Petrogenesis of Zr–Nb (REE) carbonatites from the Arbarastakh complex (Aldan Shield, Russia): Mineralogy and inclusion data

Prokopyev, Ilya; Doroshkevich, A. G.; Zhumadilova, D.V.; Старикова, А. Е.; Nugumanova, Ya. N.; Vladykin, N. V.

doi:10.1016/j.oregeorev.2021.104042

Cited by 21 publications

(14 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Arbarastakh complex has a concentric zonal structure. According to Glagolev et al [23], the main phases composing the complex are pyroxenites, currently classified as jacupirangitesbiotite-bearing mela-ijolite [25]. Numerous bodies of silicocarbonatites, calcite carbonatites, phoscorites, and alkali-feldspar syenites have cleavesplit contacts with the main phases.…”

Section: Geological Settingmentioning

confidence: 99%

“…Numerous bodies of silicocarbonatites, calcite carbonatites, phoscorites, and alkali-feldspar syenites have cleavesplit contacts with the main phases. The complex also contains dikes of ultrabasic lamprophyres [25]. The host rocks are represented by Archean granites and metamorphic rocks, which form a series of isoclinal folds steeply dipping towards to the northeast [23].…”

Section: Geological Settingmentioning

confidence: 99%

“…Dikes of ultrabasic lamprophyres are located in the central part of the complex and have thicknesses of 0.1 to 1 m. Feldspar syenite dikes are localized in the endocontact zone of the complex and have cleave contacts with jacupirangites and fenites (Figure 1b). A geological study of the complex showed the following geological sequence of rock formation: jacupirangites → carbonatites and phoscorites → dikes of feldspar syenites [25].…”

Section: Geological Settingmentioning

confidence: 99%

“…Green field-micas of accompanying silicate rocks, orange field-micas of carbonatites and phoscorites. Phl-phlogopite, TfPhl-teraferriphlogopite, TfAn-tetraferriannite, An-annite, Sidsiderophyllite, Eas-eastonite (data by [25], supplemented by the authors). Due to the absence of Ba in the graphs, the differentiation of phlogopites in the phlogopite-kinoshitalite and phlogopite-eastonite series is impossible in these graphs but is explained in the text.…”

Section: Petrogenetic Evolution Of Accessory Mineralsmentioning

confidence: 99%

“…The age of the rocks corresponds to the Neoproterozoic stage of alkaline carbonatite magmatism (725-630 Ma) in the southern part of the Siberian Craton, including the formation of ore-bearing alkaline-ultrabasic carbonatite complexes, such as Belaya Zima, Middle Zima, Tagna, Zhida, Ingili, Gornoe Ozero [24]. The results of the melt inclusions studies in minerals from the carbonatites and phoscorites of Arbarastakh indicate that the carbonatites were formed from an alkaline silicocarbonatite melt, while the phoscorites are the products of the differentiation of the carbonatitic melt [25].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Mineralogy of Phoscorites of the Arbarastakh Complex (Republic of Sakha, Yakutia, Russia)

et al. 2021

View full text Add to dashboard Cite

The Arbarastakh ultramafic carbonatite complex is located in the southwestern part of the Siberian Craton and contains ore-bearing carbonatites and phoscorites with Zr-Nb-REE mineralization. Based on the modal composition, textural features, and chemical compositions of minerals, the phoscorites from Arbarastakh can be subdivided into two groups: FOS 1 and FOS 2. FOS 1 contains the primary minerals olivine, magnetite with isomorphic Ti impurities, phlogopite replaced by tetraferriphlogopite along the rims, and apatite poorly enriched in REE. Baddeleyite predominates among the accessory minerals in FOS 1. Zirconolite enriched with REE and Nb and pyrochlore are found in smaller quantities. FOS 2 has a similar mineral composition but contains much less olivine, magnetite is enriched in Mg, and the phlogopite is enriched in Ba and Al. Of the accessory minerals, pyrochlore predominates and is enriched in Ta, Th, and U; baddeleyite is subordinate and enriched in Nb. Chemical and textural differences suggest that the phoscorites were formed by the sequential introduction of different portions of the melt. The melt that formed the FOS 1 was enriched in Zr and REE relative to the FOS 2 melt; the melt that formed the FOS 2 was enriched in Al, Ba, Nb, Ta, Th, U, and, to a lesser extent, Sr.

