pp3-6 - of Research Center for the Pacific Islands, Kagoshima

南太平洋海域調査研究報告　No.56（2015年3月）
OCCASIONAL PAPERS　No.56（March 2015）
✀Ꮚᓥ࡟ศᕸࡍࡿᅄ୓༑ᖏࡢ㡫ᒾࡢኚᙧ࡟క࠺≀㉁⛣ື
໭ᮧ᭷㎿ 1, 2࣭ᑠ℈ ㈼ 3࣭ᮧ㔛 ᫭ 3࣭㛗㇂ᕝுኴ 3࣭➟ཎៅᖹ 3࣭┾㑓೺ே 3࣭ᕝ➃カ௦ 4
Mass Transfer Associated with Deformation in Shales from
the Shimanto Belt in Tanegashima Island, Southwest Japan
KITAMURA Yujin1, 2, KOHAMA Ken3, MURASATO Kou3, HASEGAWA Ryota3,
KASAHARA Shimpei3, MANABE Kento3 and KAWABATA Kuniyo4
1: 㮵ඣᓥ኱Ꮫ኱Ꮫ㝔⌮ᕤᏛ◊✲⛉
2: 㮵ඣᓥ኱Ꮫᅜ㝿ᓥᕋᩍ⫱◊✲ࢭࣥࢱ࣮
3: 㮵ඣᓥ኱Ꮫ⌮Ꮫ㒊
4: 㮵ඣᓥ኱Ꮫ⥲ྜ◊✲༤≀㤋
1: Graduate School of Science and Engineering, Kagoshima University
2: Research Center for the Pacific Islands, Kagoshima University
3: Faculty of Science, Kagoshima University
4: Kagoshima University Museum
せ᪨
