Chromitites of the Akkarginskiy massif (the Southern Urals)

D. E. Saveliev, I. I. Musabirov

Abstract


We consider the geological features of ultramafic rock and chrome ore deposits. It is shown that all studied deposits are podiform in morphology that is typical for the ophiolite ultramafic rocks. Morphological and chemical features of the accessory and oreforming spinels are described. Accessory chrome spinels from ultramafic rocks are middle-Cr and high-Cr in chemistry (>42% Cr2O3). All studied ore-forming chrome spinels from deposits in the Main Ore Zone are high-Cr (54–63% Cr2O3). Some middle-Cr oreforming spinels were found in deposit of the East Ore Zone (48% Cr2O3). We adduce a proof of the tectonic origin of present-day structure of the Akkarginskiy massif and its chrome ore deposits.

Keywords


chromitite; ophiolite; ultramafic rock; chrome spinel; the Southern Urals

References


Varlakov A.S. 1978. Petrografiya, petrokhimiya i geokhimiya giperbazitov Orenburgskogo Urala [Petrography, petrochemistry and geochemistry of the Orenburg Urals hyperbasites]. Nauka, Мoskva, p. 240. (in Russian)

Varlakov A.S. 1986. Petrologiya protsessov serpentinizatsii giperbazitov [Petrology of serpentinization processes of folded belts hyperbasites]. Sverdlovsk, p. 224. (in Russian)

Vakhromeev S.A., Zimin I.A., Kozhevnikov K.E. et al. 1936. Uralskie mestorozhdeniya khromita [Uralian chromites deposits]. VIMS, Moskva-Leningrad, V.85, p. 240. (in Russian)

Dubinin V.S. 1962. Magmaticheskie formatsii Buruktalskogo rudnogo rayona i ikh metallogeniya [The magmatic formations of Buruktal ore districkt and their metallogeny]. Avtoref. Diss. cand.geol.-min.sci., Sverdlovsk, p. 24. (in Russian)

Kuliganyan M.E., Vdovina V.E. 1969. Buruktalskaya gruppa ultraosnovnykh massivov na vostochnom sklone Yuzhnogo Urala [Buruktalskaya group of ultramafic massifs on the east slope of the Southern Urals]. In Proc. of the second Uralian Petrography meeting. Sverdlovsk. 2:153–157. (in Russian) Malakhov I.A. 1966. Petrokhimiya ultrabazitov Urala [Petrochemistry of Uralian ultrabasites] Sverdlovsk, p. 234. (in Russian)

Nikitin K.K. 1962. Drevnyaya kora vyvetrivaniya Buruktalskogo massiva ultraosnovnykh porod [Ancient weathering crust of Buruktalsky massif of ultramafic rocks]. IGEM, Moskva, V.69, p. 191. (in Russian)

Reestr khromitoproyavleniy v alpinotipnykh ultrabazitakh Urala [Register of chromite occurences in the alpine-type ultrabasites] Ed. Perevozchikov B.V. 2000. Perm. p. 474. (in Russian)

Saveliev D.E. 2012. Khromitonosnost giperbasitovykh massivov Yuzhnogo Urala [Chromite mineralization of hyperbasite massifs of the Southern Urals]. Avtoref. Diss. cand.geol.min.sci., Perm, p. 44. (in Russian)

Saveliev D.E., Snachev V.I., Savelieva E.N., Bazhin E.A. 2008. Geologiya, petrogeokhimiya i khromitonosnost gabbro-giperbazitovykh massivov Yuzhnogo Urala [Geology, petrogeochemistry and chromitebearingness of the hyperbasite massifs of the Southern Urals]. DisingPolygraphServis, Ufa, p. 320. (in Russian)

Shkuropat B.A. 1969. Petrograficheskie i petrokhimicheskie osobennosti ultraosnovnykh porod Dgetygarinskogo rayona na Yuzhnom Urale [The petrographical and petrochemical features of ultramafic rocks of Dzhetygarinskiy district on the Southern Urals]. In Magmatic formations, metamorphism, metallogeny of the Urals. Sverdlovsk, pp. 105-108. (in Russian)

Shkuropat B.A., Borisova V.A. 1992. Mineralogicheskie i petrokhimicheskie osobennosti ultrabazitov Zauralskogo podnyatiya v svyazi s ikh tektonicheskim polozheniem [The mineralogical and petrochemical features of ultrabasites of Zauralian uplift according their tectonic setting]. In Voprosy geologii, mineralogii, geokhimii polexnykh iskopaemykh Yuzhnogo Urala. Ufa, pp. 89-98. (in Russian)

Edelstein I.I. 1968. Petrologiya giperbazitov Tobolo-Irgizskogo rayona Yuzhnogo Urala i osobennosti svyazannykh s nimi kor vyvetrivaniya [The petrology of hyperbasites of Tobol-Ipgiz province of the Southern Urals and features of associated weathering crusts]. Nauka, Moskva, p. 340. (in Russian)

Barnes S., Roeder P. 2001. The Range of spinel compositions in terrestrial mafic and ultramafic rocks. J. Petrology, 42:2279–2302. doi: 10.1093/petrology/42.12.2279

Cassard D., Nicolas A., Rabinowitch M., Moutte J., Leblanc M., Prinzhoffer A. 1981. Structural classification of chromite pods in Southern New Caledonia. Econ. Geology, 76:805–831.

Hock M., Friedrich G. 1985. Structural features of ophiolitic chromitites in the Zambales Range, Luzon, Philippines, Mineralium Deposita, 20:290–301.

Thayer T. P. 1964. Principal features and origin of podiform chromite deposits, and some observations on the Guleman-Soridag District, Turkey. Econ. Geology, 59:1497–1524




DOI: http://dx.doi.org/10.17072/psu.geol.17.1.61

Refbacks

  • There are currently no refbacks.