Fig. 5

(a) Photographs of the pale-yellow sphalerite (Sp1)-calcite (Cal-2) veins and the areas of LA-MC-ICP-MS calcite U–Pb isotope analyses and U–Pb ages for (b) pre-ore calcite (Cal-1); (c) pale-yellow sphalerite (Sp1)-related calcite (Cal-2); (d) photographs of the yellow–brown sphalerite (Sp2)-pyrite (Py2)-calcite (Cal-3) veins; (e) the areas of LA-MC-ICP-MS calcite U–Pb isotope analyses and U–Pb ages for yellow–brown sphalerite (Sp2)-related calcite (Cal-3); (f–h) cathodoluminescence (CL) images of pre-ore calcite (Cal-1) and syn-ore calcite (Cal-2; Cal-3) crystals from the Limei and Danaopo deposits.