ᅄ୓༑ᖏࡣ௜ຍయᙧᡂࡸᆅ㟈Ⓨ⏕ࡢᆅ㉁ⓗ⑞㊧ࢆከࡃໟྵࡍࡿࡇ࡜࠿ࡽࠊᾏὒࣉ࣮ࣞࢺࡢỿࡳ㎸ࡳ࡟
క࠺ࣉ࣮ࣞࢺቃ⏺ࡢㅖ⌧㇟ࢆ⌮ゎࡍࡿ㘽࡜࡞ࡿࠋࣉ࣮ࣞࢺቃ⏺ࡢືⓗ⌧㇟ࢆᛕ㢌࡟⨨࠸ࡓ௜ຍయ◊✲ࡣ
༡ᾏࢺࣛࣇἢᓊ࡛⾜ࢃࢀ࡚࠸ࡿࡀࠊ⌰⌫ᾏ⁁ἢ࠸࡛ࡣࡲࡔ⾜ࢃࢀ࡚࠸࡞࠸ࠋᮏ◊✲࡛ࡣ✀Ꮚᓥ࡟࠾࠸࡚ࠊ
ᆅ㉁ㄪᰝ࡜໬Ꮫ⤌ᡂศᯒ࠿ࡽᒾ▼ࡢኚᙧࢆᐃ㔞ࡋࠊࡇࡢᆅᇦࡢ௜ຍయᙧᡂྐࢆ㆟ㄽࡍࡿ஦ࢆ┠ⓗ࡜ࡍࡿࠋ
ㄪᰝࡢ⤖ᯝࠊẚ㍑ⓗ㧗 ࡟ࡉࡽࡉࢀࡓ࡜ᛮࢃࢀࡿ✀Ꮚᓥࡢ㡫ᒾ࡟ࡣᅽຊ⁐ゎࡀⓎ㐩ࡋ࡚࠾ࡾࠊỿࡳ㎸ࡳ࡟
ࡼࡿᇙἐ࡛࡞ࡃࠊ῝ᡂᒾయࡢୖ᪼࡟ࡼࡿ⇕ⓗᙳ㡪ࢆᙉࡃཷࡅ࡚࠸ࡿࡇ࡜ࡀ♧၀ࡉࢀࡓࠋ
ࡣࡌࡵ࡟
ᅄ୓༑ᖏࡣす༡᪥ᮏࡢኴᖹὒഃ࡟ศᕸࡍࡿⓑள⣖࠿ࡽ᪂➨୕⣖࡟ᙧᡂࡉࢀࡓ௜ຍయ࡜࿧ࡤ
ࢀࡿᆅ㉁య࡛࠶ࡿࠋ௜ຍయ࡜ࡣࠊᾏὒࣉ࣮ࣞࢺࡀ኱㝣ࣉ࣮ࣞࢺࡢୗ࡟ỿࡳ㎸ࡴ㝿࡟ࠊᾏὒࣉ
࣮ࣞࢺୖࡢሁ✚≀ࡀࡣࡂྲྀࡽࢀ࡚኱㝣ഃ࡟௜ຍࡋ࡚ᙧᡂࡉࢀࡿᆅ㉁య࡛࠶ࡾࠊ≉࡟す༡᪥ᮏ
ࡣ኱㝣ഃ࠿ࡽኴᖹὒഃ࡟࠿ࡅ࡚㡰࡟᪂ࡋࡃ࡞ࡿࡼ࠺࡟௜ຍయࡀศᕸࡋ࡚࠸ࡿࠋ᪥ᮏิᓥ௜㏆
࡛ࡣ௜ຍయࡀࣉ࣮ࣞࢺቃ⏺ࡢୖ┙ࢆ࡞ࡋࠊࡑࡢᗏ㒊ࡢࣉ࣮ࣞࢺቃ⏺࡛ᾏ⁁ᆺᕧ኱ᆅ㟈ࡀⓎ⏕
ࡍࡿࠋ⌧ᅾᙧᡂ୰ࡢ௜ຍయࡣ༡ᾏࢺࣛࣇࡢἢࡗࡓᾏᗏ࡟ศᕸࡋ࡚࠾ࡾࠊᾏὒ᥀๐࡞࡝ࡢ᪉ἲ
࡛ᆅ㟈◊✲ࡀ⾜ࢃࢀ࡚࠸ࡿࠋᅄ୓༑ᖏࡣ㝣ୖ࡟ᗈࡃศᕸࡋ࡚࠸ࡿࡇ࡜࠿ࡽࠊ⌧ᅾࡢࣉ࣮ࣞࢺ
ቃ⏺⌧㇟ࢆゎࡁ᫂࠿ࡍࡓࡵࡢ㘽࡜ࡋ࡚㔜せ࡛࠶ࡿࠋ
KITAMURA Yujin, KOHAMA Ken, MURASATO Kou, HASEGAWA Ryota, KASAHARA Shinpei, MANABE Kento and KAWABATA Kuniyo
ᮏ◊✲࡛ࡣỿࡳ㎸ࡴࣉ࣮ࣞࢺቃ⏺࡟࠾ࡅࡿᒾ▼ࡢኚᙧࢆᆅ⌫໬Ꮫⓗ࡟ᐃ㔞ࡋࠊኚᙧ࡜࡜ࡶ
