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Article: From the Antequera-Olvera Ophite, Malaga, Spain
- Article from:
- Mineralogical Record
- Article date:
- March 1, 1996
- Author:
CopyrightCopyright Mineralogical Record Mar 1996. Provided by ProQuest LLC. (Hide copyright information)
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INTRODUCTION
The Triassic rocks between the Antequera and Olvera regions in the Andalusian provinces of Maga and Cadiz have yielded many interesting, unstudied mineral occurrences in recent years. Three different varieties of quartz are also found in the area: dark smoky quartz ("morion"), green quartz (colored by inclusions of actinolite and chlorite) and an unusual blue quartz apparently colored by inclusions of aerinite, a zeolite-facies hydrothermal silicate-carbonate. The latter occurrence is the subject of this article.
The quartz occurrences are all related to basic volcanic rocks known as ophites, a general term for diabases that have retained their ophitic texture (i.e. lath-shaped ...