Alnoite

Photographed by Michael P. Klimetz

Chilwa Island

Chilwa Alkaline Complex

Zomba District

MALAWI

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Photographed by Michael P. Klimetz

Oka Carbonatite Complex

Oka

Deux-Montagnes County

Quebec

CANADA

Alnoite, named from the Island of Alnön in Sweden, is a lamprophyre chiefly composed of biotite or phlogopite and melilite as essential minerals, commonly with olivine, calcite and clinopyroxene. Perovskite, apatite, nepheline and garnet may also be present as accessory phases. A detailed and in-depth synthesis of the geologic and mineralogic origins, occurrences and petrotectonic features of alnoite and related lithologies have been beautifully presented on Alex Streckeisen's alnoite webpage