࡟≀㉁⛣ືࢆ᫂ࡽ࠿࡟ࡍࡿࠋ≉࡟✀Ꮚᓥᆅᇦࢆᑐ㇟࡜ࡍࡿ஦࡛ࠊ⌰⌫ᾏ⁁ᇦ࡛ࡢࣉ࣮ࣞࢺ
ቃ⏺⌧㇟࡟ࡘ࠸࡚㆟ㄽࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡍࡿࠋ
ᆅ㉁ᴫㄝ
௜ຍస⏝࡟ࡣ 2 ✀㢮࠶ࡾࠊὸ࠸ᡤ࡛ᾏὒࣉ࣮ࣞࢺୖࡢሁ✚≀ࡀ኱㝣ࣉ࣮ࣞࢺ࡟ࡼࡗ࡚๤ࡂ
ྲྀࡽࢀࡿࠕ๤ࡂྲྀࡾ௜ຍࠖ࡜ࠊẚ㍑ⓗ῝࠸ᡤ࡛኱㝣ࡢୗ࡟௜ຍࡍࡿࠕᗏ௜ࡅ௜ຍࠖ࡜࿧ࡤࢀ
ࡿࠋ๤ࡂྲྀࡾ௜ຍ࣭ᗏ௜ࡅ௜ຍࡍࡿ㝿࡟ࡣࠊᆅᒙࡀ᩿ᒙ࡛ษࢀ࡚௜ຍࡍࡿࠋ๤ࡂྲྀࡾ௜ຍࡢ
ሙྜࡣẚ㍑ⓗὸ࠸ሙᡤ࡛㉳ࡇࡾࠊᆅᒙ㸦ሁ✚≀㸧ࡶẚ㍑ⓗᰂࡽ࠿࠸ࡢ࡛᩿ᒙ࡛ษࢀ࡚ࡶ኱ࡁ
࡞ᆅ㟈ࡣ㉳ࡇࡉ࡞࠸ࠋ୍᪉ࠊᗏ࡙ࡅ௜ຍࡣࣉ࣮ࣞࢺቃ⏺᩿ᒙࡢᒅ᭤࡟కࡗ࡚㉳ࡇࡿ࡜⪃࠼ࡽ
ࢀ࡚࠾ࡾࠊᾏ⁁ᆺᕧ኱ᆅ㟈࡜ᐦ᥋࡞㛵㐃ࡀ࠶ࡿ࡜⪃࠼ࡽࢀ࡚࠸ࡿ㸦KITAMURA et al. 2005,
KITAMURA and KIMURA 2012㸧
ࠋᗏ௜ࡅ௜ຍࡉࢀࡓᆅ㉁యࡣ㠀ᖖ࡟ᙉࡃኚᙧࡋ࡚࠾ࡾࠊࢸࢡࢺࢽ
ࢵࢡ࣓ࣛࣥࢪࣗ࡜࿧ࡤࢀࡿ୍✀ࡢ᩿ᒙᒾ࡟࡞ࡗ࡚࠸ࡿࠋᅄ୓༑ᖏ࡟ࡣ๤ࡂྲྀࡾ௜ຍࡉࢀࡓᆅ
㉁య࡜ᗏ௜ࡅ௜ຍࡉࢀࡓᆅ㉁య
㸦ࢸࢡࢺࢽࢵࢡ࣓ࣛࣥࢪࣗ㸧
ࡀࢧࣥࢻ࢖ࢵࢳ≧࡟஺஫࡟
ศ
ᕸࡋ࡚࠸ࡿࠋ
ᅄᅜࡢᅄ୓༑ᖏ࡟࠾ࡅࡿࢸࢡࢺࢽࢵࢡ࣓ࣛࣥࢪࣗࡢ◊✲ࡢ⤖ᯝࠊࡇࡢ࣓ࣛࣥࢪࣗࡣࣉ࣮ࣞ
ࢺቃ⏺ࡢ᩿ᒙኚᙧᖏࡑࡢࡶࡢ࡛࠶ࡗࡓ࡜⪃࠼ࡽࢀ࡚࠸ࡿ㸦KITAMURA et al. 2005㸧
ࠋࡑࡋ࡚ࡑࡢ
࣓ࣛࣥࢪࣗࡢ᭱ୖ㒊࡟≉࡟ኚᙧࡀ㞟୰ࡋࡓ᩿ᒙࡀ࠶ࡾࠊࡑࡇ࠿ࡽᆅ㟈ࡢ໬▼࡜࿧ࡤࢀࡿᆅ㟈
᫬ࡢᦶ᧿⇕࡛⁐⼥ࡋࡓᒾ▼࡛࠶ࡿࢩ࣮ࣗࢻࢱ࢟ࣛ࢖ࢺࡀⓎぢࡉࢀࡓࠋࡇࡢࡇ࡜࠿ࡽࠊࡇࡢ
᩿ᒙࡣ㐣ཤ࡟ᾏ⁁ᆺᕧ኱ᆅ㟈ࢆ㉳ࡇࡋࡓ࡜⤖ㄽ࡙ࡅࡽࢀࡓࠋ
