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• W2890997054 abstract "The D’Entrecasteaux Islands of eastern Papua New Guinea (PNG) host the youngest known ultrahigh-pressure terrane on Earth and represent the only location where ultrahigh-pressure (UHP) rocks have been exhumed in an active rift. The PNG (U)HP rocks, consisting of Pliocene eclogites, garnet amphibolites and migmatitic gneisses, are exposed in five domal structures across the Islands. Zirconium-in-rutile thermometry records peak temperatures of ∼780°C from the eastern Oiatabu and nearby central Mailolo Domes, and hotter temperatures of ∼825–865°C within the western Goodenough Dome. Uranium–lead (U–Pb) and trace element zircon compositions from a suite of eclogite, host gneiss, felsic dikes and pegmatite from three domes document the rapid exhumation history of the PNG UHP terrane. High-spatial resolution laser-ablation split-stream inductively coupled plasma-mass spectrometry (LASS ICP-MS) analyses of select eclogite zircons exhibit no resolvable age zoning within single crystals. The same eclogite zircons, combined with separate zircons extracted from additional eclogite, host gneiss and felsic intrusions, were subsequently analysed by high-precision U–Pb chemical-abrasion isotope-dilution thermal ionization mass spectrometry and solution ICP-MS trace element analysis (TIMS-TEA). The results record discrete tectonic events across the three domes at sub-million year timescales: (1) (re)crystallization of host gneiss within the lower crust exposed in the eastern Oiatabu Dome from c.5·7–4·5 Ma; (2) initial retrogression and local decompression melting of eclogites from the Oiatabu and Mailolo Domes at c.4·6–4·3 Ma; (3) melt crystallization of weakly deformed felsic dikes of the Oiatabu Dome at c.3·0–2·9 Ma; and (4) retrogression and melt crystallization within eclogite–amphibolite-facies rocks in the western Goodenough Dome at c.2·9–2·6 Ma. In comparison to Zr-in-rutile peak temperature estimates, Ti-in-zircon temperatures >800°C may reflect increased temperatures during exhumation that resulted in partial melting of the eclogites. Inclusions of crystallized hydrous melt consisting of Na-rich plagioclase ± K-feldspar + quartz within eclogite zircons document this process. The elevated temperatures and the presence of the polyphase inclusions are the first documentation of partial melting of the (U)HP eclogites within PNG during initial retrogression from c.4·6–4·3 Ma. Overall, U–Pb zircon geochronology and geochemistry track both the timing of retrogressive overprinting within the lower-to-middle crust and final upper crustal emplacement over a relatively short span of ∼2 Myr during the rapid (≥2·3 cm/yr) exhumation of the youngest known (U)HP eclogites." @default.
• W2890997054 created "2018-09-27" @default.
• W2890997054 creator A5002379406 @default.
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• W2890997054 creator A5086387942 @default.
• W2890997054 date "2018-09-18" @default.
• W2890997054 modified "2023-10-13" @default.
• W2890997054 title "Using eclogite retrogression to track the rapid exhumation of the Pliocene Papua New Guinea UHP Terrane" @default.
• W2890997054 cites W1265931216 @default.
• W2890997054 cites W1481349996 @default.
• W2890997054 cites W1506819485 @default.
• W2890997054 cites W1527024826 @default.
• W2890997054 cites W1536496118 @default.
• W2890997054 cites W1536610234 @default.
• W2890997054 cites W1564613405 @default.
• W2890997054 cites W1589807587 @default.
• W2890997054 cites W1594745218 @default.
• W2890997054 cites W1595502742 @default.
• W2890997054 cites W1660706859 @default.
• W2890997054 cites W1829163844 @default.
• W2890997054 cites W1839278594 @default.
• W2890997054 cites W1898112109 @default.
• W2890997054 cites W1910016627 @default.
• W2890997054 cites W1925777036 @default.
• W2890997054 cites W1950684065 @default.
• W2890997054 cites W1967014906 @default.
• W2890997054 cites W1968410303 @default.
• W2890997054 cites W1969859799 @default.
• W2890997054 cites W1970381277 @default.
• W2890997054 cites W1973055268 @default.
• W2890997054 cites W1973844707 @default.
• W2890997054 cites W1974260748 @default.
• W2890997054 cites W1975384952 @default.
• W2890997054 cites W1976866988 @default.
• W2890997054 cites W1978340873 @default.
• W2890997054 cites W1978857480 @default.
• W2890997054 cites W1978958059 @default.
• W2890997054 cites W1981344517 @default.
• W2890997054 cites W1984351481 @default.
• W2890997054 cites W1984826053 @default.
• W2890997054 cites W1988979328 @default.
• W2890997054 cites W1990751086 @default.
• W2890997054 cites W1990917353 @default.
• W2890997054 cites W1991783128 @default.
• W2890997054 cites W1991869927 @default.
• W2890997054 cites W1991965761 @default.
• W2890997054 cites W1993912114 @default.
• W2890997054 cites W1995782535 @default.
• W2890997054 cites W1998440704 @default.
• W2890997054 cites W1998886247 @default.
• W2890997054 cites W1999496681 @default.
• W2890997054 cites W2001415035 @default.
• W2890997054 cites W2001964436 @default.
• W2890997054 cites W2002322258 @default.
• W2890997054 cites W2003365780 @default.
• W2890997054 cites W2005718053 @default.
• W2890997054 cites W2005913363 @default.
• W2890997054 cites W2006280751 @default.
• W2890997054 cites W2007307178 @default.
• W2890997054 cites W2008302995 @default.
• W2890997054 cites W2015778476 @default.
• W2890997054 cites W2019693008 @default.
• W2890997054 cites W2019793007 @default.
• W2890997054 cites W2020139762 @default.
• W2890997054 cites W2020316016 @default.
• W2890997054 cites W2020342712 @default.
• W2890997054 cites W2020631504 @default.
• W2890997054 cites W2022653241 @default.
• W2890997054 cites W2025481412 @default.
• W2890997054 cites W2029602159 @default.
• W2890997054 cites W2029963782 @default.
• W2890997054 cites W2031255348 @default.
• W2890997054 cites W2036174339 @default.
• W2890997054 cites W2036422851 @default.
• W2890997054 cites W2037221458 @default.
• W2890997054 cites W2042297882 @default.
• W2890997054 cites W2044219742 @default.
• W2890997054 cites W2046756109 @default.
• W2890997054 cites W2047230097 @default.
• W2890997054 cites W2048794400 @default.
• W2890997054 cites W2054314513 @default.
• W2890997054 cites W2054653182 @default.
• W2890997054 cites W2058249593 @default.
• W2890997054 cites W2060963469 @default.
• W2890997054 cites W2062474827 @default.
• W2890997054 cites W2063953857 @default.
• W2890997054 cites W2064739911 @default.
• W2890997054 cites W2066857664 @default.
• W2890997054 cites W2068705742 @default.
• W2890997054 cites W2069543343 @default.
• W2890997054 cites W2072107094 @default.
• W2890997054 cites W2072746426 @default.
• W2890997054 cites W2075222990 @default.
• W2890997054 cites W2077437893 @default.
• W2890997054 cites W2082009596 @default.
• W2890997054 cites W2090368987 @default.

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