摘要
目的通过分析龙洲丹霞地貌沉积物岩性及粒度特征,为西北干旱地区及其它区域丹霞沉积物的进一步研究提供科学依据。方法分析龙洲丹霞地貌沉积物岩性特征,并用激光粒度仪进行粒度测定。结果龙洲丹霞地貌沉积物是由多种组分叠加组成,主要以中砂为主,不同层位夹杂其它组分。沉积物粒径值较大,平均粒径(Mz)为375μm,而且粒径值随深度变化复杂,整体韵律变化明显。结论区域沉积物物质来源与搬运方式相对单一,以河流砂沉积为主,同时还伴随风力作用的沉积。
Purposes-To provide scientific basis for further study of Danxia sediments in Northwest arid area and other regions by analyzing the lithology and granularity characteristics of Danxia sediments in Longzhou,Jingbian County,Shaanxi,China. Methods-The lithologic characteristics of Danxia sediments in Longzhou are analyzed,and the particle sizes are measured with laser granularity analyzer. Result-The sediments are composed of several components,mainly medium sand and other components in different layers.The average particle size ( Mz ) of sediments is large,375 μm in diameter.The variation of particle sizes with depth is complex and the overall prosody is obvious. Conclusion-The sources and transport of sediments are relatively single.The sediments center on the deposition of river sand in company of the deposition under the action of wind force.
作者
李东兴
马珂
周雄辉
康秀丽
刘滨
林青
李东
张俊辉
LI Dong-xing;MA Ke;ZHOU Xiong-hui;KANG Xiu-li;LIU Bin;LIN Qing;LI Dong;ZHANG Jun-hui(College of Geography and Environment,Baoji University of Arts and Sciences,Baoji 721013,Shaanxi,China)
出处
《宝鸡文理学院学报（自然科学版）》
CAS
2019年第1期80-88,共9页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
关键词
龙洲
丹霞
沉积物
粒度
Longzhou
Danxia
sediments
granularity
