Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027733 |
Iron Mineralogy and Speciation in Clay-Sized Fractions of Chinese Desert Sediments | |
Lu, Wanyi1; Zhao, Wancang1,2; Balsam, William3; Lu, Huayu2; Liu, Pan1; Lu, Zunli4; Ji, Junfeng1 | |
2017-12-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Iron released from Asian desert dust may be an important source of bioavailable iron for the North Pacific Ocean and thereby may stimulate primary productivity. However, the Fe species of the fine dusts from this source region are poorly characterized. Here we investigate iron species and mineralogy in the clay-sized fractions (<2m), the size fraction most prone to long-distance transport as dust. Samples were analyzed by sequential chemical extraction, X-ray diffraction, and diffuse reflectance spectrometry. Our results show that Fe dissolved from easily reducible iron phases (ferrihydrite and lepidocrocite) and reducible iron oxides (dominated by goethite) are 0.81wt % and 2.39wt %, respectively, and Fe dissolved from phyllosilicates extracted by boiling HCl (dominated by chlorite) is 3.15wt %. Dusts originating from deserts in northwestern China, particularly the Taklimakan desert, are relatively enriched in easily reducible Fe phases, probably due to abundant Fe contained in fresh weathering products resulting from the rapid erosion associated with active uplift of mountains to the west. Data about Fe speciation and mineralogy in Asian dust sources will be useful for improving the quantification of soluble Fe supplied to the oceans, especially in dust models. |
英文关键词 | Chinese deserts iron species clay-sized fractions chlorite iron oxides soluble Fe |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419950200006 |
WOS关键词 | SEQUENTIAL EXTRACTION PROCEDURE ; ATMOSPHERIC IRON ; VISIBLE SPECTROSCOPY ; DISSOLUTION KINETICS ; BIOGEOCHEMICAL CYCLE ; ISOTOPIC COMPOSITION ; DETERMINING HEMATITE ; AEROSOL-PARTICLES ; BIOAVAILABLE IRON ; ACID MOBILIZATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32854 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ, Sch Earth Sci & Engn, Key Lab Surficial Geochem, Minist Educ, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing, Jiangsu, Peoples R China; 3.Dartmouth Coll, Dept Earth Sci, Hanover, NH 03755 USA; 4.Syracuse Univ, Dept Earth Sci, Syracuse, NY USA |
推荐引用方式 GB/T 7714 | Lu, Wanyi,Zhao, Wancang,Balsam, William,et al. Iron Mineralogy and Speciation in Clay-Sized Fractions of Chinese Desert Sediments[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(24). |
APA | Lu, Wanyi.,Zhao, Wancang.,Balsam, William.,Lu, Huayu.,Liu, Pan.,...&Ji, Junfeng.(2017).Iron Mineralogy and Speciation in Clay-Sized Fractions of Chinese Desert Sediments.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(24). |
MLA | Lu, Wanyi,et al."Iron Mineralogy and Speciation in Clay-Sized Fractions of Chinese Desert Sediments".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.24(2017). |
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