Occhiadine Metagabbro

Title

Occhiadine Metagabbro

Alternative Title

Gabbro

Identifier

NAO-5

Description

Dioritic gabbro with deformational oceanic metamorphism of amphibolitic to greenschist facies and overprinting of prehnite-pumpellite.
Primary phases: plagioclase, clinopyroxene, olivine, ilmenite. Oceanic metamorphic paragenesis: plagioclase, clinopyroxene, green to dark hornblende, actinolite, tremolite, chlorite.
Prehnite-pumpellyite metamorphic paragenesis: plagioclase saussuritization with possible neoformation of pumpellyite, clinozoisite, prehnite, chlorite. Gneissic-occhiadine (augen), with development of banded structure with different composition.
Porphyroclasts of the primary phases surrounded by newly formed granoblastic aggregates; tremolite and chlorite aggregates pseudomorphs of olivine. Very fine-grained neoformation of the phases of the prehnite-pumpellyite facies.

Date

no date

Contributor

Western Minerals Inc.

Spatial Coverage

M. Zenone, Italy

Temporal Coverage

Cretaceous-Eocene

Accrual Method

Purchased from Western Minerals Inc.

Number of Thin Sections

1

Geolocation