中文摘要：

核心 MD05-2901 的高分辨率的氧同位素地层学，位于离开东方越南西方的华南海(SCS ) ，被建立并且显示核心跨越一时间过去的 450 ka 的时期。把沉积的遗传因子的内容基于松密度，部分孔和石版印刷，源自陆地的集体累积率( TMAR )被获得，它在间冰期的阶段期间平均是 4.9 6.0 g 厘米⁻² ka ⁻¹，比那高在冰川的阶段期间，即与在冰川的阶段显示出更高的 TMAR 的北、南部的 SCS 不同的 1.9 5.0 g 厘米⁻² ka ⁻¹,。由所有样品的谷物尺寸分发的原则部件分析，二个主要控制因素(F1 和 F2 ) 被获得，它为颗粒度的大约 80% 变化负责。谷物尺寸人口 1.26 2.66 μm% 和对 F1 敏感的 10.8 14.3 μm% 的内容显示出高周波的变化，并且在 15 ° N 与夏天曝晒相关很好。他们在 23 ka 和 13 ka 附近与频率展出不同 cyclicity，与在 4.24 7.42 μm% 和 30.1 43.7 μm% 主要由 F2 控制了的代理获得的 100 ka 附近的一座强壮的频率山峰相对照。SCS 的这部分的沉积特性被输入流动的变化从二个主要来源区域控制，也就是西南和北方 SCS，它被东方亚洲夏天季风和冬季季风分别地强迫的表面电流的不同发行量搬运。我们相信东方亚洲夏天季风与高频率波动 并且在与领前和半领前联系的低纬度在太阳的曝晒由变化强迫了，当强迫的冰卷可能是在决定力量并且东方亚洲冬季季风，但是与强迫的更少的重要曝晒预定的一个主要因素时。

英文摘要：

High-resolution oxygen isotope stratigraphy of Core MD05-2901, which is located off eastern Vietnam in the western South China Sea （SCS）, was established and indicated that the core spans a time period of the past 450 ka. Based on the bulk density, fractional porosity and lithogenic content of the sediments, terrigenous mass accumulation rate （TMAR） was obtained, which is 4.9-6.0 g cm^-2 ka^-1 on average during interglacial stages, higher than that during glacial stages, i.e. 1.9-5.0 g cm^-2 ka^-1, which is different from northern and southern SCS which show higher TMAR in glacial stages. By principle component analysis of grain size distribution of all the samples, two main control factors （F1 and F2） were obtained, which are responsible for about 80% variance of granularity. The contents of grain size population 1.26-2.66 μm% and 10.8-14.3 μm% which are sensible to F1 show high-frequency fluctuation, and correlate well with the summer insolation at 15^o N. They exhibit a distinct cyclicity with frequencies near 23 ka and 13 ka, in contrast to a strong frequency peak near 100 ka obtained in proxies 4.24-7.42 μm% and 30.1-43.7 μm% controlled mainly by F2. The sedimentary character of this part of the SCS was controlled by variations of input flux from two main source areas, namely the southwest and north SCS, which were transported by different circulations of surface current forced by East Asian summer monsoon and winter monsoon respectively. We believe that the East Asian summer monsoon has fluctuated with high frequency and been forced by changes in solar insolation in low latitude associated with precession and half precession, while ice-volume forcing is probably a primary factor in determining the strength and timing of the East Asian winter monsoon but with less important insolation forcing.