基于统计检验法研究Amurian板块相对独立性

Amurian 板块是Zonenshain等提出的提出的东北亚地区内部一个构造亚板块.Amurian板块自提出以来就一直受到地学界的广泛重视.它到底是欧亚大陆的一部分,还是独立于欧亚大陆之外的一个独立次级构造块体?这个问题一直是是东亚,乃至欧亚大陆构造动力学研究的核心问题之一.许多学者从地质和地球物理学两个角度研究了Amurian板块存在的可能性.但是复杂的构造特征和稀少且弥散的地震分布使得Amurian问题充满了争议.全球卫星定位系统(GPS)技术的不断进步使得在短时间获得高精度、大范围、准实时的地壳运动观测数据,并确定地壳运动速度场成为可能.本文利用东北亚地区最新GPS资料,从大地测量学角度对东北亚地区的地壳运动特征进行分析,基于统计检验方法重点研究Amurian板块相对欧亚大陆的独立性及其边界等问题.

Research on the existence of Amurian plate based on statistical tests

The Amurian Plate was proposed by Zonenshain as a microplate within the Northeast Asia. Many issues concerning the Amurian Plate, such as whether the Amurian Plate exists, where its southern boundary is, are presently highly debated. Although many scholars employed the evidence of geology and geophysics to conduct research on the possibility about the existence of Amuria. Nevertheless, complicated tectonic characteristics as well as seldom and dispersed seismic activities make the issue of Amurian plate a problem full of disputation. With the improvement of Global Positioning System (GPS), the GPS observations can provide high-precision, large-scale, quasi real-time and quantitative data of crust movement, and make obtaining large-scale velocity field of crust movement in a short time possible. In this paper, based on the new GPS data and statistics tests, we conducted significance tests to investigate whether Amuria is a part of the Eurasia (EU) or a separate block which is independent from EU and to define the ambiguous southern boundary of the Amuria.