite
    KAl
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  'Orthopyroxene Subgroup'
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Phengite
    Description: Inclusions in garnet mantle.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Phlogopite
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Pyrope
    Mg
     
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Pyrophyllite
    Al
     
    2
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    Description: In the spessartite-rich garnet core.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Quartz
    SiO
     
    2
    Description: Replaces coesite. Inclusions in garnet mantle. In the spessartite-rich garnet core.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]
  		•  Rutile
    TiO
     
    2
    Description: Exsolution rods in garnet mantle.
    Reference: [Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html ]


    20 entries listed. 12 valid minerals.

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