FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2790283089> ?p ?o ?g. }

• W2790283089 endingPage "506" @default.
• W2790283089 startingPage "471" @default.
• W2790283089 abstract "The Central Zone of the Limpopo Belt in southern Africa is a classical example of a polymetamorphic terrane that experienced three metamorphic events at 3.22 Ga (M1), 2.66–2.61 Ga (M2) and 2.02 (M3). However, the geodynamic significance of these events is controversial as their P-T evolution was poorly constrained. We present new petrological and geochronological data for the M2 and M3 events. The Neoarchean M2 event is well-preserved in samples from a newly discovered enclave of supracrustal and magmatic rocks in the 2.612 Ga Bulai pluton that shielded the enclave against a Paleoproterozoic M3 overprint, which is dominant in rocks exposed outside the pluton. P-T pseudosection modelling for migmatitic Grt-Crd metapelites from the enclave and the rock sequence outside the pluton indicates an opposite metamorphic evolution, a counterclockwise P-T path for M2 but a clockwise path for M3. Spinel-quartz assemblages in the enclave metapelites record early heating to UHT conditions (ca. 930 °C, 5.5 kbar) at intermediate crustal levels. The peak-pressure M2-assemblage garnet-cordierite-sillimanite-K-feldspar-plagioclase-quartz ± rutile formed at ca. 860 °C and 7.5 kbar during a moderate pressure increase. Cordierite coronas around garnet record subsequent decompression. We interpret the counterclockwise P-T evolution during M2 to result from convergence of the Zimbabwe and Kaapvaal Cratons, which has led to subduction of oceanic lithosphere beneath the Zimbabwe Craton. Subsequent slab retreat has caused asthenosphere upwelling, thereby inducing delamination of the lithospheric mantle. Intrusion of hot asthenospheric material beneath the crust induced early UHT metamorphism at mid-crustal levels. The subsequent moderate pressure increase was related to the ensuing collision of the cratons. Post-peak decompression records incorporation of the enclave into the Bulai pluton melt and uplift in the ascending granitoid melt. The peak M3-assemblage garnet-cordierite-sillimanite-K-feldspar-rutile-plagioclase-quartz formed in metapelites occurring outside the pluton during near-UHT conditions (ca. 880 °C, 7.5 kbar). Cordierite coronas around garnet record subsequent decompression. New growth of garnet and sillimanite at the expense of cordierite documents late near-isobaric cooling to <700 °C. The resulting clockwise P-T path for M3 granulite-facies metamorphism is interpreted to record an intracontinental Paleoproterozoic transpressional orogeny within the consolidated Kaapvaal-Zimbabwe Craton, which was induced by far-field tectonic processes." @default.
• W2790283089 created "2018-03-29" @default.
• W2790283089 creator A5010342062 @default.
• W2790283089 creator A5039634984 @default.
• W2790283089 creator A5042538052 @default.
• W2790283089 creator A5044098887 @default.
• W2790283089 creator A5055130740 @default.
• W2790283089 creator A5064629858 @default.
• W2790283089 creator A5067100664 @default.
• W2790283089 creator A5069826985 @default.
• W2790283089 date "2018-06-01" @default.
• W2790283089 modified "2023-09-30" @default.
• W2790283089 title "Pressure-temperature evolution during two granulite-facies metamorphic events (2.62 and 2.02 Ga) in rocks from the Central Zone of the Limpopo Belt, South Africa" @default.
• W2790283089 cites W1545192450 @default.
• W2790283089 cites W1830358639 @default.
• W2790283089 cites W1868659645 @default.
• W2790283089 cites W1925687169 @default.
• W2790283089 cites W1953499253 @default.
• W2790283089 cites W1961025132 @default.
• W2790283089 cites W1963816302 @default.
• W2790283089 cites W1967474570 @default.
• W2790283089 cites W1970111722 @default.
• W2790283089 cites W1972423246 @default.
• W2790283089 cites W1972909865 @default.
• W2790283089 cites W1973480449 @default.
• W2790283089 cites W1974068117 @default.
• W2790283089 cites W1974131317 @default.
• W2790283089 cites W1976668523 @default.
• W2790283089 cites W1978567788 @default.
• W2790283089 cites W1978640446 @default.
• W2790283089 cites W1979118634 @default.
• W2790283089 cites W1979445082 @default.
• W2790283089 cites W1979831773 @default.
• W2790283089 cites W1981442519 @default.
• W2790283089 cites W1982388874 @default.
• W2790283089 cites W1984592043 @default.
• W2790283089 cites W1985048272 @default.
• W2790283089 cites W1986528051 @default.
• W2790283089 cites W1987500605 @default.
• W2790283089 cites W1993242552 @default.
• W2790283089 cites W1996425609 @default.
• W2790283089 cites W1999741844 @default.
• W2790283089 cites W2000326123 @default.
• W2790283089 cites W2002469616 @default.
• W2790283089 cites W2003363298 @default.
• W2790283089 cites W2004236451 @default.
• W2790283089 cites W2005125080 @default.
• W2790283089 cites W2006769450 @default.
• W2790283089 cites W2007360474 @default.
• W2790283089 cites W2008691821 @default.
• W2790283089 cites W2016697779 @default.
• W2790283089 cites W2019877001 @default.
• W2790283089 cites W2025081424 @default.
• W2790283089 cites W2025610915 @default.
• W2790283089 cites W2029013584 @default.
• W2790283089 cites W2032047288 @default.
• W2790283089 cites W2032275627 @default.
• W2790283089 cites W2034559901 @default.
• W2790283089 cites W2035931153 @default.
• W2790283089 cites W2040092205 @default.
• W2790283089 cites W2040259251 @default.
• W2790283089 cites W2040824030 @default.
• W2790283089 cites W2041289316 @default.
• W2790283089 cites W2045287269 @default.
• W2790283089 cites W2046141409 @default.
• W2790283089 cites W2049026235 @default.
• W2790283089 cites W2049145088 @default.
• W2790283089 cites W2051916584 @default.
• W2790283089 cites W2054493155 @default.
• W2790283089 cites W2057989474 @default.
• W2790283089 cites W2062101014 @default.
• W2790283089 cites W2063184832 @default.
• W2790283089 cites W2066780082 @default.
• W2790283089 cites W2066857664 @default.
• W2790283089 cites W2071731529 @default.
• W2790283089 cites W2072768988 @default.
• W2790283089 cites W2084757149 @default.
• W2790283089 cites W2087734262 @default.
• W2790283089 cites W2088272841 @default.
• W2790283089 cites W2088466117 @default.
• W2790283089 cites W2089294817 @default.
• W2790283089 cites W2090533162 @default.
• W2790283089 cites W2091782190 @default.
• W2790283089 cites W2091978513 @default.
• W2790283089 cites W2092044082 @default.
• W2790283089 cites W2092742668 @default.
• W2790283089 cites W2093806414 @default.
• W2790283089 cites W2094414093 @default.
• W2790283089 cites W2097477323 @default.
• W2790283089 cites W2100411277 @default.
• W2790283089 cites W2106529581 @default.
• W2790283089 cites W2107837030 @default.
• W2790283089 cites W2107882889 @default.
• W2790283089 cites W2111713504 @default.
• W2790283089 cites W2118183079 @default.
• W2790283089 cites W2121251626 @default.
• W2790283089 cites W2127889159 @default.
• W2790283089 cites W2128624170 @default.

• next