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依据现代海洋中有孔虫动物群的分布与环境之间的关系 ,即在一定限度内有孔虫动物群的丰度和分异度随水深增加而增加 ,有孔虫动物群的组合面貌随之发生规律性变化 ,对南海北部琼东南盆地崖 1 9-1 -1井晚第三纪有孔虫动物群进行了定量研究。通过对有孔虫动物群的丰度、分异度、辛普松指数、信息函数熵、多变度、优势度、浮游有孔虫百分含量及底栖有孔虫内生种与外生种的比值逐样计算和统计 ,讨论了陆架海区有孔虫动物群的演替与古水深变化的关系。研究认为崖 1 9-1 -1井晚第三纪以来古水深变化的总趋势为逐渐增大 ,至上新世早中期出现外浅海至半深海环境 ,为古水深最大时期 ,随后水深则逐渐减小。
According to the relationship between the distribution of foraminiferal fauna in the modern ocean and the environment, that is, within a certain limit, the abundance and differentiation of foraminifer fauna have increased with the increase of water depth, and the assemblage of foraminifer fauna The occurrence of regular changes in the Qiongdongnan Basin, South Qiongdongnan Basin 1 9-1 -1 Late Quaternary foraminifer fauna were quantitatively studied. By analyzing the abundance, diversity, Simpson index, entropy of information function, variability, dominance, the percentage of planktonic foraminifera and endophytic foraminiferal endophytes and exogenous The ratios of species were calculated and statistically calculated, and the relationship between the succession of foraminifer fauna and paleo-water depth in the continental shelf was discussed. The study shows that the general trend of Paleoecimal water depth changes since the Late Paleogene in Yaxian 9-1-1 well increased from shallow sea to semi-deep sea environment in the early and middle Pliocene, small.