Intergranular Texture

Intergranular is a textural term indicating that a crystal occupies the angular space between at least two larger crystals. Intergranular crystals have crystallised later than the crystals that control their shape. A common case of Intergranular texture is in which the space between plagioclase crystals is occupied by one or more granules of pyroxene (± olivine and opaque oxides) not in optical continuity between them.

Bibliography



• Deer, W.A., Howie, R.A., Zussman, J. (1998) Rock-forming Minerals.
• Optical Mineralogy : The Nonopaque Minerals by Phillips / Griffen
• E. WM. Heinrich (1956): Microscopic Petrografy. Mcgraw-hill book company,inc
• Cox et al. (1979): The Interpretation of Igneous Rocks, George Allen and Unwin, London.

Photo
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Basalt with intergranular groundmass. PPL image , 10x (Field of view = 2mm)
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Basalt with intergranular groundmass. XPL image , 10x (Field of view = 2mm)
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Basalt with intergranular groundmass. PPL image , 10x (Field of view = 2mm)
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Basalt with intergranular groundmass. PPL image , 10x (Field of view = 2mm)
intergranulare(6).jpg

Basalt with intergranular groundmass. XPL image , 10x (Field of view = 2mm)
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Basalt with intergranular groundmass. PPL image , 10x (Field of view = 2mm)
intergranulare(8).jpg

Basalt with intergranular groundmass. XPL image , 10x (Field of view = 2mm)
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Basalt with intergranular groundmass. PPL image , 10x (Field of view = 2mm)
intergranulare(10).jpg

Basalt with intergranular groundmass. PPL image , 10x (Field of view = 2mm)
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Basalt with coarse-grained intergranular groundmass. XPL image , 2x (Field of view = 7mm)
intergranulare2013(4).jpg

Basalt with coarse-grained intergranular groundmass. XPL image , 2x (Field of view = 7mm)
intergranulare2013(5).jpg

Basalt with coarse-grained intergranular groundmass. XPL image , 2x (Field of view = 7mm)
intergranulare2013(6).jpg

Basalt with coarse-grained intergranular groundmass. XPL image , 2x (Field of view = 7mm)
intergranulare2013(7).jpg

Basalt with coarse-grained intergranular groundmass. XPL image , 2x (Field of view = 7mm)
intergranulare2013(8).jpg

Basalt with coarse-grained intergranular groundmass. XPL image , 2x (Field of view = 7mm)