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J Oulegue - One of the best experts on this subject based on the ideXlab platform.
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erratum to nature and origin of the vani Manganese Deposit milos greece an overview ore geol rev 18 2001 181 209
Ore Geology Reviews, 2002Co-Authors: Apostolos Liakopoulos, G P Glasby, C T Papavassiliou, J OulegueAbstract:Erratum to: Nature and origin of the Vani Manganese Deposit, Milos, Greece: an overview [Ore Geol. Rev. 18 (2001) 181–209] A. Liakopoulos , G.P. Glasby *, C.T. Papavassiliou , J. Boulegue c Institute of Geology and Mineral Exploration (I.G.M.E), 70 Messoghion St., 115 27 Athens, Greece Department of Economic Geology and Geochemistry, University of Athens, Panepistimioupoli, Zografou, Athens 157 84, Greece Science de la Terre et Evolution des Milieux Naturels, Case 3000, Universite Pierre et Marie Curie, 4, Place Jussieu, F-75252 Paris Cedex 05, France
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nature and origin of the vani Manganese Deposit milos greece an overview
Ore Geology Reviews, 2001Co-Authors: Apostolos Liakopoulos, G P Glasby, C T Papavassiliou, J OulegueAbstract:Abstract The Vani Manganese Deposit is located in the rugged NW sector of Milos Island. It occurs within the Vani volcano-sedimentary basin, which is underlain by dacitic domes and flows of Upper Pliocene age (3.5–2.0 Ma). The end of the emplacement of the dacites was marked by the collapse of the magma chamber, which resulted in a huge pyroclastic episode and the Deposition of a thick layer of pyroclastic material within a shallow submarine basin. This pyroclastic material subsequently compacted to form the volcaniclastic sandstone, which became the host for the Manganese ore beds which were about 4 m thick in the two sections studied. Hydrothermal fluids penetrated these sandstone horizons via fractures and fissures to produce the Manganese Deposit. The permeable nature of the sandstone facilitated the retention of the hydrothermal fluids within these layers. This permitted the fluids to cool slowly and Deposit the Manganese oxides almost quantitatively. Formation of the hydrothermal Manganese Deposit took place fairly rapidly over a period of several tens of thousands of years at most. Strong tectonic activity resulted in rapid uplift of the area which elevated the Deposit above sea level. Two generations of Manganese oxides have been identified within this Deposit; the first generation consists of pyrolusite and ramsdellite; the second generation of oxides of the isostructural series cryptomelane–hollandite–coronadite plus hydrohetaerolite characterized by high contents of K, Ba, Pb and Zn, respectively. This sequence is the result of a two-stage process of formation of the Manganese-oxide minerals in which a second high-salinity hydrothermal fluid enriched in Ba, Pb and Zn as a result of the dissolution of sulphide minerals remineralized the original Manganese-oxide assemblage. It is this two-stage process of formation, which was mainly responsible for the unique characteristics of this Deposit. Although formed in a submarine setting, the Deposit shows marked differences in mineralogy and composition from known submarine hydrothermal Manganese Deposits and is most analogous to the epithermal vein Deposits of the southwestern United States.
Tiebing Liu - One of the best experts on this subject based on the ideXlab platform.
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origin of the early sinian minle Manganese Deposit hunan province china
Ore Geology Reviews, 1999Co-Authors: Shiyu Tang, Tiebing LiuAbstract:Abstract The Minle Mn ores occur at the base of the Early Sinian Minle Formation black shales, on the southeast limb of the Motianling anticline. These rhodochrosite ores are rich in organic carbon and fossil algae and formed in a bay or lagoon on a paleo-continental margin with adjacent island barriers. The salinity of water in the Depositional basin was probably brackish. The partly restricted ocean basin was characterized by low-oxygen bottom waters and pore-water pH values ranging from 9 to 11 and neutral to negative Eh values, which produced alkaline and reducing conditions suitable for precipitation of MnCO 3 . Growth of blue algae played a role in concentrating metals, especially Mn, changing the sedimentary environment (photosynthesis prior to Deposition and degradation of organic matter during diagenesis), and enhancing the Deposition of MnCO 3 during diagenesis. The Mn was mainly derived from the continent, with some portion supplied from submarine volcanic activity and supracrustal deep-seated hydrothermal fluids.
