Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2008JF001009 |
Compositions of modern dust and surface sediments in the Desert Southwest, United States | |
Reheis, Marith C.; Budahn, James R.; Lamothe, Paul J.; Reynolds, Richard L. | |
通讯作者 | Reheis, Marith C. |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
![]() |
ISSN | 2169-9003 |
EISSN | 2169-9011 |
出版年 | 2009 |
卷号 | 114 |
英文摘要 | Modern dusts across southwestern United States deserts are compositionally similar to dust-rich Av soil horizons (depths of 0-0.5 cm and 1-4 cm at 35 sites) for common crustal elements but distinctly different for some trace elements. Chemical compositions and magnetic properties of the soil samples are similar among sites relative to dust sources, geographic areas, and lithologic substrates. Exceptions are Li, U, and W, enriched in Owens Valley, California, and Mg and Sr, enriched in soils formed on calcareous fan gravel in southeast Nevada. The Av horizons are dominated by dust and reflect limited mixing with substrate sediments. Modern dust samples are also similar across the region, except that Owens Valley dusts are higher in Mg, Ba, and Li and dusts both there and at sites to the north on volcanic substrates are higher in Sb and W. Thus, dust and Av horizons consist of contributions from many different sources that are well mixed before deposition. Modern dusts contain significantly greater amounts of As, Cd, Cr, Cu, Ni, Pb, and Sb than do Av horizons, which record dust additions over hundreds to thousands of years. These results suggest that modern dust compositions are influenced by anthropogenic sources and emissions from Owens (dry) Lake after its artificial desiccation in 1926. Both modern dusts and Av horizons are enriched in As, Ba, Cu, Li, Sb, Th, U, and W relative to average crustal composition, which we interpret to indicate that the geologic sources of dust in the southwestern United States are geochemically distinctive. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000263952400002 |
WOS关键词 | CENTRAL MOJAVE DESERT ; OWENS LAKE ; TRACE-METALS ; SOUTHERN NEVADA ; EOLIAN DUST ; GEOCHEMICAL VARIATIONS ; NORTH-AMERICA ; CALIFORNIA ; SOILS ; USA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
来源机构 | United States Geological Survey |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/161582 |
作者单位 | US Geol Survey, Lakewood, CO 80225 USA |
推荐引用方式 GB/T 7714 | Reheis, Marith C.,Budahn, James R.,Lamothe, Paul J.,et al. Compositions of modern dust and surface sediments in the Desert Southwest, United States[J]. United States Geological Survey,2009,114. |
APA | Reheis, Marith C.,Budahn, James R.,Lamothe, Paul J.,&Reynolds, Richard L..(2009).Compositions of modern dust and surface sediments in the Desert Southwest, United States.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,114. |
MLA | Reheis, Marith C.,et al."Compositions of modern dust and surface sediments in the Desert Southwest, United States".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 114(2009). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。