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• W2008394410 endingPage "80" @default.
• W2008394410 startingPage "60" @default.
• W2008394410 abstract "Qulong porphyry Cu deposit is the largest Cu deposit in China so far discovered, with total reserves of 10.6 Mt [email protected]% and 0.5 Mt [email protected]%. The petrogenesis of the Miocene intrusion and its genetic association with Cu mineralization have been debated. This study presents new results on whole rock major and trace elements, Sr–Nd isotopes, zircon U–Pb dating, Hf–O isotopic compositions of the Qulong ore-bearing and barren adakites. All the Qulong adakites studied here have low MgO (< 2 wt.%), high K2O (between 2 wt.% and 6 wt.%), with K2O/Na2O ratios ranging from 0.2–2.0. The SiO2 contents are mostly higher than 64 wt.%. These are dramatically different from ore-forming adakites in the circum-Pacific region and other places in general. Ore-bearing adakites have systematically higher SiO2 and K2O compared with barren ones, likely due to the addition of Si and K during alteration and mineralization. Magmatic zircons from these two series of intrusions have U–Pb ages of 16.6 ± 0.5–17.0 ± 0.6 Ma and 16.7 ± 0.3–17.4 ± 0.4 Ma, respectively, which are identical to each other within analytical errors but are systematically older than although marginally overlap with the Re–Os isochron ages of 15.36 ± 0.21–16.41 ± 0.48 Ma. The Qulong porphyries have geochemical characteristics of typical adakites, with Sr = 259–1195 ppm, Y = 1.91–9.12 ppm, Yb = 0.2–0.92 ppm, Sr/Y = 49–202 ppm, and (La/Yb)n = 13–49 for both ore-bearing and barren adakites. In a Sr/Y versus (La/Yb)n diagram, most of the samples plot in the low part of circum-Pacific field, close to the field defined by Dabie adakites. Some of the ore-bearing adakites even plot in the Dabie adakite field, indicating that both slab melts and lower continental crust melts have been involved. Zircons from the ore-bearing adakites have δ18O ranging from 5.1 to 7.3‰ (average 6.4‰) and εHf(t) from 1.9 to 10.4‰, which plot close to MORB. Similarly, zircons from the barren adakite have δ18O ranging from 4.0 to 7.4‰ (average 6.3‰) and εHf(t) from 5.6 to 9.3‰, mostly plotting close to MORB values, too. In-situ zircon Hf–O isotopic measurements for the most samples yield a binary mixing trend between mantle- and crustal-derived melts, with mantle-related sources as the main contributor. Whole-rock Sr–Nd isotopes also show small variations, with (87Sr/86Sr)i = 0.704904–0.705053 and εNd(t) = − 0.04–0.61. The dramatic differences between Qulong and circum-Pacific adakites suggest that either Qulong porphyry Cu deposit is unique, or the ore-bearing adakites are not the ore-forming porphyry. Considering the identical geochemical characteristics of the ore-bearing and barren adakites, the textures (some samples are not porphyry) and the systematically older ages compared to Re–Os isochron ages, the latter is preferred. In contrast to earlier adakitic granites, recently studied porphyries in the central phase of the Qulong deposit have zircon U–Pb ages identical to the Re–Os ages, and thus are more likely to be the ore-forming porphyry. All these suggest that slab melting rather than partial melting of Gangdese arc materials is responsible to the Qulong porphyry Cu deposit." @default.
• W2008394410 created "2016-06-24" @default.
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• W2008394410 date "2015-04-01" @default.
• W2008394410 modified "2023-10-15" @default.
• W2008394410 title "The formation of Qulong adakites and their relationship with porphyry copper deposit: Geochemical constraints" @default.
• W2008394410 cites W1532396455 @default.
• W2008394410 cites W1578122124 @default.
• W2008394410 cites W1597063492 @default.
• W2008394410 cites W1836682774 @default.
• W2008394410 cites W1871734886 @default.
• W2008394410 cites W1965542928 @default.
• W2008394410 cites W1966034524 @default.
• W2008394410 cites W1966697494 @default.
• W2008394410 cites W1967810446 @default.
• W2008394410 cites W1968172080 @default.
• W2008394410 cites W1979705656 @default.
• W2008394410 cites W1979828445 @default.
• W2008394410 cites W1979907370 @default.
• W2008394410 cites W1982133624 @default.
• W2008394410 cites W1984432078 @default.
• W2008394410 cites W1985683327 @default.
• W2008394410 cites W1989009845 @default.
• W2008394410 cites W1992722024 @default.
• W2008394410 cites W1999448338 @default.
• W2008394410 cites W2001365371 @default.
• W2008394410 cites W2002042565 @default.
• W2008394410 cites W2005807431 @default.
• W2008394410 cites W2012512380 @default.
• W2008394410 cites W2012671384 @default.
• W2008394410 cites W2016885113 @default.
• W2008394410 cites W2019748000 @default.
• W2008394410 cites W2022665116 @default.
• W2008394410 cites W2023273750 @default.
• W2008394410 cites W2023558113 @default.
• W2008394410 cites W2028823240 @default.
• W2008394410 cites W2035185474 @default.
• W2008394410 cites W2041837766 @default.
• W2008394410 cites W2042984273 @default.
• W2008394410 cites W2043521417 @default.
• W2008394410 cites W2045173412 @default.
• W2008394410 cites W2047578041 @default.
• W2008394410 cites W2048857036 @default.
• W2008394410 cites W2049451277 @default.
• W2008394410 cites W2050995324 @default.
• W2008394410 cites W2051273227 @default.
• W2008394410 cites W2053459594 @default.
• W2008394410 cites W2054368497 @default.
• W2008394410 cites W2054590577 @default.
• W2008394410 cites W2057550910 @default.
• W2008394410 cites W2059010589 @default.
• W2008394410 cites W2059497122 @default.
• W2008394410 cites W2059761402 @default.
• W2008394410 cites W2068403951 @default.
• W2008394410 cites W2070560984 @default.
• W2008394410 cites W2079273023 @default.
• W2008394410 cites W2079640846 @default.
• W2008394410 cites W2089411017 @default.
• W2008394410 cites W2089615853 @default.
• W2008394410 cites W2090613745 @default.
• W2008394410 cites W2090722451 @default.
• W2008394410 cites W2092235841 @default.
• W2008394410 cites W2096276260 @default.
• W2008394410 cites W2098677480 @default.
• W2008394410 cites W2099932450 @default.
• W2008394410 cites W2105488103 @default.
• W2008394410 cites W2110129020 @default.
• W2008394410 cites W2114730569 @default.
• W2008394410 cites W2115518283 @default.
• W2008394410 cites W2121665599 @default.
• W2008394410 cites W2123542517 @default.
• W2008394410 cites W2128209044 @default.
• W2008394410 cites W2128253563 @default.
• W2008394410 cites W2131425971 @default.
• W2008394410 cites W2131793330 @default.
• W2008394410 cites W2132179193 @default.
• W2008394410 cites W2135214884 @default.
• W2008394410 cites W2135273467 @default.
• W2008394410 cites W2136670075 @default.
• W2008394410 cites W2137470957 @default.
• W2008394410 cites W2137478736 @default.
• W2008394410 cites W2138522501 @default.
• W2008394410 cites W2140093647 @default.
• W2008394410 cites W2141659671 @default.
• W2008394410 cites W2142145377 @default.
• W2008394410 cites W2143304112 @default.

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