Crustal tilting derived from Holocene sea‐level observations along the east coast of Hokkaido in Japan and upper mantle rheology
Crustal tilting derived from Holocene sea‐level observations along the east coast of Hokkaido in Japan and upper mantle rheology
复制标题
日本北海道东海岸全新世海平面观测及上地幔流变学的地壳倾斜
DOI：
10.1029/92gl00936
复制
发表时间：
1992
影响因子：
5.2
通讯作者：
I. Matsuda
中科院分区：
文献类型：
--
作者：
Y. Maeda;M. Nakada;E. Matsumoto;I. Matsuda
日本北海道东海岸晚全新世海平面观测表明，相对海平面向东向根室半岛顶端逐渐降低。在地震活跃区的这些观测结果可以用冰川水均衡调整来解释，这是由于地球模型的最后一次冰消作用造成的，该模型的岩石圈厚度为30-40公里，没有低粘度层，或者岩石圈厚度为25公里，低粘度层厚度小于50公里，尽管需要更多的数据作为时间的函数来区分这些模型。因此，与太平洋板块俯冲有关的地壳垂直位移似乎没有在103-104年的时间尺度上累积。
Late Holocene sea-level observations at sites along the east coast of Hokkaido in Japan indicate a gradual decrease of the altitude of relative sea-level eastward toward the tip of Nemuro Peninsula. These observations in seismically active areas can be explained by glaciohydroisostatic adjustment due to the last deglaciation for an Earth model with a thin lithosphere of 30–40 km thickness and with no low viscosity layer, or with a 25 km lithosphere overlying a low viscosity layer less than 50 km, although more data as a function of time are needed to distinguish these models. Thus the vertical crustal displacement associated with the subduction of the Pacific plate seems to has not been cumulated on a time scale of 103–104 years.