摘要
以辽东半岛南部卧龙古风化壳剖面为研究对象,分析其磁化率变化特征曲线,并与粒度特征结合分析,初步探讨辽东半岛南部的沉积环境及其古气候变化信息,研究结果表明:卧龙剖面磁化率曲线整体呈现出波动变化的趋势,频率磁化率百分数曲线从剖面顶部至底部呈现出波动减小的趋势,低频磁化率平均值为13.5 ×10−8 m3/kg,百分比频率磁化率平均值为5.4%;粒度分析表明磁性矿物可能主要富集于2~63 um的粉砂组分中;卧龙剖面磁学参数的变化特征在一定程度上可以反映古气候信息,但能否作为恢复古气候的替代指标,还需深入研究。
In this paper, Wolong section as object, analyzing the changes of magnetic susceptibility characteristic curve, and combined with particle size characteristics analysis, the preliminary discussion of the Liaodong peninsula, sedimentary environment and ancient climate change information, the results show that magnetic susceptibility curve Wolong profile overall present a fluctuation change trend, the percentage of frequency magnetic susceptibility curve from the top section to appear at the bottom of the wave decreases, low frequency magnetic susceptibility averaged 13.5 ×10−8 m3/kg−1, the average frequency of magnetic susceptibility percentage is 5.4%;Particle size analysis shows that magnetic minerals may be mainly concentrated in the silty components of 2~63 um. The variation characteristics of magnetic parameters of Wolong section can reflect the palaeoclimate information to some extent. Whether it can be used as a substitute index for the recovery of palaeoclimate needs further study.
出处
《地球科学前沿（汉斯）》
2021年第3期339-348,共10页
Advances in Geosciences
