The chromite deposits in the khoy area have lenticular, tubular and vein-like shapes which are found in serpentinized hurzburgite. Chromite and serpentine are  major minerals and hematite and magnetite are minor phases in the chromitic ores .Furthermore, Fe , Ni , Cu , Co , Zn, Ru, Os, Ir, La, Ce, Gd and S elements are found as base metal sulfides ( BMS ) , sulfides of pelatinum group elements (PGE) , metal oxides , native elements , natural alloys and solid inclusions in chromite grains and or in serpentinic groundmass . These minerals have very fine grain sizes and recognitions of them by ore microscopic metod was  limited, so the investigations were continued by EMPA. The majority of these minerals have secondary origin and  are  related  with serpentinization  procceses and only a few of them have primary origin.Among sulfide minerals bravoite,pyrotite,milerite,linaite and pyrite have secondary origin , wheras pentlandite has primary one.Chalcopyrite has been formed in two generations , as both primary and secondary origins.Among primary PGE minerals lourite ((Ru , Os, Ir )S₂) is considerable , which was found as a solid inclusion in the chromite grain and has primary origin.Native metals and natural alloys such as nickel,copper,iron and josephinite (Ni₃Fe) have been formed in microfracturs of chromite grains filled by serpentine.A few REE-rich compositions were found in microfracturs also and have secondary origin.

The chromite deposits of Aland (Barajok and Kochak villages) and Gheshlagh area in the Khoy ophiolite occur as layered, lenticular or irregular masses, surrounded by dunitie and harzburgites. These chromites are compositionally similar to alpine-type chromites, characterized by nodular, massive, disseminated and banded textures. EMPA data show that they vary widely in term of Cr-number [100Cr/Cr+Al]. On average, Cr# of chromites in harzburgites is 45.13, in disseminate Gheshlagh and Barajok chromites are 40.58 and 58.12 respectively but in Barajok and Kochak Chromitites are 66.7 and 73.43 respectively. The chromite composition in terms of Cr#, Mg#, Cr₂O₃, Al₂O₃, Fe₂O₃, MgO and TiO₂ contents as well as correlation coefficients between different oxides, these chromits are comparable to podiform chromitites. The compositions of chromitites from Aland area with Cr#>66% and Gheshlagh area with Cr# about 40 wt% fall within high-Cr and high-Al types respectively. According to TiO₂, Cr₂O₃ and Al₂O₃ content of the samples, it seems that the Aland chromites were formed from boninitic magmas in a supra-subduction zone although the Gheshlagh chromites were formed from tholeiitic magma in a geotectonic setting similar to the MORB.

The Bandan chromite mine is the main chromite deposit in Sistan suture zone, eastrn Iran. The chromite deposits are structurally tabular to lens-shaped bodies hosted by dunitic to harzburgitic mantle peridotites. Similar to Alpine type podiform chromites, chromitite pods are enclosed within dunitic envelops. The chromites show mainly massive to disseminated and also brecciated textures. Chemically, the Cr/Fe ratio is higher than 2 and TiO₂ content in accordance with ophiolitic chromites is low (< 0.2 wt. %). As a result of low Cr# (Cr#=Cr×100/(Cr+Al)) ranging from 50 to 52 the Bandan chromite deposit is high-Al type. Calculated parental melt chemistry shows MORB (Mid-ocean ridge basalt)-type signature with Al₂O₃ and FeO/MgO ratio contents of 15-16 and 1.1-1.2, respectively. Although the geodynamic setting of high-Al podiform chromites have been debated but petrographical- geochemical characteristics of ophiolitic mantle-crust sequences may relate chromite genesis to supra subduction zone setting.

Chromite is one of the important mineral in all lithologies of the Dehsheikh ultramafic complex (South of Baft, Kerman Province) with different shapes and abundances. In the Dehsheikh harzburgites, this mineral present with two distinct generations. The first generation is refractory with variable Cr# values (between 46.2 to 60%) and contains low Al₂O₃ content (between 21 to 44.4 wt%). The second generation, as interstitial phase, is more Cr depleted and enriched in Al₂O₃ than the first one. Chemical composition of chromites from the Dehsheikh lherzolites is more similar to the second-type chromites of the Dehsheikh harzburgites. In the Dehsheikh irregular dunites, there are different shapes of chromites. The first group is chemically similar to those of the Dehsheikh chromitites, while the composition of second group is close to the harzburgitic refractory chromites. Cr-spinel in the Dehsheikh chromitties is characterized by high Cr# values (between 69 to 79) and in genetic diagram shows boninitic affinity. In TiO₂ vs. Al₂O₃ wt% discrimination diagram, the Dehsheikh chromites plot in suprasubduction zone field. Olivine-spinel geothermometry calculations on the Dehsheikh peridotites indicate subsolidus equilibrium temperatures (930 to 1080°C) for these rocks, while oxygen fugacity estimations yield values varing from +1.53 for the Dehsheikh lherzolites to +3.94 for irregular dunites. These values can be found in suprasubduction zone settings. In general, a suprasubduction zone with aqueous fluids derived from subducted oceanic slab is responsible for the formation of the Dehsheikh depleted peridotites and associated chromitites.

