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 MineralsSodic amphibole (Riebeckite, Arfvedsonite)(not clear in provided samples)http://www.umanitoba.ca/geoscience/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: TiO2

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)