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本文根据珠江三角洲第四纪沉积物TiO_2和Al_2O_3的化学分析资料,探讨了该地区TiO_2/Al_2O_3值及其地质意义。结果表明,珠江三角洲表层样品TiO_3从河道、河口向外海逐渐减小,其TiO_2平均值为:三角洲平原1.517,三角洲前缘1.201,潮汐河口湾1.001,浅海内陆架0.834.珠江三角洲钻孔岩芯样TiO_2值与沉积时间(7500a以来)呈正相关关系,并且TiO_2值逐渐增加;这种增加极可能是反映了珠江三角洲的延伸进积作用和河流作用的加剧。
Based on the chemical analysis data of the TiO 2 and Al 2 O 3 in the Quaternary sediments of the Pearl River Delta, this paper discusses the value of TiO 2 / Al 2 O 3 in this area and its geological significance. The results show that the surface layer of the Pearl River Delta samples from the rivers and estuaries to the outside of the sea gradually reduce the TiO_3, the average TiO_2: delta plain 1.517, 1.201 delta front, tidal estuary 1.001, shallow marine shelf 0.834. Pearl River Delta drilling core The value of TiO_2 has a positive correlation with the deposition time (since 7500a), and the value of TiO_2 gradually increases. This increase probably reflects the extension and sedimentation of the Pearl River Delta and the intensification of the river.