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• W3000245380 endingPage "105610" @default.
• W3000245380 startingPage "105610" @default.
• W3000245380 abstract "We present an integrated study combining detailed field, geochronological and geochemical data of a Neoproterozoic intra-oceanic arc systems exposed in the Pan-African belt of the Moroccan Anti-Atlas. The arc rock units exposed in Bou Azzer and Sirwa inliers consist of a tectonic patchwork of back-arc ophiolitic sequences to the north thrusted onto accreted arc complexes to the south. Arc complexes are composed of amphibolite, granodioritic and granitic gneisses intruded by various undeformed hydrous ultramafic (hornblendite), mafic (hornblende-gabbro, diorite) and felsic (granodiorite, tonalite, granite) arc lithologies. We show that these complexes are remnants of a long-lived (120 Myr) Neoproterozoic oceanic arc, punctuated by three successive magmatic episodes (760–730 Ma, 710–690 Ma, 660–640 Ma respectively) interspersed with periods of magmatic quiescence. The typical geochemical arc signature and positive ƐNdt values for the igneous rocks emplaced during each magmatic episode (medians at +7.1, +5.4 and +5.7, from older to younger) attest that their parental magmas derived from a depleted mantle source without substantial assimilation by the WAC older crustal basement. Trace-element geochemistry, i.e. Sr/Y, La/Yb, of intermediate to felsic arc rocks produced during each magmatic pulse suggests that the arc crust was thickened (>30–35 km) over a short time period between the first and second magmatic episodes (730–710 Ma) which coincides with an important regional shortening event. Soft-docking of the oceanic arc on a buoyant transitional margin is invoked to explain tectonic inversion in overriding plate, leading to shortening and related thickening of the arc crust. Concomitant magmatic shutdown resulting from a reorganization of subduction dynamics (i.e. change in slab geometry, flip in subduction polarity). A non-tectonic critical thickening of the arc crust is invoked to explain the second magmatic shutdown (680–660 Ma), by freezing the subarc mantle influx. This lull period is followed by a third magmatic episode which is likely triggered by delamination of the dense lower crust and reactivation of subarc mantle flow. This is supported by the bimodal chemical signature of evolved magmatic products, suggesting two distinct sources partial melts from the foundered lower crust and new magmatic products which differentiated from a post-delamination thinned crust." @default.
• W3000245380 created "2020-01-23" @default.
• W3000245380 creator A5019341612 @default.
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• W3000245380 date "2020-04-01" @default.
• W3000245380 modified "2023-10-13" @default.
• W3000245380 title "Episodic magmatism during the growth of a Neoproterozoic oceanic arc (Anti-Atlas, Morocco)" @default.
• W3000245380 cites W1522457544 @default.
• W3000245380 cites W1636995053 @default.
• W3000245380 cites W1705777835 @default.
• W3000245380 cites W1828106521 @default.
• W3000245380 cites W1914110685 @default.
• W3000245380 cites W1965131236 @default.
• W3000245380 cites W1967274442 @default.
• W3000245380 cites W1970807111 @default.
• W3000245380 cites W1974070030 @default.
• W3000245380 cites W1977782002 @default.
• W3000245380 cites W1979472025 @default.
• W3000245380 cites W1979982652 @default.
• W3000245380 cites W1981068316 @default.
• W3000245380 cites W1984685629 @default.
• W3000245380 cites W1985583508 @default.
• W3000245380 cites W1987734384 @default.
• W3000245380 cites W1991334434 @default.
• W3000245380 cites W1994048706 @default.
• W3000245380 cites W2000174130 @default.
• W3000245380 cites W2000845802 @default.
• W3000245380 cites W2007800468 @default.
• W3000245380 cites W2012368976 @default.
• W3000245380 cites W2012386939 @default.
• W3000245380 cites W2013659467 @default.
• W3000245380 cites W2015673067 @default.
• W3000245380 cites W2016565685 @default.
• W3000245380 cites W2018236251 @default.
• W3000245380 cites W2023477252 @default.
• W3000245380 cites W2028217178 @default.
• W3000245380 cites W2029014434 @default.
• W3000245380 cites W2037143412 @default.
• W3000245380 cites W2037248050 @default.
• W3000245380 cites W2037828475 @default.
• W3000245380 cites W2042835543 @default.
• W3000245380 cites W2049887920 @default.
• W3000245380 cites W2064531217 @default.
• W3000245380 cites W2066718630 @default.
• W3000245380 cites W2067890950 @default.
• W3000245380 cites W2069330001 @default.
• W3000245380 cites W2069647204 @default.
• W3000245380 cites W2075085181 @default.
• W3000245380 cites W2078370790 @default.
• W3000245380 cites W2083137977 @default.
• W3000245380 cites W2085064498 @default.
• W3000245380 cites W2086433479 @default.
• W3000245380 cites W2097126717 @default.
• W3000245380 cites W2098068539 @default.
• W3000245380 cites W2101782242 @default.
• W3000245380 cites W2103643797 @default.
• W3000245380 cites W2103999221 @default.
• W3000245380 cites W2105173625 @default.
• W3000245380 cites W2105265476 @default.
• W3000245380 cites W2117577007 @default.
• W3000245380 cites W2117783357 @default.
• W3000245380 cites W2118197212 @default.
• W3000245380 cites W2118746821 @default.
• W3000245380 cites W2119388646 @default.
• W3000245380 cites W2120031516 @default.
• W3000245380 cites W2120707785 @default.
• W3000245380 cites W2127199454 @default.
• W3000245380 cites W2135909516 @default.
• W3000245380 cites W2138522501 @default.
• W3000245380 cites W2142782632 @default.
• W3000245380 cites W2152848429 @default.
• W3000245380 cites W2155743604 @default.
• W3000245380 cites W2157099954 @default.
• W3000245380 cites W2161029067 @default.
• W3000245380 cites W2162900173 @default.
• W3000245380 cites W2164111973 @default.
• W3000245380 cites W2165967937 @default.
• W3000245380 cites W2165982417 @default.
• W3000245380 cites W2169408449 @default.
• W3000245380 cites W2274475702 @default.
• W3000245380 cites W2291506047 @default.
• W3000245380 cites W2313755883 @default.
• W3000245380 cites W2317394938 @default.
• W3000245380 cites W2320075728 @default.
• W3000245380 cites W2329741551 @default.
• W3000245380 cites W2371445061 @default.
• W3000245380 cites W2424453843 @default.
• W3000245380 cites W2469623596 @default.
• W3000245380 cites W2472168361 @default.
• W3000245380 cites W2567957170 @default.
• W3000245380 cites W2621115583 @default.

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