Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/110103
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dc.contributor.authorWang, C.en
dc.contributor.authorZhang, D.en
dc.contributor.authorWu, G.en
dc.contributor.authorSantosh, M.en
dc.contributor.authorZhang, J.en
dc.contributor.authorXu, Y.en
dc.contributor.authorZhang, Y.en
dc.date.issued2014en
dc.identifier.citationMineralium Deposita, 2014; 49(6):733-749en
dc.identifier.issn0026-4598en
dc.identifier.issn1432-1866en
dc.identifier.urihttp://hdl.handle.net/2440/110103-
dc.description.abstractThe Lengshuikeng ore district in east-central China has an ore reserve of ∼43 Mt with an average grade of 204.53 g/t Ag and 4.63% Pb + Zn. Based on contrasting geological characteristics, the mineralization in the Lengshuikeng ore district can be divided into porphyry-hosted and stratabound types. The porphyry-hosted mineralization is distributed in and around the Lengshuikeng granite porphyry and shows a distinct alteration zoning including minor chloritization and sericitization in the proximal zone; sericitization, silicification, and carbonatization in the peripheral zone; and sericitization and carbonatization in the distal zone. The stratabound mineralization occurs in volcano-sedimentary rocks at ∼100–400 m depth without obvious zoning of alterations and ore minerals. Porphyry-hosted and stratabound mineralization are both characterized by early-stage pyrite–chalcopyrite–sphalerite, middle-stage acanthite–native silver–galena–sphalerite, and late-stage pyrite–quartz–calcite. The δ³⁴S values of pyrite, sphalerite, and galena in the ores range from −3.8 to +6.9‰ with an average of +2.0‰. The C–O isotope values of siderite, calcite, and dolomite range from −7.2 to −1.5‰ with an average of −4.4‰ (V-PDB) and from +10.9 to +19.5‰ with an average of +14.8‰ (V-SMOW), respectively. Hydrogen, oxygen, and carbon isotopes indicate that the hydrothermal fluids were derived mainly from meteoric water, with addition of minor amounts of magmatic water. Geochronology employing LA–ICP–MS analyses of zircons from a quartz syenite porphyry yielded a weighted mean ²⁰⁶Pb/²³⁸U age of 136.3 ± 0.8 Ma considered as the emplacement age of the porphyry. Rb–Sr dating of sphalerite from the main ore stage yielded an age of 126.9 ± 7.1 Ma, marking the time of mineralization. The Lengshuikeng mineralization classifies as an epithermal Ag–Pb–Zn deposit.en
dc.description.statementofresponsibilityChangming Wang, Da Zhang, Ganguo Wu, M. Santosh, Jing Zhang, Yigan Xu, Yaoyao Zhangen
dc.language.isoenen
dc.publisherSpringeren
dc.rights© Springer-Verlag Berlin Heidelberg 2014en
dc.subjectStable isotope; geochemistry; porphyry; stratabound; Ag–Pb–Zn; Lengshuikengen
dc.titleGeological and isotopic evidence for magmatic-hydrothermal origin of the Ag–Pb–Zn deposits in the Lengshuikeng District, east-central Chinaen
dc.typeJournal articleen
dc.identifier.rmid0030044235en
dc.identifier.doi10.1007/s00126-014-0521-8en
dc.identifier.pubid234997-
pubs.library.collectionGeology & Geophysics publicationsen
pubs.library.teamDS14en
pubs.verification-statusVerifieden
pubs.publication-statusPublisheden
dc.identifier.orcidSantosh, M. [0000-0002-1073-8477]en
Appears in Collections:Geology & Geophysics publications

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