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- W3080974150 abstract "Final fragmentation of Rodinia occurred during the Ediacaran Period as Amazonia, Baltica and Laurentia drifted apart to form the Iapetus Ocean. Accompanying rift-related mafic dyke swarms of the Central Iapetus Magmatic Province (CIMP) were emplaced between 0.62 and 0.55 Ga, which are preserved in Laurentia and Baltica, whereas no coeval mafic rocks are known from Amazonia. First evidence for the CIMP extending into Oaxaquia (Rodinia-type basement of Mexico) was reported as tholeiitic dykes that intruded the Novillo gneiss, NE Mexico, at 619 ± 9 Ma. In Chiapas, SE Mexico, amphibolite dykes that are chemically similar to the Novillo dykes intruded anorthosite and gneiss. In this paper, a new dating approach to obtain mafic dyke intrusion ages is presented by targeting contact metamorphic zircon with the UPb method, employing Secondary Ion Mass Spectrometry. Zircon that crystallized in anorthosite at intrusive contacts to mafic dykes and at temperatures exceeding 700 °C (Ti-in-zircon thermometry) yields ages between 615 ± 7 Ma and 608 ± 12 Ma, reflecting the time of dyke intrusion. Zircon chemical and isotopic (Hf, O) characteristics suggest a diachronous sequence of metamorphic processes involving Zr release from FeTi oxides, breakdown and recrystallization of other phases, and fluid-mitigated reactions during Ordovician metamorphism. Zircon δ18O values of granulites from Oaxaquia range from +6.2‰ to +9.8‰, whereas Tonian (~0.92 Ga) metamorphic zircon from SE Chiapas yielded low δ18O values from +2.0‰ to +2.8‰ that are explained by the reactivation of major tectonic boundaries during Tonian gravitational collapse. The observations increase the known extent of the CIMP in Mexico, suggesting that a Neoproterozoic superplume was still active during the Early Ediacaran producing a Large Igneous Province that extended over Amazonia, Baltica and Laurentia. The results further suggest that Oaxaquia at the northern edge of Amazonia formed the conjugate margin of Baltica during rifting." @default.
- W3080974150 created "2020-09-01" @default.
- W3080974150 creator A5002863439 @default.
- W3080974150 creator A5003036879 @default.
- W3080974150 creator A5030081327 @default.
- W3080974150 creator A5030394446 @default.
- W3080974150 creator A5034878312 @default.
- W3080974150 date "2020-12-01" @default.
- W3080974150 modified "2023-09-24" @default.
- W3080974150 title "Neoproterozoic extension and the Central Iapetus Magmatic Province in southern Mexico – New U-Pb ages, Hf-O isotopes and trace element data of zircon from the Chiapas Massif Complex" @default.
- W3080974150 cites W1627783692 @default.
- W3080974150 cites W1964519101 @default.
- W3080974150 cites W1969755548 @default.
- W3080974150 cites W1970884480 @default.
- W3080974150 cites W1977050940 @default.
- W3080974150 cites W1979883233 @default.
- W3080974150 cites W1982739504 @default.
- W3080974150 cites W1985630284 @default.
- W3080974150 cites W1987341816 @default.
- W3080974150 cites W1997018906 @default.
- W3080974150 cites W1999202095 @default.
- W3080974150 cites W2000403740 @default.
- W3080974150 cites W2001784147 @default.
- W3080974150 cites W2002933535 @default.
- W3080974150 cites W2005188787 @default.
- W3080974150 cites W2007044127 @default.
- W3080974150 cites W2008072085 @default.
- W3080974150 cites W2009285376 @default.
- W3080974150 cites W2010581269 @default.
- W3080974150 cites W2012188344 @default.
- W3080974150 cites W2012863359 @default.
- W3080974150 cites W2014224100 @default.
- W3080974150 cites W2015726434 @default.
- W3080974150 cites W2018598378 @default.
- W3080974150 cites W2019425874 @default.
- W3080974150 cites W2020748972 @default.
- W3080974150 cites W2021221536 @default.
- W3080974150 cites W2023066279 @default.
- W3080974150 cites W2024005605 @default.
- W3080974150 cites W2024436619 @default.
- W3080974150 cites W2025324534 @default.
- W3080974150 cites W2029013584 @default.
- W3080974150 cites W2030257243 @default.
- W3080974150 cites W2030785128 @default.
- W3080974150 cites W2031395330 @default.
- W3080974150 cites W2032531352 @default.
- W3080974150 cites W2035024660 @default.
- W3080974150 cites W2036163350 @default.
- W3080974150 cites W2036312048 @default.
- W3080974150 cites W2036733808 @default.
- W3080974150 cites W2038246868 @default.
- W3080974150 cites W2039872199 @default.
- W3080974150 cites W2041139278 @default.
- W3080974150 cites W2045682438 @default.
- W3080974150 cites W2046388680 @default.
- W3080974150 cites W2048240400 @default.
- W3080974150 cites W2048857036 @default.
- W3080974150 cites W2049858804 @default.
- W3080974150 cites W2051796852 @default.
- W3080974150 cites W2054653182 @default.
- W3080974150 cites W2055926968 @default.
- W3080974150 cites W2056058187 @default.
- W3080974150 cites W2057094789 @default.
- W3080974150 cites W2059356468 @default.
- W3080974150 cites W2062895547 @default.
- W3080974150 cites W2064010779 @default.
- W3080974150 cites W2065157015 @default.
- W3080974150 cites W2068705742 @default.
- W3080974150 cites W2071420843 @default.
- W3080974150 cites W2074201082 @default.
- W3080974150 cites W2074487541 @default.
- W3080974150 cites W2074530210 @default.
- W3080974150 cites W2076965374 @default.
- W3080974150 cites W2086694968 @default.
- W3080974150 cites W2086935665 @default.
- W3080974150 cites W2088326429 @default.
- W3080974150 cites W2088377459 @default.
- W3080974150 cites W2099166336 @default.
- W3080974150 cites W2099869352 @default.
- W3080974150 cites W2100634462 @default.
- W3080974150 cites W2116197973 @default.
- W3080974150 cites W2117665200 @default.
- W3080974150 cites W2118148922 @default.
- W3080974150 cites W2120718537 @default.
- W3080974150 cites W2120852101 @default.
- W3080974150 cites W2121529544 @default.
- W3080974150 cites W2124056992 @default.
- W3080974150 cites W2131582746 @default.
- W3080974150 cites W2133940745 @default.
- W3080974150 cites W2142319922 @default.
- W3080974150 cites W2146373633 @default.
- W3080974150 cites W2149018574 @default.
- W3080974150 cites W2154362075 @default.
- W3080974150 cites W2158125318 @default.
- W3080974150 cites W2159161961 @default.
- W3080974150 cites W2171647512 @default.
- W3080974150 cites W2171662275 @default.
- W3080974150 cites W2212925423 @default.