Formation age and genesis of the Gongchangling Neoarchean banded iron deposit in eastern Liaoning Province: Constraints from geochemistry and SHRIMP zircon U-Pb dating

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dc.contributor.authorHan, C.
dc.contributor.authorXiao, W.
dc.contributor.authorSu, B.-X.
dc.contributor.authorSakyi, P.A.
dc.contributor.authorChen, Z.
dc.contributor.authorZhang, X.
dc.contributor.authorAo, S.
dc.contributor.authorZhang, J.
dc.contributor.authorWan, B.
dc.contributor.authorZhang, Z.
dc.contributor.authorWang, Z.
dc.contributor.authorDing, J.
dc.date.accessioned2018-11-08T14:39:03Z
dc.date.available2018-11-08T14:39:03Z
dc.date.issued2014-11
dc.description.abstractThe Gongchang iron deposit, a typical Algoma-type banded iron formation (BIF) deposit located in the Eastern Block of the North China Craton (NCC), is hosted in Neoarchean metamorphic rocks, including amphibolite, biotite leptynite, garnet biotite schist, plagioclase-hornblende schist, garnet chlorite schist, muscovite quartz schist and actinolite magnetite quartzite. Geochemical data suggest that protoliths of the amphibolites and biotite leptynite should be basalt and dacite, respectively. SHRIMP U-Pb dating of zircons from the plagioclase-hornblende schist shows that the Gongchangling iron deposit was formed at 2554±12Ma. Major elements and REE data of the ores indicate that the Gongchangling BIF precipitated from seawater, and the ultimate iron and silica origins may have been related to nearby volcanic activity. The δ18O values of quartz from the BIFs range between 9.1 and 12.9‰, suggesting that exotic high δ18O fluids were involved during metamorphism. The pyrite have δ34S values of range between -3.5‰ and 14.7‰, suggesting that mineralization were originally from metamorphism. Comparison of the mineralization age of the Gongchangling BIF with those of other local BIFs in North China and other cratons throughout the world indicates that the Gongchangling BIF formed coevally with the global BIF mineralization at ~2.5Ga. Taken together, these data suggest that the Gongchangling iron deposit was formed in a volcanic submarine environment in which hydrothermal fluids associated with volcanic activity supplied both iron and silica for the banded iron formations. © 2014 Elsevier B.V..en_US
dc.identifier.otherVolume 254,Pages 306-322
dc.identifier.otherhttps://doi.org/10.1016/j.precamres.2014.09.007
dc.identifier.urihttp://ugspace.ug.edu.gh/handle/123456789/25424
dc.language.isoenen_US
dc.publisherPrecambrian Researchen_US
dc.subjectGongchanglingen_US
dc.subjectNeoarchean BIFen_US
dc.subjectNorth China Cratonen_US
dc.subjectSHRIMP U-Pb datingen_US
dc.titleFormation age and genesis of the Gongchangling Neoarchean banded iron deposit in eastern Liaoning Province: Constraints from geochemistry and SHRIMP zircon U-Pb datingen_US
dc.typeArticleen_US

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