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• W2286172617 abstract "Abstract The late Palaeoproterozoic to early Mesoproterozoic igneous rocks of southwestern China are characterized by a number of mafic intrusions and dykes. However, the origin and tectonic implications of these mafic intrusions and dykes remain unclear. The Hekou mafic intrusion, intruding into the Hekou Group in the Hekou area, SW China, is the biggest and most representative one. The intrusion is mainly composed of coarse-grained in the central zone (CZ) and medium- to fine-grained gabbroic rocks in the outer zone (OZ). Cameca secondary ion mass spectroscopy (SIMS) U–Pb zircon ages, and geochemical and Nd isotopic results for the intrusion are reported in this paper. SIMS U–Pb zircon ages indicate that the gabbroic rocks from the CZ and OZ were emplaced at 1735±6.5 Ma and 1736±4.0 Ma, respectively. This suggests that the Hekou intrusion originated from c . 1.7 Ga mafic magmatism in the southwestern Yangtze Block. The coarse-grained rocks in the CZ of the intrusion show fairly homogeneous major- and trace-element compositions. In contrast, the medium- to fine-grained rocks from the OZ display slightly evolved compositions, with relatively lower Mg nos, MgO, Al 2 O 3 , Cr and Ni contents, and higher SiO 2 , CaO and Zr concentrations than those of the rocks from the CZ. Although the gabbroic rocks of the intrusion have low total rare earth element (REE) contents (REE = 29.3–40.2 ppm) with slightly light REE (LREE)-enriched and heavy REE (HREE)-depleted patterns, they exhibit distinct trace-element and Nd isotopic features. The rocks from the CZ are characterized by slightly LREE-enriched and ‘convex upwards’ incompatible trace-element patterns with significant Th depletion and insignificant Nb and Ta depletion relative to La. However, the rocks from the OZ have relatively flatter REE patterns than those of the rocks from the CZ. In addition, the rocks from the OZ are slightly enriched in Th and depleted in Nb and Ta relative to La. The ε Nd (T) values of the CZ and the OZ rocks are +0.70 to +2.3 and −0.30 to +0.24, respectively. The parental magma for the Hekou gabbroic intrusion exhibits affinity with a subalkaline basaltic magma, which was possibly generated by relatively high degrees of partial melting of a slightly depleted asthenospheric mantle source. Their geochemical and isotopic variations were due to slight crystal fractionation with varying degrees of crustal contamination. The Hekou intrusion was therefore supposed to form in an anorogenic extensional environment. It is further suggested that c . 1.7 Ga is an important onset timing of widespread anorogenic magmatism in the southwestern Yangtze Block. We interpret the late Palaeoproterozoic gabbroic intrusion to represent anorogenic mafic magmatism, which was most likely related to the break-up of the Columbia supercontinent." @default.
• W2286172617 created "2016-06-24" @default.
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• W2286172617 date "2016-02-09" @default.
• W2286172617 modified "2023-09-25" @default.
• W2286172617 title "The origin of the <i>c</i>. 1.7 Ga gabbroic intrusion in the Hekou area, SW China: constraints from SIMS U–Pb zircon geochronology and elemental and Nd isotopic geochemistry" @default.
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• W2286172617 cites W1964957427 @default.
• W2286172617 cites W1965625536 @default.
• W2286172617 cites W1967910599 @default.
• W2286172617 cites W1973012528 @default.
• W2286172617 cites W1973308233 @default.
• W2286172617 cites W1975676133 @default.
• W2286172617 cites W1976609961 @default.
• W2286172617 cites W1978402651 @default.
• W2286172617 cites W1979854640 @default.
• W2286172617 cites W1982522964 @default.
• W2286172617 cites W1985661185 @default.
• W2286172617 cites W1988215475 @default.
• W2286172617 cites W1991520358 @default.
• W2286172617 cites W1992397022 @default.
• W2286172617 cites W2004206610 @default.
• W2286172617 cites W2009805159 @default.
• W2286172617 cites W2026955258 @default.
• W2286172617 cites W2027731616 @default.
• W2286172617 cites W2028071342 @default.
• W2286172617 cites W2029184354 @default.
• W2286172617 cites W2031194632 @default.
• W2286172617 cites W2035595872 @default.
• W2286172617 cites W2036153230 @default.
• W2286172617 cites W2036325370 @default.
• W2286172617 cites W2037042724 @default.
• W2286172617 cites W2037941752 @default.
• W2286172617 cites W2047274210 @default.
• W2286172617 cites W2048240400 @default.
• W2286172617 cites W2052964693 @default.
• W2286172617 cites W2054128597 @default.
• W2286172617 cites W2056525533 @default.
• W2286172617 cites W2065928479 @default.
• W2286172617 cites W2070104683 @default.
• W2286172617 cites W2074736234 @default.
• W2286172617 cites W2075031438 @default.
• W2286172617 cites W2076373269 @default.
• W2286172617 cites W2082075223 @default.
• W2286172617 cites W2082193234 @default.
• W2286172617 cites W2083558141 @default.
• W2286172617 cites W2086901116 @default.
• W2286172617 cites W2087335223 @default.
• W2286172617 cites W2089048002 @default.
• W2286172617 cites W2089187322 @default.
• W2286172617 cites W2089421065 @default.
• W2286172617 cites W2090058626 @default.
• W2286172617 cites W2091755659 @default.
• W2286172617 cites W2092241581 @default.
• W2286172617 cites W2092550321 @default.
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• W2286172617 doi "https://doi.org/10.1017/s0016756815001119" @default.
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