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Abstract

46

ISHIMURA ATSURA

NPO . NPO Think-tank

Kyoto Institute of Natural History, Yoshida-Kawaramachi , Sakyoku, Kyoto , Japan.

. Katsura Hot-Spring Insti-

tute, Isshincho , Imadegawa-dori Teramachi Higashi-iru, Kamigyo-ku, Kyoto , Japan.

hot and mineral springs in Kyoto Basin, artesian spring, deep well, sulfureous

spring, radioactive spring

J. Hot Spring Sci.

This paper described on the hot and/or mineral springs in Kyoto Basin. Until some

dozen years ago, artesian flowing and shallow mineral springs are known around Kyoto

Basin. There are sulfuretted or sulfureous springs in the impregnated deposited and

radioactive water around Daimonji’ granitic body and along Hanaori active faults, re-

spectively.

A deep well until , m depth has been drilled at NE corner of Ohara sub-basin,

getting a hot spring. After then, some deep wells are drilled to get hotsprings, but higher

than hotsprings are known only along Katakibara active faults at Rakusai New

Town, of which area was su ered from Hyogoken-nanbu earthquake ( ).

Key words :

Susumu N and Kyozo K

Hotsprings in Kyoto Basin

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drilled well and sample number, arrow : Kamogawa river, : Mount Yoshida, a-a :

Fig. The distribution of Rn activity in the deep (about m depth) groundwater in

the northern part of Kyoto basin, in units of . Bq/ ( Ci/ ). : position of

Karasuma-dori (street). b-b : Chiekoin-dori.

l l

47

:

Nishimura and Katsura

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Fig. The distribution of the heat flow in and around Kinki district and the section of

the heat flow in the square area (modified from Furukawa ).et al.,

48

,+332

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Fig. The He/ He profile in the Kinki and Chugoku Districts. The dashed line

shows the atmospheric ratio (modified from Sano and Wakita, ).

49

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Fig. A plausible model for the migration of H O and the generation of basalt magmas in

subduction zone. The hydrated Peridotite is formed by addition of slab-derived H O (solid

arrows) beneath the forearc region and should be dragged on the slab by thesubduction of

oceanic lithosphere (Nishimura, ; modified from Tatsumi, ). AM-CHL : Amphibolite,

PH : Philogopite.

50

He He Sano

and Wakita,

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Fig. Geological map and localities of hot-springs in Kii Peninsula.

51

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Fig. Location of hotsprings along Katakibara and Komyoji active faults and

su ered area from Hyogoken-nanbu earthquake ( ).

: hotspring. Shadow area : su ered area from Hyogoken-nunbu earthquake.

52

Nishimura and Katsura,

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Fig. Distribution and change with time of epicenters in at Tanba mountainous district.

53

1 +33.

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Fig. Columnar descriptions of drilling well of Takenosato Hot-Spring.

54

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Table .

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Table The analysis table of Takenosato Hotspring.

55

Na HCO CO

Furukawa, Y., Shinjoe, H. and Nishimura, S. ( ) : Heat flow in the Japan arc and its im-

+

,- -

/3 ,**3

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Nishimura, S. ( ) : On some relation between underground water and radioactivity in Kyoto

Nishimura, S. and Katsura, I. ( ) : Radon in soil gas : Applications in Exploration and Earth-

plication for thermal processes under arcs, Geophys. Res. Lett., , .

: .

Arsadi, E.M., :

.

:

.

:

.

: .

:

City, Higashiyama Koko Kenkyu Kiyo, , .

: .

: .

Nishimura, S. ( ) : Quaternary arc volcanism of Sunda and Southwest Japan Arcs, Proc.

Symp. Japan-Indonesia IDNDR Project, Sept. , Bandung, Indonesia, .

: .

: .

: .

quake Prediction, in Geochemistry of Gaseous Elements and Compounds, E.A. Durrance

et al. eds., pp , Theophratus Pub., Greece.

:

.

: .

:

.

Sano, Y. and Wakita, K. ( ) : Geographic distributions of the He/ He ratios in Japan : Im-

plications for arc tectonics and incipient magmatism, Jour. Geophys. Res., , .

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