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characteristics of the devonian xialei Manganese Deposit guangxi zhuang autonomous region china
Ore Geology Reviews, 1999Co-Authors: Youyi Zeng, Tiebing LiuAbstract:Abstract The Xialei Mn Deposit occurs in the Late Devonian (Famenian) Wuzhishan Formation and consists of three ore horizons composed of three ore types: (1) Mn carbonate, (2) Mn silicate–Mn carbonate, and (3) Mn-oxide. Mn silicate–Mn carbonate ore beds consist of Mn carbonates and associated rhodonite, stilpnomelane, actinolite, chlorite, Mn epidote, biotite, and Mn–Fe antigorite. These minerals are mixed with each other and form thin beds, bands, pelletal and pisolitic grains, and horizontal or wavy laminae. Abundant oolitic and pisolitic grains in Mn ore beds show distinct boundaries and nuclei of Mn carbonate and Mn silicate minerals, rarely clastic grains. The ore Deposit is divided into three zones: (1) an inner zone composed of Mn carbonate, silicate, and oxide minerals; (2) a transitional zone consisting of Mn carbonate and stilpnomelane; and (3) an outer zone characterized by Mn carbonate. Argillaceous limestone at the base of the ore beds has a mean δ 13 C PDB of about 0.0‰, indicating that the carbon was derived from seawater bicarbonate. The δ 13 C PDB of Mn carbonate ranges from −2.8 to −14.3‰ (mean −7.1‰), indicating that the carbon was derived from both degradation of organic matter and seawater bicarbonate. Ores formed in a trough on a carbonate platform. Primary sedimentary Mn carbonates precipitated from alkaline and negative Eh waters in the diagenetic zone of sulfate reduction, which occurred either during shallow burial or at the seafloor. Oolites and pisolites formed by sedimentary processes on the seafloor. In places, Deposits were reworded and transported by gravity-flow processes. The region where these sedimentary-diagenetic Mn Deposits formed was intruded by magma, and hydrothermal fluids with dissolved metals leached from volcanic and sedimentary rocks ascended along fractures. The Mn silicate–Mn carbonate ore may have been produced by contact metamorphism of primary carbonate ore and metal sulfides Deposited by hydrothermal fluids, which overprinted the primary sedimentary ore.
G P Glasby - One of the best experts on this subject based on the ideXlab platform.
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new geochemical and mineralogical constraints on the genesis of the vani hydrothermal Manganese Deposit at nw milos island greece comparison with the aspro gialoudi Deposit and implications for the formation of the milos Manganese mineralization
Ore Geology Reviews, 2017Co-Authors: K Papavassiliou, G P Glasby, Christos Kanellopoulos, Dimitrios Alfieris, Panagiotis Voudouris, Ioannis MitsisAbstract:Abstract The Mn-Ba-Pb Deposit at Aspro Gialoudi in NW Milos is shown to be a fossil inhalative-exhalative hydrothermal Deposit that represents the deepest part of the Vani succession at the western extremity of the main Vani Manganese Deposit. The geology of the Vani-Aspro Gialoudi area is characterized by Upper Pliocene-Lower Pleistocene dacitic and rhyodacitic lava domes, which are overlain by the Vani volcaniclastic unit considered to be part of the 2.66–1.44 Ma magmatic event at Milos Island. The presence of in-situ and intrusive hyaloclastite breccias surrounding the coherent lava domes at Aspro Gialoudi and Vani areas indicates submarine emplacement for the domes. The dacitic-rhyodacitic domes are variously altered (mainly propylitic and/or argillic alteration, silicified and in some cases locally exhibiting adularia alteration). Both Aspro Gialoudi and main Vani Deposit are located proximal to fault systems: the main Vani Manganese Deposit is adjacent to the NW-trending Kondaros-Katsimouti-Vani Dome fault, whereas the Aspro Gialoudi Deposit is adjacent to the relatively minor NE-trending fault on the west coast of Milos. At Aspro Gialoudi, mineralization took place in a subseafloor and/or seafloor environment and is characterized by a stratabound Mn-barite-rich Deposit mainly within a package of propylitized intrusive hyaloclastites and within the overlying sandstones. Banded epithermal veins trending NE-SW and composed of chalcedonic silica/quartz + barite + Mn-oxide ± sulfides crosscut the dacitic lavas, the hyaloclastites and the overlying volcaniclastic sequence at Aspro Gialoudi and are considered to represent the feeder zones of the Manganese-barite mineralization. Within the veins, early sulfide (galena-sphalerite) barite and quartz Deposition is followed by Manganese oxides and aragonite, thus resembling the epithermal-style Pb-Zn-Ag-Mn mineralization across the