Abstract
Permian manganese ore deposits are widely distributed in southwestern and eastern China. Guichi Permian manganese district in southern Anhui Province, central eastern China, is currently the most important manganese metal producers in eastern China. Manganese ores (MnO=18.2–45.4wt.%) in Guichi region occur in calcareous, argillaceous and siliceous Mn-bearing sequence of the Permian Gufeng Formation. In contrast to Mn-bearing rocks, the ores have higher Mn, Fe, P, Sr (more than 1500ppm) and Ni contents (>480ppm), higher Mn/Fe (>5) and Lan/Cen (>2) values, and lower Co/Ni (<0.05) ratios. The Guichi manganese deposits also have low Co/Ni (<1) and Co/Zn ratios, low in total REE contents (mostly<100ppm) with negative Eu (0.46–0.75) and Ce (0.42–0.76) anomalies. The mineralogy and geochemistry of manganese deposits in the Guichi region strongly indicate hydrothermal activities, which is supported by high paleotemperatures (49–71°C) of Permian Mn-carbonate ore and Mn-bearing carbonate. The low Ceanom. values (<−0.1) and high strontium contents indicate that the Guichi manganese deposits were formed in high-salinity and oxidative marine sedimentary environment. The Al2O3/TiO2 (9.23–48.2) and Y/Ho (25.9–44.4) ratios, REE patterns, δ13CV-PDB (−10.2‰ to 5.00‰) and δ18OSMOW (20.7–28.0‰) characteristics of Permian manganese deposits reveal a mixed Mn source of volcanic, terrigenous and organic matter.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
