Quartz Diorite

Title

Quartz Diorite

Alternative Title

Plagioclase - Quartz - Diorite

Identifier

TMJ-06

Description

Rock Sample:
The samples color has a white matrix with dark green phenocrysts. It is phaneritic. There is evidence of chemical weathering due to the presence of a dark brownish orange film on the sample--may be oxidation. There is a sandy smooth feeling film above the TMJ-6 tag. Phenocrysts are medium to coarse grained ranging from 0.1~1cm in length. It has a rough feel overall.

Thin Section:
There is tartan twinning on some irregular-shaped plagioclase. It is a large crystal with intergrowths and many micro-tartan twinning crystal within it. Many of the irregular shaped plagioclase have many fractures or scratches in them. There is some amphibole that intergrew into some augite.
-Quartz (30%)
-Augite (25%)
-Amphibole (25%)
-Plagioclase (20%)
-Magnification at 4x/0.10

Date

1969

Contributor

Western Minerals, Inc.

Spatial Coverage

Tanzawa Mountains, Japan - North of South Contact

Temporal Coverage

N/A

Accrual Method

Purchased from Western Minerals Inc.

Unit

N/A

Number of Thin Sections

1

Geolocation