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YANG, TAO, ZHU, LAIMIN, WANG, FEI, GONG, HUJUN, LU, RUKUI (2013) Geochemistry, petrogenesis and tectonic implications of granitic plutons at the Liziyuan orogenic goldfield in the Western Qinling Orogen, central China. Geological Magazine, 150 (1) 50-71 doi:10.1017/s0016756812000283

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Reference TypeJournal (article/letter/editorial)
TitleGeochemistry, petrogenesis and tectonic implications of granitic plutons at the Liziyuan orogenic goldfield in the Western Qinling Orogen, central China
JournalGeological Magazine
AuthorsYANG, TAOAuthor
ZHU, LAIMINAuthor
WANG, FEIAuthor
GONG, HUJUNAuthor
LU, RUKUIAuthor
Year2013 (January)Volume150
Page(s)50-71Issue1
PublisherCambridge University Press (CUP)
DOIdoi:10.1017/s0016756812000283Search in ResearchGate
Mindat Ref. ID260710Long-form Identifiermindat:1:5:260710:2
GUID5677310e-a990-484a-b7e2-d338d419f155
Full ReferenceYANG, TAO, ZHU, LAIMIN, WANG, FEI, GONG, HUJUN, LU, RUKUI (2013) Geochemistry, petrogenesis and tectonic implications of granitic plutons at the Liziyuan orogenic goldfield in the Western Qinling Orogen, central China. Geological Magazine, 150 (1) 50-71 doi:10.1017/s0016756812000283
Plain TextYANG, TAO, ZHU, LAIMIN, WANG, FEI, GONG, HUJUN, LU, RUKUI (2013) Geochemistry, petrogenesis and tectonic implications of granitic plutons at the Liziyuan orogenic goldfield in the Western Qinling Orogen, central China. Geological Magazine, 150 (1) 50-71 doi:10.1017/s0016756812000283
In(2013, January) Geological Magazine Vol. 150 (1) Cambridge University Press (CUP)
Abstract/NotesAbstractThe Liziyuan goldfield is located along the northern margin of the western part of the Qinling Orogen (WQO). The goldfield consists of five gold-only deposits hosted by metavolcanic rocks, and one polymetallic (Auā€“Agā€“Pb) deposit hosted by the Tianzishan Monzogranite. As the Liziyuan goldfield appears to be spatially and temporally related to the Jiancaowan Porphyry, the study of the deposit provides a crucial insight into the relationship between tectonic-magmatic events and gold metallogenesis in the WQO. In this paper, we present whole-rock major and trace element geochemistry, and in situ zircon Uā€“Pb and Luā€“Hf isotopic data from the Tianzishan Monzogranite and Jiancaowan Porphyry. The two granitic plutons are enriched in LILEs and LREEs, depleted in HFSEs and have zircon ĪµHf(t) values between āˆ’14.1 and āˆ’5.1 for the Tianzishan Monzogranite and between āˆ’21.0 and āˆ’8.4 for the Jiancaowan Porphyry. These characteristics indicate that the granites are derived from the crust. The Tianzishan Monzogranite has LA-ICP-MS zircon Uā€“Pb ages of 256.1 Ā± 3.7 to 260.0 Ā± 2.1 Ma, which suggests that it was emplaced in the WQO during the convergence of the North and South (Yangtze) China cratons in the early stage of the Qinling Orogeny. In contrast, the porphyry has a LA-ICP-MS zircon Uā€“Pb age of 229.2 Ā± 1.2 Ma, which is younger than the peak collision age, but corresponds to the widespread Late Triassic post-collisional granitic plutons in the WQO. The Tianzishan Monzogranite has somewhat higher Sr contents (196ā€“631 ppm), lower Y (2.23ā€“19.6 ppm) and Yb (0.20ā€“2.01 ppm) contents, and a positive Eu/Eu* averaging 1.15. These characteristics suggest the pluton was derived from partial melting of the thickened crust. In contrast, the relatively higher MgO content (0.85ā€“2.08 wt%) and Mg no. (43.4ā€“58.2) of the Jiancaowan Porphyry indicates that insignificant amounts of subcontinental lithospheric mantle-derived mafic melts were involved in the generation of the magma. The Liziyuan goldfield is hosted by faults in greenschist-facies metamorphic rocks. Fluid inclusion studies suggest that gold was precipitated from CO2-rich, low-salinity and medium temperature fluids. This feature is consistent with the other orogenic gold deposits throughout the world. The field relationships and zircon Uā€“Pb ages of the two granitic plutons suggest that gold mineralization is coeval with or slightly younger than the emplacement of the Jiancaowan Porphyry. Therefore, both the porphyry and deposit formed during the post-collisional stage of the Qinling Orogen.

References Listed

These are the references the publisher has listed as being connected to the article. Please check the article itself for the full list of references which may differ. Not all references are currently linkable within the Digital Library.

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Groves (2003) Economic Geology Gold deposits in metamorphic belts: overview of current understanding, outstanding problems, future research, and exploration significance 98, 1


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