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Composition and sampling depth of olivine in carbonate-rich olivine lamproites of the Kaapvaal cratonNARA Subscribed
Olivine represents the main constituent (40–50 vol%) of carbonate-rich olivine lamproites (CROL) and their xenocrystic cores offer great potential for characterizing the sub-continental lithospheric mantle (SCLM). We present electron probe microanalysis (EPMA) and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) data for olivine cores and rims from 11 on-craton CROL localities from the Kaapvaal craton. O...
The diamond potential of kimberlites is generally determined using indicator minerals (i.e., xenocrysts), entrained by the parent magma while ascending through the sub-continental lithospheric mantle (SCLM). It is becoming increasingly apparent that olivine can also be used to understand mantle sampling depth, using the Al-in-olivine thermometer, and to constrain the extent of diamond-destructive metasomatism in the SCLM. To f...
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