Origin of salts and alkali carbonates in the Udachnaya East kimberlite: Insights from petrography of kimberlite phases and their carbonate and evaporite xenoliths

Kopylova, Maya G.; Gaudet, Matthew; Kostrovitsky, Sergey; Polozov, Alexander G.; Yakovlev, D. A.

doi:10.1016/j.jvolgeores.2016.07.003

Cited by 19 publications

(26 citation statements)

References 36 publications

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“…In this study we use the term kimberlite 'units' instead of 'phases' (see Kopylova et al, 2016). This is because a separate 'phase' of kimberlite magmatism requires:(i) different timing of formation; (ii) a clear boundary between the first and secondary kimberlite varieties.…”

Section: Megascopic and Macroscopic Study Of Udachnaya-east Kimberlite Unitsmentioning

confidence: 99%

“…S13). This same kimberlite was classified by Kopylova et al (2016) into two so-called "phases": olivine-rich pyroclastic kimberlite (PK) and magmaclastrich PK.…”

Section: Megascopic and Macroscopic Study Of Udachnaya-east Kimberlite Unitsmentioning

confidence: 99%

“…Six partially serpentinised samples (K16/05, K20-05, K28/05, K17/04, K25/04, K-U) were derived from depth intervals of 480 -520 m (below the SFUE) and 400 -420 m (roof of the SFUE) and five unserpentinised samples (UV-K1-15, K2-03, K24/04A, K24/04B, UV-K1-05) were sourced from a depth interval of 440 -500 m (within the SFUE; Table 1). The petrography of both serpentinised and unserpentinised varieties of the UE kimberlites have been extensively described in the literature (e.g., Marshintsev, 1986;Egorov et al,1991;Kharkiv et al, 1991;Kamenetsky et al, 2004Kamenetsky et al, , 2008Kamenetsky et al, , 2012Kamenetsky et al, , 2014Kopylova et al, 2013Kopylova et al, , 2016Kostrovitskiy et al, 2013;d'Eyrames et al, 2017;Kitayama et al, 2017).…”

Section: Petrographymentioning

confidence: 99%

“…These studies have consistently produced similar results, advocating the Si-poor and alkali-Cl-S (and to a lesser extent P-F)-bearing carbonaterich nature of kimberlite melts entrapped within inclusions. This alternative model for kimberlite petrogenesis has been heavily criticised in recent studies by Kopylova et al (2013Kopylova et al ( , 2016 and Kostrovitskiy et al (2013). These authors emphasise that the unique Na-Cl-S-enriched groundmass mineralogy of the Udachnaya-East pipe is not exceptional or representative of pristine kimberlite, but can be explained by:(i) contamination of the kimberlite magma by crustal material, and (ii) interaction with external Na-Ca-Cl brines that precipitate salts and carbonates.…”

Section: Introductionmentioning

confidence: 99%

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Was Crustal Contamination Involved in the Formation of the Serpentine-Free Udachnaya-East Kimberlite? New Insights into Parental Melts, Liquidus Assemblage and Effects of Alteration

Abersteiner

Kamenetsky

Golovin

et al. 2018

Journal of Petrology

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The petrologically unique Udachnaya-East kimberlite (Siberia, Russia) is characterised by unserpentinised and H 2 O-poor volcaniclastic and coherent units that contain fresh olivine, along with abundant alkali-rich carbonates, chlorides, sulphides and sulphates in the groundmass. These mineralogical and geochemical characteristics have led to two divergent models that advocate different origins. It has been suggested that the unserpentinised units from Udachnaya-East are representative of pristine unaltered kimberlite. Conversely, the alkali-chlorine-sulphur enrichment has been attributed to interactions with crustal materials and, or, post-emplacement contamination by brines. The mineralogical and geochemical features and the compositions of melt inclusions in unserpentinised and serpentinised Udachnaya-East kimberlite varieties are compared in this study. Both varieties of kimberlite have similar major, compatible and incompatible trace element concentrations and primitive mantle normalised trace element patterns, groundmass textures and silicate, oxide and sulphide mineral compositions. However, these two kimberlite varieties are distinguished by:(i) the presence of unaltered olivine, abundant Na-K-Cl-S-rich minerals (i.e. chlorides, Sbearing alkali-carbonates, sodalite) and the absence of H 2 O-rich phases (i.e. serpentine, iowaite (Mg 4 Fe 3+ (OH) 8 OCl•3(H 2 O)) in unserpentinised samples, and (ii) the absence of alkali-and chlorine-enriched phases in the groundmass and characteristic olivine alteration (i.e. replacement by serpentine and, or, iowaite) in serpentinised samples. In addition, melt inclusions hosted in olivine, monticellite, spinel and perovskite from unserpentinised and serpentinised kimberlite contain identical daughter phase assemblages that are dominated by alkali-carbonates, chlorides and sulphates/sulphides. This enrichment in alkalis, chlorine and sulphur in melt inclusions demonstrates that these elements were an intrinsic part of the parental magma. The paucity of alkali-carbonates and chlorides in the groundmass of serpentinised Udachnaya-East kimberlite is attributed to their instability and removal during

