Granophyre

Title

Granophyre

Alternative Title

Granophyre

Identifier

TMJ-10

Description

Rock Sample:
The sample color is mainly light grey to white. There is a lime green layer as well as some dark grey and brown groupings. It is pegmatic and experiences non-congruent foliation and Y-shaped fractures. There are dark brown to orange areas which indicate that chemical weathering took place. The sample has silty or sandy texture. In some spots around the sample there is a thin layer <0.1mm that resembles fine grained sandpaper in texture and color. It does not react with hydrochloric acid. Some of these "spots" are imbedded ~0.2mm in the exterior of the sample.

Thin Section:
There are micro-fractures in non-uniform formations. Also there are thick veins of quartz. The sample is hypocrystalline with fine grained size glass. Some of the pyroxene is intergrown into the quartz.
-Quartz (80%)
-Biotite (10%)
-Pyroxene (10%)
-Magnification at 4x/0.10

Scanning Electron Microscope:
The white power on the outside of the sample was made up of iron, calcium, silicon, aluminum, and little oxygen and carbon.

Date

1969

Contributor

Western Minerals, Inc.

Spatial Coverage

Tanzawa Mountains, Japan (Zone V) South of Locality 9

Temporal Coverage

N/A

Accrual Method

Purchased from Western Minerals Inc.

Unit

Zone V south of locality 9

Number of Thin Sections

1

Geolocation