New data on formation conditions and origin of manganese carbonate ores in the Ulutelyak deposit (Bashkortostan)

被引：0
|
作者：
V. N. Kuleshov
机构：
[1] Russian Academy of Sciences,Geological Institute
来源：
Lithology and Mineral Resources | 2012年 / 47卷
关键词：
Anhydrite; Manganese Oxide; Oxygen Isotopic Composition; Kungurian; Manganese Deposit;
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摘要：
The carbon and oxygen isotopic compositions in rocks and ores of the Ulutelyak (Bashkortostan) manganese deposit of the Lower Permian (P1kg) are studied. Values of δ13C, ‰ (PDB) and δ18O, ‰ (SMOW) show the following range: from −3.8 to 3.3 and from 22.0 to 29.6, respectively, in manganese oxide-carbonate ores; from 2.7 to 4.1 and from 28.8 to 29.7, respectively, in non-ore carbonate-clayey interbeds of the ore member; and from 2.8 to 4.5 and from 29.5 to 30.0, respectively, in the underlying and overlying limestones. Lithological features and isotope data suggest that manganese carbonates were formed at the postsedimentary stage of rock transformation due to metasomatic replacement of the primary cyanobacterial sedimentary carbonates by the elisional manganiferous solutions.
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页码：305 / 318
页数：13
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