Alk vs. Calc-alk.: general appearance. Alkaline series – textures.

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Presentation transcript:

Alk vs. Calc-alk.: general appearance

Alkaline series – textures

Calc-alkaline series – textures

Alkaline series – White Minerals K-Feldspar

Alkaline series – White Minerals Feldpathoids

Alkaline series – White Minerals Feldpathoids

Alkaline series – Mafic Minerals Sodic pyroxene (Aegyrine)

Alkaline series KSp and Augite-Aegyrine

Alkaline series – Mafic Minerals Sodic amphibole (Riebeckite, Arfvedsonite) (not clear in provided samples) ce/faculty/arc/amphibole.html

Alkaline series – Accessory Minerals Sphene (Titanite)

Alkaline series – Accessory Minerals Carbonates, Cancrinite

Calc-alkaline series – White Minerals Plagioclase

Calc-alkaline series – White Minerals Plagioclase

Calc-alkaline series – White Minerals Plagioclase, K-Feldspar, Quartz

Calc-alkaline series – Minerals Plagioclase, K-Feldspar, Quartz

Calc-alkaline series – Mafic Minerals Clinopyroxene (augite)

Calc-alkaline series – Mafic Minerals Hornblende

Calc-alkaline series – Mafic Minerals Hornblende

Calc-alkaline series – Mafic Minerals Hornblende + Biotite

Calc-alkaline series – Mafic Minerals Biotite

Calc-alkaline series – Mafic Minerals `Biotite + Clinopyroxene

Chemistry: TAS

Chemistry: TiO 2

Chemistry: CaO

Chemistry: A/CNK vs. A/NK

Normative minerals Alkaline –Or+Ab (abundant) –Foids (common) –Olivine (common) –Cpx –Qz (rare) –Aegyrine (occasional) Calc-alkaline –Quartz –Ab+An (abundant) –Opx –Cpx (occasional) –Corundum (occasional)