Calcsilicate rock

Title

Calcsilicate rock

Identifier

AD-8

Description

Minerals found in the calcsilicate facies contain quartz, diopside, enstatitic pyroxene, tremolite, calcite, and phlogopite. However, only a few thin sections have been found to contain all phases. In some specimens, the pyroxene is close to 100% enstatite. The assemblage may be due to the reaction tremolite=diopside+ enstatite + quartz +fluid. This reaction discussed by Boyd, "Hydrothermal Investigations of Amphiboles," in Abelson, p.377-396.
Thin section shows calcite, diopside and phlogopite.

Contributor

Western Minerals Inc.

Spatial Coverage

Adirondack Highlands-collected on NY Route 30 from a large road cut 3.1 miles east of Speculator, NY.

Temporal Coverage

Precambrian

Accrual Method

Purchased from Western Minerals Inc.

Unit

Blue Mountain Lake Formation

Number of Thin Sections

1

Geolocation