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古代深海沉积 ,尤其是巨厚浊积岩系和复理石相均伴生着极丰富的遗迹化石 ,这些遗迹群落则成为恢复沉积环境和重建古地理格局的有效标志 .重点阐述 :(ⅰ )深海环境遗迹化石形成的特殊性及其组合特征 ,进而确认浅水和深水遗迹群落共生于一个沉积序列是判识浊流沉积层序的古遗迹学标志 ;(ⅱ )利用遗迹化石恢复古海水深度、含氧状况和沉积速率等环境指标的思路和方法 ;(ⅲ )深海遗迹相在环境解释中的作用和意义
The ancient deep-sea sediments, especially the huge turbidites and flysch facies, are associated with extremely rich trace fossils, and these remnant communities have become valid indicators for the restoration of sedimentary environment and the reconstruction of palaeogeography. The following are the highlights: (i) Deep-sea environmental relics The particularity of formation of fossils and their assemblage characteristics, so as to confirm that the symbiosis of shallow and deep water relict communities in a sedimentary sequence is the landmark of ancient relics for identifying turbidite sedimentary sequence; (ii) the use of trace fossils to restore ancient seawater depth and oxygen status And sedimentation rate and other environmental indicators ideas and methods; (iii) deep-sea relics in environmental interpretation of the role and significance