韩国济洲岛下西归浦组的时代及其古环境Geological Age and Palaeoenvironment of the Lower Seogwipo Formation, Cheju Island, Korea
李保华,朴柄权,金东升,吴相俊
摘要(Abstract)：
韩国济洲岛下西归浦组的时代归属一直存在着争论。该段地层中浮游有孔虫 Globigerina calida calida、Beella digitata、 Globigerina bermudezi和 Globoquadrina conglomerata的发现表明了它应为中更新世 (晚 N 2 2带、即 Globigerina calida calida亚带 ,不晚于 40万年前 )的沉积。底栖、浮游有孔虫的定量统计分析揭示了下西归浦组沉积环境的变化 :下部的沉积环境为岸外中陆架暖水 ,而向上则演变成近岸内陆架温凉水。有孔虫组合的更替反映了下西归浦组沉积是一个由次一级的 3个亚海退和 2个亚海进组成的海退序列。
关键词(KeyWords)： 中更新世;古环境;海退;西归浦组;济洲岛;韩国
基金项目(Foundation): 韩国海洋研究所与中国科学院南京地质古生物研究所博士后 经费资助
作者(Author): 李保华,朴柄权,金东升,吴相俊
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