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

Figure 7

Photomicrographs showing the types and distribution of fluid inclusions observed in the Zhijiadi deposit. (a) Primary aqueous (W-type) inclusions coexisting with daughter mineral-bearing (S-type) inclusions in the main stage fluorite and these secondary W-type inclusions in a linear distribution penetrating crystal boundaries of fluorite. (b) Cluster of primary W-type inclusions in the main stage sphalerite and these secondary W-type inclusions penetrating crystal boundaries of sphalerite. (c) W-type inclusions clustered in the early stage quartz. (d) Primary W-type inclusions clustered in the main stage rhodochrosite. (e) Isolation of W-type inclusions from the main stage sphalerite. (f) Coexistence of aqueous-carbonic (C-type) inclusions and W-type inclusions in the early stage quartz crystals; C-type inclusions in the main stage fluorite (g) and sphalerite (h); (i) S-type inclusions in main stage fluorite (daughter minerals including calcite and dolomite), showing an obvious difference from the secondary W-type inclusions; (j) calcite-bearing S-type inclusions with CO₂ vapour bubble in the main stage fluorite; (k) marcasite-bearing S-type inclusions in the early stage quartz; (l) chalcopyrite-bearing S-type inclusions in the main stage sphalerite. , vapour CO₂; , liquid CO₂; , vapour H₂O; , liquid H₂O; Qz, quartz; Rds, rhodochrosite; Fl, fluorite; Sp, sphalerite; Cal, calcite; Dol, dolomite; Mrc, marcasite.

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