Mesoscopic observation by medical CT

Kakkonda Granite Biotite-Hornblende Granodiorite and Biotite-cpx Quartz Diorite appear deeper than WD-1a 2860m depth.

Medium-grained / equigranular

Age: 0.068_0.34Ma(K-Ar)

Kanisawa et al.(1994), Ikeuchi et al. (1996)

(a) X-ray CT image of a granite from WD-1a at 2936.445 m depth (Core No.11). (b) The photograph of polished surface. The slice positions of a and b are identical to each other. Both images are taken from downside. a: Miarolitic cavity, b: Enclave, c: Mafic mineral.

• Miarolitic cavity is a small irregular cavity in phaneritic igneous rocks into which small crystals of the rock-forming minerals protrude, and result from bubbles that consist of gases and fluids emitted from magma during magma consolidation.
• Enclave is a fragment of older rock within igneous rock, are included in all cores from the plutonic rocks.

Mesoscopic observation by medical CT

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