Cr2O3 Content Research Articles

A star-shaped POSS-containing polymer for cleaner leather processing.

A water-based silsesquioxane (POSS)-containing polymer, POSS-PAA, was synthesized by using octavinyl-POSS (V-POSS) and acrylic acid (AA) via interfacial polymerization. The TEM of POSS-PAA showed that the polymer formed a core-shell structure in aqueous solution and was well-dispersed. The star-shaped POSS-PAA and linear PAA were both tanned with 3.5% chromium tanning agent, and leather hide was tanned with 3.5% chromium tanning agent as a control. The results showed that the shrinkage temperature of wet-blue leather treated by POSS-PAA was increased by 3.5 °C than that of the control. The thickening rate of the POSS-PAA treated wet-blue leather samples was increased by 21% and 96% than the linear PAA-treated leather and the control leather, respectively. The EDS results suggested that the POSS-PAA pre-treated leather had a higher chromium content than the others, and the chromium distribution from the leather flesh side to the grain side was uniform. Moreover, the Cr2O3 content in both the POSS-PAA and the PAA pre-treated tanning waste water was reduced by about 50%, compared to the control waste. The COD and BOD of the POSS-PAA pre-tanning waste were decreased compared to the others. Therefore, POSS-PAA appeared to be promising for promoting the development of cleaner leather production.

Phase evolution with temperature in chromium-containing refractory castables used for waste melting furnaces and Cr(VI) leachability

Highly corrosion resistant Cr2O3 based refractory linings are required for waste melting furnaces due to the complex melting environment. However, these linings are susceptible to Cr(VI) generation during service. In this study Cr2O3 based castables were prepared by varying the Cr2O3 content (4, 8 & 12 wt%) and heated in the temperature range of 500–1500 °C in the air atmosphere to simulate the service conditions. The formations of various phases were studied using XRD and SEM-EDS. The Cr(VI)-containing phase, CaCrO4 formed at 500–700 °C, while Ca4Al6CrO16 formed in the intermediate temperature regime (900–1300 °C). The Cr(III) containing (Al,Cr)2O3 solid solution phase started to form at 1100 °C which predominantly formed at 1500 °C. The oxidation states of chromium in solid state transferred in the order Cr(III)→Cr(VI)→Cr(III) with the increase in temperature. The specimens treated at 500–1300 °C contain ~ 474–5646 mg/kg of Cr(VI) whereas specimens at 1500 °C exhibit only ~ 63–69 mg/kg of Cr(VI).

Phase formation and microstructure evolution in mullite ceramics synthesized from mechanochemically activated oxide powders doped with Cr2O3

In this study, we investigated the influence of Cr2O3 on phase formation and microstructure evolution in mullite ceramics. We also explored the mechanochemical effects of high-energy milling with stainless steel and tungsten carbide. X-ray diffraction and scanning electronic microscopy analyses showed that the introduction of Cr2O3 had a negative effect on the formation of mullite. As the Cr2O3 content increased from 5 mol% to 20 mol%, the initial formation temperature for mullite increased from 1300 °C to 1500 °C. The negative effect of Cr2O3 on the formation and growth of mullite can be mitigated by mechanochemically activating the precursor mixture via high-energy ball milling.

Facile one-step synthesis of TiO2 microrods surface modified with Cr2O3 nanoparticles for acetone sensor applications

The paper demonstrated cost-effective one-step hydrothermal process to synthesize TiO2 microrods modified with Cr2O3 nanoparticles. The crystal structure, microstructure and chemical composition of the obtained materials were characterized by XRD, SEM, TEM and EDS analysis. Subsequently, for gas sensor tests the sensors were fabricated onto a ceramic tube having a designed pair of Au electrodes with four Pt wires. The results indicate that the sensors based on the optimal content of Cr2O3 nanoparticles modified TiO2 microrods possess excellent gas-sensing performance to acetone. Specifically, the sensor based on optimal 3% Cr2O3 modified TiO2 microrods exhibited high response (15), fast response/recovery time (5/28 s), outstanding selectivity (against 100 ppm ethanol, methanol and formaldehyde) and good stability (1–40 days) towards 100 ppm acetone at 300 °C. Relying on the analysis, we infer that performance can be controlled by varying the Cr2O3 contents. A plausible sensing mechanism is also discussed to explain the reasons for the enhanced acetone sensing with Cr2O3–TiO2 heterostructures.

