P and S wave velocities of deep crustal rocks under high pressure and high temperature conditions
高压高温条件下深部地壳岩石纵横波速度
基本信息
- 批准号:15540457
- 负责人:
- 金额:$ 1.86万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2003
- 资助国家:日本
- 起止时间:2003 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
We carry out research on the elastic properties of the crustal rocks using ultrasonic measurements. We have developed techniques to perform ultrasonic measurements at mid-to-lower crustal conditions of pressure and temperature. These techniques are now been applied to study the major crustal rocks, including gabbro, tonalite, granite, anorthosite, granulite and amphibolite, which were collected from (1)island arc deep crustal sections of Tanzawa Mountain of central Japan and Kohistan area of Pakistan, (2)Ichinomegata of NE Japan, Takashima and Kurose of SW Japan, and (3)Archean ultra-high temperature granulite-facies complex (Napier Complex) and Pan-African erogenic belt (Lutzow-Holm Complex) of East Antarctica. In order to interpret seismic structure of island arcs NE Honshu arc, the Vp values measured at lower temperatures than those of mid-to-lower crusts were compared with the seismic velocity profiles which were adjusted to value at 25 □ by following the temperature derivative giv … More en by Rudnick and Fountain (1995) and employing the geothermal gradient (Nishimoto et al.,2005). In order to compare directly to seismic velocities at the deep island arc pressures and temperatures, we developed ultrasonic velocity measurements using buffer rod technique. The measurements have doubled the temperature range of previous ultrasonic measurements on rocks. Pt buffer rod is used to isolate the piezoelectric transducer from the high-temperature condition. Travel times through the rock sample were determined with the pulse reflection technique. Kono et al.(2004a) measured compressional wave velocities (Vp) of gabbronorite, pyroxene granulite, wehrlite and websterite up to 1000□ at 1 GPa and found discontinuous change in temperature derivative of Vp in lower crustal rocks arc This reversible and discontinuous change is difficult to explain by the previously proposed mechanisms, such as thermal cracking, dehydration reaction, and/or partial melting. The data suggest that this reversible and discontinuous change would be associated with phase transition in plagioclase (Kono et al.2004b). Less
我们利用超声波测量技术对地壳岩石的弹性性质进行了研究。我们已经开发出在中低地壳压力和温度条件下进行超声波测量的技术。这些技术现已应用于研究主要地壳岩石,包括辉长岩、英云闪长岩、花岗岩、斜长岩、麻粒岩和角闪岩,它们取自(1)日本中部的Tanzawa山和巴基斯坦的Kohistan地区的岛弧地壳深部剖面,(2)日本东北部的Ichinomegata,日本西南部的Takashima和Kurose,东南极太古宙超高温麻粒岩相杂岩(纳皮耶杂岩)和泛非造山带(Lutzow-Holm杂岩)。为了解释本州岛弧东北部的地震结构,将在比中下地壳温度低的温度下测得的Vp值与地震速度剖面进行了比较。 ...更多信息 由Rudnick和Fountain(1995)提出并采用地热梯度(Nishimoto等人,2005年)。为了直接比较地震速度在深岛弧的压力和温度,我们开发了超声波速度测量使用缓冲棒技术。这些测量使以前对岩石进行超声波测量的温度范围翻了一番。铂缓冲棒用于将压电换能器与高温环境隔离。通过岩石样品的旅行时间用脉冲反射技术测定。Kono等人(2004 a)在1GPa下测量了辉长岩、辉石麻粒岩、硅铝石和镁橄榄石的压缩波速度(Vp)高达1000□,发现下地壳岩石弧中Vp温度导数的不连续变化。这种可逆且不连续的变化很难用以前提出的机制来解释,例如热破裂、脱水反应和/或部分熔融。这些数据表明,这种可逆和不连续的变化与斜长石的相变有关(Kono等人,2004 b)。少
项目成果
期刊论文数量(50)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
金尾雅紀, 石川正弘: "先カンブリア・クラトンの深部構造-グローバルレビュー"月刊地球. 288. 475-479 (2003)
Masaki Kanao、Masahiro Ishikawa:“前寒武纪克拉通的深层结构 - 全球评论”地球月刊 288. 475-479 (2003)。
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石川正弘: "パンアフリカン造山帯の下にリソスフェアはあるのか?"月刊地球. 288. 480-484 (2003)
Masahiro Ishikawa:“泛非洲造山带下方是否存在岩石圈?” 地球月刊 288. 480-484 (2003)
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Discontinuous change in temperature derivative of Vp in lower crustal rocks
下地壳岩石中Vp温度导数的不连续变化
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:Kono Y.;Ishikawa;M.;Arima M.
