Extreme variation of sulfur isotopic compositions in pyrite from the Qiuling sediment-hosted gold deposit, West Qinling orogen, central China: An in situ SIMS study with implications for the source of sulfur - Chen, Lei; Li, Xian-hua; Li, Jian-wei; Hofstra, Albert; Liu, Yu; Koenig, Alan (Mineralium Deposita, 2015)