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Section: Megascopic and Macroscopic Study Of Udachnaya-east Kimberlite Unitsmentioning

confidence: 99%

“…S13). This same kimberlite was classified by Kopylova et al (2016) into two so-called "phases": olivine-rich pyroclastic kimberlite (PK) and magmaclastrich PK.…”

Section: Megascopic and Macroscopic Study Of Udachnaya-east Kimberlite Unitsmentioning

confidence: 99%

Section: Petrographymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Was Crustal Contamination Involved in the Formation of the Serpentine-Free Udachnaya-East Kimberlite? New Insights into Parental Melts, Liquidus Assemblage and Effects of Alteration

Abersteiner

Kamenetsky

Golovin

et al. 2018

Journal of Petrology

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“…The nature of chloride segregations in kimberlites is intensively debated, while a co-magmatic origin of chlorides is mostly suggested (Kamenetsky et al, 2014;Kitayama et al, 2017;D'Eyrames et al, 2017), the evaporitic source of chlorides (i.e. xenoliths) is also proposed (Grishina et al, 2014a(Grishina et al, , 2014bKopylova et al, 2016). Halite-magnetite rock was studied from core samples from the Korshunovsk Fe-ore deposit (Fig.…”

Section: Geological Backgroundmentioning

confidence: 99%

Identification of anhydrous CaCl2 and KCaCl3 in natural inclusions by Raman spectroscopy

et al. 2018

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Anhydrous chlorides-CaCl 2 , and KCaCl 3 (chlorocalcite) were identified as mineral inclusions in halite from the Siberian Large Igneous Province at the contact of magmatic intrusions and evaporates. Chlorocalcite was also found as daughter mineral in polyphase hypersaline inclusions. While Raman spectra of KCaCl 3 (chlorocalcite) in natural inclusions are similar to spectra of synthetic analogue, the Raman spectra of natural CaCl 2 do not correspond to the published Raman spectra of synthetic CaCl 2. Simulations of Raman spectra using ab initio density-functional theory (DFT) allowed us to calculate the spectra of individual polymorphs of CaCl 2 and to discriminate anhydrous CaCl 2 phases in natural inclusions and synthetic CaCl 2. In the spectrum of the Pbcn polymorph of CaCl 2 twelve different peaks could be identified at 74,

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Micro‐Raman study of cesanite (Ca₂Na₃ (OH)(SO₄)₃) in chloride segregations from Udachnaya‐East kimberlites

Grishina

Goryaĭnov

Oreshonkov

et al. 2021

J Raman Spectroscopy

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Cesanite (Ca2Na3(OH)(SO4)3), a rare mineral, has been found in a few places restricted to a geothermal field and caves. We report the new occurrence of cesanite in quite different geological site—within sulfate‐rich melt inclusions in chloride segregations from kimberlites of Udachnaya‐East pipe (Siberia). Two halite generations: сesanite free and сesanite‐bearing, were distinguished in concentrically zonal segregations according to the results of the mineral and sulfate melt inclusion study by micro‐Raman spectroscopy and SEM‐EDS. We have applied the Raman spectroscopy and first principles calculations to understand structural and vibrational properties of cesanite daughter mineral in polyphase sulfate inclusions. Polarized spectra provided additional information on the overlapped components of the spectral profile. The Raman spectra of cesanite in the range of OH stretching vibrations are reported for the first time. The study aims to clarify the source of the NaSCl‐enrichment in the Udachnaya‐East pipe, which is highly discussed.

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Origin of salts and alkali carbonates in the Udachnaya East kimberlite: Insights from petrography of kimberlite phases and their carbonate and evaporite xenoliths

Cited by 19 publications

References 36 publications

Was Crustal Contamination Involved in the Formation of the Serpentine-Free Udachnaya-East Kimberlite? New Insights into Parental Melts, Liquidus Assemblage and Effects of Alteration

Was Crustal Contamination Involved in the Formation of the Serpentine-Free Udachnaya-East Kimberlite? New Insights into Parental Melts, Liquidus Assemblage and Effects of Alteration

Identification of anhydrous CaCl2 and KCaCl3 in natural inclusions by Raman spectroscopy

Micro‐Raman study of cesanite (Ca₂Na₃ (OH)(SO₄)₃) in chloride segregations from Udachnaya‐East kimberlites

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Origin of salts and alkali carbonates in the Udachnaya East kimberlite: Insights from petrography of kimberlite phases and their carbonate and evaporite xenoliths

Cited by 19 publications

References 36 publications

Was Crustal Contamination Involved in the Formation of the Serpentine-Free Udachnaya-East Kimberlite? New Insights into Parental Melts, Liquidus Assemblage and Effects of Alteration

Was Crustal Contamination Involved in the Formation of the Serpentine-Free Udachnaya-East Kimberlite? New Insights into Parental Melts, Liquidus Assemblage and Effects of Alteration

Identification of anhydrous CaCl2 and KCaCl3 in natural inclusions by Raman spectroscopy

Micro‐Raman study of cesanite (Ca2Na3 (OH)(SO4)3) in chloride segregations from Udachnaya‐East kimberlites

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Micro‐Raman study of cesanite (Ca₂Na₃ (OH)(SO₄)₃) in chloride segregations from Udachnaya‐East kimberlites