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Petrography of East-Timor-Leste

 

Roberto Weinberg, Monash University, Australia

 

 

 

Petrography

 

 

  • Hili Manu Peridotite

  • Atauro Island

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    Hili Manu Peridotite

     

    Literature see Berry, R.

     

     

    Boudinaged and recrystalized
    porphyroclasts of opx
    All photomicrographs are 2mm across.     		Recrystalized opx
    in olivine matrix     		Strongly sheared, opx.

     


    Shearing in lherzolite
    Plane polarized light.
    Shearing in lherzolite
    Plane polarized light.
    Late brittle, open-space fault
    cutting the lherzolite

     

     

    Atauro Island - the Inner Banda Volcanic Arc

     


    Outcrop close to Vila,
    auto-breccia aug-plag basalt.

     


    Andesite-basalt auto-breccia
    from Vila shown above notice fragments.
    Plag-Aug basalt andesite
    Notice stretched vesicles (left)
    plane polarized light.
    Crossed polars.

     


    Sample collected on the
    way to Macudede (Atauro 2).
    Plag-Aug-Hbl andesite
    plane polarized light (Atauro 3).
    Plag-Aug-Hbl andesite
    Crossed polars.

     


    Flow in andesite lava (Atauro 3)
    plane polarized light.
    Flow in andesite lava (Atauro 3)
    plane polarized light.
    plag-aug andesite-basalt (Atauro 4).

     


    plagioclase synneusis (Atauro 5).
    plagioclase synneusis (Atauro 5.)
    plagioclase synneusis (Atauro 5).

     


    plagioclase synneusis (Atauro 6).
    plagioclase and vesicles (Atauro 6).