ニュージーランドの地熱系
This paper is aimed at introducing an outline of the geothermal systems of theTaupo Volcanic Zone in New Zealand based mainly on a recent review by Hedenquist(1986).The development of New Zealand's geothermal energy resources began in the late1940s, and the world's first "wet steam&qu...
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ftkagoshima:oai:ir.kagoshima-u.ac.jp:00005220 2023-07-30T04:07:25+02:00 ニュージーランドの地熱系 Geothermal Systems in New Zealand ニュージーランド ノ チネツケイ 田口 幸洋 HEDENQUIST Jeffrey W. http://hdl.handle.net/10232/16104 https://ir.kagoshima-u.ac.jp/?action=repository_uri&item_id=5220 https://ir.kagoshima-u.ac.jp/?action=repository_action_common_download&item_id=5220&item_no=1&attribute_id=16&file_no=1 ja jpn 鹿児島大学 http://hdl.handle.net/10232/16098 http://hdl.handle.net/10232/16099 http://hdl.handle.net/10232/16100 http://hdl.handle.net/10232/16101 http://hdl.handle.net/10232/16102 http://hdl.handle.net/10232/16103 http://hdl.handle.net/10232/16105 http://hdl.handle.net/10232/16106 http://hdl.handle.net/10232/16107 http://hdl.handle.net/10232/16108 http://hdl.handle.net/10232/16097 https://ir.kagoshima-u.ac.jp/?action=repository_uri&item_id=5220 http://hdl.handle.net/10232/16104 南方海域調査研究報告=Occasional Papers, 11, 41-70 02892707 AN10030752 https://ir.kagoshima-u.ac.jp/?action=repository_action_common_download&item_id=5220&item_no=1&attribute_id=16&file_no=1 450 Departmental Bulletin Paper ftkagoshima 2023-07-07T00:14:31Z This paper is aimed at introducing an outline of the geothermal systems of theTaupo Volcanic Zone in New Zealand based mainly on a recent review by Hedenquist(1986).The development of New Zealand's geothermal energy resources began in the late1940s, and the world's first "wet steam" geothermal station was constructed in 1958 atWairakei. Geothermal electricity from Wairakei supplies 150 MW, some 4% of NewZealand's total requirements at present; another 100 MW will be provided by 1989 by the new development at Ohaaki.Twenty major geothermal systems are located in the Taupo Volcanic Zone. The zone extends from the active andesite volcano Mt.Ruapehu to White Island, another active volcano 220km north northeast in the Bay of Plenty; this is a zone of extensive geologic structural depression. A considerable volume of rhyolitic material fills thedepression, erupted during the last ~1.0 Ma. Geothermal drilling and gravity surveyshave revealed a relatively simple set of horst and graben blocks in the basement. Mostof the geothermal systems have boiling springs at the surface and measured heat flows of 50 to 500 MW. They all have areas of low resistivity of a few to several km^<2>, indicating that hot saline water is present at depth. Chemical and isotopic studies of deep hot water indicate that the hot fluids are dominated by meteoric waters which have been heated and have acquired most of their solutes during deep circulation.Gold and silver is presently being deposited in most of the geothermal systems inthe Taupo Volcanic Zone. The study of gold deposition in such active geothermalsystems has allowed us to unequivocally define the chemistry of the metal transporting fluids, and to identify fluid boiling and gas loss as the principal process leading to golddeposition in the analogous fossil epithermal environment. Report White Island Kagoshima University Repository New Zealand White Island ENVELOPE(48.583,48.583,-66.733,-66.733) Bay of Plenty ENVELOPE(-128.761,-128.761,52.837,52.837) |
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450 田口 幸洋 HEDENQUIST Jeffrey W. ニュージーランドの地熱系 |
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description |
This paper is aimed at introducing an outline of the geothermal systems of theTaupo Volcanic Zone in New Zealand based mainly on a recent review by Hedenquist(1986).The development of New Zealand's geothermal energy resources began in the late1940s, and the world's first "wet steam" geothermal station was constructed in 1958 atWairakei. Geothermal electricity from Wairakei supplies 150 MW, some 4% of NewZealand's total requirements at present; another 100 MW will be provided by 1989 by the new development at Ohaaki.Twenty major geothermal systems are located in the Taupo Volcanic Zone. The zone extends from the active andesite volcano Mt.Ruapehu to White Island, another active volcano 220km north northeast in the Bay of Plenty; this is a zone of extensive geologic structural depression. A considerable volume of rhyolitic material fills thedepression, erupted during the last ~1.0 Ma. Geothermal drilling and gravity surveyshave revealed a relatively simple set of horst and graben blocks in the basement. Mostof the geothermal systems have boiling springs at the surface and measured heat flows of 50 to 500 MW. They all have areas of low resistivity of a few to several km^<2>, indicating that hot saline water is present at depth. Chemical and isotopic studies of deep hot water indicate that the hot fluids are dominated by meteoric waters which have been heated and have acquired most of their solutes during deep circulation.Gold and silver is presently being deposited in most of the geothermal systems inthe Taupo Volcanic Zone. The study of gold deposition in such active geothermalsystems has allowed us to unequivocally define the chemistry of the metal transporting fluids, and to identify fluid boiling and gas loss as the principal process leading to golddeposition in the analogous fossil epithermal environment. |
format |
Report |
author |
田口 幸洋 HEDENQUIST Jeffrey W. |
author_facet |
田口 幸洋 HEDENQUIST Jeffrey W. |
author_sort |
田口 幸洋 |
title |
ニュージーランドの地熱系 |
title_short |
ニュージーランドの地熱系 |
title_full |
ニュージーランドの地熱系 |
title_fullStr |
ニュージーランドの地熱系 |
title_full_unstemmed |
ニュージーランドの地熱系 |
title_sort |
ニュージーランドの地熱系 |
publisher |
鹿児島大学 |
url |
http://hdl.handle.net/10232/16104 https://ir.kagoshima-u.ac.jp/?action=repository_uri&item_id=5220 https://ir.kagoshima-u.ac.jp/?action=repository_action_common_download&item_id=5220&item_no=1&attribute_id=16&file_no=1 |
long_lat |
ENVELOPE(48.583,48.583,-66.733,-66.733) ENVELOPE(-128.761,-128.761,52.837,52.837) |
geographic |
New Zealand White Island Bay of Plenty |
geographic_facet |
New Zealand White Island Bay of Plenty |
genre |
White Island |
genre_facet |
White Island |
op_relation |
http://hdl.handle.net/10232/16098 http://hdl.handle.net/10232/16099 http://hdl.handle.net/10232/16100 http://hdl.handle.net/10232/16101 http://hdl.handle.net/10232/16102 http://hdl.handle.net/10232/16103 http://hdl.handle.net/10232/16105 http://hdl.handle.net/10232/16106 http://hdl.handle.net/10232/16107 http://hdl.handle.net/10232/16108 http://hdl.handle.net/10232/16097 https://ir.kagoshima-u.ac.jp/?action=repository_uri&item_id=5220 http://hdl.handle.net/10232/16104 南方海域調査研究報告=Occasional Papers, 11, 41-70 02892707 AN10030752 https://ir.kagoshima-u.ac.jp/?action=repository_action_common_download&item_id=5220&item_no=1&attribute_id=16&file_no=1 |
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1772820719603810304 |