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利用X衍射法分析了苏北平原浅钻剖面(YZ1)的粘土矿物类型和含量,并对其环境意义进行了探讨。结果表明,YZ1浅钻沉积物粘土成分主要由4种粘土矿物(伊利石、高岭石、绿泥石、蒙脱石)和少量长石、石英碎屑组成;研究区的古气候环境演变主要经历3个阶段,13 770~11 600 cal a B.P.期间的低温冷干阶段;11 600~9 610cal a B.P.期间的逐步升温阶段;9 610~1 520 cal a B.P.期间的全新世暖湿阶段,在这3个大的阶段背景条件下也存在一些次级波动。
The X-ray diffraction method was used to analyze the types and contents of clay minerals in the shallow drilling section (YZ1) of the Northern Jiangsu Plain and the environmental implications were discussed. The results show that the clay composition of YZ1 shallow-sediment sediments is mainly composed of four kinds of clay minerals (illite, kaolinite, chlorite, montmorillonite) and a small amount of feldspar and quartz debris. The paleoclimate and environmental evolution in the study area mainly After 3 stages, the cold-dry period of 13 770 ~ 11 600 cal a BP, the warm-stage of 11 600 ~ 9 610 cal a BP and the warm-wet stage of Holocene 9 610 ~ 1 520 cal a BP, There are also some secondary fluctuations in these three large stage background conditions.