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Magnetic Fabric of Holocene Palaeo-Floods Events in Jianghan Plain oft-com:office:office" />
详细信息   
摘要

Based on the study of sedimentary environment and chronology for Holocene sediments from Jiangling profile, Jianghan Plain, this paper studies these events on palaeo-flood which took place in Jianghan Plain since Holocene, using some marks of magnetic fabric parameters of flood sediment. The main results are as follows: 1) there are 55 large events of flood sediment since Holocene in Jianghan Plain (excluding record data in history); and 2) according to evolution, these events are divided into the stage of low frequency (9 875oft-com:office:smarttags" />3 000 a B.P.);which is more stable and has an approximate period of mainly one thousand year and 500625 a, and the stage of high frequency (3 000 a B.P.now); which is more frequent than the former, showing an increasing tendency and has a period of frequent occurrence of mainly 300200 a.oft-com:office:office" />

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