当前位置: X-MOL 学术Catena › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Applicability of rare earth elements in eolian sands from desert as proxies for provenance: A case study in the Badain Jaran Desert, Northwestern China
Catena ( IF 6.2 ) Pub Date : 2021-08-07 , DOI: 10.1016/j.catena.2021.105647
Zhuolun Li 1 , Qiujie Chen 1 , Shipei Dong 1 , Dezhong Zhang 1 , Xinhui Yu 1 , Cheng Zhang 1
Affiliation  

Rare earth elements (REEs) have been widely used to infer the provenance of sediments. However, sedimentary sorting and chemical weathering may produce REE compositions within sediments that vary with grain size, leading to complications and uncertainty when tracing possible source areas. In desert areas, the extent to which REE compositions within eolian sands are affected by sedimentary sorting along with which REE proxies can be used to indicate provenance requires further study. During our work, 73 samples were collected from the Badain Jaran Desert (BJD) and some nearby regions. These were analyzed for trace elements and REEs. Our results showed that the REE composition of these eolian sands varied considerably among the various grain-size fractions. We conclude that the REE composition of these eolian sands in the BJD is a function of sedimentary sorting and provenance rather than of chemical weathering. Among the REE proxies considered, variations in (La/Yb)N and Y/REE values seem mainly to have been affected by sedimentary sorting, whilst δCe, (La/Sm)N, (La/Gd)N, Y/Tb, Y/Er, and Ce/Nd ratios appeared primarily to have been governed by provenance. Therefore, we can infer that care is needed when using (La/Yb)N and Y/REE as proxies for determining eolian sand provenance; however, δCe, (La/Sm)N, (La/Gd)N, Y/Tb, Y/Er, and Ce/Nd ratios offer a more reliable perspective. Moreover, by using (La/Sm)N and (La/Gd)N as provenance proxies, we determined that hinterland lacustrine sediments are an important source of < 125 μm fractions in the eolian sands of the BJD.

更新日期:2021-08-07
down
wechat
bug