摘要
利用不同的化学分析方法,对5个岩芯沉积物进行了分析,结果表明,岩芯可分为铝硅酸盐沉积和碳酸盐沉积两种类型。前者主要是由Sio_2,Al_2O_3,Fe_2O_3以及其他金属氧化物组成,可能与火山源有关。后者主要是由碳酸盐组成,它与生物源有关。 典型岩芯沉积物多种氧化物含量的垂向变化往往发生在岩芯某一相同位置,这暗示了在地质时期中曾发生过地质环境的变化。
Five core sediments collected from the west Phillippines Basin and Mariana Trough were analysed using various chemical analysis methods. The results indicate the five core sediments can be divided into two types according to their different chemical properties, alumi-nosilicate sediment and carbonate sediment. The former is mainly composed of SiO2, A12O3, Fe2O3 and other metallic oxides. Perhaps this sediment type is relative to its volcanic origin. The latter is mainly composed of carbonates, which is relative to its biogenic origin.In addition, analysis results of vertical variance in typical core sediment indicate that content variance of many oxides often occurred at the same part of the core. This variance property suggests that perhaps the change on geological environment occurred during the past geological period.
出处
《海洋科学》
CAS
CSCD
北大核心
1992年第3期45-48,共4页
Marine Sciences
关键词
铝硅酸盐
碳酸盐
海盆
海槽
Alumnosilicate sediment, Carbonate sediment
