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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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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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Selected References:
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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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Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge. It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published. While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo, its employees and servants: i). do not warrant, or make any representation regarding the use, or results of the use of the information contained herein as to its correctness, accuracy, currency, or otherwise; and ii). expressly disclaim all liability or responsibility to any person using the information or conclusions contained herein.
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