#$45 J. Hot Spring Sci. /3 .0ῌ/0 ,**3ῌ῎῎ῑῒῐῌ῍῏¢µ ¶+ " ·, ,+  .

  ,+  /,,*

Hotsprings in Kyoto Basin
Susumu NISHIMURA+ and Kyozo KATSURA,

Abstract
This paper described on the hot and/or mineral springs in Kyoto Basin. Until somedozen years ago, artesian ﬂowing and shallow mineral springs are known around Kyoto
Basin. There are sulfuretted or sulfureous springs in the impregnated deposited andradioactive water around 0Daimonji’ granitic body and along Hanaori active faults, respectively.
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 .,1 hotsprings are known only along Katakibara active faults at Rakusai NewTown, of which area was su#ered from Hyogoken-nanbu earthquake (+33/).
Key words : hot and mineral springs in Kyoto Basin, artesian spring, deep well, sulfureousspring, radioactive spring῏῍6789 +* :;<89=>$?@A@BCD EFGHIJ$ K$LM DNO* +210 PQ +211 RSTUVF-2 WU9 XYZ[>\R]^_-`[abTU-2cdefgh ijk$DQlmnAo +QRp-qrstuFvfwxqyz{lv|}[~7R'UC2 W[R?V 67[>\R]^ -G$ qyzvstR]^ -ijk$[7R'?VF-`[ E8<UVF-`[DSTUVF
C2f9 +33/  f 8AU #$DTUV@T 38AU-
RABC2 oD8 -.1 8_-2 +333  R¡¢£¤¥¦[§ stu
FR¨#$DTUVF-2 ©[§ st[¨#$[TUC7ª9«[stuF8¬.[­®¯°±7²[³´D_BCaW8_-2+NPO   0*0 ῌ 2-*/  ! +.. + NPO Think-tank
Kyoto Institute of Natural History, Yoshida-Kawaramachi +., Sakyoku, Kyoto 0*0ῌ2-*/, Japan.
,"#$ 0*,ῌ*2,. %&'()*!+,-./! 20. , Katsura Hot-Spring Institute, Isshincho 20, Imadegawa-dori Teramachi Higashi-iru, Kamigyo-ku, Kyoto 0*,ῌ*2,., Japan.

46

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#$%&'()*+,-. &#/0ῌ1234536789:
;'<=>'?@A+BC,DEF*G HI7AJ#9KL*GMN7ONP9QRSN,-. TDU'V WGX'#YZ[\]^ _P`EF*JaG 0b
'#8KLcdNP b8KL eNP*fg hi jkPlL* m*LSNnop+ NPYqr7sAJaGtuT#vw'#xyRz{ῌ|}PRF*J ~#T %
T %   +321 P-GP nxy'A+T#d +30+ P-G#),l+LRa b EPWWg xyRz{PRF* V ¡¢£¤¥ |}  ,**,¦*'§.TDUKR.xy')7¨L*JaG©3'VWGz{©ªw'#«¬¢­P-GP w'#M®¯ +321
Nishimura and Katsura +33*V ¡¢£¤¥ ,**, P-GX'#°±²³),# AKK´+P vµ#'1¬KL¶o*JaJ ·H¸ ,-G¹º d 3 ² +210

& d +* ² +211  P »'¼½F*Ja

Fig. + The distribution of Rn activity in the deep (about 0** m depth) groundwater in
the northern part of Kyoto basin, in units of -.1 Bq/l (+*+* Ci/l). ., : position ofdrilled well and sample number, arrow : Kamogawa river,  : Mount Yoshida, a-a῍ :Karasuma-dori (street). b-b῍ : Chiekoin-dori.

47   Fig. , The distribution of the heat ﬂow in and around Kinki district and the section ofthe heat ﬂow in the square area (modiﬁed from Furukawa et al., +332).

