【摘要】 通过研究南沙群岛西南海区44个站表层碳酸盐沉积特征,综合分析了沉积物类型、碳酸盐的生物组成、矿物成分、地球化学等,根据碳酸盐沉积的岩性参数之间的关系及相应的沉积环境,应用主成分分析统计对比,提出该海区碳酸盐沉积的六个沉积相及其特征:大陆坡半深海-深海相,南部中、外大陆架浅海相,西部中、外大陆架浅海相,南部内大陆架浅海相,礁体相,礁体过渡相。更多还原

【Abstract】 The characteristics of 44 sea-bed carbonate sediment samples from the area are studied by analysing the sediment’s classification, carbonate biological, mineral and geochemical composition. According to principal component analyses based on the relations between the lithologic parameters of carbonate sediment and relevant sedimentary environments,six sedimentary facies and their respective characters have been identified: Bathyal-adyssal facies of continental slop, Shallow-water facies of the central and outer south continental shelf, Shallow-water facies of the central and outer west continental shelf, Shallowwater facies of the inner south continental shelf, Coral reef facies, Coral reef transition facies.更多还原