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为了研究获得该钻孔沉积年龄,用磁性地层学方法和AMS~(14)C测年结果,分析该钻孔沉积历史。120个样品古地磁结果表明沉积物磁倾角大部分为正倾角,应都属于布容正极性期,存在的负倾角段可能记录了Gothemburg(~12 kyr)、Hilina-Pali(~17 kyr)、Mono Lake(~3 2kyr)极性漂移和Laschamp(~41 kyr)极性事件。表明该钻孔沉积历史约为40kyr。因此利用磁性地层学很好的解决了三角洲地区沉积物缺少有效测年物质的问题。并与岩性地层对比方法进行比较,表明该地区的一层硬黏土层确实为全新世与晚更新世界线。
In order to study the age of the borehole, the history of borehole deposition was analyzed by magnetic stratigraphy and AMS ~ (14) C dating. Paleomagnetic results of 120 samples indicate that most of the sediments have a positive dip and belong to the positive polarity of the cloth. The negative dip may have recorded Gothemburg (~ 12 kyr), Hilina-Pali (~ 17 kyr) Mono Lake (~ 3 2kyr) Polar Drift and Laschamp (~ 41 kyr) Polar Events. Indicating that the history of drilling deposition is about 40kyr. Therefore, the use of magnetic stratigraphy is a good solution to the lack of effective dating of sediments in the delta region. Compared with lithologic stratigraphic comparison, it shows that a layer of hard clay in this area is indeed the Holocene and Late Pleistocene line.