『(Abstract)
Accumulation of manganiferous rocks in the history of the Earth's
lithosphere evolution began not later than the end of the Middle
Archean. Primary manganese sediments were accumulated at that
time in shallow-water sedimentation basins with the active participation
of organic matter. The concentration of Mn in the primary sediments
usually did not reach economic values. The formation of genuine
manganese ores is related to later processes of the transformation
of primary ores - diagenesis, catagenesis, metamorphism, and retrograde
diagenesis. Types of basins of manganese ore sedimentation and
character of processes of the formation of manganese sediments
during the Earth's shell evolution changed appreciably and correlated
with the general evolution of paleocontinents. Major periods,
epochs, and phases of manganese ore genesis are defined. At the
early stages of lithosphere formation (Archean-Proterozoic), manganese
was deposited in basins commonly confined to the central part
of Western Gondwana and western part of Eastern Gondwana, as well
as the western part of the Ur paleocontinent. Basins of manganese
ore sedimentation were characterized by the ferruginous-siliceous,
carbonaceous-clayey, and carbonaceous-carbonate-clayey composition.
The Early-Middle Paleozoic epoch of manganiferous sediment accumulation
was characterized by the presence of several small sedimentation
basins with active manifestation of volcanic and hydrothermal
activity. Since the formation of Pangea in the Late Paleozoic
until its breakup, accumulation of Mn was closely associated with
processes of diagenesis and active participation of the oxidized
organic matter.』
(Introduction)
Major periods and epochs of manganese accumulation in the Earth's
history
The Archean metallogenic period
Phanerozoic metallogenic period
The Meso-Cenozoic manganese ore epoch (T-Pg)
Evolution of manganese ore genesis in the Earth's history
Conclusions
Acknowledgments
References
Fig. 1. Distribution of Mn reserves and resources in differentage rocks of the Earth’s lithosphere. (1) Reserves; (2) resources; (3) Archean manganiferous rocks; (4) major metallogenic phases of the accumulation of manganese rocks and ores: (1) Early Proterozoic, (2) Middle Proterozoic, (3) Late Proterozoic, (4) Early-Middle Paleozoic, (5) Late Paleozoic, (6) Mesozoic, (7) Late Mesozoic-Early Cenozoic; (5) major biotic events in the Phanerozoic (Alekseev, 1989, 1998). |
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Fig. 2. Development of manganese rocks and ores in the Archean and Early Proterozoic in Pangea 0.3 Ga ago. Based on (Rogers, 1996). (1-4) Age of rocks in continental blocks, Ga: (1) 1.2, (2) 1.5-2, (3) 2.5, (4) 3 or more; (5) boundary of Western Gondwana; (6) field of Archean manganese rocks and ores; (7) positions of Early Proterozoic manganese deposits; (8) field of Early Proterozoic sedimentation with manganese ore specialization. Latin letter designations: (AL) Aldan; (AR) Aravalli; (AN/AC) Anabar /Angara; (BA/UK) Baltia/Ukraine; (BH) Bhandara (Bastar); (BR) Brazil (Guapore); (BU) Bundelhand; (CA) Central Arabia; (CK) Congo/Kasai; (DH) Dharwar (Western and Eastern); (DM) Western Dronning Maud Land; (EA) Eastern Australia; (GA) Gavler; (GU) Guayana; (HE) Herne; (NT) terranes including the Archean blocks of North Africa; (KA) Kaapvaal; (KI) Kimberley; (KZ) Kazakhstan; (MA) Madagascar; (NA) North Atlantic (including Nain, Greenland, and Levisian); (NAS) PanAfrican crust of the Nubian.Arabiann Shield; (NC) North Chinese (SinoKorean); (NP) Napier; (PI) Pilbara; (RA) Rae; (RP) Rio de la Plata; (SC) South Chines (Yangtse); (SF) San Franciso (including Salvador); (SI) Singbhum; (SL) Slave; (SU) Superior; (TA) Tarim; (TZ) Tansania; (VE) Vestfold; (WA) West Africa; (WN)Western Nile; (YI) Ylgarn; (ZI) Zimbabwe. |
Fig. 3. Manganese rock terranes during the existence of Atlantica. Modified after (Rogers, 1996). (1) Boundaries of paleocontinents; (2) domains of manganese deposits developed after gondites and ampelites; (3) boundaries of manganese deposits associated with the ferruginous.siliceous rocks; (4) major manganese deposits developed after gondites and ampelites; (5) major manganese deposits associated with the ferruginous.siliceous rocks. |
Fig. 4. Locations of manganese rocks and ores in the Late Proterozoic supercontinent Rodinia. Outlines of paleocontinents are shown as of 900 Ma ago, according to (Bogdanova et al., 2009). (1) Inferred shelf margins; (2) major collisional orogens of the Rodinia breakup period; (3, 4) basins with manganese rock formation in the Middle and Late Proterozoic, respectively; (5) boundary of the major manganese ore zone in the Middle and Late Proterozoic. |
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Kuleshov(2011)による『Manganese deposits: Communication 2. Major epochs and phases of manganese accumulation in the Earth's history』から |