| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2013-06-07 |
| タイトル |
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|
タイトル |
試錐結果からみた鹿児島地溝西縁部 姶良町の地下地質と温泉貯溜層 |
| その他のタイトル |
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その他のタイトル |
Stratigraphic sequence and geothermal reservoir inferred from the drilling results in Aira Town, we stern margin of Kagoshima Graben |
| 言語 |
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言語 |
jpn |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
| 作成者 |
福留, 高明
青崎, 玄
的場, 保望
竹内, 貞子
FUKUDOM, Taka'aki
AOZAKI, Gen
MATOBA, Yasumoch
TAKEUCHI, Sadako
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| 内容記述 |
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内容記述タイプ |
Other |
|
内容記述 |
Kagoshima Graben of southern Kyushu is a volcano-tectonic depression, which is presumed to have been formed ca. 2.9 Ma. The depth of the graben considerably exceeds 1,000 meters. A bore hole deeply dri11ed in the search for hot water is situated in western margin of the graben. Our study of the boring samples has reveals that the subsurface stratigraphic sequence is mainly divided into three formations. The lower formation consists of subaqueous pyroclastic rocks and siltstone with foraminifera and pollen fossils ; both the middle and upper formations are composed of welded tuff. These are correlative with the graben-fill marine deposits (Kekura Formation) of the middle Pleistocene and the terrestrial pyroclastic flows from gigantic calderas of the upper Pleistocene respectively. A fault between here and western adjacent area is inferred, and its vertical displacement after the deposition of the lower formation is estimated to be about 500 meters. The fault may be one of the western marginal normal faults of Kagoshima Graben. We present a structural model of geothermal reservoir based on the analyses of alteration minerals, chemical compositions of thermal water, temperature, change of water level，etc. The geothermal water is embedded in two horizons of the lower formation. The reservoirs are accompanied by superior cap rocks resulted from self-sealing. The water of this well belongs to that of a sea coast-type hot spring. However it is richer in Ca^<2+>, Mg^<2+> and SO_4^<2-> and poorer in K^+ than typical one. |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 書誌情報 |
秋田大学鉱山学部資源地学研究施設報告
号 53,
p. 41-56,
発行日 1988-03-01
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| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
09139907 |
| NCID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AN1006497X |
| 出版者 |
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出版者 |
秋田大学鉱山学部附属資源地学研究施設 |
fukudome5.pdf (27.4 MB)
