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为了进行粘土矿物的研究,作者分析了取自南海和暹罗湾的25个沉积物样品。结果表明暹罗湾的沉积物中含有35％的蒙脱石、13％的绿泥石、30％的伊利石和22％的高岭石,而南海的沉积物中则含有16％的蒙脱石、21％的绿泥石、41％的伊利石和22％的高岭石。把暹罗湾与南海沉积物中的蒙脱石相比,暹罗湾沉积物中蒙脱石的丰度较高,这暗示着蒙脱石主要来源于海湾周围陆地区的土壤建造,特别是来源于马来半岛北部的土壤建造。相反,南海沉积物中伊利石的含量要比暹罗湾高。这种矿物似是由加里曼丹岛和湄公三角洲提供的。虽然暹罗湾与南海的沉积物中绿泥石和伊利石的分布很类似,但是这并不表明加里曼丹岛是绿泥石的主要来源区。暹罗湾与南海沉积物中含高岭石的数量相同,是由于高岭石作为“低纬度粘土矿物”在边缘陆地区广泛分布的缘故。看来研究海区沉积物中粘土矿物的分布与相邻地区的地质和土壤建造有密切的关系。
For clay mineral studies, the authors analyzed 25 sediment samples from the South China Sea and Gulf of Siam. The results show that sediments in the Gulf of Siam contain 35% montmorillonite, 13% chlorite, 30% illite and 22% kaolinite, while the South China Sea sediments contain 16% montmorillonite 21% chlorite, 41% illite and 22% kaolinite. The higher abundance of montmorillonite in the Siam Bay sediments compared with montmorillonite in the Siam Bay sediments implies that the montmorillonite is mainly derived from soil construction in the perimeter of the Gulf Coast and especially Built from soil in northern Malay Peninsula. In contrast, the illite content in the sediments of the South China Sea is higher than that of the Gulf of Siam. The mineral seems to be supplied by Kalimantan and the Mekong Delta. Although the distribution of chlorites and illites in the sediments of the Gulf of Siam and the South China Sea is similar, this does not indicate that Kalimantan is the main source of chlorite. The same amount of kaolinite in the Siam Bay and South China Sea sediments is due to the widespread distribution of kaolinite as “low latitude clay minerals” in the marginal land region. It seems that the distribution of clay minerals in the sediments of the sea area is closely related to the geology and soil construction in the adjacent areas.