Geochemistry of pyrite from stratabound massive sulfide deposits, Tongling region, China: implication for its genesis

•Xinqiao and Taoyuan deposits are typical stratabound massive sulfide deposits.•Colloform (Py1), fine-grained (Py2) and medium- to coarse-grained (Py3) are identified.•Pyrites are magmatic-hydrothermal origin.•Stratabound ore precipitated from the magmatic-hydrothermal fluid.•A sedimentary component was involved in the stratabound mineralization.