Preparation of Superconcentrate and Chromium Powder from Chromite Ore

Non-traditional metallurgical technology of comprehensive processing of Sevan chromite (with a 43–46% Cr2O3 content) is developed allowing chromium extraction from local chromite in the form of more expensive chromium powder. The process of increasing the reactivity of chromite concentrate (with a Cr2O3 content of 53%) as a result of thermal and mechanochemical treatment both in the presence and in the absence of chlorides has been investigated for this purpose. It is found that in both cases, with heating and with grinding in the presence of chlorides, selective chlorination occurs similar to high-temperature chlorination. The resultant iron and magnesium chlorides are removed after washing, and the remaining residue after drying is a super-concentrate with a Cr2O3 content of 74.12% in the case of firing and 77.23% in the case of mechanochemical activation, with a low iron and magnesium content. The possibility of obtaining powder chromium with low content of iron and magnesium by processing the super-concentrate obtained by extra-furnace aluminothermic reduction is demonstrated.

Chromium-bearing clays in altered ophiolitic rocks from Crommyonia (Soussaki) volcanic area, Attica, Greece

Abstract Chromium-bearing clays occurring at Crommyonia (Soussaki), Greece, are studied in detail. In this area Mesozoic ultramafic ophiolitic rocks were affected by a Pliocene volcanic activity continuing, nowadays, with intense post-volcanic phenomena. Particularly, the Cr-bearing clays were formed at the margins of the ophiolite into highly altered serpentinized peridotite. These clays were studied by means of x-ray diffraction (powder-XRD), microscopic (SEM-EDS), nanoscopic (TEM-EDS/STEM-HAADF), and spectroscopic (FTIR, XANES) techniques. The XRD and SEM-EDS studies confirmed smectites and halloysites, with average Cr2O3 content ca 6.2 wt% and 4.3 wt%, respectively. The mineralogy and mineral-chemistry of the above unique Cr-clays was also confirmed by TEM-EDS/STEM-HAADF measurements. Subsequent FT-IR investigation indicated the relation of chromium ions with structural hydroxyls whereas a XANES study showed the presence of only Cr(III) in both phases and the absence of Cr(VI). According to the above data, Cr(III) ions should occupy octahedral sites in the structure of the studied clays. Geochemical data indicated high enrichment in Cr, and also in As, Se, Ni, V, Sc, Tl, when compared to Upper Continental Crust (UCC), and in Cr when compared to average global peridotite and primitive mantle. The formation of Cr-bearing clays is attributed to additional alteration of serpentinized peridotite minerals (such as Cr-spinels), due to hydrothermal fluids leaching different elements from the volcanic, sedimentary, and ophiolitic rocks of the area.

Mineral inclusions in diamonds from Karowe Mine, Botswana: super-deep sources for super-sized diamonds?

