Geological, geochronological, pyrite geochemical and stable isotope studies of the Tantou gold deposit in central China

摘要: Abstract The Tantou Au deposit is a large-scale gold in the Xiong’ershan area. A geochemical study of pyrite was conducted using laser ablation inductively coupled plasma mass spectrometry. Two types hydrothermal were identified ores and wall rocks, i.e., fine euhedral brecciated (Py1) coarse grains disseminated quartz-sulfide veins (Py2). trace elements two exhibit different concentrations, associations rim-core zoning, implying geneses crystallization processes. Both pyrites mineralization stages pyrite. However, Au, As, Co, Ni, Zn more rich Py1, while Ag, Cu, Mo, Sb, Pb favored Py2. growth rims Py1 suggest several pulses fluid activities. Hydrothermal sulfides from main ore-forming stage have Rb-Sr isochron age 124.2 ± 3.1 Ma, placing Early Cretaceous. initial 87Sr/86Sr value 0.71124 0.00010, suggesting an ancient crust source (the Paleoproterozoic Xiong’er Group). In situ S isotope data acquired that materials underwent isotopic fractionation because oxidation fluids during process. C-O values calcite postore indicate magmatic likely principle sources carbon low temperature alteration has had significant effect on levels CO2 carbonate ions. Together, these results genetically related to destruction North China Craton as result lithospheric thinning