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.
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