Pore Variation Characteristics of Altered Wall Rocks in the Huize Lead–Zinc Deposit, Yunnan, China and Their Geological Significance

The porosity and permeability of the rock surrounding lead–zinc deposits are key factors for controlling migration precipitation ore-forming hydrothermal fluid. In this paper, Huize super-large deposit was taken as case study, variations in wall rocks their relationship with orebody were analyzed by using CT scanning technology. experimental results showed that average pore radius dolomite a decreasing distance to ranged from 1.60 1.65 μm, increasing 1.77~2.05 μm. increased 2.76%–2.81% 3.35%–3.99%. throat length decreased 29.57–39.95 μm 13.57–16.83 research, it found fluids rich chemical elements changed properties rocks. Temperature rise will lead dolomitization limestone recrystallization dolomite. This process led an increase During formation orebody, metal minerals fluid entered pores rock. As result, volume reduced, along length. Therefore, near isolated each other, decreased. variation characteristics at various distances mine can be used discover orebodies.