西昆仑山甜水海钻孔氧化铁指标的R/S分析及其意义

R/S Analysis of Indexes of Ferric Oxide From Tianshuihai Lake Core and Their Implication

运用R／S分析法，对经过等时处理的甜水海钻孔氧化铁3项指标FeO、Fe2O3及其比值FeO／Fe2O3进行了分析计算，其指标都存在明显的Hurst现象，Hurst指数H分别为：Fe2O3为0．76，FeO为0．85，FeO／Fe2O3为0．65，它们都大于0．5．反映了该地区过去20多万年来气候环境变化存在持续性3者Hurst指数存在差异的原因目前还不清楚，可能说明它们反映气候环境演化持续性强度的差异．甜水海地区的这种气候环境演化持续特征在其它地区也有所反映，这可能与新生代以来青藏高原的持续构造抬升活动有关．

Based on a R / S analysis of FeO,Fe2O3 and ratio of FeO/ Fe2O3 from Tianshuihai Lake core, which is scaled with time, it is found that there are obvious Hurst effect with Hurst indexes of 0.85, 0.76 and 0.65 respectively. All the three Hurst indexes are greater than 0.5, showing a persistence in the climate and environment evolution around the Tianshuihai lake area during the past 200 ka or more.At present it is not clear why these Hurst indexes are different from each other. Maybe this shows a difference in the intensity of persistence in climatic and environment variation. The persistence in the climatic and environmental evolution around the Tianshuihai lake area since 200 ha BP or more also existed in some other areas and probably resulted from the uplift of the Tibetan Plateau through the Cenozoic era.