U/Pb dating of geodic calcite: new insights on Western Europe major tectonic events and associated diagenetic fluids PisapiaCèline DeschampsPierre BattaniAnne BuschaertStèphane GuihouAbel HamelinBruno BrulhetJacques 2017 Pb/Pb diagrams, <sup>238</sup>U and <sup>235</sup>U series isochron diagrams and effect of blank correction on U and Pb isotopic compositions and on ages calculation