Mineral inclusions in diamonds play a critical role in constraining the relationship between diamonds and mantle lithologies. Here we report the first major and trace element study of mineral inclusions in diamonds from the Karowe Mine in north-east Botswana, along the western edge of the Zimbabwe Craton. From a total of 107 diamonds, 134 silicate, 15 oxide, and 22 sulphide inclusions were recovered. The results reveal that 53% of Karowe inclusion-bearing diamonds derived from eclogitic sources, 44% are peridotitic, 2% have a sublithospheric origin, and 1% are websteritic. The dominant eclogitic diamond substrates sampled at Karowe are compositionally heterogeneous, as reflected in wide ranges in the CaO contents (4–16 wt%) of garnets and the Mg# (69–92) and jadeite contents (14–48 mol%) of clinopyroxenes. Calculated bulk rock REEN patterns indicate that both shallow and deep levels of the subducted slab(s) were sampled, including cumulate-like protoliths. Peridotitic garnet compositions largely derive from harzburgite/dunite substrates (~90%), with almost half the garnets having CaO contents <1.8 wt%, consistent with pyroxene-free (dunitic) sources. The highly depleted character of the peridotitic diamond substrates is further documented by the high mean and median Mg# (93.1) of olivine inclusions. One low-Ca garnet records a very high Cr2O3 content (14.7 wt%), implying that highly depleted cratonic lithosphere at the time of diamond formation extended to at least 220 km depth. Inclusion geothermobarometry indicates that the formation of peridotitic diamonds occurred along a 39–40 mW/m2 model geotherm. A sublithospheric inclusion suite is established by three eclogitic garnets containing a majorite component, a feature so far unique within the Orapa cluster. These low- and high-Ca majoritic garnets follow pyroxenitic and eclogitic trends of majoritic substitution, respectively. The origin of the majorite-bearing diamonds is estimated to be between 330 to 420 km depth, straddling the asthenosphere–transition zone boundary. This new observation of superdeep mineral inclusions in Karowe diamonds is consistent with a sublithospheric origin for the exceptionally large diamonds from this mine.

Immobilization, enrichment and recycling of Cr(VI) from wastewater using a red mud/carbon material to produce the valuable chromite (FeCr2O4)

It is a long-term goal to develop an inexpensive, eco-friendly, and effective approach for the purification of wastewater containing heavy metal elements such as Cr(VI). In this study, a red mud (RM)/carbon material with dispersed nano zero-valent iron (nZVI) is fabricated to collect, immobilize, enrich, and recycle Cr(VI) from wastewater by repeatedly using the spent sample after carbothermal regeneration. The regenerated RM/carbon sample maintains an excellent removal efficiency of Cr(VI), and the collected Cr species can be firmly immobilized and gradually accumulated through forming highly stable chromite (FeCr2O4) with the assistance of carbothermal treatment. A detailed study of structure–function relationships reveals that Cr(VI) in wastewater is first reduced to Cr(III) by nZVI, and is then collected on RM/carbon in the form of Cr-Fe hydroxide species, which is converted to a stable FeCr2O4 phase immobilized on the regenerated RM/carbon by carbothermal treatment. Moreover, the repeated use/regeneration process facilitates the gradual growth, separation, and exposure of nZVI particles on the external surface of the RM/carbon, which improves its reaction activity with H+ and Cr(VI). The elevated activity of nZVI as well as the high stability of the accumulated FeCr2O4 account for the excellent cycle efficiency of Cr(VI) removal. Nearly all of the nZVI (97.8%) in RM/carbon can be utilized to produce FeCr2O4 with more than 45 wt% Cr2O3 content in the final calcined ash, which can be recycled as a valuable substitute for natural chromite ore in the steel industry with no secondary pollution. The demonstrated superiority of the material and process offer promising technological, economic and environmental benefits for the simultaneous utilization of chromium wastewater and RM solid wastes.

Grain refinement and non-ohmic properties in (Co, Ta)-doped SnO2 ceramics by Cr2O3 additions and the in situ formation of CoCr2O4

In this investigation, the microstructure and current–voltage properties of (Co, Ta)-doped SnO2 ceramics were found to depend on Cr2O3 additions. SnO2–Co3O4–Ta2O5 ceramics with additions of 0, 0.05, 0.1, 1 and 2 mol% Cr2O3 were sintered at 1350 °C under an oxidizing atmosphere and characterized microstructurally and electrically. Characterization by XRD and SEM shows that for samples with 0–1.0 mol% Cr2O3, the microstructure consists of single-phase SnO2 grains, while for the sample with the highest Cr2O3 content, the CoCr2O4 spinel phase is present in SnO2 microstructure. Moreover, reduced grain size distribution breadth and average grain size are observed in the SnO2 microstructure with 2 mol% Cr2O3. Results suggest that nonlinearity coefficient (α) is not as sensitive as electric field at fixed current density (EB) to Cr2O3 concentration changes.

