Megascopic description:

Gabbro (locally Diabasic), cut by basalt or diabasic dyke. Fractures filled with quartz, later cut gabbro and dyke.

Microscopic description:

The thin section of gabbro that their original minerals such as pyroxene, plagioclase, and olivine usually altered into chlorite, calcite, epidote, and quartz. The gabbro is cut by the diabasic dyke which are characterized by the intergrowth minerals of pyroxene and plagioclase, 0.1 – 0.3 mm in size, subhedral in crystal shape. The rocks sometimes fractured that their fractures are filled by calcite, quartz, and zeolite minerals.

MACRO PHOTOGRAPH

MICRO PHOTOGRAPH

Sample: Photo location 12

PPL

XPL

The thin section of gabbro which is cut by diabasic dyke. They are characterized by the intergrowth minerals of pyroxene and plagioclase, fine crystal, subhedral in crystal shape. The original minerals such as pyroxene, plagioclase, and olivine usually altered into chlorite, calcite, epidote, and quartz.

MICRO PHOTOGRAPH

Sample: Photo location 12

PPL

XPL

The thin section of gabbro which is cut by diabasic dyke. They are characterized by the intergrowth minerals of pyroxene and plagioclase, fine crystal, subhedral in crystal shape. The original minerals such as pyroxene, plagioclase, and olivine usually altered into chlorite, calcite, epidote, and quartz..