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Malignite

Malignite is a type of gabbro that derives its name from the Maligne River in Ontario, Canada where the type occurrence can be found. The rock generally contains nepheline and orthoclase feldspar in approximately equal amounts, each comprising approximately 20 percent of the rock. About half of the rock is composed of clinopyroxene, and the remaining ten percent of the gabbro’s composition usually consists of small amounts of sphene, biotite, and apatite. When the amount of nepheline is significantly lessened, the gabbro is no longer considered malignite, but instead is known as shonkinite.


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