高分辨率在来自北华南海的核心 MD05-2903 的元素的记录从 XRF 扫描和谷物尺寸和矿物质部件分析被获得。自从 MIS 3, K/Ti 曲线在千年的规模上揭示气候变化,代表这那么远离华南海的深海的沉积记录的最好之一。什么时候把我们的 K/Ti 记录与另外的气候作比较,从高纬度冰核心并且从东亚石笋记录,在 K/Ti 记录的变化在北半球显示出快速的气候变化的一些典型塑造锯的特征。谷物尺寸分析在 K/Ti 并且在好结束成员谷物尺寸揭示在变化之间的一种靠近的关系。XRD 分析证实高 K/Ti 层被 K 富有的捱过的矿物质统治,特别 illite,当低 K/Ti 层包含低 illite 时但是高许多 Ti 富有的重矿物质。因此, K/Ti 记录在在 stadials 和间冰段期间在北华南海区域捱过矿物质和重矿物质的罚款的输入和免职反映变化。这些元素的变化被变化大部分在东亚季风导致的降雨,侵蚀,和河的交通控制。
High resolution elemental MD05-2903 from the northern South records in core China Sea were obtained from XRF scanning and grain size and mineral component analyses. The K/Ti curve reveals climate changes since MIS 3 on a millennial scale, representing one of the best such records so far from deep-sea sediments of the South China Sea. When compared our K/Ti record with other climate records from high latitude ice cores and from East Asia stalagmites, variations in the K/Ti record show some typical saw-shaped features of rapid climate changes in the Northern Hemisphere. Grain size analysis reveals a close relationship between variations in K/Ti and in the fine end-member grain size. XRD analysis confirms that high K/Ti layers were dominated by K-rich weathering minerals, especially illite, while low K/Ti layers contain low illite but high abundance of Ti-rich heavy minerals. Therefore, the K/Ti record reflects changes in the input and deposition of fine weathering minerals and heavy minerals in the northern South China Sea region during stadials and interstadials. These elemental changes were largely con- trolled by variations in rainfall, erosion, and fluvial trans- portation induced by East Asia Monsoon.