種子島に分布する四万十帯の頁岩の変形に伴う物質移動

種子島に分布する四万十帯の頁岩の変形に伴う物質

移動

著者

北村 有迅, 小濱 賢, 村里 晃, 長谷川 亮太, 笠原

慎平, 眞邉 健人, 川端 訓代

雑誌名

南太平洋海域調査研究報告=Occasional papers

巻

56

ページ

3-6

別言語のタイトル

Mass Transfer Associated with Deformation in

Shales from the Shimanto Belt in Tanegashima

Island, Southwest Japan

✀Ꮚᓥ࡟ศᕸࡍࡿᅄ୓༑ᖏࡢ㡫ᒾࡢኚᙧ࡟క࠺≀㉁⛣ື

Mass Transfer Associated with Deformation in Shales from

the Shimanto Belt in Tanegashima Island, Southwest Japan

KITAMURAYujin1, 2, KOHAMAKen3, MURASATOKou3, HASEGAWARyota3,

KASAHARAShimpei3, MANABEKento3and KAWABATAKuniyo4

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

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,

KITAMURAand KIMURA2012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_KITAMURAet 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_{KITAMURAand KIMURA2012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☜ㄆࡋࠊἾ㉁࡞ᒾ▼ࡀ࠶ࡿሙᡤ࡛ࡣヨᩱ᥇ྲྀࢆ⾜ࡗࡓࠋヨᩱࡣ_{4 ࢝ᡤ࡛᥇ྲྀࡋࡓࠋ} 

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᱌ࡉࢀࠊG}RANT㸦_{1986㸧࡟ࡼࡗ࡚☜❧ࡉࢀࡓࠋᅄ୓༑ᖏ࡟࠾࠸} ࡚ࡣ_KAWABATAet 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ࡗࡓࠋྛᆅⅬ࡛ࡢᴫ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

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⏝ᩥ⊩

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KITAMURA, Y., SATO, K., IKESAWA, E., IKEHARA-OHMORI, K., KIMURA, G., KONDO, H., UJIIE, K.,

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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}