中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Applying end-member modeling to extricate the sedimentary environment of yardang strata in the dunhuang yardang national geopark, northwestern china

文献类型:期刊论文

作者Liang, Xiaolei1,2,3; Niu, Qinghe1,3; Qu, Jianjun1,3; Liu, Bing1; Liu, Benli1,3; Zhai, Xiaohui1,2; Niu, Baicheng1,2,3
刊名Catena
出版日期2019-09-01
卷号180页码:238-251
ISSN号0341-8162
关键词Yardang Grain-size Sedimentary environment End-member modeling
DOI10.1016/j.catena.2019.04.029
通讯作者Niu, qinghe(niuqh@lzb.ac.cn)
英文摘要Formative mechanisms and sedimentary environments of yardang landform distribution in arid and semiarid regions of northwestern china remain poorly understood due to their unique formation and enigmatic causation. considerable controversy remains as to whether yardang deposits evolve from aeolian or aqueous forces, and no reliable, quantitative method has yet been made available to resolve this issue. this study conducted a comparative analysis between yardang strata and modern surface sediments to characterize the sedimentary environment using end-member modeling analysis (emma). results show that yardang and surface sediment end members corresponded well, and that the yardang depositional environment can be classified into three typical types: aeolian (200-550 mu m (mode value range)), alluvial (150-300 mu m and 8-20 mu m), and lacustrine (subclassified into shoreline: 80-110 mu m; lake center: 3-15 mu m; and transitional (the transition between the littoral and limnetic zones): 15-60 mu m). based on this method, we determined that lacustrine, aeolian, and alluvial concentrations were 63.92%, 20.80%, and 15.28% (ya profile, respectively) and 53.68%, 28.30%, and 18.02% (yb profile, respectively). additionally, a significant difference was found between the sedimentary processes of the two profiles, where ya had more lacustrine sediments and yb had more aeolian sediments, likely resulting from paleotopography. generally, yardang derives from alternating lacustrine, aeolian, and alluvial sedimentary deposits. although lacustrine sediments predominated, aeolian sediments also accounted for a considerable overall proportion. this study provides new insight into the formation and development of yardang landforms as well as evidence for the reconstruction of paleo-geomorphologic patterns.
收录类别SCI
WOS关键词GRAIN-SIZE DISTRIBUTION ; LAKE-SEDIMENTS ; CLIMATE-CHANGE ; LEVEL STATUS ; DESERT ; LOESS ; EVOLUTION ; COMPONENT ; FEATURES ; REACHES
WOS研究方向Geology ; Agriculture ; Water Resources
WOS类目Geosciences, Multidisciplinary ; Soil Science ; Water Resources
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000472244900022
URI标识http://www.irgrid.ac.cn/handle/1471x/2555403
专题寒区旱区环境与工程研究所
通讯作者Niu, Qinghe
作者单位1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Dunhuang Gobi & Desert Ecol & Environm Res Stn, Dunhuang 736200, Peoples R China
推荐引用方式
GB/T 7714
Liang, Xiaolei,Niu, Qinghe,Qu, Jianjun,et al. Applying end-member modeling to extricate the sedimentary environment of yardang strata in the dunhuang yardang national geopark, northwestern china[J]. Catena,2019,180:238-251.
APA Liang, Xiaolei.,Niu, Qinghe.,Qu, Jianjun.,Liu, Bing.,Liu, Benli.,...&Niu, Baicheng.(2019).Applying end-member modeling to extricate the sedimentary environment of yardang strata in the dunhuang yardang national geopark, northwestern china.Catena,180,238-251.
MLA Liang, Xiaolei,et al."Applying end-member modeling to extricate the sedimentary environment of yardang strata in the dunhuang yardang national geopark, northwestern china".Catena 180(2019):238-251.

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来源:寒区旱区环境与工程研究所

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