拟对早白垩世-始新世深时时期陆相地层沉积学和稳定同位素地球化学重建华南古气候并甄别古气候事件。利用前人生物地层工作，在火山锆石U-Pb同位素年龄校准基础上以及华南建相关地层和气候分析样品有较好地质年代约束前提条件下，通过沉积记录中的岩相、古土壤类型、碎屑气候指数、古土壤和自生黏土矿物组合与相对含量、湖相碳酸盐岩碳氧同位素值等指标综合分析古气候波动及变化样式；利用成壤钙质结核碳同位素值按照有关经验公式对古大气CO2浓度进行定量估算；建立华南这一时期古气候变化复合剖面序列及较高分辨率（200-300层位点）的古大气CO2浓度综合变化曲线；进而辨识快速气候变化及气候事件，研究快速气候变化的成因机制，探究与温室气候的反馈关系及其与相关地质事件（如OAEs、LIPs、K/T、PETM）的联系。

Two methods of sedimentology and stable isotope geochemistry will be used to reconstruct the Cretaceous - middle Paleogene paleoclimate from South China. On the basis of former biostratigraphic works, chronostratigraphy will be calibrated by volcanic zircon U-Pb isotope dating for confine of samples before paleoclimate analysis. Lithofacies classification, paleosol type, clastic climatic index, association and relative content of authogenic clay mineral from paleosol and weathered volcanic rocks, carbon and oxygen value excursion of lacustrine carbonate rocks, will be combined to frame the paleoclimate fluctuations and change patterns, which could be documented in special sediments. A compsite section sequence will be established for climate changes. Atmospheric CO2 concentration will be estimated by using Ekart et al. (1999) statistic formula against the carbon isotope values of pedogenic calcretes, subsequently a synthetic curve of the Cretaceous -middle Paleogene atmospheric CO2 concentration changes will be composed in a relatively high resolution (over 200-300 sample horizons). According to the atmospheric CO2 concentration change curve and composite paleoclimatic change section sequence, events of rapid climatic change and carbon isotope excursion will be diagnosed and discussed for its mechanisms, relationships to "greenhouse" climate, linkages to coeval geological events (e.g. OAEs, LIPs, K/T, PETM).