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Article: Calcite vein-dikes of the Grenville Geological Province Ontario, Canada.
- Article from:
- Rocks & Minerals
- Article date:
- January 1, 2006
- Author:
CopyrightCOPYRIGHT 2006 Heldref Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Calcite vein-dikes in the Grenville Geological Province have been the source of fabulous mineral specimens for more than one hundred years. Calcite vein-dikes, which are composed of a high percentage of predominantly calcite, have been significantly mobile at some point of their formation; they are characterized by the occurrence and variable combinations of large crystals in contact with the wall rock or "floating" in the calcite. These crystals are most commonly feldspar (orthoclase-microcline fluorapatite, mica-group minerals, pyroxene-group minerals and or amphibole-group minerals, scapolite-group minerals, and, less commonly, titanite, ilmenite, and zircon. The ...
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