@article{Tian2016,
author = "Huan Tian and Zhenzhen Ma and Xiaolei Chen and Hongyu Zhang and Zhengyu Bao and Changhua Wei and Shuyun Xie and Shitou Wu",
abstract = "Ziyang County, Shaanxi Province, China is a world known selenium (Se)-enriched area, and a severe selenosis incident was reported in Naore Village during the 1990s. This study investigated the geochemical characteristics of Se and its fractions in Se-enriched rocks from Ziyang. Se distribution is uneven, ranging from 0.23 to 57.00 $\mu$g/g (17.29{\textpm}15.52 $\mu$g/g). Se content is higher in slate than chert, and even lower in carbonate rocks. Cd, As and V are enriched but Pb is depleted in Se-enriched strata. Se has different correlations both with TS (total sulfur) (R                                2=0.59 for chert) and TC (total carbon) (R                                2=0.77 for slate, R                                2=0.87 for carbonate). Se has significant positive correlations with V (r=0.65), As (r=0.485), Cd (r=0.459) and Pb (r=0.405). The Se level correlates with mineral content, positively with pyrite, chlorite and illite, negatively with albite. Se associated with sulfide/selenide and elemental Se are the predominant fractions of total recovered Se, suggesting that a reducing environment and the formation of sulfides were significant to Se deposition during its geochemical cycle. Although low concentration of bio-available Se (average 5.62{\%}{\textpm}3.69{\%}) may reduce the risk of Se poisoning in the target area, utilization of Se-rich rock as natural fertilizer should be restricted.",
doi = "10.1007/s12583-016-0700-x",
issn = "1867-111X",
journal = "Journal of Earth Science",
number = "5",
pages = "763--776",
title = "{G}eochemical characteristics of selenium and its correlation to other elements and minerals in selenium-enriched rocks in {Z}iyang {C}ounty, {S}haanxi {P}rovince, {C}hina",
url = "http://dx.doi.org/10.1007/s12583-016-0700-x",
volume = "27",
year = "2016",
}