Glaucophane grains in retrogressed metabasalt
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
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Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) (opens in a new window)Credit: Samuele Papeschi (distributed via imaggeo.egu.eu)
Properties
Type
Image
Format
JPG
Size
968.0 KB
Aspect
4:3
Width
2560 px
Height
1920 px
Brand
IDS
Model
UEye Cockpit
Software
IDS software
Coordinates
42.8154, 10.4315
Tint
Brownish black
Submitted
20 May 2020
Taken
February 2017
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