Diamond-bearing kimberlite fields of the Siberian Craton and the Early Precambrian geodynamics

Moralev, V. M.; Glukhovsky, M. Z.

doi:10.1016/s0169-1368(00)00011-1

Cited by 10 publications

(2 citation statements)

References 31 publications

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“…250 Ma Siberian Traps (Komarov and Ilupin, 1990;Kinny et al, 1997). According to Moralev and Glukhovsky (2000), approximately 15% of the total number of investigated kimberlites from the Siberian craton are diamondiferous. The perovskites that have been analyzed during our study were separated from kimberlite samples collected from both diamondiferous (e.g., Alakit, Upper Muna, and Daldyn) and barren (e.g., Ary-Mastah, Staraya Rechka, and Kuoika) kimberlite fields across northeastern Siberia.…”

Section: Yakutian Kimberlite Provincementioning

confidence: 99%

Repeated kimberlite magmatism beneath Yakutia and its relationship to Siberian flood volcanism: Insights from in situ U–Pb and Sr–Nd perovskite isotope analysis

Sun

Liu

Tappe

et al. 2014

Earth and Planetary Science Letters

145

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Section: Yakutian Kimberlite Provincementioning

confidence: 99%

Repeated kimberlite magmatism beneath Yakutia and its relationship to Siberian flood volcanism: Insights from in situ U–Pb and Sr–Nd perovskite isotope analysis

Sun

Liu

Tappe

et al. 2014

Earth and Planetary Science Letters

145

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“…This field relates to the early Triassic stage of kimberlitic magmatism of the Siberian platform as well as most kimberlites in the northern part of the Siberian craton , including the regions of Anabar shield and Prianabarie (Brakhfogel, 1984;Kinny et al, 1997;Griffin et al, 1999a,b;Griffin et al, 2005;Rosen et al, 2005Rosen et al, , 2006Kostrovitsky et al, 2007;Smelov and Zaitsev, 2013). The exceptions are some Devonian kimberlites in Starorechenskoe, Toluopskoe and Ukukite fields and late Jurassic kimberlites like the Obnazhennaya pipe common in Kuoyka (Taylor et al, 2003) and some northern kimberlite fields (Moralev and Glukhovsky, 2000;Zaitsev and Smelov, 2010). Mesozoic kimberlites in Siberia are of low diamond grade but numerous diamond placers in the northern part of Siberian craton (Afanasiev et al, 2011) suggest undiscovered sources.…”

Section: Introductionmentioning

confidence: 99%

Comparison of mantle lithosphere beneath early Triassic kimberlite fields in Siberian craton reconstructed from deep-seated xenocrysts

Ashchepkov

Kuligin

Vladykin

et al. 2016

Geoscience Frontiers

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a b s t r a c tMantle xenocrysts from early Triassic kimberlite pipes from Kharamai, Ary-Mastakh and Kuranakh fields in the Anabar shield of Siberia revealing similar compositional trends were studied to estimate the superplume influence on the subcratonic lithosphere mantle (SCLM). Pressure-temperature (PT) reconstructions using monomineral thermobarometry for 5 phases show division of the SCLM beneath the Kharamai field into 6 units: pyroxenitic Fe-rich (1e2 GPa) and Mg-rich (2e3 GPa) layers; middle with two levels of Gar-Sp pyroxenites at w3 and 4e5 GPa; Gar-duniteeharzburgites w4.5e6.5 GPa subjected to Ilm-Px vein metasomatism; and a Mg-rich dunite lower part. In the Anabar shield (Ary-Mastakh, Dyuken and Kuranakh fields) mantle lithosphere is composed of three large units divided into two parts: upper part with amphiboles and phlogopite; two levels of pyroxenites and eclogites at 3 and 4 GPa, and a lower part composed of refertilized dunites. Diagrams showing P-Fe # Gar clusters for garnets and omphacites illustrate the differences between SCLM of these localities. Differences of Triassic SCLM from Devonian SCLM are in simple layering; abundance of Na-Cr-amphiboles and metasomatism in the upper SCLM part, thick pyroxenite-eclogite layer and lower part depletion, heated from SCLM base to 5.0 GPa.Kharamai mantle clinopyroxenes represent three geochemical types: (1) harzburgitic with inclined linear REE, HFSE troughs and elevated Th, U; (2) lherzolitic or pyroxenitic with round TRE patterns and decreasing incompatible elements; (3) eclogitic with Eu troughs, Pb peak and high LILE content. Calculated parental melts for garnets with humped REE patterns suggest dissolution of former Cpx and depression means Cpx and garnets extraction. Clinopyroxenes from Ary-Mastakh fields show less inclined REE patterns with HMREE troughs and an increase of incompatible elements. Clinopyroxenes from Kuranakh field show flatter spoon-like REE patterns and peaks in Ba, U, Pb and Sr, similar to those in ophiolitic harzburgites. The PT diagrams for the mantle sections show high temperature gradients in the uppermost SCLM accompanied by an increase of P-Fe # Ol upward and slightly reduced thickness of the mantle keel of the Siberian craton, resulting from the influence of the PermianeTriassic superplume, but with no signs of delamination.Ó 2015, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

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Zone of Anomalous Mantle

Davies

2013

Proceedings of 10th International Kimberlite Conference

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Diamond-bearing kimberlite fields of the Siberian Craton and the Early Precambrian geodynamics

Cited by 10 publications

References 31 publications

Repeated kimberlite magmatism beneath Yakutia and its relationship to Siberian flood volcanism: Insights from in situ U–Pb and Sr–Nd perovskite isotope analysis

Repeated kimberlite magmatism beneath Yakutia and its relationship to Siberian flood volcanism: Insights from in situ U–Pb and Sr–Nd perovskite isotope analysis

Comparison of mantle lithosphere beneath early Triassic kimberlite fields in Siberian craton reconstructed from deep-seated xenocrysts

Zone of Anomalous Mantle

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