苏北盆地XH-1钻孔0.78Ma以来的气候环境变化记录

对苏北盆地XH-1钻孔上部86.5m湖沼相沉积物中碳酸盐含量、磁化率、地化元素比值、孢粉等指标进行了初步研究,苏北盆地近78万年来的古气候环境经历了多次干湿变化,共可划分出11个气候阶段:第I、III、V、VII、IX、XI为相对湿润气候阶段;第II、IV、VI、VIII、X为相对干旱阶段。研究结果与深海氧同位素和我国黄土记录对比结果表明,它们之间的气候演化阶段及变化趋势具有较好可比性,但也存在一定的差异,指示出我国东部季风气候区域气候变化具有全球一致性的同时也存在明显的区域性特征。

ENVIRONMENTAL RECORDS IN XH-1 CORE IN NORTHERN JIANGSU BASIN SINCE ABOUT 780Ka B.P.

Through comprehensive analysis of mass susceptibility, carbonate context, elemental ratios, sporo-pollens, ~ 14 C dating results, and paleomagnetism of the XH-1 Core in Northern Jiangsu Basin, it is suggested that paleoclimate changes can recognized as eleven distinct stages in the past 780 ka. The first, third, fifth, seventh, ninth and eleventh stages were warm-wet periods; whereas the second, fourth, sixth, eighth and tenth stages correspond to relatively cool-dry periods. The climate history in the past...