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- W2360123950 abstract "The Dahebian-Gongxi superlarge barite deposits located in the southern margin of the Yangtze massif are the first world-class barite deposits. China is the largest producer of barite and has the largest barite ore reserves. The potential reserves of barite ores (470×10~6 tons) in the Dahebian-Gongxi barite ore field is more than total barite ore reserves of other countries (326×10~6 tons) in the world. Why did this non-conventional superlarge barite deposit occur in this area? This scientific question is worthwhile to be probed into. From the view of mineral-petrology, geochemistry and analysis of hydrothermal basin, geological and geochemical characteristics and environments of hydrothermal deposition for barite ores and related rocks have been discussed in this paper. Firstly, the third-order, fault-controlled basin may probably provide enough ore-hosted space for the superlarge barite deposits. The Tianzhu-Xinhuang-Yuping Cambrian sedimentary basins with hydrothermal deposition at large-scale occurred on the continental slope were probably the kind of fault-controlled sedimentary basin with hydrothermal deposition. Due to snysedimentary faulting, the Tianzhu-Xinhuang-Yuping Cambrian sedimentary basins were most likely cut into a series of sub-basins. The Dahebian-Bilin and Longbei-Tongpengai third-order basins were the tectonically located space coupled with ore-hosted space produced by the syn-faulting at the same time for the superlarge barite deposits. Secondly, a relatively stable sedimentary environment was likely answered for hydrothermal deposition at large-scale. The deposits hosted in the black shales, which are attached to the first rock unit of the Lower Cambrian Niutitang Group, were possibly formed in a deep-sea, euxinic environment. The ore-layers of barite in the study area were reasonably formed by syn-deposition of low-temperature (105-190℃) hydrothermal waters at large-scale on sea floor. Geochemical type of paleo-hydrothermal waters may attach to sulfosalt-type hydrothermal waters. Finally, the black shales overlying the barite layer that was formed in a high salinity, limited, reduced, stagnant deep-water basin were a better preservation for the deposits." @default.
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- W2360123950 date "2002-01-01" @default.
- W2360123950 modified "2023-09-23" @default.
- W2360123950 title "Geochemical characteristics of Dahebian-Gongxi superlarge barite deposits and analysis on its background of tectonic geology, China" @default.
- W2360123950 hasPublicationYear "2002" @default.
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