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- W3011492034 endingPage "103481" @default.
- W3011492034 startingPage "103481" @default.
- W3011492034 abstract "Abstract Mesozoic subduction of Neo-Tethyan oceanic crust caused magmatism that formed numerous Jurassic and Cretaceous intrusions within the southern Gangdese belt of Tibet. These intrusions are associated with the formation of giant Jurassic Xiongcun porphyry Cu deposits, but the prospectivity of other Cretaceous intrusions in this area remains unclear. This study presents new molybdenite Re–Os ages for the Kelu and Sangbujiala Cu–Au skarn deposits within the southern Gangdese belt as well as new geochemical, zircon U–Pb geochronological, and Sr–Nd–Hf isotopic data for the intrusions associated with these deposits. These new data indicate that (1) the Kelu deposit formed at ca. 92 Ma, coeval with emplacement of the diorite and biotite granodiorite intrusions (ca. 92–90 Ma) in this area, and (2) the Sangbujiala deposit formed at ca. 95 Ma, contemporaneous with emplacement of the mineralized biotite granodiorite (ca. 95–92 Ma) in this area. These data suggest that the skarn Cu–Au mineralization in this area formed as a result of Cretaceous magmatism in the southern Gangdese belt. The intrusions associated with the Kelu and Sangbujiala deposits have adakitic affinities with low contents of Y and heavy rare-earth elements and high Sr/Y ratios (22.4–123). These intrusions also have more primitive Sr–Nd isotopic compositions (eNd(t) = 3.99–4.81, (87Sr/86Sr)i = 0.7040–0.7044), lower eHf(t) values (8.0–13.18), and higher zircon EuN/Eu* values (mean of 0.50) than those of contemporaneous but barren adakitic intrusions in this region. This suggests that the mineralization-related intrusions were oxidized and formed from magmas that were generated predominantly by partial melting of subducted Neo-Tethyan slab material without any significant crustal contamination or assimilation of sedimentary material. However, these intrusions contain elevated Th, Ni, and Cr contents, and have high Mg# ratios (43.4–56.9), suggesting that they formed from magmas that interacted with metasomatized mantle wedge peridotite material. Combining our new data with the results of previous research suggests that the southern Gangdese belt records two stages of Cu–Au mineralization related to Neo-Tethyan subduction. The first stage generated the large Xiongcun porphyry Cu–Au deposit and was associated with normal subduction during the Jurassic, whereas the second stage was associated with the formation of the Kelu and Sangbujiala skarn deposits during Cretaceous slab rollback." @default.
- W3011492034 created "2020-03-23" @default.
- W3011492034 creator A5004222428 @default.
- W3011492034 creator A5009906950 @default.
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- W3011492034 creator A5048022538 @default.
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- W3011492034 creator A5081926264 @default.
- W3011492034 creator A5088730038 @default.
- W3011492034 date "2020-07-01" @default.
- W3011492034 modified "2023-10-16" @default.
- W3011492034 title "Formation of the Cretaceous skarn Cu–Au deposits of the southern Gangdese belt, Tibet: Case studies of the Kelu and Sangbujiala deposits" @default.
- W3011492034 cites W1797283169 @default.
- W3011492034 cites W1836682774 @default.
- W3011492034 cites W1863002528 @default.
- W3011492034 cites W1965542928 @default.
- W3011492034 cites W1969818811 @default.
- W3011492034 cites W1989009845 @default.
- W3011492034 cites W1990479851 @default.
- W3011492034 cites W1991712311 @default.
- W3011492034 cites W1993478686 @default.
- W3011492034 cites W1996141548 @default.
- W3011492034 cites W2000174130 @default.
- W3011492034 cites W2002042565 @default.
- W3011492034 cites W2005807431 @default.
- W3011492034 cites W2008787240 @default.
- W3011492034 cites W2016872327 @default.
- W3011492034 cites W2019034794 @default.
- W3011492034 cites W2024436619 @default.
- W3011492034 cites W2024585020 @default.
- W3011492034 cites W2030661236 @default.
- W3011492034 cites W2031839367 @default.
- W3011492034 cites W2035670944 @default.
- W3011492034 cites W2038632830 @default.
- W3011492034 cites W2038775297 @default.
- W3011492034 cites W2041307874 @default.
- W3011492034 cites W2041837766 @default.
- W3011492034 cites W2042722986 @default.
- W3011492034 cites W2044394940 @default.
- W3011492034 cites W2044609027 @default.
- W3011492034 cites W2044921168 @default.
- W3011492034 cites W2046441274 @default.
- W3011492034 cites W2049077965 @default.
- W3011492034 cites W2053273118 @default.
- W3011492034 cites W2054590577 @default.
- W3011492034 cites W2059817759 @default.
- W3011492034 cites W2062828467 @default.
- W3011492034 cites W2068403951 @default.
- W3011492034 cites W2076395812 @default.
- W3011492034 cites W2081673195 @default.
- W3011492034 cites W2082002326 @default.
- W3011492034 cites W2083226499 @default.
- W3011492034 cites W2083330810 @default.
- W3011492034 cites W2088298798 @default.
- W3011492034 cites W2089055932 @default.
- W3011492034 cites W2091441425 @default.
- W3011492034 cites W2094545700 @default.
- W3011492034 cites W2098677480 @default.
- W3011492034 cites W2102290079 @default.
- W3011492034 cites W2110609253 @default.
- W3011492034 cites W2115518283 @default.
- W3011492034 cites W2121798167 @default.
- W3011492034 cites W2123819508 @default.
- W3011492034 cites W2128209044 @default.
- W3011492034 cites W2131793330 @default.
- W3011492034 cites W2135830789 @default.
- W3011492034 cites W2136388350 @default.
- W3011492034 cites W2136670075 @default.
- W3011492034 cites W2138522501 @default.
- W3011492034 cites W2143304112 @default.
- W3011492034 cites W2145087726 @default.
- W3011492034 cites W2145398769 @default.
- W3011492034 cites W2146116733 @default.
- W3011492034 cites W2146117929 @default.
- W3011492034 cites W2148928597 @default.
- W3011492034 cites W2156985625 @default.
- W3011492034 cites W2164911500 @default.
- W3011492034 cites W2227505540 @default.
- W3011492034 cites W2324896590 @default.
- W3011492034 cites W2325514473 @default.
- W3011492034 cites W2328556415 @default.
- W3011492034 cites W2403988321 @default.
- W3011492034 cites W2497832567 @default.
- W3011492034 cites W2564695062 @default.
- W3011492034 cites W2572043036 @default.
- W3011492034 cites W2617642049 @default.
- W3011492034 cites W2796977913 @default.
- W3011492034 cites W2890519805 @default.
- W3011492034 cites W2892736219 @default.
- W3011492034 cites W2904029246 @default.
- W3011492034 cites W2906349037 @default.
- W3011492034 cites W2947178630 @default.
- W3011492034 cites W2963986189 @default.
- W3011492034 cites W2979383590 @default.
- W3011492034 cites W4211136963 @default.
- W3011492034 cites W931988384 @default.