㏆ᖺࡢ◊✲࡛ࠊࢸࢡࢺࢽࢵࢡ࣓ࣛࣥࢪࣗ⮬యࡀ኱つᶍ࡞ࣉ࣮ࣞࢺቃ⏺᩿ᒙᖏ࡛ࠊほ ࡟
ࡼࡗ࡚᭱㏆᫂ࡽ࠿࡟࡞ࡗ࡚ࡁࡓࡺࡗࡃࡾᆅ㟈㸦ࢫ࣮ࣟᆅ㟈㸧ࢆ㉳ࡇࡋࡓྍ⬟ᛶࡀᣦ᦬ࡉࢀ࡚
࠸ࡿ㸦KITAMURA and KIMURA 2012㸧
ࠋࡇࡢࡼ࠺࡟ࠊᅄ୓༑ᖏࡢᒾ▼ࡣᕧ኱ᆅ㟈ࡸᚤᑠ࡞ᆅ㟈ࢆ
㉳ࡇࡍࣉ࣮ࣞࢺቃ⏺ࡢጼࢆ㠀ᖖ࡟≧ែࡼࡃಖᏑࡋ࡚࠸ࡿ࡜⪃࠼ࡽࢀ࡚࠾ࡾࠊ኱㝮ㅖᓥ࡛ࡢㄪ
ᰝࡣ⌰⌫ᾏ⁁ᇦ࡛ࡢᆅ㟈ࡸ௜ຍయᙧᡂ࡟㛵ࡍࡿ♧၀ࢆ࠶ࡓ࠼ࡿࡶࡢ࡜ᮇᚅࡉࢀࡿࠋ
✀Ꮚᓥࡢᆅ㉁ࡣࠊᇶ┙࡜࡞ࡿ⇃ẟᒙ⩌࡜࿧ࡤࢀࡿ◁ᒾࠊ㡫ᒾࡢ஫ᒙࢆ୙ᩚྜ࡟ⱼ㛗ᒙ⩌ཬ
ࡧቑ⏣ᒙࠊ㛗㇂ᒙࠊ➉அᕝᒙࡀそࡗ࡚࠸ࡿ㸦✀ᏊᓥᆅᏛྠዲ఍ 1984㸧
ࠋ⇃ẟᒙ⩌ࡣ㛛಴ᓮᒙࠊ
❧▼ᒙࠊすஅ⾲ᒙ࠿ࡽ࡞ࡾࠊሁ✚ᖺ௦ࡣྂ➨୕⣖ጞ᪂ୡ࡜ࡉࢀࡿࠋ⦓ᐦ࡞ᒾ▼࡛ࠊⲴ㔜⑞ࡸ
₏⑞࡞࡝ࡢሁ✚ᵓ㐀ࡀࡼࡃࡳࡽࢀࠊ᩿ᒙࠊ〩᭤ࡀⓎ㐩ࡋ࡚࠸ࡿࠋⱼ㛗ᒙ⩌ࡣ⏣௦ᒙࠊἙෆᒙࠊ
኱ᓮᒙ࠿ࡽ࡞ࡾࠊሁ✚ᖺ௦ࡣ୰᪂ୡ๓ᮇ࡛࠶ࡿࠋᓥࡢ༡ᮾ㒊࡟ศᕸࡋࠊ໭࡯࡝ᒙཌࡀῶᑡࡍ
ࡿࠋቑ⏣ᒙࠊ㛗㇂ᒙࠊ➉அᕝᒙࡣ඲஧⪅ࢆ୙ᩚྜ࡟そ࠺➨ᅄ⣖ࡢሁ✚≀࡛࠶ࡿࠋ
ㄪᰝ᪉ἲ
✀Ꮚᓥ࡟࠾ࡅࡿᆅ㉁ㄪᰝࢆ 2014 ᖺ 1 ᭶ 23 ᪥㹼25 ᪥ࡢ᪥⛬࡛ᐇ᪋ࡋࡓࠋᓥෆ඲ᇦࡢᆅ㉁ࡢ
㟢ฟ≧ἣࢆ☜ㄆࡋࠊ
Ἶ㉁࡞ᒾ▼ࡀ࠶ࡿሙᡤ࡛ࡣヨᩱ᥇ྲྀࢆ⾜ࡗࡓࠋ
ヨᩱࡣ 4 ࢝ᡤ࡛᥇ྲྀࡋࡓࠋ
Mass Transfer Associated with Deformation in Shales from the Shimanto Belt in Tanegashima Island, Southwest Japan
ヨᩱࡣᩚᙧࡋࢫࣛ࢖ࢻ࢞ࣛࢫ࡟᥋╔ࡋࡓࡢࡕࠊ⣙ 30ȣm ࡢཌࡉࡲ࡛◊☻ࡋ࡚㢧ᚤ㙾ほᐹ⏝