NW-trending Katsimoutis-Kondaros-Vani fault. Mineralization in Aspro Gialoudi and Vani Deposits seems to be controlled by alternating cycles of Deposition of sulfides and hydrothermal Manganese oxides within the faults. Manganese Deposition in both Deposits formed in a similar manner, namely by transport of hydrothermal fluids through the adjacent fault systems into a reservoir of volcanoclastic sandstone and hyaloclastites to produce a Deposit initially consisting of principally of pyrolusite and occasionally ramsdellite, which were subsequently replaced by cryptomelane, hollandite, coronadite and hydrohaeterolite. Precipitation of hydrothermal Manganese oxides took place very quick and under microbial Mn(II) oxidation. Compositional data show that metallic elements most enriched in the Aspro Gialoudi and Vani Manganese Deposits relative to the average continental crust, lie in the sequences Pb > Cd > Mn > As > Sb > Zn > W > Tl > Ba > Cu > Mo > Co > Bi and As > Sb > Pb > Mn > Tl > Cd > Zn > W > Cu > Ba > Mo > Co, respectively. Mineralogical and geochemical (e.g. REE) data from both Aspro Gialoudi and main Vani Deposit are taken to indicate mainly a seawater source for the hydrothermal fluids. These two Deposits are genetically and spatially related to base- and precious metal intermediate-sulfidation epithermal mineralization. They formed successively by similar processes and are considered to be integral parts of the same hydrothermal system.
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the vani Manganese Deposit milos island greece a fossil stratabound mn ba pb zn as sb w rich hydrothermal Deposit
Developments in Volcanology, 2005Co-Authors: G P Glasby, C T Papavassiliou, J Mitsis, Eugenia Valsamijones, Apostolos Liakopoulos, R M RenneAbstract:The Vani Manganese Deposit is a fossil stratabound hydrothermal Deposit formed by the penetration of hydrothermal fluids through a lithified pyroclastic tuff. Two types of Deposit have been recognized: “high-temperature” hydrothermal Mn Deposits formed initially when the hydrothermal fluids penetrated faults and fissures within the volcaniclastic sandstone and bedded hydrothermal Mn Deposits formed subsequently as the cooling hydrothermal fluids migrated along the bedding planes of the volcaniclastic sandstone. Both are late-stage, low-temperature Deposits. Mineralogical analysis showed that the principal Manganese minerals present are (in decreasing order of abundance) cryptomelane, pyrolusite, hollandite, ramsdellite, coronadite and romancheite with jacobsite, franklinite and hydrohetaerolite present in minor amounts. On average, the “high-temperature” hydrothermal Mn Deposits appear to be marginally enriched in pyrolusite, ramsdellite and perhaps coronadite and jacobsite and depleted in haematite compared to the bedded hydrothermal Mn Deposits but these variations are not statistically significant. Variations in the abundances of minerals between individual samples are much greater with pyrolusite, cryptomelane and hollandite varying between low and very abundant and ramsdellite, coronadite, romanechite and barite between absent and very abundant. However, no systematic patterns in the relative abundances of the various minerals could be observed. The compositional data also showed wide variations in element concentrations between samples. On average, the “high-temperature” Deposits are significantly enriched in Mn and the bedded Deposits in Na, K, Mg, Ca, Al, Ti, Fe, Zn, Zr, Nb, Ce, Hf and Th. This reflects the fact that the “high-temperature” Deposits formed first when the Mn concentration in the hydrothermal fluids was higher. The bedded Deposits formed subsequently and are characterized by higher concentrations of lithogenous elements derived from the associated volcaniclastic sandstone. However, no well-defined patterns of association between the ore-forming elements could be observed in the samples. Nonetheless, these data demonstrate that the Vani Manganese Deposit is a Mn-Ba-Pb-Zn-As-Sb-W-rich hydrothermal Deposit which is similar in mineralogy and composition to the epithermal vein Deposits of the southwestern United States. Based on a comparison with the JADE submarine hydrothermal field in the Okinawa Trough, it is suggested that Pb, Zn As and Sb may have been leached as chloro complexes from felsic rocks of the Aegean intracontinental Arc by deeply penetrating chloride-rich hydrothermal fluids during the formation of the Vani Manganese Deposit, although a magmatic contribution is possible. The high positive Eu anomalies in the Deposit confirm that leaching of the divalent Eu 2+ from the host rocks took place at temperatures greater than 250°C during this time.
