2007
DOI: 10.1016/j.rgg.2007.02.011
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Isotope-geochemical systematics of kimberlites and related rocks from the Siberian Platform

Abstract: Using the ICP-MS method we have studied the isotope systematics of Sr and Nd as well as trace element composition of a representative collection of kimberlites and related rocks from the Siberian Platform. The summarized literature and our own data suggest that the kimberlites developed within the platform can be divided into several petrochemical and geochemical types, whose origin is related to different mantle sources. The petrochemical classification of kimberlites is based on persistent differences of the… Show more

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Cited by 65 publications
(69 citation statements)
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“…Three Sr isotope analyses of UV31k-05 perovskite by solution-mode average 0.70305±7 (2σ, age-corrected), similar to laser ablation MC-ICPMS results for 20 individual perovskite grains (average 0.70312±5, 2σ, age-corrected). These 87 Sr/ 86 Sr i ratios are lower than those for the host kimberlite (0.7043-0.7049, Kostrovitsky et al, 2007;Maas et al, 2005;Pearson et al, 1995), although results for acid-leached kimberlite (0.7034-0.7037, Maas et al, 2005) provide a closer match. Such offsets between perovskite and host kimberlite were also noticed elsewhere (Paton et al, 2007), and probably reflect minor disturbance of bulk rock Rb-Sr systems.…”
Section: Radiogenic Isotope Compositionmentioning
confidence: 58%
“…Three Sr isotope analyses of UV31k-05 perovskite by solution-mode average 0.70305±7 (2σ, age-corrected), similar to laser ablation MC-ICPMS results for 20 individual perovskite grains (average 0.70312±5, 2σ, age-corrected). These 87 Sr/ 86 Sr i ratios are lower than those for the host kimberlite (0.7043-0.7049, Kostrovitsky et al, 2007;Maas et al, 2005;Pearson et al, 1995), although results for acid-leached kimberlite (0.7034-0.7037, Maas et al, 2005) provide a closer match. Such offsets between perovskite and host kimberlite were also noticed elsewhere (Paton et al, 2007), and probably reflect minor disturbance of bulk rock Rb-Sr systems.…”
Section: Radiogenic Isotope Compositionmentioning
confidence: 58%
“…The latest brines were generated from a buried bittern of the evaporite basin, which underwent metamorphism in the water-rock system during the subsequent geochemical evolution of the basin (Alexeev et al, 2007). Regional scale brecciation and silicification occurs throughout the Vendian-Cambrian evaporitic rocks and is primarily attributed to ancient weathering as opposed to local processes such as pipe formation, which could account for only a small proportion of the observed alteration (Pisarchik et al, 1975).…”
Section: Accepted Manuscriptmentioning
confidence: 99%
“…In the latter province, there is mounting evidence for the evolution of carbonate-rich residual magmas from kimberlitic Yakutian kimberlites and from published worldwide kimberlite occurrences: South Africa (Donnelly et al, 2012;Wu et al, 2013b); North China (Yang et al, 2009);Greenland (Tape et al, 2011, 2012; North America (Heaman, 1989;Wu et al, 2010) and India (Chalapathi Rao et al, 2013). Bulk kimberlite Sr-Nd isotope data from the Yakutian kimberlites are from Kostrovitsky et al (1999), Agashev et al (2000), Bogatikov et al (2004), Carlson et al (2006), Kostrovitsky et al (2007). parent melts.…”
Section: Timing Of Repeated Kimberlite Magmatism Beneath Yakutiamentioning
confidence: 99%
“…7, we are comparing the newly obtained Sr and Nd isotope compositions of perovskites from the Yakutian kimberlite province with available Sr-Nd isotope data from bulk Siberian kimberlites (Kostrovitsky et al, 1999;Bogatikov et al, 2004;Carlson et al, 2006;Kostrovitsky et al, 2007). In general, the Sr-Nd isotope data of the kimberlitic perovskites show much less variation (initial 87 Sr/ 86 Sr of 0.70282-0.70375; 143 Nd/ 144 Nd of 0.51229-0.51271; ε Nd of +1.8 to +5.4) than the equivalent data for the bulk kimberlites (initial 87 Sr/ 86 Sr of 0.70318-0.70641; 143 Nd/ 144 Nd of 0.51048-0.51270; ε Nd of −4.2 to +7), although the difference is less pronounced for the Nd isotope compositions.…”
Section: Kimberlite Magma Source Evolution Beneath Siberiamentioning
confidence: 99%