ELASTIC WAVE VELOCITY OF ROCKS AT HIGH PRESSURE AND TEMPERATURE AND PETROLOGICAL MODEL OF CRUSTAL STRUCTURES

高温高压下岩石弹性波速与地壳结构岩石模型

• 批准号: 12440147
• 负责人: ARIMA Makoto
• 金额: $ 6.91万
• 依托单位: YOKOHAMA NATIONAL UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12440147/
• 关键词: seismic velocity; ultrasonic; island arc; continent; crust; tonalite; gabbro; granulite; 島孤地殻断面; ピストンシリンダー装置; 地震波速度異方性; 伊豆弧; コヒスタン島弧; 幌満カンラン岩体; 弾性波速度; 高圧高温; 大陸地殻; 島弧地殻; 伊豆小笠原弧; 東北本州弧; 岩石学的地殻断面モデル

In order to better constrain the interpretation of the seismic structures, experimental measurements at high pressure (up to 1000 Mpa) and temperature (up to 1000□) of the compressional wave velocity (Vp) and shear wave velocity (Vs) on rock samples representative of deep crustal lithologies from the Mount Tanzawa (central Japan), Ichinomegata (NE Japan), Kohistan paleo-crustal section (northern Pakistan), Lutzow-Holm Bay and Enderby Land (East Antarctica) have been performed.The main results are :(1) Vp of the garnet clinopyroxenite decreases linearly from room temperature to 800 ℃, and decreases rapidly at temperatures higher than 800 ℃. Vp of the dunite decreases linearly from room temperature to 1000 ℃. Vp of the garnet clinopyroxenite is 7.74 km/s at room temperature, 7.70 km/s at 400 ℃, 7.66 km/s at 700 ℃, and 7.45 km/s at 1000 ℃. Vp of the dunite is 8.49 km/s at room temperature, 8.30 km/s at 400 ℃, 8.12 km/s at 700 ℃, and 7.90 km/s at 1000 ℃. Temperature derivative of Vp is-1.24 10-4 km/s℃ for the garnet clinopyroxenite and -6.06 10-4 km/s℃ for the dunite.(2) At constant pressure of 1.0 Gpa, the Vp of hornblende gabbro gradually decreased from 7.21 km/s at 25 ℃ to 6.91 km/s at 700 ℃. Similarly the Vp values of the pyroxene-hornblende gabbros reduces from 7.06 km/s at 25 ℃ to 6.73 km/s 800 ℃. Also the Vp value of the hornblendite lowers from 7.11 km/s (25 ℃) to 6.45 km/s (800 ℃).

为了更好地约束地震构造的解释，高压下的实验测量（最高1000 Mpa）和温度代表Tanzawa山深部地壳岩性的岩石样品上的纵波速度（Vp）和横波速度（Vs）（高达1000□）（日本中部），Ichinomegata（日本东北部），科希斯坦古地壳剖面（巴基斯坦北方）、Lutzow-Holm湾和恩德比地（东南极洲）进行了研究，主要结果如下：（1）石榴单斜辉石的Vp从室温到800 ℃呈线性下降，在800 ℃以上迅速下降。纯橄榄岩的Vp从室温到1000 ℃呈线性下降。石榴单斜辉石岩的Vp在室温下为7.74 km/s，在400 ℃下为7.70 km/s，在700 ℃下为7.66 km/s，在1000 ℃下为7.45 km/s。纯橄榄岩的Vp在室温下为8.49 km/s，在400 ℃下为8.30 km/s，在700 ℃下为8.12 km/s，在1000 ℃下为7.90 km/s。单斜辉石岩的Vp温度导数为-1.24 × 10 ~（-4）km/s℃，纯橄榄岩的Vp温度导数为-6.06 × 10 ~（-4）km/s℃。(2)在1.0Gpa恒压条件下，角闪辉长岩的Vp由25 ℃时的7.21km/s逐渐降低到700 ℃时的6.91km/s。辉石-角闪石辉长岩的Vp值从25 ℃时的7.06km/s降低到800 ℃时的6.73km/s。角闪石的Vp值从7.11km/s（25 ℃）降低到6.45km/s（800 ℃）。

项目成果

Ishikawa,M.,Kaneko,Y.,Anma,R.Yamamoto,H.: "Subhorizontal boundary between ultrahigh-and low-pressure units in the Sulu-Tjubearea of the Kokchetav massif, Kazakhstan."The Island Arc.. 9巻. 317-327 (2000)

Ishikawa, M.、Kaneko, Y.、Anma, R. Yamamoto, H.：“哈萨克斯坦科克切塔夫地块苏禄-朱贝尔地区超高压和低压单元之间的地下边界。”岛弧.. 9 卷.317-327 (2000)

K.KITAMURA, M.ISHIKAWA, M.ARIMA, K.SHIRAISHI: "Laboratory measurements of P-wave velocity of granulites from Luzow-Holm Complex, East Antarctica : Preliminary report"Polar Geosciences. 14. 180-194 (2001)

K.KITAMURA、M.ISHIKAWA、M.ARIMA、K.SHIRAISHI：“东南极洲 Luzow-Holm 复合体麻粒岩 P 波速度的实验室测量：初步报告”极地地球科学。

SINGH,P,ARIMA,M and GUPTA,A.K.: "Phase Equilibrium Constraints on the Petrogenesis of Nephelinites with reference to the system diopside-nepheline under variable P-T conditions in the presence or absence of water."Journal of Mineralogical and Petrological

SINGH,P,ARIMA,M 和 GUPTA,A.K.：“在存在或不存在水的情况下，在可变 P-T 条件下，参照透辉石-霞石系统，霞石岩岩石成因的相平衡约束。”矿物学与岩石学杂志

Pati, J., Arima, Gupta, A.K: "Experimental study of the Diopside-Albite-Nepherine join under28, 10 and 20 kbar (in presence of excess water) and its significance"Canadian Mineralogist. 38. 1177-1191 (2000)

Pati, J.、Arima、Gupta, A.K：“透辉石-钠长石-霞石连接在 28、10 和 20 kbar（存在过量水的情况下）的实验研究及其意义”加拿大矿物学家。

石川正弘, 新開英介, 有馬 眞: "南極大陸地殻物質の高圧地震波速度測定実験"月刊地球. 号外35号. 70-76 (2002)

Masahiro Ishikawa、Eisuke Shinkai、Makoto Arima：“测量南极洲地壳物质中高压地震波速度的实验”月刊特刊第 35 期。70-76 (2002)。