Late Holocene eustatic sea-level changes deduced from geomorphological features and their 14C dates in the Ryukyu Islands, Japan
Late Holocene eustatic sea-level changes deduced from geomorphological features and their 14C dates in the Ryukyu Islands, Japan
复制标题
日本琉球群岛地貌特征及其14C年代推导的全新世晚期海平面升降变化
DOI：
10.1016/0031-0182(82)90024-4
复制
发表时间：
1982
期刊：
影响因子：
--
通讯作者：
Tatsuo Takahashi
中科院分区：
文献类型：
--
作者：
M. Koba;M. Koba;T. Nakata;T. Nakata;Tatsuo Takahashi;Tatsuo Takahashi
本文在不假设上升速率为常数的情况下，根据琉球群岛（一个活动岛弧）几乎所有全新世上升珊瑚礁的14 C测年和现今海平面，推导了晚全新世海平面的变化。稳定的相对海平面，通过使用海平面指标，如珊瑚礁阶地，珊瑚化石，波浪切割缺口和海滩岩石恢复。从一个沉积阶地表面采集的碳酸钙化石的最古老和最古老的14 C年龄表明了它们的形成时期，当比较13个岛屿的相对海平面变化时，琉球群岛按各岛全新世隆起礁阶地形成时期的最古老年龄，即6500年B. P.，5000年B. P.，三个岛群阶地形成的最年轻期相互对应。一种解释了地震隆升和三个岛群台地面的形成过程。从6500年到3500年B. P.，海平面继续普遍上升。大约6500年B. P. 5000 - 3500年B. P.，3500 - 1700年B. P.，海平面上升的速度变慢了。3500 - 1700年B. P.之间的海平面是稳定的，它一直是最高的全新世。全新世各岛屿的隆升速率估计是过去12.5万年隆升速率的1/2 ~ 3倍。晚全新世三个岛群的隆升速率被推断为呈指数下降。文中还进一步讨论了地壳运动和隆起珊瑚礁的分布。
This paper deduces late Holocene eustatic sea-level changes from14C dates and present elevations of almost all Holocene raised coral reefs in the Ryukyu Islands (an active island arc), without the assumption of a constant uplift rate. Stable relative sea levels, are restored by using sea-level indicators, such as raised coral reef terraces, fossil coral, wave-cut notches, and beach rock. The oldest and the youngest14C ages of calcium carbonate fossils, collected from a depositional terrace-surface, show their formative period.When all relative sea-level changes of thirteen islands are compared, the Ryukyu Islands form three groups according to the oldest age in the formative period of the Holocene raised reef terraces in each island, that is 6500 yr B.P., 5000 yr B.P., and 3500 yr B.P. The youngest of the terrace-formative periods in the three island groups correspond with each other. One eustasy explains the seismic upheaval and the formative process of the terrace-surfaces of the three island groups.The eustatic sea-level trend in the Ryukyu Islands can be summarized as follows. From 6500 to 3500 yr B.P., the sea level continued to rise generally. Around 6500 yr B.P., 5000 to 3500 yr B.P., and 3500 to 1700 yr B.P., the rates of sea-level rise became slower. The sea level between 3500 and 1700 yr B.P. was stable and it has been the highest in the Holocene. At that time its height was less than 1.0 m above the present sea level.The Holocene uplift rate of each island is estimated to be half to three times as great as that of the last 125 000 years. The uplift rates of the three island groups in the late Holocene are inferred to have been decreasing exponentially. The crustal movement and the distribution of raised coral reefs are further discussed here.
琉球群岛（西南诸岛）
DOI：
--
发表时间：
2005
期刊：
全国シンポジウム『中世窯業の諸相』資料集
影响因子：
--
作者：
山口 敏;石田 肇;池田榮史
通讯作者：
池田榮史