show abstract

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Petrogenetic Evolution Of Accessory Mineralsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mineralogy of Phoscorites of the Arbarastakh Complex (Republic of Sakha, Yakutia, Russia)

et al. 2021

View full text Add to dashboard Cite

show abstract

Metasomatic ijolite, glimmerite, silicocarbonatite, and antiskarn formation: carbonatite and silicate phase equilibria in the system Na2O–CaO–K2O–FeO–MgO–Al2O3–SiO2–H2O–O2–CO2

Anenburg,

Walters

2024

Contrib Mineral Petrol

View full text Add to dashboard Cite

Silicocarbonatites are carbonatite rocks containing > 20% silicate minerals. Their formation is not well understood due to low silica solubility in carbonatite melts and negligible amounts of silicate minerals on carbonatite melt cotectics at upper crustal conditions. We explore whether silicocarbonatites can be thought of as antiskarns: rocks formed by leaching of SiO2 from siliceous wall rocks by carbonatite melts, and its deposition as solid silicate minerals by reaction with chemical components already present in the carbonatite melt. Solid state thermodynamic modelling at 1–5 kbar and 500–800 °C predicts that calcite–dolomite–magnetite assemblages will transform to dolomite-free silicocarbonatites with an increase in silica contents. In sodic systems, the formation of aegirine and alkali amphiboles suppresses silica activity despite elevated silica contents. Therefore, dolomite remains stable, but Fe3+ is consumed, firstly from magnetite breakdown, and secondly by coupled Fe oxidation and reduction of CO2 to CO, CH4, and graphite, particularly at higher pressures. Despite a net increase in Fe3+/Fe2+, the system evolves to increasingly lower oxygen fugacity. In aluminous systems, nepheline indicates high temperatures whereas alkali feldspars form at lower temperatures. Modelling of potassic systems demonstrates stability of mostly phlogopite-rich biotites, leading to Fe2+ increase in all other carbonate and silicate phases. We find that perthites are expected in high pressures whereas two feldspars are more likely in lower pressures.Aspects of the clinopyroxene natural compositional trend (diopside to hedenbergite to aegirine) of carbonatite systems can be explained by silica contamination. Ferrous clinopyroxenes typically require low alumina and are predicted in potassic or low temperature sodic systems, primarily at mid to high pressures. Silica contamination permits the formation of silicocarbonatite-like assemblages in a way that is not limited by SiO2 solubility in carbonatite melts. Glimmerites and clinopyroxene-rich rocks (such as the ijolite series) that often occur around carbonatite rocks at the contact with silica-oversaturated wall rocks can be explained as the extreme end of silica contamination of carbonatite melts. Therefore, these clinopyroxenites and glimmerites can form solely via metasomatic processes without the presence of a silicate melt.

show abstract

Chemical evolution of major and minor minerals in rocks of the Arbarastakh complex (Aldan shield, Republic of Sakha, Yakutia)

Kruk,

Doroshkevich,

Prokopyev

et al. 2024

Geosystems and Geoenvironment

View full text Add to dashboard Cite

Petrogenesis of Zr–Nb (REE) carbonatites from the Arbarastakh complex (Aldan Shield, Russia): Mineralogy and inclusion data

Cited by 21 publications

References 63 publications

Mineralogy of Phoscorites of the Arbarastakh Complex (Republic of Sakha, Yakutia, Russia)

Mineralogy of Phoscorites of the Arbarastakh Complex (Republic of Sakha, Yakutia, Russia)

Metasomatic ijolite, glimmerite, silicocarbonatite, and antiskarn formation: carbonatite and silicate phase equilibria in the system Na2O–CaO–K2O–FeO–MgO–Al2O3–SiO2–H2O–O2–CO2

Chemical evolution of major and minor minerals in rocks of the Arbarastakh complex (Aldan shield, Republic of Sakha, Yakutia)

Contact Info

Product

Resources

About