粒度分布的端元建模分析及检验:以&#x0201c;吉兰泰&#x02014;河套&#x0201d;盆地西部DK-12钻孔晚第四纪沉积物为例<sup>&#x0002A;</sup>

doi:10.7605/gdlxb.2018.03.036

古地理学报 ›› 2018, Vol. 20 ›› Issue (3): 489-500. doi: 10.7605/gdlxb.2018.03.036

• 第四纪古地理学及沉积学 • 上一篇下一篇

粒度分布的端元建模分析及检验:以“吉兰泰—河套”盆地西部DK-12钻孔晚第四纪沉积物为例^*

牟雪松¹, 马俊¹, 王永达¹, 范育新^{1, 2}

1 兰州大学地质科学与矿产资源学院,甘肃省西部矿产资源重点实验室,甘肃兰州 730000;
2 兰州大学西部环境教育部重点实验室,甘肃兰州 730000

收稿日期:2017-09-26 修回日期:2017-11-29 出版日期:2018-06-01 发布日期:2018-06-07
通讯作者: 范育新,男,1975年生,教授,主要研究方向为干旱区湖泊—沙漠环境演化机制及年代学。E-mail: yxfan@lzu.edu.cn。
作者简介:牟雪松,男,1994年生,硕士研究生,构造地质学专业。E-mail: mouxs12@lzu.edu.cn。。
基金资助:
*国家自然科学基金项目(编号: 41772169,41371033)和中国科学院战略性先导科技专项(编号:XDA2009000001)联合资助

End-member modeling analysis and test of grain-size distribution:A case from the late Quaternary sediments of Borehole DK-12 in the western Jilantai-Hetao Basin

Mou Xue-Song¹, Ma Jun¹, Wang Yong-Da¹, Fan Yu-Xin^{1, 2}

1 Key Laboratory of Mineral Resources in Western China(Gansu Province),School of Earth Sciences,Lanzhou University,Lanzhou 730000,Gansu;
2 Key Laboratory of Western China’s Environmental Systems(Ministry of Education),Lanzhou University,Lanzhou 730000,Gansu;

Received:2017-09-26 Revised:2017-11-29 Online:2018-06-01 Published:2018-06-07
Contact: Fan Yu-Xin,born in 1975,is a professor at School of Earth Sciences,Lanzhou University. Now he is engaged in researches on evolution mechanism of lake-desert environment and chronology in the arid regions. E-mail: yxfan@lzu.edu.cn.
Supported by:
Co-funded by the National Natural Science Foundation of China(Nos.41772169,41371033) and the Strategic Priority Research Program of Chinese Academy of Sciences(No. XDA2009000001)

摘要/Abstract

摘要： 端元建模分析能够从复杂的多峰分布特征的沉积物中提取出具有不同沉积动力过程的端元,但是,由于沉积物的粒度分布还受到沉积环境等多种因素的影响,该方法的有效性及获得的端元组分的地质意义有待其他环境代用指标的进一步检验。以位于“吉兰泰—河套”盆地西部磴口次级隆起区的DK-12钻孔晚第四纪沉积物为例,采用BEMMA算法对该钻孔沉积物的粒度资料进行了端元建模分析,并以黏土矿物组合和前人的孢粉组合数据作为检验指标,结合该地区的区域地质背景,对获得的4个端元进行了综合检验分析,认为获得的沉积物粒度端元具有明确的地质意义,其中EM 1为远源粉尘、EM 2为近源的风成沙、EM 3和EM 4为河流冲积沙。

关键词: 粒度分布, 端元建模分析, 黏土矿物组合, 孢粉组合

Abstract: End-member modeling analysis is beneficial to extract the end-members with different transporting dynamics from sediments characterized by complex multimodal distribution. However,because the grain-size distribution of sediments is affected by many factors besides depositional environment,the effectiveness of this method and the geological significance of each end-member need to be tested. In this paper,the BEMMA algorithm is used to analyze grain size data of samples from the Borehole DK-12 obtained in the Dengkou sub-uplift at the western Jilantai-Hetao Basin. Four end-members are recognized including remote dust(EM 1),aeolian sand(EM 2),and fluvial sand(EM 3 and EM 4).

Key words: grain-size distribution, end-member modeling analysis, clay mineral assemblage, pollen assemblage

中图分类号:

P534.63

牟雪松, 马俊, 王永达, 范育新. 粒度分布的端元建模分析及检验:以“吉兰泰—河套”盆地西部DK-12钻孔晚第四纪沉积物为例^*[J]. 古地理学报, 2018, 20(3): 489-500.

Mou Xue-Song, Ma Jun, Wang Yong-Da, Fan Yu-Xin. End-member modeling analysis and test of grain-size distribution:A case from the late Quaternary sediments of Borehole DK-12 in the western Jilantai-Hetao Basin[J]. JOPC, 2018, 20(3): 489-500.

http://www.gdlxb.cn/CN/Y2018/V20/I3/489

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