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ONLINE RESOURCE FIGURES

ONLINE RESOURCE FIGURES Nickel-rich metasomatism of the lithospheric mantle by pre-kimberlitic alkali-S-Cl-rich C-O-H fluids    Andrea Giuliani*, Vadim S. Kamenetsky, Mark A. Kendrick, David Phillips and Karsten Goemann submitted to: Contribution to Mineralogy and Petrology

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ONLINE RESOURCE FIGURES

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  1. ONLINE RESOURCE FIGURES Nickel-rich metasomatism of the lithospheric mantle by pre-kimberlitic alkali-S-Cl-rich C-O-H fluids    Andrea Giuliani*, Vadim S. Kamenetsky, Mark A. Kendrick, David Phillips and Karsten Goemann submitted to: Contribution to Mineralogy and Petrology * corresponding author School of Earth Sciences, The University of Melbourne email: a.giuliani@student.unimelb.edu.au 1 cm Figure 1EA Figure 1EA. Photograph showing an off-cut of sample XM1/422

  2. Figure 2EA a e c c Ol Spl Spl Ni Hz Srp Dps Opx Hz Ni-Ol d Ni Hz Ol Ni-Ol Spl Ni Figure 2EA. SEM back-scattered electron (BSE) photos of minerals in xenolith XM1/422. a-b) Different types of spinel (Spl) + diopside (Dps) + orthopyroxene (Opx) symplectites after garnet or Al-Cr-Ca-rich orthopyroxene; c) Ni mineralisation with heazlewoodite (Hz) in the core, surrounded by granoblastic domains of dominant Ni-Fe-rich olivine (Ni-Ol); d-e) blebs of native nickel interstitial to coarse-grained porphyroblastic olivine (Ol); in e) native nickel associated with fine-grained Ni-Fe-rich olivine. Ol porphyroblastic olivine; Srp serpentine

  3. Figure 3 EA a b Srp e Dps Spl Ol Phl Ol Mgt Spl Ni Hz Ni Srp c Ni Hz Dps Ol Hz d Srp f Ol core Ni Hz Spl Srp Ni Figure 3EA. FESEM BSE (a-d,f) and secondary electron (SE; f) images of minerals in spinel + pyroxenes symplectites and Ni-rich assemblages of xenolith XM1/422. a) 700× view of altered margin of spinel + pyroxenes symplectite with formation of Ni-poor phlogopite (Phl) and re-crystallisation of spinel (Spl) to grains with abundant inclusions and variable BSE response (altered Ni-poor spinel); b) large, composite Ni-rich assemblage; c) discontinuous heazlewoodite vein (white box) connecting different Ni-rich assemblages; d) grain of native nickel (Ni) marginally replaced by heazlewoodite (Hz); e) magnetite (Mgt) + heazlewoodite (Hz) intergrowths replacing the margins of native Ni; f) 4000× view of native nickel included in porphyroblastic olivine (Ol; see Fig.3f). Dps diopside; Srp serpentine Ni Ol rim

  4. Figure 3EA, continue g Ni Ni-Ol Ni-Spl Ol h i Ni-Ol Cpx2 Cpx1 Hz Ni-Ol j Figure 3EA, continue. FESEM BSE (g,h,j) and SE (i) images of minerals in Ni-rich assemblages of xenolith XM1/422. g) Granoblastic domain of abundant Ni-Fe-rich olivine (Ni-Ol) in contact with a grain of native nickel; h) compositional variability of Ni-Fe-rich clinopyroxene (Cpx1 and Cpx2) included in Ni-Fe-rich olivine; i) heazlewoodite (Hz) inclusion in Ni-Fe-rich olivine; j) inclusions of heazlewoodite, Ni-Fe-Ti-rich spinel (Ni-Fe-Ti Spl), apatite and carbonates (not shown) in Ni-Fe-rich olivine. Ol porphyroblastic olivine Ni-Ol Hz Srp Ni-Fe-Ti Spl

  5. Figure 4EA bradleyite + apatite Ni-Fe sulphide phlogopite phl dolomite ± bradleyite spinel zemkorite phlogopite ± halite Figure 4EA. Image and EDS spectra of inclusions in altered Ni-poor spinel associated with Ni-poor phlogopite (phl) from the margin of an altered spinel + pyroxenes symplectite (on the vertical axis of EDS spectra is the relative peak intensity of each element). The inclusions host several alkali and volatile-rich minerals including phlogopite, dolomite, apatite, bradleyite, alkali-carbonates (e.g. zemkorite), chlorides (e.g. halite) and Ni-Fe sulphide. Note the variable BSE response of spinel due to variations in Cr, Al, Fe, Mg and Ti contents.

  6. Figure 5EA rel. peak intensity Ni-Co-rich pentlandite rel. peak intensity native copper Hz rel. peak intensity Cu sulphide Figure 5EA. Image and EDS spectra of inclusions of Ni-Co-rich pentlandite, native copper and Cu sulphide in heazlewoodite (Hz).

  7. Figure 6EA rel. peak intensity rel. peak intensity calcite apatite rel. peak intensity heazlewoodite rel. peak intensity alkali-carbonate rel. peak intensity Ni-olivine (host) Figure 6EA. Image and EDS spectra of polymineralic inclusion in Ni-Fe-rich olivine. The inclusion host grains of heazlewoodite, apatite, calcite and alkali-carbonate.

  8. Figure 7EA rel. peak intensity rel. peak intensity devitrified glass inclusion spinel (host) rel. peak intensity glass inclusion rel. peak intensity glass inclusion Figure 7EA. Image and EDS spectra of Si-P-Ca-K-Na-Cl glass inclusions in Ni-Fe-rich relict spinel. Note that the glass inclusions display negative shape of the spinel host.

  9. Figure 8EA a Hz Ol core Hz 7 Hz Ol core 2 b 6 Hz Ni Ol core Ni 4 Ol core Ni Figure 8EA. Positions of chemical profiles in porphyroblastic olivines adjacent to heazlewoodite (a) and native nickel (b).

  10. Figure 9EA Ni S 100 μm Ni-Ol Hz Ol Dps Mg Fe Si Ca C P Figure 9EA. x-ray elemental map of large heazlewoodite (Hz) grain and Ni-Fe olivine (Ni-Ol)-rich granoblastic domain in a Ni-rich assemblage. Note the occurrence of Ca-rich carbonate and apatite in the Ni-rich assemblage. Ol porphyroblastic olivine; Dps diopside

  11. Figure 10EA Ol Ni Ni-Ol Spl Ni S 100 μm Fe Si Mg Cr Ca P Figure 10EA. x-ray elemental map of a Ni-rich assemblage that includes a large grain of native nickel (Ni). Nickel-Fe-rich olivine (Ni-Ol) adjacent to native nickel is preferentially enriched in Fe compared to Ni. Note the abundance of relict spinel (Spl), and the occurrence of apatite. Ol porphyroblastic olivine

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