48

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,**3       !"#$ Rn %& '( )*(+ ,,-.
/012(+   3456 78 9:;!<= ">#?$@A Rn %& %0  Nishimura +30* &' Rn ()!"%BC )D*E@AFG

Fig. + H?+@AI ,JK+ #? I-L.M<=  N/E(0 0! 1 1OEPQR<= 92R: 234S5TU(PQ<=  VWXYZG[= \]6^_ 7`ab +,/** m E8PQ(.1 lῌ9:;<=(cd$e ,1.1fghi>j 9?@k0! 3 1 1 l A=8(IdIm=no(+  1p BqrstCD0! ++ 1@A%EFI 0** m PQR<= GuYv(cd$e -*H88+: Iw%xJyI%zC  1p 0! ++ 1{|K}~LgW (P=RIMN+: MPQ%/m +,,** m E8PQ% OP<D(:;<D= +., lῌ9 .,./(m G( Q, 5T.

R(SA=\ TU,D B5CVUWD g ῌi ,XYZ[ XZ[\(0A=  nrstC
P:( A=I] 5  ^B%/_-.

((+ , ` ¡,¢O ,=R £anb¡ c¤¥d¦eV§f¡,¨§f, 5©, g1ªh¢O(+  1p ¢O ,=R `
i«j Fig. ,, Furukawa et al., +332+®¯ °( Im=  ¬k <yl­

,*** ± Im  ²³!9l´m%µ -Heῌ.He 9nand Wakita +32- xoFig. -` p( .,#$Sano ¶«j· qrs9:#Itpuv¸9¹1B R:º  w'FR »¼ Dx ye½Fig. - The -He/.He proﬁle in the Kinki and Chugoku Districts. The dashed line
shows the atmospheric ratio (modiﬁed from Sano and Wakita, +32-).

49   Fig. . A plausible model for the migration of H,O and the generation of basalt magmas insubduction zone. The hydrated Peridotite is formed by addition of slab-derived H,O (solidarrows) beneath the forearc region and should be dragged on the slab by thesubduction ofoceanic lithosphere (Nishimura, +332 ; modiﬁed from Tatsumi, +33/). AM-CHL : Amphibolite,
PH : Philogopite.

  +32.  +320  +33.   -Heῌ.He Sanoand Wakita, +32- !"#$%&'()*+,-./0123145

6789:; <=>  -Heῌ.He   ?@A%BCDEFGH#IJKLMNONPQRSTUΐVῐW1X Fig. . YHLZ[\]^_ YHLZ
%B\`abc῎C_dc8ef῔\]^_g hῐT1ij_gῌk_glmno1pq_gl  ,**0:rst+uvw C ῑ|<=8 }~x Fig. /  ,*** ,**+ yzb{    1῍cDEFGH#IJKLMNONPQRST123῕gl  ,**2῏ZKP

: 8;BxCgll  ,**/   ( %d

- 8 ¡/bc¢1£¤{¥  \:¦c¡jbc¢1£¤8 §]¨ +30+ \©ª«¤ ¢¤ ¬ῒ­q{®¯{d­8 °±²d¤῕³ +32- +´µk¶d1{C¤ ·6 ¸¹ºu;8» ¼῔½|50

 /3  ,**3Fig. / Geological map and localities of hot-springs in Kii Peninsula.

   ! "#$%&'()* !+ ,-./01234567894 ,**,
:0;<= >?,-  ,**, =@ABCD EF
0;<CD GHIC*JKLMNOPQRCDSTU!VWX Fig.
0

Y!Z[X* \]^QR_X=`*`*abc_XdeZf%*gh;<iN\]jVWX k#lEFῌm= no;<*YMpqrsW tuv*wxCD51   Fig. 0 Location of hotsprings along Katakibara and Komyoji active faults andsu#ered area from Hyogoken-nanbu earthquake (+33/).
 : hotspring. Shadow area : su#ered area from Hyogoken-nunbu earthquake.

  .

