华南沿海黄色粉土沉积的激光粒度分析及其成因讨论

在华南沿海地区的低矮丘陵及台地上, 广泛发育一套黄色粉土堆积。对该区7个典型剖面进行系统的激光粒度分析, 并与典型黄土以及研究区常见的海、河相沉积进行对比。结果表明, 华南沿海各黄色粉土剖面均以10～50 μm的粗粉砂为众数粒组, <5 μm的粘粒为次众粒组, 分别对应风成黄土的“基本粒组”和“挟持粒组”, 岩性均属于粘土质粉砂。样品的粒度参数、粒度散点图、频率分布曲线、粒度指数特征均显示为典型的风成成因。粒度判别分析结果为负值, 同样证实了黄色粉土的风成特性。华南沿海黄色粉土的各项粒度特征指标及其所反映的沉积类型、沉积环境均与我国典型黄土具有较好的可比性, 而与研究区的海、河相沉积截然不同。

Abstract

A layer of yellow silt is widely distributed on the low hills and platforms in the coastal area of south China. Seven typical sections in the study area were analyzed using laser grain size analysis to determine the sedimentary characteristics and genesis of the yellow slit. The typical loess, marine and fluvial deposits were also adopted for contrastive study. The results showed that the yellow silt sections were all featured by the modal size group of coarse silt (10~50 μm) and the secondary grain size of clay (<5 μm), which were corresponding to the “basic grain size group” and “second grain size group” of the typical loess, and the lithology were clayed silt. Aeolian characteristics of the yellow silt were further indicated by grain size parameters, scatter diagrams, frequency distributional curves and grain size index. The result of grain size discriminant analysis was negative, also supporting an aeolian origin of the yellow silt. All of the grain size characteristics of the yellow silt and the sedimentary type and environment they reflected were comparable to that of the typical loess, but quite different from associated fluvial and marine deposits.

参考文献

[1] XI Cheng-fan(席承藩). Quaternary Sciences(第四纪研究), 1991, (1): 1.

[2] HUANG Zhen-guo, ZHANG Wei-qiang, CHEN Jun-hong(黄镇国, 张伟强, 陈俊鸿). Red Earth in South China(中国南方红色风化壳). Beijing: China Ocean Press(北京: 海洋出版社), 1996.

[3] GU Yan-sheng, XIAO Chun-e, ZHANG Ze-jun, et al(顾延生, 肖春娥, 章泽军, 等). Journal of East China Normal University·Natural Science(华东师范大学学报·自然科学版), 2002, 1(1): 69.

[4] ZHU Xian-mo(朱显谟). Quaternary Sciences(第四纪研究), 1993, (1): 75.

[5] ZHU Zhao-yu, XIE Jiu-bing, WANG Yan-hua, et al(朱照宇, 谢久兵, 王彦华, 等). Quaternary Sciences(第四纪研究), 2004, 24(4): 402.

[6] Wang Jing, Chen Guoneng, Peng Zhuolun, et al. Aeolian Research, 2015, 19(Part A): 113.

[7] LIU Dong-sheng(刘东生). Loess and Environment(黄土与环境). Beijing: Science Press(北京: 科学出版社), 1985.

[8] LI Xu-sheng, YANG Da-yuan, LU Hua-yu(李徐生, 杨达源, 鹿化煜). Marine Geology &Quaternary Geology(海洋地质与第四纪地质), 2001, 21(1): 25.

[9] SUN Dong-huai, LU Hua-yu, David R, et al(孙东怀, 鹿化煜, David R, 等). Acta Sedimentologica Sinica(沉积学报), 2000, 18(3): 327.

[10] LU Hua-yu, AN Zhi-sheng(鹿化煜, 安芷生). Acta Sedimentologica Sinica(沉积学报), 1999, 17(2): 226.

[11] LI Jing-wei, QIAO Yan-song, WANG Yan, et al(李敬卫, 乔彦松, 王燕, 等). Journal of Geomechanics(地质力学学报), 2009, 15(1): 95.

[12] Sahu B K. Journal of Sedimentry Petrology, 1964, 34: 337.

王晶, 高全洲, 陈国能. 华南沿海黄色粉土沉积的激光粒度分析及其成因讨论[J]. 光谱学与光谱分析, 2018, 38(2): 358. WANG Jing, GAO Quan-zhou, CHEN Guo-neng. Laser Particle Size Analysis and Genesis of the Yellow Silt in the Coastal Area of South China[J]. Spectroscopy and Spectral Analysis, 2018, 38(2): 358.

华南沿海黄色粉土沉积的激光粒度分析及其成因讨论

关于本站 Cookie 的使用提示

全站搜索

华南沿海黄色粉土沉积的激光粒度分析及其成因讨论

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索