Ultrafresh salty kimberlite of the Udachnaya–East pipe (Yakutia, Russia): A petrological oddity or fortuitous discovery?

Kamenetsky, Vadim S.; Kamenetsky, Maya B.; Golovin, Alexander V.; Sharygin, Victor V.; Maas, Roland

doi:10.1016/j.lithos.2012.04.032

Cited by 98 publications

(70 citation statements)

References 52 publications

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“…(1) Whether the primary kimberlite is carbonatitic (Dawson 1971;Dawson and Hawthorne 1973;Russell et al 2012;Kamenetsky and Yaxley 2015;, a carbonated silicate melt (e.g., Nielsen and Sand 2008;Brey et al 2008), or a highly saline carbonatite (e.g., Kamenetsky et al 2012), and (2) the mechanism for generating the calcite-bearing kimberlites observed in the crust-all experimental evidence suggests that a primary melt formed from the melting of a peridotitic source must produce Mgrich carbonate, namely dolomite (e.g., Wyllie and Huang 1975;Dalton and Presnall 1998a).…”

Section: Introductionmentioning

confidence: 99%

The evolution of calcite-bearing kimberlites by melt-rock reaction: evidence from polymineralic inclusions within clinopyroxene and garnet megacrysts from Lac de Gras kimberlites, Canada

Bussweiler

Stone

Pearson

et al. 2016

Contrib Mineral Petrol

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inclusion trails surround the inclusions. In Cr-pyropes, the inclusions additionally contain Al-spinel, clinopyroxene, and dolomite. The major and trace element compositions of the inclusion phases are generally consistent with the early stages of kimberlite differentiation trends. Extensive chemical exchange between the host phases and the inclusions is indicated by enrichment of the inclusions in major components of the host crystals, such as Cr 2 O 3 and Al 2 O 3 . This chemical evidence, along with phase equilibria constraints, supports the proposal that the inclusions within Cr-diopside record the decarbonation reaction: dolomitic melt + diopside → forsterite + calcite + CO 2 , yielding the observed inclusion mineralogy and producing associated (CO 2 -rich) fluid inclusions. Our study of polymineralic inclusions in megacrysts provides clear mineralogical and chemical evidence for an origin of kimberlite that involves the reaction of high-pressure dolomitic melt with diopside-bearing mantle assemblages producing a lower-pressure melt that crystallizes a calcite-dominated assemblage in the crust.

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Section: Introductionmentioning

confidence: 99%

The evolution of calcite-bearing kimberlites by melt-rock reaction: evidence from polymineralic inclusions within clinopyroxene and garnet megacrysts from Lac de Gras kimberlites, Canada

Bussweiler

Stone

Pearson

et al. 2016

Contrib Mineral Petrol

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“…Compared to the host kimberlites [45] the trace-element patterns of microinclusions in coats are characterized by the enrichment of K and depletion of Ta, Nb, and Ti (Figure 7). All samples show the gentle negative slope of REE.…”

Section: Microinclusionsmentioning

confidence: 99%

Origin and Evolution of High-Mg Carbonatitic and Low-Mg Carbonatitic to Silicic High-Density Fluids in Coated Diamonds from Udachnaya Kimberlite Pipe

et al. 2019

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Microinclusions of high-density fluids (HDFs) were studied in coated diamonds from the Udachnaya kimberlite pipe (Siberian craton, Russia). The presence of C-centers in the coats testifies to their formation shortly before kimberlite eruption, whereas the cores have much longer mantle residence in chemically different mantle substrates, i.e., peridotite-type (P-type) and eclogite-type (E-type). The carbon isotope composition indicates an isotopically homogeneous carbon source for coats and a heterogeneous source for cores. Microinclusions in the coats belong to two groups: high-Mg carbonatitic and low-Mg carbonatitic to silicic. A relationship was found between high-Mg carbonatitic HDFs and peridotitic host rocks and between low-Mg carbonatitic to silicic and eclogites. The composition of high-Mg carbonatitic HDFs with a “planed” trace-element pattern can evolve to low-Mg carbonatitic to silicic during percolation through different mantle rocks. The compositional variations of microinclusions in the coats reflect this evolution.

