Biotite Thin Section
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Biotite is a common phyllosilicate mineral within the mica group.
Biotite thin section. Biotite in thin section under cross polarized light. Under cross polarized light the biotite thin section appears darker brown in areas as well as a pink yellow color in others. Biotite in biotite gneiss plane polars biotite in biotite gneiss crossed polars biotite in biotite granite plane polars biotite in biotite granite crossed polars biotite in lamprophyre associated with the acadian orogeny plane polars biotite in lamprophyre associated with acadian orogeny crossed polars.
To link to this object paste this link in email im or document to embed this object paste this html in website. Home atlas of minerals in thin section. In addition small amounts of na rb cs and ba may substitute for k and like in other minerals f can substitute for oh and increase the stability of biotite to higher temperatures and pressures.
Biotite is a solid solution between the end members phlogopite kmg 3 alsi 3 o 10 oh 2 and annite kfe 3 alsi 3 o 10 oh 2 although pure annite does not occur in nature. Biotite thin section photomicrographs are taken in plane polarized light and cross polarized light and can easily be recognized under the microscope. Biotite thin section view description.
Home rocks and minerals biotite thin section reference url share. Add tags comment rate. Biotite in thin section thin section gigapans.
Biotite in brown and muscovite in an orthogneiss thin section under plane polarized light.
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