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Geothermal Energy

Science – Society – Technology

Fig. 3 | Geothermal Energy

Fig. 3

From: Physical property characterization of the Waipapa greywacke: an important geothermal reservoir basement rock in New Zealand

Fig. 3

A photograph of thin section of sample TTGW_11_3_17 showing grain size variation and mineralized veinlets (red line); B photomicrograph (XP; TTGW_11_3_17) showing typical grain size and texture of Waipapa basement greywacke; C photomicrograph (XP; TTGW_11_3_17) showing mineralized intragranular fractures in quartz grains; D photomicrograph (XP; TTGW_11_3_17) showing mineralized intergranular veinlets in Waipapa greywacke; E SEM backscatter image (TTGW_11_3_17) showing mineralized intragranular fractures within a quartz grain; F SEM backscatter image (TTGW_11_3_17) showing typical grain sizes and textures of Waipapa greywacke basement and the igneous textures noted in lithic grains. Qz = quartz, Pl = plagioclase

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