Genesis of the Zhijiadi Ag-Pb-Zn Deposit, Central North China Craton: Constraints from Fluid Inclusions and Stable Isotope Data

Figure 4

Photographs of hand specimens, photomicrographs, and back-scatter election (BSE) images showing ore fabrics and mineral assemblages of the Zhijiadi deposit. (a) Galena and sphalerite filling in hydrothermal breccia. (b) Galena and sphalerite occurring as vein in near F₂ fault zone. (c) Native silver in the gangue minerals. (d) Pyrite disseminated in plagioclase phenocryst of quartz porphyry. (e) The early stage quartz and pyrite replaced by galena. (f) Euhedral-subhedral fluorite replaced by rhodochrosite. (g) Coexistence of sphalerite and rhodochrosite in the main stage and replaced by galena (BSE). (h) Chalcopyrite as emulsion droplet within sphalerite, making an exsolution texture. (i) Euhedral-subhedral pyrite replaced by galena. (j) Galena intergrowth with sphalerite in the main stage. (k) Argentite and acanthite intergrow with galena. (l) Corrugation structure in galena caused by the stress effect. Py, pyrite; Gn, galena; Sp, sphalerite; Ccp, chalcopyrite; Arg, argentite; Qz, quartz; Rds, rhodochrosite; Fl, fluorite; Cal, calcite; Pl, plagioclase; Dol, dolomite.

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