Title
Quartz Diorite
Alternative Title
Plagioclase - Quartz - Diorite
Identifier
TMJ-07
Description
Rock Sample:
The color of the crystals within the sample is half-white and half-black in color. The internal part of the sample feels rough, but the outside layer of the sample feels more like a fine-grained. This could be due to erosion on the exterior of the sample. There are dark and white crystals that are ≤1cm in length. There are some areas of small, light green crystal blotches. Minor chemical weathering has taken place on this sample.
Thin Section:
There is micro-twinnings within some of the plagioclase crystals. There are also some large fractures within some of the coarse-sized quartz.
-Plagioclase (45%)
-Quartz (25%)
-Clinopyroxene (30%)
-Magnification at 4x/0.10
The color of the crystals within the sample is half-white and half-black in color. The internal part of the sample feels rough, but the outside layer of the sample feels more like a fine-grained. This could be due to erosion on the exterior of the sample. There are dark and white crystals that are ≤1cm in length. There are some areas of small, light green crystal blotches. Minor chemical weathering has taken place on this sample.
Thin Section:
There is micro-twinnings within some of the plagioclase crystals. There are also some large fractures within some of the coarse-sized quartz.
-Plagioclase (45%)
-Quartz (25%)
-Clinopyroxene (30%)
-Magnification at 4x/0.10
Date
1969
Contributor
Western Minerals, Inc.
Is Part Of
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