冲绳海槽及邻区磁异常特征及其地质解释

发布时间：2017-12-27 00:05

本文关键词：冲绳海槽及邻区磁异常特征及其地质解释　出处：《海洋科学》2016年05期 　论文类型：期刊论文

【摘要】：对冲绳海槽及邻区的ΔT磁异常特征进行了定性分析和变纬度化极处理,通过对比ΔT磁异常和化极磁异常分布特征,对冲绳海槽及邻区几个构造地质学问题进行了探讨。冲绳海槽基底埋深较大,沉积中心位于海槽西部;钓鱼岛隆褶带大规模基底隆起的南端终止于渔山-久米断裂带,断裂带以南的东海陆架南部边缘覆盖了厚层沉积物;以渔山-久米断裂带、舟山-国头断裂带和吐噶喇断裂带为代表的NW-NWW向右旋平移断裂带在东海构造演化过程中自西向东逐渐前展,对构造应力场起到了重要的调节作用,是东海"南北分块"构造格局中主要的构造单元边界;中新世以来台湾碰撞造山作用引起了东海陆架南部主要构造单元的顺时针旋转;菲律宾海板块的俯冲对琉球弧前地区的磁异常分布产生了显著影响。
[Abstract]:The characteristics of the magnetic anomalies in the Okinawa trough and its adjacent areas are qualitatively analyzed and the latitudinal pole processing is carried out. By comparing the distribution characteristics of the T magnetic anomalies and the magnetic pole anomalies, several structural geological problems in the Okinawa trough and its adjacent areas are discussed. The Okinawa trough basement buried depth, sedimentary center is located in the Western trough; the Diaoyu Islands foldng zone at the southern end of large-scale basement uplift terminated in Yushan - Kume fault zone, with the southern edge of the South East China Sea shelf covering the thick layer of sediment to fracture; Yushan - Kume fault zone, Zhoushan - China head fracture and the Tokara fault zone NW-NWW fracture with right lateral translation represents the tectonic evolution in the East China Sea from west to east gradually before the show, the tectonic stress field plays an important role in the regulation of the East China Sea, "North South Block" boundaries of tectonic units main tectonic pattern in Taiwan; since the Miocene collision orogeny caused southern continental shelf of the East China Sea the main tectonic units in the clockwise rotation; Philippines sea subduction of the Ryukyu Island Arc area of the magnetic anomaly distribution has significant influence.
【作者单位】：中国海洋大学环境科学与工程学院;青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室;青岛海洋地质研究所;
【基金】：国家重点基础研究发展计划项目(2013CB429701) 国家自然科学基金项目(41506080)~~
【分类号】：P736.1
【正文快照】： 冲绳海槽位于东海陆架与琉球岛弧之间,是东海隆-坳相间构造格局的重要组成部分,西以钓鱼岛隆褶带与东海陆架盆地相隔,西南端紧邻的台湾山脉是全球最年轻的碰撞造山带之一。对冲绳海槽及邻区构造地质特征进行研究,是揭示板块俯冲背景下构造运动迁移、探索碰撞造山与弧后张裂相

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