Structural, Vibrational, and Magnetic Properties of MoS2/Cr2O3 Composites Synthesized by the Solid-State Technique

(1− x) Cr2O3/x MoS2 (x = 0.25, 0.5, 0.75) were synthesized using the powder solid-state route. The structural, morphological, vibrational, and magnetic properties of the as-prepared MoS2/Cr2O3 samples with different Cr2O3 contents have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy, Raman spectroscopy, and vibrating sample magnetometry (VSM), respectively. The X-ray diffraction results show the presence of the parent compounds (molybdenum disulfide (MoS2) and chromium oxide (Cr2O3)) in addition to a secondary phase corresponding to chromium molybdenite Cr2Mo3O12. Raman and IR spectra were recorded, and the observed modes were analyzed and assigned to different normal modes of vibration. Magnetic characterizations revealed that all the series MoS2/Cr2O3 composites possess paramagnetic characteristics both at room temperature and at 30 K. Further, the maximum of magnetization increased with the increase of Cr2O3 content.

Remediation of lime-free roasting chromite ore processing residue (COPR) by water leaching and pyrolysis process

ABSTRACTLime-free roasting process, instead of high lime roasting process and less lime roasting process, has become the dominant method producing chromate salt all over the world. Remediation process and utilization treatment of chromite ore processing residue (COPR) is an environmental issue which is not solved completely. Based on the characteristics of industrial lime-free COPR, a two-step treatment procedure including water leaching and biomass pyrolysis was proposed in this study. The results indicated that the main components of the COPR were (Fe, Mg) (Cr, Fe)2O4 and MgCr2O4, and the contents of Cr2O3 and Cr (VI) in untreated COPR were 12.2% and 1130 mg/kg, respectively. After water leaching, the Cr (VI) content reduced to 312 mg/kg. The removal rate was 72.3%. Pyrolysis parameters, including heating temperature, sawdust ratio, heating time, were systematically studied and the optimal experimental values were 500°C, 20%, and 25 min. The content of Cr (VI) in the final treated COPR was 3.7 mg/kg, which could be further utilized as resource material.

Effects of the Cr2O3 Content on the Viscosity of CaO-SiO2-10 Pct Al2O3-Cr2O3 Quaternary Slag

The present study experimentally investigates the effect of Cr2O3 on the viscosity of molten slags. The viscosities of CaO-SiO2-10 pct Al2O3-Cr2O3 quaternary slags with two different binary basicities (R, basic slag with R = 1.2 and acidic slag with R = 0.8) were measured by the rotating cylindrical method from 1813 K to 1953 K (1540 °C to 1680 °C). The results showed that the viscosity of both types of slag decreased as the Cr2O3 content increased, but the viscosity of acidic slags exhibited a greater decrease. The slags showed good Newtonian behavior at such high temperatures. Cr2O3 could act as a network modifier to simplify the Si-O-Si tetrahedral structure, as verified by the Raman spectral analysis, which was consistent with the decreasing trend of viscosity. The activation energy of viscous flow decreased slightly with increasing Cr2O3, but increasing the basicity seemed to be more effective in decreasing the viscosity than adding Cr2O3.

