HERE
发表于 2025-3-27 00:46:13
The Nb-Ta-Zr-REE-Y Katugin Deposit, REE-fluorite, monazite, and cryolite are the major minerals. Fergusonite, ilmenite, and ilmenorutile are widespread in the metasomatized country rocks. It was suggested that deposit was formed as a result of metasomatism, but nowadays there is an opinion on its magmatic origin.
Rustproof
发表于 2025-3-27 03:39:14
Regional Geology of the Kodar-Udokan Mineral District Craton, sandwiched between the Phanerozoic Baikal-Muya and Mongol-Okhotsk mobile belts. It comprises many deposits of Cu, V, Fe, Ag, Ti, V, Ta-Nb, Zr, and REE-Y of different genetic types in sedimentary and magmatic rocks. The sandstones of the Udokan Supergroup, the gabbro rocks of the Chiney Intr
破布
发表于 2025-3-27 05:39:55
The Cu-Ag-Fe Udokan Depositddition to the giant Udokan deposit, the basin hosts many smaller satellite deposits and occurrences. The Paleoproterozoic Sakukan Formation, hosting cupriferous sandstone units, and the overlaying Naminga Formation are principal hosting stratigraphic units of the Udokan deposit, forming a Naminga b
Frenetic
发表于 2025-3-27 11:54:05
Satellite Sandstone-Hosted Cu-Ag-Fe Deposits in Rocks of the Udokan Supergroupt formations at different stratigraphic levels. They differ strongly in mineral and chemical composition from the Udokan ores, often displaying much higher silver grades. The hypogene copper mineralization in these deposits consists of chalcopyrite, bornite, and, to a much lesser extent, chalcocite.
optic-nerve
发表于 2025-3-27 14:38:49
The Chiney Layered Pluton: Structure and Mineral CompositionE-Cu-Ni. The ores related to the Chiney intrusion differ from the ores of other Cu-Ni deposits in their high Cu/Ni ratio (~100). Its age is estimated as 1880–1850 Ma. It consists of the Western, Central, Eastern, and Southeastern blocks. Four main groups of intrusive rocks were recognized within the
少量
发表于 2025-3-27 18:11:32
Chemistry and General Typification of Intrusive RocksAll rocks, except norite, are enriched in Fe and Ti. The MgO and TiO. variations demonstrate a rhythmic structure of the Chiney pluton. Distribution of rare elements in rocks is similar to the distribution in typical crustal rocks with negative Ta-Nb and positive Pb anomalies. Techniques of geochemi
aerial
发表于 2025-3-28 00:53:03
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让空气进入
发表于 2025-3-28 02:33:31
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Indurate
发表于 2025-3-28 06:18:52
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Nomadic
发表于 2025-3-28 13:33:46
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