Title
Hornfels, Green Diopside bearing
Alternative Title
Slate - Hornfels - Whetstone
Identifier
TMJ-1
Description
Rock Sample:
The sample is metamorphic. It is green to light-green in color. There are very course grained tabular zones of metamorphism (12x4cm) and light to dark layering with non-uniform shapes and patterns. The grains are aphanitic. The majority of the sample has an overall smooth texture.
Thin Section:
The thin section has small vein-like fractures filled in by larger quartz crystals.There are some fractures that are not filled in. It is Quartz-rich, though the size of the quartz crystals are small.
-Quartz (80%)
-Pyroxene (20%)
-Magnification at 4x/0.10
The sample is metamorphic. It is green to light-green in color. There are very course grained tabular zones of metamorphism (12x4cm) and light to dark layering with non-uniform shapes and patterns. The grains are aphanitic. The majority of the sample has an overall smooth texture.
Thin Section:
The thin section has small vein-like fractures filled in by larger quartz crystals.There are some fractures that are not filled in. It is Quartz-rich, though the size of the quartz crystals are small.
-Quartz (80%)
-Pyroxene (20%)
-Magnification at 4x/0.10
Date
1969
Contributor
Western Minerals, Inc.
Is Part Of
Spatial Coverage
Tanzawa Mountains, Japan South Portal of tunnel (Zone V)
Temporal Coverage
N/A
Accrual Method
Purchased from Western Minerals Inc.
Unit
(Zone V)
Number of Thin Sections
1