Thermobarometry of Whangarei volcanic field lavas, New Zealand: Constraints on plumbing systems of small monogenetic basalt volcanoes

The intra-plate, basaltic Whangarei volcanic field (WVF) is a little-studied cluster of Quaternary monogenetic volcanoes in northern New Zealand. Clinopyroxene-melt equilibria provides an insight to the ascent and storage of the magmas that is not evident from whole-rock-scale geochemistry. Basalts from two of the younger volcanoes contain a population of equilibrium and disequilibrium clinopyroxene phenocrysts. Many of the crystals are resorbed, and are characterised by diffuse, patchy zoning, and low MgO (Mg#70–80) and Cr2O3 contents. Such crystals also occur as relic cores in other phenocrysts. These grew in a magma that was more evolved than that of the host rock composition. Equilibrium clinopyroxenes are enriched in MgO (Mg#83–88) and Cr2O3 (~0.4–0.9wt%), and occur as reverse-zoned crystals, and rim/mantle overgrowths on relic cores of other crystals. These crystals and rim/mantles zones nucleated in magma with a composition similar to that of the host rock. The textural relationships demonstrate that a mafic magma intruded a more silicic resident magma, resulting in crystal-exchange and entrainment of antecrysts. Clinopyroxene-melt equilibria indicate that the crystallisation occurred at temperatures in the range 1135–1195°C, and pressures in the range 290–680MPa. The dominant pressure mode (400–550MPa) equates to depths of about 15–19km which coincides with a present-day body of partial melt in the crust. Higher pressures indicated by subordinate crystal populations indicate staged ascent and crystallisation above the Moho (~26km depth). Thus, the magmatic system is envisaged as a crystal mush column through the lower and mid crust. Such crystallisation histories are perhaps not expected in low flux, monogenetic magma systems, and reflect the importance of the crustal density structure beneath the volcanoes. Future activity could be preceded by seismic events in the lower crust as the magmas intrude localised crystal mush bodies.

Influence of B2O3 on Crystallization Behavior of Cr-bearing Phase in Stainless Steel Slag

This paper discussed the effects of B2O3 addition on the crystallization of Cr-bearing phase in synthetic stainless steel slag after different duration of molten slag at 1500 oC. The crystallized slag with or without B2O3 were then characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectrometer (EDS) and electron probe microanalysis (EPMA). The results show that B2O3 does not change the phase components of slag. However, the growth of Cr-bearing phase, magnesiochromite spinel, is enhanced and the content of Cr2O3 in the phase attains 52.66 wt.%, higher than that in the slag without B2O3.

An in-vitro bioactive, structural and degradation studies on B2O3–SiO2–P2O5–Na2O–CaO glass system incorporated with chromium ions

Calcium borosilicate glasses with composition 43B2O3–5SiO2–2 P2O5–20 Na2O–(30–x) CaO–x Cr2O3 with 0 ≤ x ≤ 1 mol%, have been prepared by the conventional melt-quenching technique. The samples were characterized by FTIR, UV-vis-absorption and X-ray diffraction techniques. The physico chemical properties such as density, molar volume, oxygen packing density and chromium ion concentration were also evaluated. The data obtained indicated that the Cr2O3 will break the bonds of the glass network by the creation of non bridging oxygens (NBO’s); as a result an increase in the volume of the glass network due to loosely packed structure. Results from FTIR, UV-vis.-spectroscopy studies indicated that Cr2O3 acted as a network modifier, by converting four coordinated to three coordinated boron atoms. In this context, we have examined the bioactivity of various concentrations of Cr2O3 doped glasses with the help of simulated body fluid (SBF). After immersion of glasses in the SBF, formation of hydroxyapatite layer on the surface was confirmed by XRD, FT-IR and SEM-EDS analysis. The solubility test data indicated that a clear increase of degradability of glass and significant change in the pH of the body fluid was observed with the addition of chromium. The results showed that partial substitution of Cr2O3 with CaO positively influenced the bioactivity. Thus bioactivity is increased with increase in the content of Cr2O3.

