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• W2890143845 endingPage "34" @default.
• W2890143845 startingPage "16" @default.
• W2890143845 abstract "Long-lived spatial geochemical zonation of the Tristan-Gough and Discovery hotspot tracks and temporal variations from EMI-type basement to HIMU-type late-stage volcanism at the Walvis Ridge and Shona hotspot tracks point to a complex evolution and multiple source areas for the South Atlantic hotspots. Here we report 40Ar/39Ar age and geochemical (major and trace element, Sr-Nd-Pb-Hf isotope) data for samples from 16 new sites on the Walvis Ridge. This aseismic ridge is the oldest submarine expression of the Tristan-Gough mantle plume and represents the initial reference locality of the EMI end member in the South Atlantic Ocean. The EMI-type lavas display an excellent age progressive trend of ∼31 mm/a along the entire Tristan-Gough hotspot track, indicating constant plate motion over a relatively stationary melt anomaly over the last ∼115 Ma. The Gough-type EMI composition of the Tristan-Gough hotspot track is the dominant composition of the >70 Ma part of the Walvis Ridge, the Etendeka and Parana flood basalts, and along the Gough sub-track, extending from DSDP Site 525A on the SW Walvis Ridge to Gough Island, whereas Tristan-type EMI dominates on the Tristan sub-track, extending from DSDP Sites 527 and 528 to Tristan da Cunha Island. Gough-type EMI is also the dominant composition of the northern Discovery and Shona hotspot tracks, suggesting that these hotspots tap a common source reservoir. The continuous EMI-type supply over ≥132 Ma, coupled with high 3He/4He (>10 RA), points to a deep-seated reservoir for this mantle material. The Tristan and Southern Discovery EMI-type flavors can be reproduced by mixing of the Gough-type component with (1) FOZO/PREMA to produce Tristan-type lavas, and (2) marine sediments or upper continental crust to generate the Southern Discovery-type composition. South Atlantic hotspots with EMI-type compositions overlie the margin (1% ∂Vs velocity contour) of the African Large Low Shear Velocity Province (LLSVP), which may promote the emergence of geochemical “zonation”. The St. Helena HIMU-type volcanism, however, is located above internal portions of the LLSVP, possibly reflecting a layered LLSVP." @default.
• W2890143845 created "2018-09-27" @default.
• W2890143845 creator A5011106285 @default.
• W2890143845 creator A5011152663 @default.
• W2890143845 creator A5021053411 @default.
• W2890143845 creator A5048206714 @default.
• W2890143845 creator A5062781095 @default.
• W2890143845 creator A5082258900 @default.
• W2890143845 date "2019-01-01" @default.
• W2890143845 modified "2023-10-15" @default.
• W2890143845 title "New age and geochemical data from the Walvis Ridge: The temporal and spatial diversity of South Atlantic intraplate volcanism and its possible origin" @default.
• W2890143845 cites W1506744787 @default.
• W2890143845 cites W1512699499 @default.
• W2890143845 cites W1519816591 @default.
• W2890143845 cites W1562979489 @default.
• W2890143845 cites W1591548555 @default.
• W2890143845 cites W1599895293 @default.
• W2890143845 cites W1610187950 @default.
• W2890143845 cites W1621537172 @default.
• W2890143845 cites W1623782396 @default.
• W2890143845 cites W1673865877 @default.
• W2890143845 cites W1801625845 @default.
• W2890143845 cites W1873013960 @default.
• W2890143845 cites W1914890451 @default.
• W2890143845 cites W1941456882 @default.
• W2890143845 cites W1964908056 @default.
• W2890143845 cites W1966917681 @default.
• W2890143845 cites W1967852550 @default.
• W2890143845 cites W1969245391 @default.
• W2890143845 cites W1969850611 @default.
• W2890143845 cites W1971788413 @default.
• W2890143845 cites W1974107814 @default.
• W2890143845 cites W1974463006 @default.
• W2890143845 cites W1974787630 @default.
• W2890143845 cites W1975722584 @default.
• W2890143845 cites W1976213158 @default.
• W2890143845 cites W1977743275 @default.
• W2890143845 cites W1977793670 @default.
• W2890143845 cites W1980364678 @default.
• W2890143845 cites W1981040638 @default.
• W2890143845 cites W1995720681 @default.
• W2890143845 cites W1995756718 @default.
• W2890143845 cites W1996444759 @default.
• W2890143845 cites W1997228875 @default.
• W2890143845 cites W2001426491 @default.
• W2890143845 cites W2001632595 @default.
• W2890143845 cites W2008350311 @default.
• W2890143845 cites W2009544440 @default.
• W2890143845 cites W2014842430 @default.
• W2890143845 cites W2015154867 @default.
• W2890143845 cites W2021828598 @default.
• W2890143845 cites W2023150618 @default.
• W2890143845 cites W2026818690 @default.
• W2890143845 cites W2033143626 @default.
• W2890143845 cites W2034667531 @default.
• W2890143845 cites W2036853755 @default.
• W2890143845 cites W2038296817 @default.
• W2890143845 cites W2039799126 @default.
• W2890143845 cites W2040815956 @default.
• W2890143845 cites W2041643163 @default.
• W2890143845 cites W2045620949 @default.
• W2890143845 cites W2047567126 @default.
• W2890143845 cites W2048542221 @default.
• W2890143845 cites W2049902162 @default.
• W2890143845 cites W2051581312 @default.
• W2890143845 cites W2051758022 @default.
• W2890143845 cites W2055812626 @default.
• W2890143845 cites W2063290440 @default.
• W2890143845 cites W2063777091 @default.
• W2890143845 cites W2066355721 @default.
• W2890143845 cites W2070937320 @default.
• W2890143845 cites W2071928947 @default.
• W2890143845 cites W2072419534 @default.
• W2890143845 cites W2073178791 @default.
• W2890143845 cites W2073519633 @default.
• W2890143845 cites W2073905341 @default.
• W2890143845 cites W2075627347 @default.
• W2890143845 cites W2083784240 @default.
• W2890143845 cites W2085876181 @default.
• W2890143845 cites W2087348707 @default.
• W2890143845 cites W2088715187 @default.
• W2890143845 cites W2092140298 @default.
• W2890143845 cites W2093159256 @default.
• W2890143845 cites W2106296941 @default.
• W2890143845 cites W2106912699 @default.
• W2890143845 cites W2111277048 @default.
• W2890143845 cites W2111577014 @default.
• W2890143845 cites W2112438962 @default.
• W2890143845 cites W2116394159 @default.
• W2890143845 cites W2119438235 @default.
• W2890143845 cites W2122773073 @default.
• W2890143845 cites W2124597070 @default.
• W2890143845 cites W2128452142 @default.
• W2890143845 cites W2130976294 @default.
• W2890143845 cites W2138356919 @default.
• W2890143845 cites W2140841001 @default.
• W2890143845 cites W2141858059 @default.
• W2890143845 cites W2143617201 @default.

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