title: Distribution and geological sources of selenium in environmental materials in Taoyuan County, Hunan Province, China.
abstract: The selenium (Se) distribution and geological sources in Taoyuan County, China, were determined by using hydride generation atomic fluorescence spectrometry on rock, soil, and food crop samples collected from various geological regions within the county. The results show Se contents of 0.02-223.85, 0.18-7.05, and 0.006-5.374 mg/kg in the rock, soil, and food crops in Taoyuan County, respectively. The region showing the highest Se content is western Taoyuan County amid the Lower Cambrian and Ediacaran black rock series outcrop, which has banding distributed west to east. A relatively high-Se environment is found in the central and southern areas of Taoyuan County, where Quaternary Limnetic sedimentary facies and Neoproterozoic metamorphic volcanic rocks outcrop, respectively. A relatively low-Se environment includes the central and northern areas of Taoyuan County, where Middle and Upper Cambrian and Ordovician carbonate rocks and Cretaceous sandstones and conglomerates outcrop. These results indicate that Se distribution in Taoyuan County varies markedly and is controlled by the Se content of the bedrock. The Se-enriched Lower Cambrian and Ediacaran black rock series is the primary source of the seleniferous environment observed in Taoyuan County. Potential seleniferous environments are likely to be found near outcrops of the Lower Cambrian and Ediacaran black rock series in southern China.
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Runxiang
authors.initials: R
authors.lastname: Ni
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China. kunliluo@sohu.com.
authors.forename: Kunli
authors.initials: K
authors.lastname: Luo
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Xinglei
authors.initials: X
authors.lastname: Tian
authors.affiliation: Taoyuan Institute of Selenium Enriched Production Research, Hunan, 415700, China.
authors.forename: Songgui
authors.initials: S
authors.lastname: Yan
authors.affiliation: Taoyuan Institute of Selenium Enriched Production Research, Hunan, 415700, China.
authors.forename: Jitai
authors.initials: J
authors.lastname: Zhong
authors.affiliation: Agricultural Bureau of Taoyuan County, Hunan, 415700, China.
authors.forename: Maoqiu
authors.initials: M
authors.lastname: Liu
mesh_terms: D002681:China; D018556:Crops, Agricultural / Q000737:chemistry*; D004784:Environmental Monitoring; D055593:Geological Phenomena; D012643:Selenium / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D012987:Soil; D012643:Selenium
keywords: Selenium distribution; Selenium geological sources; Taoyuan County