Fabrication of Carbon Nanotube Reinforced Al2O3/Cr2O3 Nanocomposites by Coprecipitation Process

In this research, the effect of multi-walled carbon nanotubes (MWCNTs) on the alumina/chromia (Al2O3/Cr2O3) nanocomposites has been investigated. Al2O3/Cr2O3-MWCNTs nanocomposites with variable contents of Cr2O3 and MWCNTs were fabricated using coprecipitation process and followed by spark plasma sintering. XRD analysis revealed a good crystallinity of sintered nanocomposites samples and there was only one phase presence of Al2O3-Cr2O3 solid solution. Density, Vickers microhardness, fracture toughness and fracture strength have been measured in the sintered samples. The results show that the relative density, microhardness and fracture strength of nanocomposites are significantly improved at low contents of Cr2O3 and MWCNTs. The increase of MWCNT’s content in the nanocomposites has adversely affected due to increasing the tangle and interaction of MWCNTs with each other, which leads to agglomeration in the nanocomposites. Increasing of Cr2O3 content in nanocomposites increases formation of Al2O3-Cr2O3 solid solution that actually requires the high sintering temperature to achieve good densification. The fracture toughness of Al2O3/Cr2O3-MWCNTs nanocomposites was enhanced by increasing the carbon nanotube content.

The influence of filler type on the separation properties of mixed-matrix membranes

Chitosan-based membranes filled with different metal oxide particles were prepared and their performance in ethanol dehydration process depending on the type of oxide and loading was discussed. For membrane preparation three oxides: TiO2, Cr2O3 or Fe3O4 were selected. From experimental data suitable ethanol and water transport coefficients were evaluated. As shown in the results, applied fillers in different ways affect the separation properties. Presence of TiO2 significantly affects the normalized total flux, increasing its value. On the other hand, addition of Fe3O4 influences most of all the separation factor, which is the among all investigated membranes. For membranes containing chromium(III) oxide as a filler, improvement in the separation properties is observed only in the case when the Cr2O3 content equals to 5 wt%. Above this concentration significant deterioration of separation properties is observed. The best performance has mixed-matrix membranes (MMMs) with magnetite, where the values of PSI are equal to 16.3 and 296.8 kg/m−2 h µm for pristine and 15 wt% filler content, respectively.

Effect of Cr2O3 modification on dielectric, ferroelectric and field-induced strain properties of 0.18Pb(Mg1/3Nb2/3)O3–0.82Pb(Zr0.49Ti0.51)O3 ceramics

A systematic investigation was performed to study the effect of Cr2O3 on dielectric, ferroelectric and field-induced strain properties of 0.18Pb(Mg1/3Nb2/3)O3–0.82Pb(Zr0.49Ti0.51)O3 (0.18PMN–0.82PZT) ceramics. The PMNZT/xCr2O3 (with x = 0, 0.1, 0.15, 0.2, 0.25, 0.30, 0.50 wt%) ceramics were prepared by solid state reaction and sintering process. Dielectric properties of the as-prepared ceramics were characterized, wherein the maximum dielectric constant (ɛ m) presents an increasing trend when x < 0.15, followed by a down-trend with an abrupt increase at x = 0.50. The temperature of maximum dielectric constant (T m) appears to display a slight change from 297 °C (x = 0.50) to 310 °C (x = 0.30). At 1 kHz, the sample with composition of x = 0.15 has the largest room temperature dielectric constant ɛ r of 1599 and maximum dielectric constant ɛ m of 25813 at T m, while the sample with composition of x = 0.3 possess the maximum dielectric relaxor factor of γ = 1.93. The remnant polarization gradually decreased from 37.3 to 23.10 μC/cm2 with increasing Cr2O3 content. Meanwhile, compared with pure 0.18PMN–0.82PZT, the coercive field (E c) of the 0.18PMN–0.82PZT+xCr2O3 ceramics are found to be significantly improved when x > 0.10. Furthermore, the field-induced strain of 0.18PMN–0.82PZT+xCr2O3 ceramics appeared to be lower than that of pure 0.18PMN–0.82PZT. However, an up-trend is observable in the field-induced strain of 0.18PMN–0.82PZT+xCr2O3 ceramics with increasing Cr2O3 content up to x = 0.15, which corresponds to a peak value of 0.158%.

