Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Rare earth elements (REE) and isotope composition (δ13Cand δ18O) of manganese ores of Chiatura deposit (Georgia): features of ore formation and genesis

Rare earth elements (REE) and isotope composition (δ13Cand δ18O) of manganese ores of Chiatura... The rare earth elements (REE) geochemistry and the isotope (δ13C, δ18O) composition of manganese ores of the Chiatura (Georgia) deposit were studied. One of the major features of all types of manganese ores is negative cerium (Ce/Ce*PAAS) anomaly and the absence of europium (Eu/Eu*PAAS) anomaly. Oxide oolitic manganese ores were formed in oxic shallow marine environments. The content and distribution of REEs (in particular Ce and Eu) in these ores are connected mainly with ferrous oxides. The performed C- and O-isotope research in Mn-carbonates (oolitic and massive) has indicated that carbonate ores were formed by the participation of isotopically light CO2 which is a result of the oxidation of organic matter in the sediment strata by reducing environments of early diagenesis (and, partially, catagenesis) zone. Obtained negative cerium anomalies in the studied carbonate ores reflect the specific REE patterns in pore waters of sediments of earlier isdiagenesis zone of the Oligocene Chiatura’s basin. The deficiency of cerium in this zone remains debatable and requires further study.Formation of manganese carbonates took place multistage by the input of incisional solutions of different chemistry into sea bottom waters and sediments. The absence of europium anomaly indicates about lack of hydrothermal solution input. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Geochimica Springer Journals

Rare earth elements (REE) and isotope composition (δ13Cand δ18O) of manganese ores of Chiatura deposit (Georgia): features of ore formation and genesis

Loading next page...
 
/lp/springer-journals/rare-earth-elements-ree-and-isotope-composition-13cand-18o-of-AnauqdkJy0

References (101)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Science Press and Institute of Geochemistry, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2096-0956
eISSN
2365-7499
DOI
10.1007/s11631-023-00614-w
Publisher site
See Article on Publisher Site

Abstract

The rare earth elements (REE) geochemistry and the isotope (δ13C, δ18O) composition of manganese ores of the Chiatura (Georgia) deposit were studied. One of the major features of all types of manganese ores is negative cerium (Ce/Ce*PAAS) anomaly and the absence of europium (Eu/Eu*PAAS) anomaly. Oxide oolitic manganese ores were formed in oxic shallow marine environments. The content and distribution of REEs (in particular Ce and Eu) in these ores are connected mainly with ferrous oxides. The performed C- and O-isotope research in Mn-carbonates (oolitic and massive) has indicated that carbonate ores were formed by the participation of isotopically light CO2 which is a result of the oxidation of organic matter in the sediment strata by reducing environments of early diagenesis (and, partially, catagenesis) zone. Obtained negative cerium anomalies in the studied carbonate ores reflect the specific REE patterns in pore waters of sediments of earlier isdiagenesis zone of the Oligocene Chiatura’s basin. The deficiency of cerium in this zone remains debatable and requires further study.Formation of manganese carbonates took place multistage by the input of incisional solutions of different chemistry into sea bottom waters and sediments. The absence of europium anomaly indicates about lack of hydrothermal solution input.

Journal

Acta GeochimicaSpringer Journals

Published: Aug 1, 2023

Keywords: REE; Cerium anomaly; Carbon and oxygen isotope geochemistry; Oxide and carbonate manganese ores; Chiatura deposit

There are no references for this article.