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“…the Vulture, Kerimasi, Tinderet, and Catanda volcanoes, Guli pluton, Afrikanda, Gardiner, and Kovdor ultramafic‐alkaline complexes, and the Oka carbonatite complex . In addition, (Na,K) 2 Ca(CO 3 ) 2 and/or (Na,K) 2 Ca(CO 3 ,SO 4 ) 2 magmatic carbonates occur occasionally in kimberlite groundmass and chloride‐carbonate segregations and have been more often identified among daughter phases in melt inclusions in various minerals from kimberlites and their mantle xenoliths from different parts of the world . Moreover, Na–K–Ca carbonate has been found in super‐deep (lower mantle) diamonds from the Juina area, Brazil …”

Section: Introductionmentioning

confidence: 99%

Raman spectra of nyerereite, gregoryite, and synthetic pure Na₂Ca(CO₃)₂: diversity and application for the study micro inclusions

Golovin

Korsakov

Gavryushkin

et al. 2017

J Raman Spectroscopy

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In this study, we present Raman spectra of pure synthetic hydrothermal orthorhombic Na2Ca(CO3)2 carbonate together with naturally occurring orthorhombic nyerereite (Na,K)2Ca(CO3)2 and hexagonal gregoryite (Na,K,Cax)2‐x(CO3) from Oldoinyo Lengai natrocarbonatites (Tanzania) to show the diversity of spectra and permit the use of Raman spectroscopy to identify these minerals in small inclusions. Synthetic orthorhombic Na2Ca(CO3)2 carbonate has only one type of Raman spectrum, which is independent of the crystallographic orientation. The Raman spectra of nyerereite can be divided into three types, depending on intensity of symmetric stretching ν1(CO3)2− vibrations in region 1070–1090 cm−1. All these nyerereite types have identical chemical compositions; thus, the differences in Raman spectra are likely to be related to crystallographic orientations. Some nyerereite Raman spectra can be erroneously interpreted as gregoryite because of similarity in peak position of strong ν1(CO3)2− band. However, the diagnostic features of the gregoryite Raman spectrum can be summarized as follows: (1) presence of a symmetric peak attributed to ν1(CO3)2− vibrations at 1078 cm−1; (2) presence of one broad band ν4(CO3)2− with a peak position at 702–707 cm−1; (3) a stronger band ν1(SO4)2− that occurs at 1003–1006 cm−1 and the presence of additional weaker bands ν2(SO4)2− and ν4(SO4)2− at 460–462 and 630–635 cm−1; and (4) a ν1(PO4)3− band that appears at 952–954 cm−1. Incorporation of significant amounts of additional cations (up to 0.5 apfu) and particularly K (up to 0.4 apfu) in natural nyerereites leads to a change in the commensurately modulated structure of pure Na2Ca(CO3)2 (P21ca), which becomes an incommensurately modulated structure (less ordered) with space group Cmcm; and these changes are reflected in a reduction of the number of Raman bands in symmetric stretching ν1(CO3)2− and inplane bending ν4(CO3)2− vibration regions or even the complete absence of the Raman bands in antisymmetric stretching ν3(CO3)2− and 2*ν2(CO3)2− vibration regions compared with pure Na2Ca(CO3)2. Copyright © 2017 John Wiley & Sons, Ltd.

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Ultrafresh salty kimberlite of the Udachnaya–East pipe (Yakutia, Russia): A petrological oddity or fortuitous discovery?

Cited by 98 publications

References 52 publications

The evolution of calcite-bearing kimberlites by melt-rock reaction: evidence from polymineralic inclusions within clinopyroxene and garnet megacrysts from Lac de Gras kimberlites, Canada

The evolution of calcite-bearing kimberlites by melt-rock reaction: evidence from polymineralic inclusions within clinopyroxene and garnet megacrysts from Lac de Gras kimberlites, Canada

Origin and Evolution of High-Mg Carbonatitic and Low-Mg Carbonatitic to Silicic High-Density Fluids in Coated Diamonds from Udachnaya Kimberlite Pipe

Raman spectra of nyerereite, gregoryite, and synthetic pure Na₂Ca(CO₃)₂: diversity and application for the study micro inclusions

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Ultrafresh salty kimberlite of the Udachnaya–East pipe (Yakutia, Russia): A petrological oddity or fortuitous discovery?

Cited by 98 publications

References 52 publications

The evolution of calcite-bearing kimberlites by melt-rock reaction: evidence from polymineralic inclusions within clinopyroxene and garnet megacrysts from Lac de Gras kimberlites, Canada

The evolution of calcite-bearing kimberlites by melt-rock reaction: evidence from polymineralic inclusions within clinopyroxene and garnet megacrysts from Lac de Gras kimberlites, Canada

Origin and Evolution of High-Mg Carbonatitic and Low-Mg Carbonatitic to Silicic High-Density Fluids in Coated Diamonds from Udachnaya Kimberlite Pipe

Raman spectra of nyerereite, gregoryite, and synthetic pure Na2Ca(CO3)2: diversity and application for the study micro inclusions

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Raman spectra of nyerereite, gregoryite, and synthetic pure Na₂Ca(CO₃)₂: diversity and application for the study micro inclusions