Matches in SemOpenAlex for { <https://semopenalex.org/work/W4220808601> ?p ?o ?g. }
- W4220808601 endingPage "165" @default.
- W4220808601 startingPage "149" @default.
- W4220808601 abstract "To investigate the mechanism of magma emplacement of the intruded zoned pluton, we report high-precision Ca isotopic data of 23 granitoids (including granodiorite and quartz diorite), 5 mafic enclaves, and 7 hornblende and plagioclase mineral pairs from the Early Cretaceous Fangshan pluton, Beijing, China. Δ44/40CaHbl-Pl of rocks span from 0.02 ± 0.15‰ to 0.23 ± 0.12‰, which likely reflects equilibrium inter-mineral isotope fractionation. The granodiorites exhibit ∼0.30‰ variation in Ca isotopic compositions, with δ44/40Ca ranging from 0.47 ± 0.08‰ to 0.77 ± 0.09‰. The diorites and the enclaves yield δ44/40Ca of 0.51 ± 0.03‰ to 0.64 ± 0.05‰, and 0.54 ± 0.06‰ to 0.66 ± 0.11‰, respectively, which are lower than that of the upper continental crust (0.72 ± 0.10‰). Ca isotopic variation cannot be ascribed to K decay due to their low εCa values (< ±1.0). Theoretical study showed that Hbl fractional crystallization could counteract Ca isotope fractionation effect of their co-existing Pl crystallization. Source heterogeneity cannot account for Ca isotopic variation because δ44/40Ca does not correlate to (87Sr/86Sr)i. Instead, the Ca isotopic variation is likely controlled by partial melting and residual mineralogy. Specifically, δ44/40Ca of the granodiorites are negatively correlated with (Dy/Yb)N, reflecting various magma pools derived from different crustal depths with clinopyroxene and garnet residua. Modeling calculations suggest that the low Ca isotopic signature can be caused by ∼10% partial melting of sources with various proportions of garnet and clinopyroxene (from 5% garnet + 95% clinopyroxene to 40% garnet + 60% clinopyroxene). The diorites intruded earlier than the granodiorites, which can be slightly contaminated by surrounding basement rock. Ca isotopic compositions of enclaves are similar to those of their host rocks. Considering the spatial structure of the Fangshan pluton, it should be assembled by at least four magma pulses derived from various crustal depths through ballooning. Our results show that Ca isotopes can be used as a potential tool to trace magma source depth and decipher the process of magma emplacement of intrusive pluton, which is important to understand the continental crustal growth." @default.
- W4220808601 created "2022-04-03" @default.
- W4220808601 creator A5004156487 @default.
- W4220808601 creator A5005185717 @default.
- W4220808601 creator A5022526821 @default.
- W4220808601 creator A5038178096 @default.
- W4220808601 creator A5085025467 @default.
- W4220808601 date "2022-06-01" @default.
- W4220808601 modified "2023-10-18" @default.
- W4220808601 title "Ca isotopic compositions of zoned granitoid intrusion: Implications for the emplacement and evolution of magma bodies" @default.
- W4220808601 cites W1441318154 @default.
- W4220808601 cites W1688191693 @default.
- W4220808601 cites W1964645800 @default.
- W4220808601 cites W1969216041 @default.
- W4220808601 cites W1969859799 @default.
- W4220808601 cites W1974914253 @default.
- W4220808601 cites W1977431633 @default.
- W4220808601 cites W1977705982 @default.
- W4220808601 cites W1979705656 @default.
- W4220808601 cites W1982922846 @default.
- W4220808601 cites W1983052808 @default.
- W4220808601 cites W2010194005 @default.
- W4220808601 cites W2011607179 @default.
- W4220808601 cites W2027625557 @default.
- W4220808601 cites W2029281066 @default.
- W4220808601 cites W2032707538 @default.
- W4220808601 cites W2040126025 @default.
- W4220808601 cites W2040549377 @default.
- W4220808601 cites W2041989597 @default.
- W4220808601 cites W2044921168 @default.
- W4220808601 cites W2050410955 @default.
- W4220808601 cites W2051076426 @default.
- W4220808601 cites W2053550643 @default.
- W4220808601 cites W2054057185 @default.
- W4220808601 cites W2056969909 @default.
- W4220808601 cites W2057884798 @default.
- W4220808601 cites W2065568183 @default.
- W4220808601 cites W2068649164 @default.
- W4220808601 cites W2069647204 @default.
- W4220808601 cites W2071324209 @default.
- W4220808601 cites W2072896153 @default.
- W4220808601 cites W2078924144 @default.
- W4220808601 cites W2085987682 @default.
- W4220808601 cites W2087075409 @default.
- W4220808601 cites W2087658693 @default.
- W4220808601 cites W2092151651 @default.
- W4220808601 cites W2100117945 @default.
- W4220808601 cites W2110601361 @default.
- W4220808601 cites W2111215123 @default.
- W4220808601 cites W2118235673 @default.
- W4220808601 cites W2128253563 @default.
- W4220808601 cites W2132314422 @default.
- W4220808601 cites W2133103627 @default.
- W4220808601 cites W2134099313 @default.
- W4220808601 cites W2138522501 @default.
- W4220808601 cites W2150862234 @default.
- W4220808601 cites W2159104880 @default.
- W4220808601 cites W2165372763 @default.
- W4220808601 cites W2167856052 @default.
- W4220808601 cites W2184146635 @default.
- W4220808601 cites W2222367795 @default.
- W4220808601 cites W2325514473 @default.
- W4220808601 cites W2430630579 @default.
- W4220808601 cites W2477720359 @default.
- W4220808601 cites W2497126039 @default.
- W4220808601 cites W2531415415 @default.
- W4220808601 cites W2562384594 @default.
- W4220808601 cites W2602839312 @default.
- W4220808601 cites W2605466379 @default.
- W4220808601 cites W2734995931 @default.
- W4220808601 cites W2742753304 @default.
- W4220808601 cites W2770581961 @default.
- W4220808601 cites W2785727153 @default.
- W4220808601 cites W2792781809 @default.
- W4220808601 cites W2812436445 @default.
- W4220808601 cites W2884477173 @default.
- W4220808601 cites W2887787268 @default.
- W4220808601 cites W2906425831 @default.
- W4220808601 cites W2912709870 @default.
- W4220808601 cites W2914359005 @default.
- W4220808601 cites W2915034788 @default.
- W4220808601 cites W2940480890 @default.
- W4220808601 cites W2947811365 @default.
- W4220808601 cites W2952229693 @default.
- W4220808601 cites W2952680691 @default.
- W4220808601 cites W2973603256 @default.
- W4220808601 cites W2975209376 @default.
- W4220808601 cites W2987394515 @default.
- W4220808601 cites W2989654896 @default.
- W4220808601 cites W2995140446 @default.
- W4220808601 cites W2998826258 @default.
- W4220808601 cites W3003863800 @default.
- W4220808601 cites W3009942831 @default.
- W4220808601 cites W3022064946 @default.
- W4220808601 cites W3083944203 @default.
- W4220808601 cites W3090067134 @default.
- W4220808601 cites W3105318926 @default.
- W4220808601 cites W3115711588 @default.