摘要
根据安徽宣城向阳剖面64个样品系统的氧化物地球化学测试结果，分析讨论了皖南更新世风尘堆积序列氧化物地球化学特征及其所记录的气候变迁规律。结果表明：该区气候总体上以湿热为主，淋溶及氧化作用较强；近0．8Ma以来经历了8次大的干冷-暖湿气候旋回，显示本区中、晚更新世气候变迁具有全球一致性特点；中更新世以来本区气候演变的总趋势是由湿热向偏于偏凉发展。
According to the oxide-geochemistry measurement of 64 samples taken from Xiangyang section in Xuancheng,Anhui Province,the article analyses and discusses the oxide-geochemistry features and paleoclimatic record of the aeolian-dust depositional sequence in southern Anhui. The result shows the laws of paleoclimate changes as follows: Ⅰ. The paleoclimate was characterized by wet and hot, and the eluviation and oxidation were strong since middle Pleistocene; Ⅱ. Southern Anhui underwent 8 paleoclimatic cycles of dry-cool and wet-warm since 800 kaB. P.,indicating the climate changes of middle and late Pleistocene in this region had a global consistence characteristic; Ⅲ. The general trend of climate changes in southern Anhui was from wet-warm to dry-cool since middle Pleistocene.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1999年第4期75-82,共8页
Marine Geology & Quaternary Geology
基金
国家自然科学基金!49571071
关键词
风尘堆积
氧化物地球化学
古气候变迁
古气候
aeolian-dust deposition
oxide-geochemistry
paleoclimate changes
southern Anhui
