柴达木盆地达参1井自然伽玛曲线的R/S分析

在柴达木盆地达参１井，应用自然伽玛曲线进行了２５万年以来基于年代的Ｒ／Ｓ分析，该时段分维数平均值为１．２２９，与深海氧同位素曲线分维值（１．２２）非常接近，证明了分数维提供了不同气候记录和不同代用指标之间对比的基础。即达参１井的自然伽玛曲线所反应的古环境变化类似于深海氧同位素曲线，其波动是受全球变化控制的。基于深度的自然伽玛曲线Ｒ／Ｓ分析分析也表现出相似的规律性，支持了气候学的研究。通过Ｒ／Ｓ分析

Rescaled Range Analysis of Dacan 1 Core Natural Gamma LoogingCurve in Qaidam Basin

This paper introduces R/S analysis to natural gamma logging curve of Dacan 1 core in Qaidam Basin. The analysis based on Age shows that mean value of the fractal dimension is 1.229 during the last 250 ka,which is close to the fractal dimension of marine isotope profile(1.22),it provides another evidence to fractal dimension affords the comparison basis of different climate record and different proxy record.The analysis based on depth shows similar regularity,which supports the analysis of Age.This method can identify some turning points,which corresponding to GR Value change.It shows the effect of tectonic event and climate change event,and the transform of sedimentary facies and sedimentary environment. It indicates that natural gamma logging curve can be regarded as one of the favorable proxies of environmental and climatic change.It also suggests that fractal dimension obtained from R/S analysis are closely related to sampling interval. With the support of sufficient sequence length and sufficient resolution,it is more reasonable to discuss fractal dimension based on manifold sampling interval.