Abstract:

Jinding lead-zinc deposit is located in the middle of Lanping Basin in Yunnan Province, and its ore controlling structure is Jinding thrust nappe. The fluid inclusions and sulfur isotope studies show that sulfur of the deposit belongs to normal sedimentary system and shares characteristics of bioorganic process; homogenization temperature of ore-forming fluid is 72.9 to 490 ℃; salinity is 7.4% to 16.9%; mineralization pressure is 85 to 230 MPa; ore-forming fluid pH is 5.36 to 7.09; Eh value is -0.44 to 1.17 V. The deposit formed in Cenozoic intracontinental tectonic activities. Long-term activities of Bijiang River fault and mineral hot brine, injecting into Jinding vaulting, result in the forming of Jinding lead-zinc deposit.

Key words: lead-zinc deposit, sulfur isotope, ore-forming , fluid, mineralization, Jinding, Yunnan