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PRIMARY MINERAL SEQUENCE

PRIMARY MINERAL SEQUENCE. Bowen’s Reaction Series. Less resistant. 1400 ° C. mafic (basic) intermediate felsic (acidic). olivine pyroxene amphibole biotite. calcium - rich plagioclase sodium - rich. ( orthoclase ). Discontinuous Branch.

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PRIMARY MINERAL SEQUENCE

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  1. PRIMARY MINERAL SEQUENCE Bowen’s Reaction Series Less resistant 1400 °C mafic (basic) intermediate felsic (acidic) olivine pyroxene amphibole biotite calcium - rich plagioclase sodium - rich ( orthoclase ) Discontinuous Branch Continuous Branch orthoclase ( k-rich ) muscovite quartz More resistant 800 ° C McClelland’s Weathering Sequence

  2. PRIMARY MINERAL SEQUENCE Bowen’s Reaction Series Less resistant 1400 °C mafic (basic) intermediate felsic (acidic) olivine pyroxene amphibole biotite calcium - rich plagioclase sodium - rich andesite ( orthoclase ) Discontinuous Branch Continuous Branch dacite orthoclase ( k-rich ) muscovite quartz rhyolite More resistant 800 ° C McClelland’s Weathering Sequence

  3. AcidicIntermediateMafic Coarse : granite monzonite gabbro Medium : (--) porphyry (--) porphyry diabase Fine : rhyolite latite andesite (Na), basalt (Ca)

  4. p. 5-4, Field Book …, 2002

  5. Schoeneberger vesicular basalt (in lava flow) Kilbourne Hole, NM

  6. Schoeneberger rhyolite from Organ Mtns, NM

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