Multichannel Seismic Survey of the Central Izu-Bonin Arc
Multichannel Seismic Survey of the Central Izu-Bonin Arc
复制标题
伊豆-小笠原岛弧中部多道地震勘探
DOI：
10.2973/odp.proc.ir.126.105.1990
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
M. E. Mackay
中科院分区：
文献类型：
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作者：
B. Taylor;G. Moore;A. Klaus;M. Systrom;P. Cooper;M. E. Mackay
在伊豆-小笠原岛弧中心收集了多道地震（MCS）数据，为大洋钻探计划的第125和126航段做准备，并作为我们继续研究大洋内弧-海沟系统演变的一部分（图1）。我们的地震调查集中在弧，弧前，弧后形成，构造和沉积的过程。在弧前盆地，MCS数据提供洞察盆地形成的性质和模式，岩石圈弯曲，弧火山负荷，弧前沉积过程和演化的结果。在弧/弧后地区的MCS调查解决的主要问题包括弧火山作用和弧后裂谷盆地沉积，断层和火山作用的性质和风格。关于伊豆-小笠原岛弧的构造演化的概要，请参见本卷“导言”一章。在本文中，我们展示了我们对Sumisu裂谷（剖面3-6、8、9、13和14）和前弧外弧高部分（剖面1-5和8-14;图2）的调查中处理过的MCS数据。对海沟坡度MCS数据的解释见Horine等人（出版中）。介绍我们对弧后裂谷和弧前盆地MCS数据的解释的论文正在编写中。MCS数据和126航次钻井结果的详细对比在本卷各现场章节的“地震地层学”部分中介绍。
Multichannel seismic (MCS) data were collected in the central Izu-Bonin island arc in preparation for Legs 125 and 126 of the Ocean Drilling Program, and as part of our continuing research into the evolution of intraoceanic arc-trench systems (Fig. 1). Our seismic investigation focused on the processes of arc, forearc, and backarc formation, tectonics, and sedimentation. In the forearc basin, the MCS data provide insights into the nature and mode of basin formation, lithospheric flexure that results from arc volcano loading, and forearc sedimentation processes and evolution. Major issues addressed by the MCS survey in the arc/backarc region include the nature and style of arc volcanism and backarc rift-basin sedimentation, faulting, and volcanism. For an overview of the tectonic evolution of the Izu-Bonin Arc, see the "Introduction" chapter (this volume). In this paper we present the processed MCS data from our surveys of the Sumisu Rift (Profiles 3-6, 8, 9, 13, and 14) and the arc to outerarc high portion of the forearc (Profiles 1-5 and 8-14; Fig. 2). Interpretations of the trench-slope MCS data appear in Horine et al. (in press). Papers presenting our interpretation of the backarc rift and forearc basin MCS data are in preparation. Detailed correlations of the MCS data and the Leg 126 drilling results are presented in the "Seismic Stratigraphy" sections of each site chapter in this volume.