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erratum to nature and origin of the vani Manganese Deposit milos greece an overview ore geol rev 18 2001 181 209
Ore Geology Reviews, 2002Co-Authors: Apostolos Liakopoulos, G P Glasby, C T Papavassiliou, J OulegueAbstract:Erratum to: Nature and origin of the Vani Manganese Deposit, Milos, Greece: an overview [Ore Geol. Rev. 18 (2001) 181–209] A. Liakopoulos , G.P. Glasby *, C.T. Papavassiliou , J. Boulegue c Institute of Geology and Mineral Exploration (I.G.M.E), 70 Messoghion St., 115 27 Athens, Greece Department of Economic Geology and Geochemistry, University of Athens, Panepistimioupoli, Zografou, Athens 157 84, Greece Science de la Terre et Evolution des Milieux Naturels, Case 3000, Universite Pierre et Marie Curie, 4, Place Jussieu, F-75252 Paris Cedex 05, France
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nature and origin of the vani Manganese Deposit milos greece an overview
Ore Geology Reviews, 2001Co-Authors: Apostolos Liakopoulos, G P Glasby, C T Papavassiliou, J OulegueAbstract:Abstract The Vani Manganese Deposit is located in the rugged NW sector of Milos Island. It occurs within the Vani volcano-sedimentary basin, which is underlain by dacitic domes and flows of Upper Pliocene age (3.5–2.0 Ma). The end of the emplacement of the dacites was marked by the collapse of the magma chamber, which resulted in a huge pyroclastic episode and the Deposition of a thick layer of pyroclastic material within a shallow submarine basin. This pyroclastic material subsequently compacted to form the volcaniclastic sandstone, which became the host for the Manganese ore beds which were about 4 m thick in the two sections studied. Hydrothermal fluids penetrated these sandstone horizons via fractures and fissures to produce the Manganese Deposit. The permeable nature of the sandstone facilitated the retention of the hydrothermal fluids within these layers. This permitted the fluids to cool slowly and Deposit the Manganese oxides almost quantitatively. Formation of the hydrothermal Manganese Deposit took place fairly rapidly over a period of several tens of thousands of years at most. Strong tectonic activity resulted in rapid uplift of the area which elevated the Deposit above sea level. Two generations of Manganese oxides have been identified within this Deposit; the first generation consists of pyrolusite and ramsdellite; the second generation of oxides of the isostructural series cryptomelane–hollandite–coronadite plus hydrohetaerolite characterized by high contents of K, Ba, Pb and Zn, respectively. This sequence is the result of a two-stage process of formation of the Manganese-oxide minerals in which a second high-salinity hydrothermal fluid enriched in Ba, Pb and Zn as a result of the dissolution of sulphide minerals remineralized the original Manganese-oxide assemblage. It is this two-stage process of formation, which was mainly responsible for the unique characteristics of this Deposit. Although formed in a submarine setting, the Deposit shows marked differences in mineralogy and composition from known submarine hydrothermal Manganese Deposits and is most analogous to the epithermal vein Deposits of the southwestern United States.
Apostolos Liakopoulos - One of the best experts on this subject based on the ideXlab platform.
