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Mineral chemistry of some agates from Gurasada (Mureş Valley, Romania).
- Source :
- Studia Universitatis Babes-Bolyai, Geologia; 2009, Vol. 54 Issue 1, p37-41, 5p, 4 Color Photographs, 1 Black and White Photograph, 2 Charts, 1 Graph, 1 Map
- Publication Year :
- 2009
-
Abstract
- The paper presents the study of some agates from the Gurasada area (Mureş Valley, West Romania) and their igneous host rocks. Agates occur in the vesicles of strongly altered pyroclastic rocks ("banatites"), such as basaltic andesites, trachyandesites, trachytes and dacites or in the alluvial sediments along the Gurasada valley. The age of host-rocks is Late Cretaceous-Early Paleogene. Agates consist mainly of various types of α-quartz such as: chalcedony, quartzine and microquartz, associated with moganite. The genesis of agates is related with the hydrothermal solutions which altered the host-rocks. [ABSTRACT FROM AUTHOR]
- Subjects :
- GEMS & precious stones
QUARTZ
IGNEOUS rocks
OXIDE minerals
Subjects
Details
- Language :
- English
- ISSN :
- 12210803
- Volume :
- 54
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Studia Universitatis Babes-Bolyai, Geologia
- Publication Type :
- Academic Journal
- Accession number :
- 43823077
- Full Text :
- https://doi.org/10.5038/1937-8602.54.1.8