ࡢᒾ▼ⷧ∦ࢆసᡂࡋࡓࠋࡇࢀࢆ㢧ᚤ㙾ୗ࡛ほᐹࡍࡿ஦࡛㖔≀ࡸኚᙧࡢグ㍕ࢆ⾜࠸ࠊᚋ㏙ࡢ
ᅽຊ⁐ゎࢩ࣮࣒ࡢほᐹࢆ⾜࠺ࠋ
ヨᩱࡢ୍㒊ࡣ⢊ᮎ࡟ࡋࡓࡢࡕ⺯ග X ⥺ศᯒࢆ⾜࠸ࠊ୺せඖ⣲ࡢ㔞ẚࢆ ᐃࡍࡿࠋᅽຊ⁐ゎ
ࢩ࣮࣒࡜ඖ⣲⤌ᡂ࠿ࡽୗグࡢ࢔࢖ࢯࢥࣥἲࢆ⏝࠸࡚య✚ኚ໬ࢆホ౯ࡍࡿࠋࡑࡢయ✚ኚ໬ࡀ
ᒾ▼ࡢᅽᐦ࡟ࡼࡿኚᙧ࡟ᐦ᥋࡟㛵ಀࡋ࡚࠸ࡿࡓࡵࠊᆅ㉁᝟ሗ࡜࠶ࢃࡏ࡚✀Ꮚᓥ࡟࠾ࡅࡿ௜ຍ
యᙧᡂྐࢆ㆟ㄽࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋ
࢔࢖ࢯࢥࣥἲ
ᒾ▼ࡢኚᙧࢆ໬Ꮫ⤌ᡂࢹ࣮ࢱࢆඖ࡟య✚ኚ໬࡜ࡋ࡚᥎ᐃࡍࡿᡭἲࢆ࢔࢖ࢯࢥࣥἲ࡜࿧ࡪࠋ
GRESENS㸦1967㸧࡟ࡼࡗ࡚ᥦ᱌ࡉࢀࠊGRANT㸦1986㸧࡟ࡼࡗ࡚☜❧ࡉࢀࡓࠋᅄ୓༑ᖏ࡟࠾࠸
࡚ࡣ KAWABATA et al.㸦2007㸧ࡀ㐺⏝ࡋࠊᆅ㉁యࡢ⿕⇕ ᗘ࡜ᅽຊ⁐ゎࡢⓎ㐩ᗘ࡟┦㛵ࡀ࠶ࡿ
ࡇ࡜ࢆぢ࠸ࡔࡋࡓࠋࡲࡓࠊᗏ௜ࡅࡋࡓ࡜ᛮࢃࢀࡿࢸࢡࢺࢽࢵࢡ࣓ࣛࣥࢪࣗࡣ ᗘୖ᪼࡟ࡼࡗ
࡚ᅽຊ⁐ゎࡢⓎ㐩ࡀᙉࡃಁ㐍ࡉࢀ࡚࠸ࡿࡇ࡜ࡶ♧ࡉࢀࡓࠋ
ᅽຊ⁐ゎ࡜ࡣࠊᒾ▼ࡀᙉ࠸እຊࢆཷࡅࡓ࡜ࡁ࡟ࠊྵࡲࢀࡿ㖔≀ྠኈࡢ᥋ࡍࡿ㒊ศ࡟㐣኱࡞
ᛂຊࡀ࠿࠿ࡾࠊ⁐ฟࡋᣑᩓࡋࡓࡢࡕ㞳ࢀࡓሙᡤ࡟ỿẊࡍࡿ⌧㇟࡛࠶ࡿࠋᒾ▼ⷧ∦ࡢ㙾ୗほᐹ
࡛ࡣࡋࡤࡋࡤ㯮࠸➽≧ࡢᅽຊ⁐ゎࢩ࣮࣒࡜ࡋ࡚ほᐹࡉࢀࡿࠋ
⤖ᯝ
ᆅ㉁ㄪᰝ୰࡟ 14 ᆅⅬ࡛㟢㢌ࢆ☜ㄆࡋ୍㒊࡛ヨᩱ᥇ྲྀࢆ⾜ࡗࡓࠋ
ྛᆅⅬ࡛ࡢᴫせࢆḟ࡟♧ࡍࠋ
Stop 1
すஅ⾲ᕷఫྜྷ௜㏆ࠋ⇃ẟᒙ⩌すஅ⾲ᒙࡢ◁Ἶ஫ᒙࠋྛᒙࡣ⣙㸯cm ⛬ᗘࠋヨᩱࢆ᥇ྲྀ
ࡋࡓ㸦ヨᩱ␒ྕ TNG201501㸧
ࠋ
Stop 2
すஅ⾲ᕷఫྜྷ௜㏆ࠋ⇃ẟᒙ⩌すஅ⾲ᒙ୰ࡢ◁ᒾ࡟ࡢࡇࡿ₏⑞ࠋཌ࠸◁ᒾࡢ㟢㢌࡛