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the vani Manganese Deposit milos island greece a fossil stratabound mn ba pb zn as sb w rich hydrothermal Deposit
Developments in Volcanology, 2005Co-Authors: G P Glasby, C T Papavassiliou, J Mitsis, Eugenia Valsamijones, Apostolos Liakopoulos, R M RenneAbstract:The Vani Manganese Deposit is a fossil stratabound hydrothermal Deposit formed by the penetration of hydrothermal fluids through a lithified pyroclastic tuff. Two types of Deposit have been recognized: “high-temperature” hydrothermal Mn Deposits formed initially when the hydrothermal fluids penetrated faults and fissures within the volcaniclastic sandstone and bedded hydrothermal Mn Deposits formed subsequently as the cooling hydrothermal fluids migrated along the bedding planes of the volcaniclastic sandstone. Both are late-stage, low-temperature Deposits. Mineralogical analysis showed that the principal Manganese minerals present are (in decreasing order of abundance) cryptomelane, pyrolusite, hollandite, ramsdellite, coronadite and romancheite with jacobsite, franklinite and hydrohetaerolite present in minor amounts. On average, the “high-temperature” hydrothermal Mn Deposits appear to be marginally enriched in pyrolusite, ramsdellite and perhaps coronadite and jacobsite and depleted in haematite compared to the bedded hydrothermal Mn Deposits but these variations are not statistically significant. Variations in the abundances of minerals between individual samples are much greater with pyrolusite, cryptomelane and hollandite varying between low and very abundant and ramsdellite, coronadite, romanechite and barite between absent and very abundant. However, no systematic patterns in the relative abundances of the various minerals could be observed. The compositional data also showed wide variations in element concentrations between samples. On average, the “high-temperature” Deposits are significantly enriched in Mn and the bedded Deposits in Na, K, Mg, Ca, Al, Ti, Fe, Zn, Zr, Nb, Ce, Hf and Th. This reflects the fact that the “high-temperature” Deposits formed first when the Mn concentration in the hydrothermal fluids was higher. The bedded Deposits formed subsequently and are characterized by higher concentrations of lithogenous elements derived from the associated volcaniclastic sandstone. However, no well-defined patterns of association between the ore-forming elements could be observed in the samples. Nonetheless, these data demonstrate that the Vani Manganese Deposit is a Mn-Ba-Pb-Zn-As-Sb-W-rich hydrothermal Deposit which is similar in mineralogy and composition to the epithermal vein Deposits of the southwestern United States. Based on a comparison with the JADE submarine hydrothermal field in the Okinawa Trough, it is suggested that Pb, Zn As and Sb may have been leached as chloro complexes from felsic rocks of the Aegean intracontinental Arc by deeply penetrating chloride-rich hydrothermal fluids during the formation of the Vani Manganese Deposit, although a magmatic contribution is possible. The high positive Eu anomalies in the Deposit confirm that leaching of the divalent Eu 2+ from the host rocks took place at temperatures greater than 250°C during this time.
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erratum to nature and origin of the vani Manganese Deposit milos greece an overview ore geol rev 18 2001 181 209
Ore Geology Reviews, 2002Co-Authors: Apostolos Liakopoulos, G P Glasby, C T Papavassiliou, J OulegueAbstract:Erratum to: Nature and origin of the Vani Manganese Deposit, Milos, Greece: an overview [Ore Geol. Rev. 18 (2001) 181–209] A. Liakopoulos , G.P. Glasby *, C.T. Papavassiliou , J. Boulegue c Institute of Geology and Mineral Exploration (I.G.M.E), 70 Messoghion St., 115 27 Athens, Greece Department of Economic Geology and Geochemistry, University of Athens, Panepistimioupoli, Zografou, Athens 157 84, Greece Science de la Terre et Evolution des Milieux Naturels, Case 3000, Universite Pierre et Marie Curie, 4, Place Jussieu, F-75252 Paris Cedex 05, France
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nature and origin of the vani Manganese Deposit milos greece an overview
Ore Geology Reviews, 2001Co-Authors: Apostolos Liakopoulos, G P Glasby, C T Papavassiliou, J OulegueAbstract:Abstract The Vani Manganese Deposit is located in the rugged NW sector of Milos Island. It occurs within the Vani volcano-sedimentary basin, which is underlain by dacitic domes and flows of Upper Pliocene age (3.5–2.0 Ma). The end of the emplacement of the dacites was marked by the collapse of the magma chamber, which resulted in a huge pyroclastic episode and the Deposition of a thick layer of pyroclastic material within a shallow submarine basin. This pyroclastic material subsequently compacted to form the volcaniclastic sandstone, which became the host for the Manganese ore beds which were about 4 m thick in the two sections studied. Hydrothermal fluids penetrated these sandstone horizons via fractures and fissures to produce the Manganese Deposit. The permeable nature of the sandstone facilitated the retention of the hydrothermal fluids within these layers. This permitted the fluids to cool slowly and Deposit the Manganese oxides almost quantitatively. Formation of the hydrothermal Manganese Deposit took place fairly rapidly over a period of several tens of thousands of years at most. Strong tectonic activity resulted in rapid uplift of the area which elevated the Deposit above sea level. Two generations of Manganese oxides have been identified within this Deposit; the first generation consists of pyrolusite and ramsdellite; the second generation of oxides of the isostructural series cryptomelane–hollandite–coronadite plus hydrohetaerolite characterized by high contents of K, Ba, Pb and Zn, respectively. This sequence is the result of a two-stage process of formation of the Manganese-oxide minerals in which a second high-salinity hydrothermal fluid enriched in Ba, Pb and Zn as a result of the dissolution of sulphide minerals remineralized the original Manganese-oxide assemblage. It is this two-stage process of formation, which was mainly responsible for the unique characteristics of this Deposit. Although formed in a submarine setting, the Deposit shows marked differences in mineralogy and composition from known submarine hydrothermal Manganese Deposits and is most analogous to the epithermal vein Deposits of the southwestern United States.