Gushk chromite mine is one of the largest and the most important chromite mines in Iran that is located in southwest of Kerman Province, 5 km north of Baft city. In this open pit active mine, about 60 tons of chromite is extracted per day. The studied chromitites are podiform type and form discontinuous layers or lenses surrounded by completely serpentinized dunites. The chromites with average Cr₂O₃ = 62.8% and Cr# = 0.83 are classified as Cr-rich chromitites or as the first grade type chromites in the world. Cr# and Mg# values indicate that the studied chromitites have been crystallized from boninitic magmas, probably in suprasubduction zone setting in a back-arc basin environment. It seems that the Baft chromitite ores have initially been formed in a primary ophiolitic complex within dunitic envelopes. In the next stage, due to serpentinization of the peridotites and ascending of the resulted serpentinite, the studied deposits have been emplaced along the shear zones of the Baft ophiolitic melange en route to the surface.

Significance of chromite, as the unique source for chromium, a metal with key role in industry, has inspired many geologists to investigate its genesis and natural distribution as an important contribution to its exploration in many parts of the world. To do this, geochemistry of chromite, which is considered to be the reflection of the nature of its parent magma and the geotectonic setting in which it is generated, is extensively used by many researchers. To reveal the nature of chromite’s parent magma, its chemical composition is used as a petrogenetic indicator. In this regard many authors have classified chromite deposits as either high-Al (Al₂O₃ ≥ 25 wt %) or high-Cr (Cr₂O₃ ≥ 45 to 60 wt %) and have demonstrated that Al-rich chromites are generated from tholiitic and Cr-rich ones from Mg-rich boninitic magmas, two melts generated in distinct and different geotectonic setting. In this study on the basis of geochemistry of chromite samples from three nearby mining districts in Sabzevar Ophiolite Range, in the North-East of Iran, the nature of chromite parent magma and its geotectonic setting is investigated. Chromite samples are analyzed by EPMA method. The layered chromitite bodies, embedded in serpenitnized dunite, are displayed to belong to high-Cr deposits. Considering high Cr# (86-88), moderate Mg# (44-51), low TiO₂ content (0.1-0.2 wt %) and other geochemical features of chromite, the parent magma dominantly accords with a high Mg# boninitic melt. According to the results of the previous works and petrography, geochemistry (especially Cr#, Mg#, Fe⁺³ and TiO₂ contents) and field observations represented in this work, the chromitites must be generated in a suprasubduction zone setting. Sea floor hydrothermal processes have probably caused especially, the Mg# not to be as high as expected.

The most important geological units in East of  Sarbisheh are Upper Cretaceous ophiolites assemblages that are predominantly serpentinized ultramafic in composition (dunite, harzburgite and pyroxenite). Chromite deposits in these rocks have generally various forms such as lenticular, layered and disseminated with varying dimensions. Textural studies on Golab Chromites show that they have primary textures such as massive and disseminated as well as secondary textures including cataclastic, mylonites, bereccia and extensional. Geochemistry of Golab Chromites points to average amounts of Cr₂O₃ (42.26%), MgO (17.23%), TiO₂ (0.36%) and Al₂O₃ (10.5%). The ratio Cr/Cr + Al (0.79 to 0.93) indicates that these chromites are enriched in Cr and depleted in Al. The high Cr₂O₃ and MgO contents in the Golab Chromite suggest that they were crystallized from a magma having relatively high degree of partial melting. High MgO content and Cr#, Mg# in Golab Chromites are comparable with typical parental boninitic magma. Podiform Chromitite deposits in East of Sarbisheh were probably formed in the mantle sequence, the latter was generated in the supra- subduction zone (SSZ). Golab Chromite are formed similar to Lubasa Ophiolite South Tabat.

The chromite deposits in the Neyriz area have lenticular and sometimes vein-like shape which are replaced in serpentinized dunite and harzburgite. Chromite and serpentinized olivines  are major minerals and hematite and magnetite are minor minerals in the chromitic ores. Except chromite, other minerals have secondary origin that  are related to serpentinization procceses. Whereas along with chromite, only a few of minerals such as  pentlandite have primary origin. Native copper and sulfides such as chalcopyrite and bornite have been formed secondarily in microfracturs of chromite grains filled by serpentine. The results of the geochemical data from chromite ores are indicated by the type of chromite in alpine. Despite being the most abundant element in LREE relative to HREE, only six elements Dy, Eu, La, Lu, Nd, and Y are the most common among other elements. Finally, chromite ore in the area is economic but the frequency of trace elements is minimal and non-economic.