- 通讯作者:Arima M.
Marked Decrease in Vp of Anorthosite above 400 ℃
400℃以上斜长石Vp显着降低
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:Kono Y.;Ishikawa;M.;Arima M.
- 通讯作者:Arima M.
Kitamura, K., Ishikawa, M., Arima, M.: "Petrological model of the northern Izu-Bonin-Mariana (IBM) arc crust : constraints from high-pressure measurements of elastic-wave velocities of the Tanzawa plutonic rocks, central Japan"Tectonophysics. 371. 213-221
Kitamura, K.、Ishikawa, M.、Arima, M.:“北伊豆-小笠南-马里亚纳 (IBM) 弧地壳的岩石学模型:丹泽深成岩弹性波速度高压测量的约束,中部
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ISHIKAWA Masahiro其他文献
北部マリアナ前弧域から採取されたかんらん岩の微細構造解析
北马里亚纳弧前地区橄榄岩的微观结构分析
- DOI:
- 发表时间:
2016 - 期刊:
- 影响因子:0
- 作者:
TSUBOKAWA Yumiko;ISHIKAWA Masahiro;KAWAKAMI Tetsuo;HOKADA Tomokazu;SATISH-KUMAR M.;TSUCHIYA Noriyoshi;GRANTHAM Geoffrey H.;針金由美子・石塚 治・前川寛和 - 通讯作者:
針金由美子・石塚 治・前川寛和
Pressure–temperature–time path of a metapelite from Mefjell, Sør Rondane Mountains, East Antarctica
东南极洲南龙达讷山脉 Mefjell 变泥岩的压力-温度-时间路径
- DOI:
10.2465/jmps.160919 - 发表时间:
2017 - 期刊:
- 影响因子:0.7
- 作者:
TSUBOKAWA Yumiko;ISHIKAWA Masahiro;KAWAKAMI Tetsuo;HOKADA Tomokazu;SATISH-KUMAR M.;TSUCHIYA Noriyoshi;GRANTHAM Geoffrey H. - 通讯作者:
GRANTHAM Geoffrey H.
Understanding the processes of the mutiple subduction plate boundary around Japan
了解日本周围多俯冲板块边界的过程
- DOI:
- 发表时间:
2016 - 期刊:
- 影响因子:0
- 作者:
TSUBOKAWA Yumiko;ISHIKAWA Masahiro;KAWAKAMI Tetsuo;HOKADA Tomokazu;SATISH-KUMAR M.;TSUCHIYA Noriyoshi;GRANTHAM Geoffrey H.;針金由美子・石塚 治・前川寛和;Nakamura H - 通讯作者:
Nakamura H
東赤道太平洋IODP Site U1338における鮮新世の浮遊性有孔虫群集と古海洋
赤道东太平洋上新世浮游有孔虫组合和古海洋学 IODP Site U1338
- DOI:
- 发表时间:
2017 - 期刊:
- 影响因子:0
- 作者:
TSUBOKAWA Yumiko;ISHIKAWA Masahiro;KAWAKAMI Tetsuo;HOKADA Tomokazu;SATISH-KUMAR M.;TSUCHIYA Noriyoshi;GRANTHAM Geoffrey H.;川口慶一郎・林 広樹 - 通讯作者:
川口慶一郎・林 広樹
ISHIKAWA Masahiro的其他文献
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{{ truncateString('ISHIKAWA Masahiro', 18)}}的其他基金
Effect of water on elastic wave velocities of crustal materials: implications for distribution of water in seismogenic crust
水对地壳物质弹性波速度的影响:对地震地壳中水分布的影响
- 批准号:
19540502 - 财政年份:2007
- 资助金额:
$ 1.86万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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