Supercritical geothermal reservoir revealed by a granite–porphyry system

研究成果: Article査読

26 被引用数 (Scopus)

抄録

To understand the geological properties of a supercritical geothermal reservoir, we investigated a granite–porphyry system as a natural analog. Quartz veins, hydrothermal breccia veins, and glassy veins are present in Neogene granitoids in NE Japan. The glassy veins formed at 500–550 °C under lithostatic pressures, and then pressures dropped drastically. The solubility of silica also dropped, resulting in formation of quartz veins under a hydrostatic pressure regime. Connections between the lithostatic and hydrostatic pressure regimes were key to the formation of the hydrothermal breccia veins, and the granite–porphyry system provides useful information for creation of fracture clouds in supercritical geothermal reservoirs.

本文言語English
ページ(範囲)182-194
ページ数13
ジャーナルGeothermics
63
DOI
出版ステータスPublished - 2016 9月

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • 地盤工学および土木地質学
  • 地質学

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