    !"#$  %&'(ῌ)*+'(,-/0123- 456789:;<=>? Nishimura and Katsura, +33* @ABC89:;<=>?D:EFG=>HIJK/L  +31-. M6NO.
[\]

%&'(,-PQRSTNUV%&'(D)*+'(WXYZ/L PQRST^_6 Fig. 0 6`aUb6 cde_fghDi6 [j!-klmnop23-qrhZ/Y cde_fghst + uvw
 xy z{epf [|pf }~D>gh/ghDD 62 
6*cde_fghhg6i 6%&'(Df/23- Fig.
1  +33/ ++ u , u[[52¡¢£¤¥u¦§¨©ª «¬

/3  ,**3Fig. 1

Distribution and change with time of epicenters in +33. at Tanba mountainous district.

  ! "#$%&'( )*+,- .!/012345 6478/097 %& :;<=>?@A3 BCD7*#$E;<FG34 . /0HIJKL34! M,NOP7QR5ST!U53      CSA-MT  !"#$% &'ῌ()*+,-./0123456789 Fig. 2 :;<=> ?@A BCD ?
@A EF6G HI6JK9LMNOPQRS9
+333 T 3 UVW78XYZ[\ ,*** T - U / 2 +,,** m ]^78_` ab c0def1ghi 3/* m j]6Rklmn9 oPmn +., lῌpQ
pwZxyA z{|qrsFig. 2 Columnar descriptions of drilling well of Takenosato Hot-Spring.

54tuv

B}~WA9 H Table + NMB .,./  /3  ,**3Table +The analysis table of Takenosato Hotspring.

  Na  HCO- ! CO-,  "#$%&'()*+,- ./01-234567.!89:;, <=,**/ ῌ῏῎῍Furukawa, Y., Shinjoe, H. and Nishimura, S. (+332) : Heat ﬂow in the Japan arc and its im55   

plication for thermal processes under arcs, Geophys. Res. Lett., ,/, +*21ῌ+*3*.

 ,**3 :  /3 -0ῌ./.

 !"#$%&'()*& ,**, +,- +31 . "#$%& /012  Arsadi, E.M., 345 4678 +321 : 9:;"/ <=>?ῌ@6>?ABC9:DEFG H , .* /0+ῌ/1-.

  +31- : IJKLMNO CPQRSTIUVW P , ,0 +-0ῌ+.0.

  XYZ[ \:]^ +32- : ,-_`;IJKLaῌbc de

῏% f/ +/ +1ῌ,..
  ghij῎   +32. : klmnop

 -. 2+ῌ3+.

qYr  st)*& +321 : qYr 0  ,31 . uvwx y
Nishimura, S. (+30*) : On some relation between underground water and radioactivity in Kyoto
City, Higashiyama Koko Kenkyu Kiyo, 1, 0-ῌ1+.

  +33. : z{Cz{p

 .- +,2ῌ+-/.

  +33/ : rC|}~_:H   -. -32ῌ.*3.
Nishimura, S. (+332) : Quaternary arc volcanism of Sunda and Southwest Japan Arcs, Proc.
Symp. Japan-Indonesia IDNDR Project, Sept. ,+ῌ,-, Bandung, Indonesia, ,/ῌ-1.

  ,*** : mnIJKL #C  ,**+ : mn

CPT

 /+ 32ῌ+*1.

  ,**/ : IJKLIUVW /. +1-ῌ+10.

 .3 ,*1ῌ,+0.

Nishimura, S. and Katsura, I. (+33*) : Radon in soil gas : Applications in Exploration and Earthquake Prediction, in Geochemistry of Gaseous Elements and Compounds, E.A. Durrance
et al. eds., pp .31ῌ/--, Theophratus Pub., Greece.

    [῎ ῍=[ 2 6[ =  +320 : |}~9:;  -3 ,0/ῌ,1..

   12 6[ ,**0 : r   12 6[ z 8 ,**3 : _

 /0 -ῌ+/.

r  0+qY&/&¡¢£¤t 0.
Sano, Y. and Wakita, K. (+32-) : Geographic distributions of the -He/.He ratios in Japan : Implications for arc tectonics and incipient magmatism, Jour. Geophys. Res., 3*, 21,3ῌ21.+.

¥ ¦§ +33/ : ¨©ª©«¬­¬  ¬S®¯°±²³G´IµKW y/wx +2* .
y¶·¸·῎ +30+ : ,¹rº --* . »¼T'(½ ,

56