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• W4283722257 endingPage "4215" @default.
• W4283722257 startingPage "4194" @default.
• W4283722257 abstract "The Limpopo Complex in southern Africa is a classic example of Neoarchean collisional orogens with a Palaeoproterozoic thermal overprint. We report new petrological, pressure–temperature ( P – T ), and geochronological data of sapphirine‐bearing Mg–Al‐rich and pelitic granulites from a metasupracrustal unit (the Beit Bridge Complex [BBC]) in the eastern part of Botswana to constrain its P – T –time evolution. Textural observations and phase equilibria modelling of the peak mineral assemblage of Mg–Al‐rich granulites (K‐feldspar + orthopyroxene [Opx2; Al 2 O 3 up to 8.8 wt.%] + sillimanite [Sil2] + quartz + rutile + biotite [Bt2] + inferred melt) in the NCKFMASHTO system recorded a peak metamorphic condition of >930°C and > 10.3 kbar. A pelitic granulite recorded consistent P – T conditions of 960–980°C and > 10.3 kbar, indicating high‐pressure (HP) and ultrahigh‐temperature (UHT) metamorphism for the BBC in Botswana. Post‐peak retrograde conditions were obtained based on the stability of sapphirine + cordierite symplectite assemblage in the Mg–Al‐rich rocks (820–860°C and 6.4–7.0 kbar) and orthopyroxene [Opx3] + cordierite symplectite assemblage in the pelitic granulite (830–930°C and 4.3–5.8 kbar), indicating near‐isothermal decompression after the peak HP–UHT metamorphism along a clockwise P – T path. Similar HP–UHT metamorphism followed by a near‐isothermal decompression along a clockwise P – T path was reported from different regions of the BBC in South Africa and Zimbabwe ( P > 14 kbar and ~1,000°C based on the stability fields of magnesian staurolite and sapphirine + quartz assemblage), although the peak P – T condition is slightly lower in Botswana. Monazite grains with patchy zoning show isochron ages of 2,115 ± 77 Ma for Th‐poor domains, and 2,058 ± 40 Ma and 2,033 ± 34 Ma for Th‐rich domains. Similar ages were obtained from zircon U–Pb geochronology as 2,232–2,135 Ma and 2,010 ± 19 Ma (Th/U = 0.05–0.26). The younger ages (2.0 Ga) probably indicate the timing of near‐peak high‐grade event, while the older ages might indicate a thermal event during the prograde heating stage. The P – T conditions and zircon/monazite ages suggest Palaeoproterozoic long‐lived metamorphism associated with intracontinental transpressional tectonics related to Palaeoproterozoic orogenic events around the united Zimbabwe–Kaapvaal Craton." @default.
• W4283722257 created "2022-07-01" @default.
• W4283722257 creator A5025016604 @default.
• W4283722257 creator A5048238669 @default.
• W4283722257 creator A5069350652 @default.
• W4283722257 date "2022-06-30" @default.
• W4283722257 modified "2023-10-14" @default.
• W4283722257 title "Petrology and geochronology of sapphirine‐bearing granulites from the Limpopo Complex in eastern Botswana: Implications for Palaeoproterozoic long‐lived high‐pressure/ultrahigh‐temperature metamorphism and rapid exhumation" @default.
• W4283722257 cites W1503780069 @default.
• W4283722257 cites W1576370002 @default.
• W4283722257 cites W1830358639 @default.
• W4283722257 cites W1892759018 @default.
• W4283722257 cites W1963816302 @default.
• W4283722257 cites W1965876483 @default.
• W4283722257 cites W1967005613 @default.
• W4283722257 cites W1967474570 @default.
• W4283722257 cites W1970434351 @default.
• W4283722257 cites W1971513400 @default.
• W4283722257 cites W1972342233 @default.
• W4283722257 cites W1972909865 @default.
• W4283722257 cites W1974449101 @default.
• W4283722257 cites W1976668523 @default.
• W4283722257 cites W1979445082 @default.
• W4283722257 cites W1982388874 @default.
• W4283722257 cites W1984592043 @default.
• W4283722257 cites W1986528051 @default.
• W4283722257 cites W1987500605 @default.
• W4283722257 cites W1993242552 @default.
• W4283722257 cites W1995150562 @default.
• W4283722257 cites W1997266178 @default.
• W4283722257 cites W1997842666 @default.
• W4283722257 cites W2006769450 @default.
• W4283722257 cites W2007105153 @default.
• W4283722257 cites W2008691821 @default.
• W4283722257 cites W2009251618 @default.
• W4283722257 cites W2016681679 @default.
• W4283722257 cites W2018490520 @default.
• W4283722257 cites W2022211437 @default.
• W4283722257 cites W2025610915 @default.
• W4283722257 cites W2032047288 @default.
• W4283722257 cites W2032275627 @default.
• W4283722257 cites W2034559901 @default.
• W4283722257 cites W2035045796 @default.
• W4283722257 cites W2040824030 @default.
• W4283722257 cites W2041289316 @default.
• W4283722257 cites W2052699027 @default.
• W4283722257 cites W2055343428 @default.
• W4283722257 cites W2057989474 @default.
• W4283722257 cites W2062235768 @default.
• W4283722257 cites W2063050426 @default.
• W4283722257 cites W2063387328 @default.
• W4283722257 cites W2070535313 @default.
• W4283722257 cites W2073369132 @default.
• W4283722257 cites W2084757149 @default.
• W4283722257 cites W2087611505 @default.
• W4283722257 cites W2087734262 @default.
• W4283722257 cites W2088348719 @default.
• W4283722257 cites W2090451911 @default.
• W4283722257 cites W2094414093 @default.
• W4283722257 cites W2100411277 @default.
• W4283722257 cites W2103522682 @default.
• W4283722257 cites W2104961574 @default.
• W4283722257 cites W2105755619 @default.
• W4283722257 cites W2107882889 @default.
• W4283722257 cites W2111713504 @default.
• W4283722257 cites W2114826806 @default.
• W4283722257 cites W2118183079 @default.
• W4283722257 cites W2123292886 @default.
• W4283722257 cites W2125691712 @default.
• W4283722257 cites W2125853800 @default.
• W4283722257 cites W2127889159 @default.
• W4283722257 cites W2133940745 @default.
• W4283722257 cites W2138718878 @default.
• W4283722257 cites W2139507891 @default.
• W4283722257 cites W2143566906 @default.
• W4283722257 cites W2145604970 @default.
• W4283722257 cites W2145726800 @default.
• W4283722257 cites W2149526524 @default.
• W4283722257 cites W2151276387 @default.
• W4283722257 cites W2151941994 @default.
• W4283722257 cites W2161178599 @default.
• W4283722257 cites W2167398392 @default.
• W4283722257 cites W2314268432 @default.
• W4283722257 cites W2336067846 @default.
• W4283722257 cites W2341617842 @default.
• W4283722257 cites W2346309974 @default.
• W4283722257 cites W2437665724 @default.
• W4283722257 cites W2470769260 @default.
• W4283722257 cites W2559891143 @default.
• W4283722257 cites W2790283089 @default.
• W4283722257 cites W2790739196 @default.
• W4283722257 cites W2888720059 @default.
• W4283722257 cites W2910823363 @default.
• W4283722257 cites W2912737802 @default.
• W4283722257 cites W2986821316 @default.
• W4283722257 cites W2990953827 @default.
• W4283722257 cites W3213498246 @default.
• W4283722257 cites W4206697655 @default.

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