| 摘要: |
| 通过对九龙江口北岸的充龙贝壳堤进行岩性、有孔虫、孢粉和年代学等方面的综合研究,认为充龙贝壳堤是由三道次一级贝壳堤在同一位置上叠置而成的,形成年代分别为4300—3800a B.P.;2350—1870a B.P.,始于1300a B.P.。并反映出九龙江口北岸地区过去4300a的海平面呈三进三退的振荡波动形式而逐渐回降到现今位置。 |
| 关键词: 贝壳堤 海平面 全新世 |
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| THE OVERLAPPING CHANIER IN THE NORTH BANK OF JIULO-NGJIANG ESTUARY AND THE SEA LEVEL CHANGES IN THE LATE HOLOCENE |
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| Abstract: |
| The chanier in the north bank of Jiulongjiang Estuary is located in Chonglong, Longhai county, Fujian province, PRC. Through composite analysis of its lithology, foraminiferal fossils and sporo-pollen assemblages, the author found that the chanier was composed of three smaller chaniers deposited separately in the same location in 4300-3800 a. B. P., 2350-1870 a. B. P., and 1300 a. B. P.. The special sedimentary structures of the canier revealed that the sea levels along the coast or Jiulongjiang Estuary changed three times and fluctuated gradually to its present level during the past 4300 a. The author also expounded that only the bottom of chanier can exactly be related to the High Water. According to this new concept, the author calculated that the heights of the relative sea levels in 4300 a. B. P., 2350 a. B. P. and 1300 a. B. P. were -2.16m, -0.96m and +0.14m respectively. That the absolute sea levels was at variance with the relative sea levels was caused by the tectonics subsidence of the north bank of Jiulongjiang Estuary. |
| Key words: The overlapping chanier, Sea level, Holocene |
