Dated eclogitic diamond growth zones reveal variable recycling of crustal carbon through time

Application of 1013 ohm Faraday cup current amplifiers for boron isotopic analyses by solution mode and laser ablation multicollector inductively coupled plasma mass spectrometry

“…The use of 10 13 Ω amplifier technology (Thermo Fisher Scientific (Bremen) GmbH, Bremen, Germany) for multi‐collector mass spectrometry measurements was first described by Koornneef et al Subsequently, 10 13 Ω amplifier technology has been applied to e.g. Nd, Pb/Pb and U‐Pb isotope ratio measurements by TIMS, for Pb/Pb by LA‐MC‐ICP‐MS and for 180 Ta measurements by MC‐ICP‐MS . The technology is well suited for the measurement of limited sample amounts, minor isotopes and analytical baselines.…”

“Non-invasive” portable laser ablation sampling of art and archaeological materials with subsequent Sr–Nd isotope analysis by TIMS using 1013 Ω amplifiers

“…Previous studies have shown that such an approach can successfully discriminate different sample populations. 22,23 The total procedural blanks were 78.4 pg for Sr and 4.6 pg for Nd and represent the accumulated effect of contamination during sampling, lter dissolution, geochemical procedures and loading. The relatively high and variable Sr blanks represent the limiting factor in the successful application of the pLA sampling technique to small Sr samples.…”

Episodic diamond growth beneath the Kaapvaal Craton at Jwaneng Mine, Botswana

“…Hence, it is vital to establish the timing of diamond forming events: e.g., by analysing individual sulphide inclusions for Re-Os isochron ages (Pearson et al 1998;Wiggers de Vries et al 2013). Initial attempts have also been made to date individual silicate diamond inclusions using the Sm-Nd isochron method e.g., at the Orapa kimberlite cluster in Botswana and at Finsch, Kimberley and Venetia diamond mines, South Africa (Koornneef et al 2017;Smith et al 1991;Timmerman et al 2017). These data indicate multiple temporally-distinct diamond forming events at the same diamond mine.…”