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Geology, geochronology and isotopic geochemistry of the Xiaoliugou W-Mo ore field in the Qilian Orogen, NW China : case study of a skarn system formed during continental collision
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dc.contributor.author | Zheng, Yi | |
dc.contributor.author | Ding, Zhenju | |
dc.contributor.author | Cawood, Peter Anthony | |
dc.contributor.author | Yue, Suwei | |
dc.date.accessioned | 2017-01-31T00:32:33Z | |
dc.date.available | 2017-01-31T00:32:33Z | |
dc.date.issued | 2017-03 | |
dc.identifier | 240713217 | |
dc.identifier | 09d5e968-38b0-4a4b-9d7d-3c9aca2a91d3 | |
dc.identifier | 84957895154 | |
dc.identifier | 000390970400012 | |
dc.identifier.citation | Zheng , Y , Ding , Z , Cawood , P A & Yue , S 2017 , ' Geology, geochronology and isotopic geochemistry of the Xiaoliugou W-Mo ore field in the Qilian Orogen, NW China : case study of a skarn system formed during continental collision ' , Ore Geology Reviews , vol. 81 , no. Part 2 , pp. 575-586 . https://doi.org/10.1016/j.oregeorev.2016.01.013 | en |
dc.identifier.issn | 0169-1368 | |
dc.identifier.uri | https://hdl.handle.net/10023/10204 | |
dc.description | This study is financially supported by the National Natural Science Foundation of China (41502068). | en |
dc.description.abstract | The Xiaoliugou W-Mo ore field lies within the mid-Paleozoic North Qilian Orogen, NW China, and hosts a W resource of 48.8 Mt @ 0.4% and 412.6 Mt of Mo @ 0.075%. It contains five deposits, including Xiaoliugou, Qiqing, Guishan, Qibao and Shiji. The main mineralization styles at Xiaoliugou are skarn and veins in which the mineral sequence is scheelite > molybdenite > chalcopyrite and occurs in the endo- and exo-contact zones of granite intrusions. The scheelite-dominated orebodies are overprinted by molybdenite-dominated quartz veins. Two molybdenite samples yielded Silurian Re-Os model ages of 427.4 ± 6.0 Ma and 428.2 ± 6.0 Ma. Three muscovite samples coexisting with molybdenite yielded Middle Devonian Ar-Ar ages of 392.0 ± 2.7 Ma, 391.1 ± 2.7 Ma and 391.4 ± 2.8 Ma. The Re-Os and Ar-Ar ages indicate that the W-Mo mineralization and alteration occurred at ca. 428–391 Ma, which corresponds with regional continental collision within the Qilian Orogen. δ34S for the sulfides molybdenite and pyrite are 7.70–11.67 ‰ and 4.98–13.17 ‰, respectively. The 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb of the sulfides are 17.98–21.73, 15.34–18.81, and 37.18–38.63, respectively. The granites yield similar corrected (206Pb/204Pb)i, (207Pb/204Pb)i and (208Pb/204Pb)i, ranging 16.14–19.35, 15.44–15.63, and 37.41–38.31, respectively. Calculated δ18O of the fluid inclusions in quartz range from -3.38–2.34 ‰, whereas the δD of the hydrothermal fluids ranges from -94 to -47 ‰. The S-, Pb-, O- and D-isotopic data imply that the metals originated from the granite intrusion with a minor component sourced from the host sediments, and that the ore-forming fluids were dominated by magmatic-hydrothermal fluids mixed with minor meteoric water. | |
dc.format.extent | 17 | |
dc.format.extent | 2018796 | |
dc.language.iso | eng | |
dc.relation.ispartof | Ore Geology Reviews | en |
dc.subject | Xiaoliugou | en |
dc.subject | Skarn | en |
dc.subject | North Qilian Orogen | en |
dc.subject | Geochronology | en |
dc.subject | Isotope geochemistry | en |
dc.subject | Continental collision | en |
dc.subject | QE Geology | en |
dc.subject | NDAS | en |
dc.subject.lcc | QE | en |
dc.title | Geology, geochronology and isotopic geochemistry of the Xiaoliugou W-Mo ore field in the Qilian Orogen, NW China : case study of a skarn system formed during continental collision | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. Earth and Environmental Sciences | en |
dc.contributor.institution | University of St Andrews. School of Geography and Geosciences | en |
dc.contributor.institution | University of St Andrews. Scottish Oceans Institute | en |
dc.contributor.institution | University of St Andrews. St Andrews Isotope Geochemistry | en |
dc.identifier.doi | https://doi.org/10.1016/j.oregeorev.2016.01.013 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2017-01-30 |
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