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Bajiazi |
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Liaoning, China |
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Zn Pb Ag
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Super Porphyry Cu and Au
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IOCG Deposits - 70 papers
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All papers now Open Access.
Available as Full Text for direct download or on request. |
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The Bajiazi Zn-Pb-Ag skarn deposit is located in northwest Liaoning Province, China.
The orebodies occur at the contact zone between Yanshanian (170-177.4 Ma) quartz monzodiorite intrusives and Middle Proterozoic dolomitic marble of the Gaoyuzhuang Formation as well as along the NW- and NS-trending fault systems in carbonate wall rocks.
There is a pronounced zoning of the metasomatic mineralisation within the deposit, from the intrusive contact zone, outward to to dolomitic marble along the NW-trending fault system, with three ore-bearing skarn zones being distinguished, as follows:
i). Magnesian skarn zone with Fe and Mo - composed of diopside, forsterite, tremolite, spinel, phlogopite, chondrodite, and serpentine, accompanied by magnetite, pyrite, and molybdenite;
ii). Manganoan-magnesian skarn zone with Cu-S-Fe-Pb-Zn-Ag - which consists mainly of manganoan diopside, manganoan tremolite, mangano-anthophyllite, and manganocummingtonite with minor spessartine and pyroxmangite. The associated metallic minerals are pyrite, pyrrhotite, and chalcopyrite, with subordinate magnetite, sphalerite, galena, and Ag-bearing minerals;
iii). Manganoan skarn zone with Zn-Pb-Ag, composed chiefly of spessartine, pyroxmangite, magnesian rhodonite, manganocummingtonite, and manganopyrosmalite, with the associated ore minerals sphalerite, galena, alabandite, and Ag-bearing minerals.
For detail consult the reference(s) listed below.
The most recent source geological information used to prepare this decription was dated: 2004.
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd. Unauthorised copying, reproduction, storage or dissemination prohibited.
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Yiming Zhao, Yongguan Dong, Daxin Li, Chengsi Bi 2003 - Geology, mineralogy, geochemistry and zonation of the Bajiazi dolostone hosted Zn-Pb-Ag skarn deposit, Liaoning Province, China: in Ore Geology Reviews v23 pp 153-182
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