ACCESSORY COPPER ORE MINERALS AS A KEY ISSUE IN UNDERSTANDING THE GENESIS OF THE MAYATAS META-CARBONATITE ORES (ULYTAU, CENTRAL KAZAKHSTAN)
Stepanets V.G. Levin V.L. Bekenova G.K. Khakimzhanov М.S. Togizov K.S.
2022National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2022#2Issue 452172 - 191 pp.
The copper-rich ores of the Maike occurrence are a classic magmatic (hydrothermal) association of sulphides located as a vein within carbon-bearing muscovite-clinochlore-quartz schists. These ores are sub-solidus (<600°C) products of decomposition of intermediate solid solution (ISS), which was crystallised (950-800°C) from highly fractionated sulphide liquid enriched with the elements: Pt, Pd, Ir, Ru, Rh, Os, Ag, As, Bi, Cd, Pb, Te, Zn, Y, Ce, La. Study of accessory minerals from the Maike copper ores occurrence, including sulphoarsenides and tellurides (containing platinoids, Ni, Pd, Sb, Ag, Pb and Co), allowed us to describe the mineral formation sequence of carbonatites genetically connected to intrusive and hydrothermal high-temperature activation of ultrabasic magmatism, possibly associated in early Paleozoic with a suprasubduction zone. Pentlandite of extremely low quantity contains Co, and pyrite is rich in Ni. Lead is held in galena, while Zn and Cd are in sphalerite. Rare earth elements (REE) are associated with phosphates and fluorophosphates. Platinoids are not concentrated in nonferrous metal sulphides (chalcopyrite, pentlandite, galena and sphalerite) and form the minerals we have identified (testibiopalladite (Pd(Sb,Bi)Te), sperrylite (PtAs2 ). They also are part of zonal sulphoarsenides and tellurides (melonite (NiTe2 ) and vavrinite (Ni2 SbTe2 ). The zonal nickel cobaltite is the richest in Pt, Ir, Rh, Ru, Os. The rhenium sulphides found in chalcopyrite and, extremely rarely, in pyrite, are of mineralogical significance only. The association of copper ores, carbonates (siderite, apatite), titanite, chrome-spinel, albite, quartz, garnet (pyrope-almandine series), chromium-bearing muscovite and chromium-rich clinochlore and their spatial relationship with graphite-quartz-chlorite schists allow us to consider these rocks as part of the silicate-carbonate-carbonaceous complex, reflecting the composition of mantle growth melt.
antimonide , arsenide , carbonatite , copper ores , platinoid , rhenium mineral , sulfarsenide , sulphide , Ulytau
Text of the article Перейти на текст статьи
Astra Mining Kazakhstan, 207 Regent, London, United Kingdom
Тhe “Satpayev Institute of GeoSciences” LLP, 69 Kabanbai Batyr St, Almaty, Kazakhstan
Kazakhstan Fortescue LLP, 140 Dostyk Ave, Almaty, Kazakhstan
Astra Mining Kazakhstan
Тhe “Satpayev Institute of GeoSciences” LLP
Kazakhstan Fortescue LLP
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026