Orthopyroxene gabbro

Identifier

AD-6

Description

This specimen is typical of the saturated gabbros of the Adirondacks. The plagioclases are generally in the range of An₄₀ and the orthopyroxenes average close to En₆₀. Antiperthite is locally developed. Scattered grains of ilmenite and garnet occur. These gabbros may be genetically related to the anorthosites of the region.
Thin section shows plagioclase, orthopyroxene and hornblende.

Date

1980

Contributor

Temporal Coverage

Accrual Method

Purchased from Western Minerals Inc.

Number of Thin Sections

1

Geolocation