Glaucophane grains in retrogressed metabasalt
by Samuele Papeschi, University of Pisa, Pisa, Italy
The metabasalt at the Rio Marina lighthouse outcrop (Island of Elba) contains relics of glaucophane, lawsonite, and omphacitic clinopyroxene that grew under blueschist-facies conditions. These rocks represent some of the highest pressure products of early continental underplating in the Northern Apennines.
The image shows some zoned blue glaucophane grain (with tiny actinolite rims) surrounded by chlorite, actinolite (greens), epidote (tiny high-relief grains), and clinopyroxene relics (large brown porphyroclasts).
Field of view is approximately 1.5 mm
Polarized light - parallel polars
Related article: https://doi.org/10.1111/jmg.12530
Taken in
February
2017
Submitted on 20 May 2020
Categories
- Earth Magnetism & Rock Physics (334)
- Geochemistry, Mineralogy, Petrology & Volcanology (812)
- Geodynamics (347)
- Tectonics and Structural Geology (517)
Location
- Europe (3312)
- Southern Europe (1415)
- Italy (350)
- Exact location (10.4315 E, 42.8154 N)
Tags
epidote, thin section, geodynamics, tectonics, metamorphism, blueschist, clinopyroxene, chlorite, omphacite, glaucophane
Colour distribution
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2560 × 1920 px;
image/jpeg; 968.0 KB
Camera:
IDS UEye Cockpit
Software: IDS software
Licence
Credit: Samuele Papeschi (distributed via imaggeo.egu.eu)
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