࠶ࡿࡀࠊ㐨㊰ࢆᣳࢇ࡛ᾏᐇഃࡣἾᒾ࡜࡞ࡗ࡚࠸ࡿࠋ
Stop 3
すஅ⾲ᕷ῝ᕝ௜㏆ࠋ⇃ẟᒙ⩌すஅ⾲ᒙࡢ◁ᒾࠋⲴ㔜⑞ࡀㄆࡵࡽࢀࡓࠋ
Stop 4
すஅ⾲ᕷ∾ᕝ௜㏆ࠋ⇃ẟᒙ⩌すஅ⾲ᒙࡢ◁ᒾඃໃ◁Ἶ஫ᒙࠋ◁ᒾᒙ⣙ 4㹼5 cmࠊἾᒾ
ᒙ⣙ 1 cm ⛬ᗘࠋヨᩱࢆ᥇ྲྀࡋࡓ㸦ヨᩱ␒ྕ TNG201502㸧
ࠋ
Stop 5
୰✀Ꮚ⏫Ლ₲௜㏆ࠋ⇃ẟᒙ⩌❧▼ᒙࡢἾᒾඃໃ◁Ἶ஫ᒙࠋἾ㉁㒊ࡣኚᙧࡋࠊᙅኚᡂ
ࡋ࡚࠸ࡿࠋヨᩱࢆ᥇ྲྀࡋࡓ㸦ヨᩱ␒ྕ TNG201503㸧
ࠋ
Stop 6
༡✀Ꮚ⏫ୖ❧▼௜㏆ࠋ⇃ẟᒙ⩌❧▼ᒙࡢ◁Ἶ஫ᒙࠋᯖ≧⁐ᒾࡢ┳ᯈㄆࡵࡿࡶࠊ㟢㢌
ࢆ☜ㄆ࡛ࡁࡎࠋ
Stop 7
༡✀Ꮚ⏫㛛಴ᓁࠋ⇃ẟᒙ⩌㛛಴ᓮᒙࡢከⰍ㡫ᒾࢆྵࡴ◁ᒾ㡫ᒾ஫ᒙࠋ
Stop 8
༡✀Ꮚ⏫⏣௦௜㏆ࠋⱼ㛗ᒙ⩌⏣௦ᒙࠋ⏣௦໬▼㟢㢌ࠋ㩭᪂ୡࡢከ✀ࡢ㈅໬▼ࢆྵࡴ
㌿▼ᵝࡢ㟢㢌ࢆ☜ㄆࠋ⢒⢏ࠥᴟ⢒⢏◁ᒾࠋ
Stop 9
༡✀Ꮚ⏫ୗ୰ᾏᓊࠋⱼ㛗ᒙ⩌Ἑෆᒙࡢ♟ᒾࠥ◁ᒾࠋ♟ᒾ࡟ᩳ஺ⴥ⌮ࢆㄆࡵࡓࠋ
KITAMURA Yujin, KOHAMA Ken, MURASATO Kou, HASEGAWA Ryota, KASAHARA Shinpei, MANABE Kento and KAWABATA Kuniyo
Stop 10 ༡✀Ꮚ⏫➉ᓮ௜㏆ࠋⱼ㛗ᒙ⩌኱ᓮᒙࠋ㐨㊰ษࡾ㏻ࡋࡢ㟢㢌ࠋ㔜ᶵ࡟ࡼࡿ᧿⑞࡟ἢࡗ
࡚⻏ࡢᕢ≧㢼໬ࡀ㐍⾜ࡋ࡚࠸ࡿ࡜ᛮࢃࢀࡿ⏘≧ࢆㄆࡵࡓࠋ
Stop 11 ༡✀Ꮚ⏫὾⏣௜㏆ࠋ༓ᗙࡢᒾᒇࠋⱼ㛗ᒙ⩌኱ᓮᒙ࡟Ⓨ㐩ࡋࡓᾏ㣗Ὕࠋ
Stop 12 ୰✀Ꮚ⏫≟ᇛᾏᓊࠋ㤿❧ࡢᒾᒇࠋⱼ㛗ᒙ⩌኱ᓮᒙ࡟Ⓨ㐩ࡋࡓᾏ㣗Ὕࠋ
Stop 13 すஅ⾲ᕷ႐ᚿ㮵ᓮࠋ⇃ẟᒙ⩌すஅ⾲ᒙࡢሢ≧◁ᒾࠋࢱ࣐ࢿࢠ≧㢼໬ࠊ⻏ࡢᕢ≧㢼໬
