Bottom of hydrothermal convection found by temperature measurements above 500{degrees}C and fluid inclusion study of WD-1 Kakkonda geothermal field, Japan
- Japan Metals and Chemicals Co., Ltd., Iwate (Japan); and others
NEDO has drilled WD-1 in the Kakkonda geothermal field, as a part of the {open_quotes}Deep-Seated Geothermal Resources Survey{close_quotes} project. We performed temperature measurements and fluid inclusion study of WD-1. The logging temperatures above 414{degrees}C were confirmed at 3,600 and 3,690m depths for S.T.=82h, and the temperatures above 500{degrees}C were also confirmed by using temperature melting tablets at 3,700m depth for S.T.=129h and 159h. This temperature is the highest recorded for a geothermal bore hole in Japan. Formation temperature in the Quaternary Kakkonda Granite can be evaluated roughly from homogenization temperature of the liquid-rich inclusion which has minimum salinity at every depth. As a result of temperature measurements, we found the boundary between the hydrothermal convection zone and the heat conduction zone at about 3,100m depth. Data obtained by fluid inclusion study is also judged to be consistent with this conclusion.
- OSTI ID:
- 494411
- Report Number(s):
- CONF-960913-; TRN: 97:002642-0088
- Resource Relation:
- Conference: Annual meeting of the Geothermal Resources Council, Portland, OR (United States), 29 Sep - 2 Oct 1996; Other Information: PBD: 1996; Related Information: Is Part Of Geothermal development in the Pacific rim. Transactions, Volume 20; PB: 886 p.
- Country of Publication:
- United States
- Language:
- English
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