PGE Mineralization of Massive Chromitites of the Iov Dunite Body (Northern Urals)

This work presents the results of the first comprehensive study of PGE mineralization from massive chromitites of the Iov dunite body (Northern Urals). The chromitites are composed of chromespinelides with a higher content of Cr2O3 with respect to those from other zonal clinopyroxenite–dunite massifs of the Urals. However, the composition of chromespinelides fits the trend that is characteristic of the dunite–clinopyroxenite–gabbro formation. PGE minerals, in particular Pt–Fe solid solutions, were identified in chromitites and in chromespinelides in the form of crystals and aggregates of a complex non-crystallographic habit and less often of an idiomorphic cubic habit. In terms of stoichiometry, Pt–Fe minerals correspond to ferroplatinum (Pt2Fe) and isoferroplatinum (Pt3Fe). The minerals of the isomorphic tetraferroplatinum–tulameenite–nickelferroplatinum series are widely distributed. Thus, the PGE mineralization of the Iov dunite body has features that are characteristic of clinopyroxenite–dunite massifs of the Urals.

Petrogenesis and Metallogenesis of the Mazaertag Layered Intrusion in the Tarim Large Igneous Province, NW China

AbstractThe Mazaertag layered intrusion is located in the northwestern part of the Tarim large igneous province where several early Permian layered mafic‐ultramafic intrusions host important Fe‐Ti oxide deposits. The intrusion covers an area of ∼0.13 km2 and has a vertical stratigraphic thickness of at least 300 m. It consists chiefly of olivine clinopyroxenite, and is cut through by the nearby mafic‐ultramafic dykes. In this paper, we report new mineral chemistry data and whole‐rock chemical and isotopic compositions for the Mazaertag intrusion along with whole‐rock isotopic compositions for the nearby mafic dykes. The averaged compositions of cumulus olivine, clinopyroxene and intercumulus plagioclase within individual samples range from Fo71–73, Mg# = 76 to 79 and An65–75 but they do not define sustained reversals. The observed mineral compositions are consistent with the differentiation of a single batch of magma in a closed system. Rocks of the Mazaertag intrusion are characterized by enrichment in light REE relative to heavy REE, positive Nb and Ta anomalies and a small range of age‐corrected ∊Nd(t) (−0.1 to +0.9) and initial 87Sr/86Sr values (0.7044 to 0.7068). The slightly lower ∊Nd(t), initial 206Pb/204Pb and higher initial 87Sr/86Sr values of the intrusion compared to those of the least contaminated dykes [∊Nd(t) = +2.8 to +3.4; (206Pb/204Pb), = 18.516–18.521; (87Sr/86Sr)1 = 0.7038–0.7041] imply that the Mazaertag magma was subjected to small to modest degrees of contamination by the upper crust. The Sr‐Nd isotopic compositions of the least contaminated dykes are consistent with derivation from a FOZO‐like mantle source. The parental magma of the Mazaertag intrusion, estimated from clinopyroxene compositions using mineral‐melt partition coefficients, has trace element compositions similar to some of the most primitive mafic dykes in the same area. This suggests that the Mazaertag intrusion and mafic dykes shared a similar mantle source. Therefore, the parental magma of the Mazaertag intrusion was interpreted to have originated from a mantle plume. Based on the Cr2O3 contents in titanomagnetite and less‐evolved characteristics of the Mazaertag intrusion compared to the Wajilitag Fe‐Ti oxide deposit in Bachu, it is speculated that there might not be a potential to find economic Fe‐Ti oxide mineralization in the intrusion.