ࡀⓎ㐩ࡋ࡚࠸ࡿࠋᾏᓊẁୣୖ࡟ࡣἾ㉁ᒾࡢ㟢ฟ᭷ࡾࠋ
Stop 14 すஅ⾲ᕷୖྂ⏣௜㏆ࠋ⇃ẟᒙ⩌すஅ⾲ᒙࡢ◁Ἶ஫ᒙࠋ㡫ᒾᵝ࡛㯮Ⰽ⦓ᐦ࡞ᒾ▼࡟๼
㛤ࡀⓎ㐩ࠋ◁Ἶྛᒙࡣᩘ m ࠿ࡽᩘ༑ m ࡢཌࡉࢆᣢࡘࠋヨᩱࢆ᥇ྲྀࡋࡓ㸦ヨᩱ␒ྕ
TNG201504㸧
ࠋ
᥇ྲྀࡋࡓヨᩱࡢᒾ▼ⷧ∦ࢆసᡂࡋほᐹࡋࡓ࡜ࡇࢁࠊྛヨᩱࡣ○ᒌ≀࠿ࡽ࠿ࡽ࡞ࡾࠊ▼ⱥࡸ
ᒾ∦ࡀ༟㉺ࡋ࡚࠸ࡿࠋᡤࠎ࡟㯮࠸➽≧ࡢᵓ㐀ࡀ☜ㄆࡉࢀࠊᅽຊ⁐ゎࢩ࣮࣒࡜ᛮࢃࢀࡿࠋ
ࡲ࡜ࡵ
✀Ꮚᓥ࡛ࡢᆅ㉁ㄪᰝ࡟ࡼࡾࠊᅄ୓༑ᖏࢆᵓᡂࡍࡿ୺せ࡞㒊ศࡀ◁Ἶ஫ᒙ࡛࠶ࡿࡇ࡜ࡀ☜ㄆ
ࡉࢀࡓࠋἾ㉁㒊ࡣᙅኚᡂࢆཷࡅ࡚࠸ࡿ࡜ᛮࢃࢀࠊ⦓ᐦ࡛๼㛤ࡀⓎ㐩ࡋࡓ㡫ᒾ࡜࿧ࡪ࡭ࡁ⏘≧
ࡢࡶࡢࡀከࡃㄆࡵࡽࢀࡓࠋ㝣ୖ࡟㟢ฟࡍࡿᅄ୓༑ᖏ࡜ࡋ࡚ࡣᾏ⁁ᐤࡾ࡟఩⨨ࡍࡿ࡟ࡶ㛵ࢃࡽ
ࡎኚᡂᗘࡀ㧗࠸ࡢࡣࠊỿࡳ㎸ࡳ࡟క࠺ᇙἐࡼࡾࡶูࡢ⇕ⓗせᅉࡀ⪃࠼ࡽࢀࡿࠋᒇஂᓥ࡟㈏ධ
ࡋࡓ῝ᡂᒾయࡀࡑࡢ୍ᅉ࡜⪃࠼ࡽࢀࡿࠋ⇕ⓗᙳ㡪ࢆཷࡅࡓࡇ࡜࡟ࡼࡾᅽຊ⁐ゎࡢⓎ㐩ࡶಁ㐍
ࡋࡓ࡜⪃࠼ࡽࢀࠊ௒ᚋ໬Ꮫ⤌ᡂศᯒ࡟ࡼࡗ࡚య✚ኚ໬ࡀᐃ㔞ࡉࢀࢀࡤ✀Ꮚᓥᆅᇦࡢᅄ୓༑ᖏ
ࡢᆅྐ᚟ඖࡢ୍ຓ࡟࡞ࡿ࡛࠶ࢁ࠺ࠋ
ᘬ⏝ᩥ⊩
GRANT, J. A. 1986. The Isocon Diagram; A Simple Solution to Gresens’s Equation for Metasomatic
Alteration. Economic Geology, 81(8): 1976-1982.
GRESENS, R. 1967. Composition-Volume Relationships of Metasomatism. Chemical Geology, 2: 47-65.
KAWABATA, K., TANAKA, H. and KIMURA, G. 2007. Mass Transfer and Pressure Solution in Deformed
Shale of Accretionary Complex: Examples from the Shimanto Belt, Southwestern Japan. Journal
of Structural Geology, 29: 697-711.
KITAMURA, Y. and KIMURA, G. 2012. Dynamic Role of Tectonic Mélange during Interseismic Process
of Plate Boundary Mega Earthquakes. Tectonophysics, 568-569: 39-52.
KITAMURA, Y., SATO, K., IKESAWA, E., IKEHARA-OHMORI, K., KIMURA, G., KONDO, H., UJIIE, K.,
ONISHI, C. T., KAWABATA, K., HASHIMOTO, Y., MUKOYOSHI, H. and MASAGO, H. 2005. Mélange
and Its Seismogenic Roof Décollement: A Plate Boundary Fault Rock in the Subduction
Zone—An Example from the Shimanto Belt, Japan. Tectonics, 24(5): TC5012.
✀ᏊᓥᆅᏛྠዲ఍⦅ 1984㸬✀Ꮚᓥࡢᆅ㉁㸪124 㡫㸪すஅᓥᕷᩍ⫱ጤဨ఍㸪㮵ඣᓥ㸬