Jianbing Dua - One of the best experts on this subject based on the ideXlab platform.
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genesis of the dounan Manganese Deposit of southeast yunnan china constraints from the mineralogy and geochemistry of micronodules
Journal of Geochemical Exploration, 2020Co-Authors: Jianbing Dua, Zhengwei Zhang, Jiafei XiaoAbstract:Abstract The Dounan Manganese Deposit in the Middle Triassic Falang Formation has prominent features like oolitic Mn ores, which are in micronodule form. Detailed petrological, mineralogical, and geochemical analyses were carried out on bulk samples and typical micronodules to clarify the Deposit's material source, metallogenic environment, genesis, and formation mechanism of the micronodules. The ore minerals are mainly braunite, manganite, Ca-rhodochrosite, kutnahorite, and manganocalcite. The micronodules usually exhibit a detrital nucleus and concentric rings consisting of braunite and Mn carbonate. Good correlations were detected among the Si, Al, Ti, and ∑REE in the ore compositions. The trace elements in the bulk samples and micronodules exhibited similar distribution patterns, and both are enriched in Co, Ni, and Sr and depleted in Cr, Rb, Zr, Nb, Ba, and Th. The micronodules, which are dominated by braunite, are more enriched in V, Co, Ni, Cu, Zn, Mo, and U than the Mn-carbonate-based ones. The ∑REE of the micronodules was higher than that of the bulk samples, but REE patterns were similar. δCe showed weakly positive or negative anomalies, and δEu showed weakly positive anomalies. These results suggest that the ore-forming materials were from various sources, which could have included weathered Mn-bearing rocks from the Yuebei palaeoisland and Emeishan basalts from adjacent ancient lands, as well as a hydrothermal source; mineralisation occurred in a marginal shallow-marine environment with weakly alkaline seawater during fluctuating redox conditions. The micronodules formed via a combination of chemical and biological processes.
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the metallogenic environment of the dounan Manganese Deposit southeast yunnan china evidence from geochemistry and mossbauer spectroscopic
Acta Geochimica, 2019Co-Authors: Jianbing Dua, Zhengwei Zhang, Jiafei XiaoAbstract:The Dounan Manganese Deposit is a typical large-scale marine sedimentary Manganese Deposit of the Middle Triassic in China. The metallogenic environment and change process directly dictate the migration, enrichment, and precipitation of Mn. To better understand its metallogenetic environment, a detailed study was undertaken involving field observation, mineralogical and geochemical and Mossbauer spectroscopic analyses. The major findings are as follows: (1) Lithofacies paleogeography, sedimentary structural characteristics, and geochemical indexes indicate that the Deposits were formed in an epicontinental marine sedimentary basin environment of normal salinity; (2) there were three ore phases including Mn oxides, Mn carbonates, and mixed Mn ores. The ore minerals found were braunite, manganite, Ca-rhodochrosite, manganocalcite, and kutnahorite. Petrographic and mineralogical information indicates that the metallogenic environment was a weakly alkaline and weakly oxidized to weakly reduced environment, and the mineralization occurred near the redox interface; (3) the V/(V + Ni) ratios, δCe and Fe2+/Fe3+ found in profiles of Baigu and Gake ore sections show that the redox conditions of the ore-forming environment were continuously changing; and (4) three Fe species, α-Fe2O3, para-Fe3+, and para-Fe2+, were found in hematite and clay mineral samples using Mossbauer spectrum analysis. The presence and distribution of these Fe species indicate that the Deposit was formed in a typical sedimentary environment during the mineralization process. In summary, our study showed that redox was a key factor controlling the mineralization of the Dounan Manganese Deposit. Our results have led us to the conclusion that transgression and regression caused fluctuations in sea level, which in turn caused the change of the redox environment. Mossbauer spectroscopy is an effective tool for studying the redox conditions of the paleoenvironment in which sedimentary Manganese Deposits were formed.