从SX97孔矿物特征看气候环境变化的河流响应

以往对气候环境变化河流响应体系多从河流地貌和河流沉积过程（如侵蚀、加只和稳定）的角度进行研究。笔者通过对朱江口东北岩ＳＸ９７孔的粘土矿物和石英的分析，发现它们的变化与该地区气候环境的演化能很好地对应。这些矿物绝大部分来自于汇流区域东江流域。这表明河口地区沉积物中的某些矿物有时也是气候环境变化河流呼应体系的标志。

RIVER RESPONSE TO CLIMATIC AND ENVIRONMENTAL CHANGES AS VIEWED FROM MINERAL CHARACTERISTICS OF CORE SX97

At first, the authors introduce some previous studies on the river response system to climatic and environmental changes. Most of these studies focused on river morphology (such as the forms of the valley and strata) and river deposition processes (such as erosion, deposition and stability). Based on the analyses of clay minerals and quartz in core SX97 in the northeast of the Pearl River mouth, it is found that variations in the contents of these minerals coincide very well with the revolution of local climate and environment since Middle\|to\|Late Pleistocene. Most of the minerals in core SX97 came from the Dongjiang River drainage. This indicates that some minerals in the sediments deposited at the river mouth, being part of the river response system to climatic and environmental changes, can be used as proxies of climatic and environmental changes.