Results 11 to 20 of about 4,997 (224)
Yankuang ceshi, 2022 BACKGROUND Phosphate deposit of the Ediacaran Doushantuo Formation in Guizhou province is a typical representative of the global phosphorite formation event in the late Neoproterozoic, which is closely related to climate change and evolution of life ...
LI Xuanbo +4 more
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Journal of Economic Geology, 2021 Introduction Phosphorites are marine sediments of biogenic origin containing 15–20 wt% P2O5 and between 50 and 120 ppm U (Boggs, 2009; Tzifas et al., 2014; Zarasvandi et al., 2019).
Alireza Zarasvandi +3 more
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Upper Ordovician hardgrounds – from localized surfaces to global biogeochemical events [PDF]
Estonian Journal of Earth Sciences, 2023 Upper Ordovician hardgrounds display a spectrum of complexity reflecting a range of local to global-scale processes. Hardgrounds are cemented seafloor surfaces typically marked by the presence of encrusting taxa and borings.
Timothy R. Paton +4 more
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Dizhi lixue xuebao, 2023 The lower Cambrian Maidiping formation in the Mabian area of southern Sichuan is a crucial ore-bearing horizon for Kunyang-style phosphate ores. The sedimentary paleoenvironment controls the distribution of phosphate ore.
LI Zuoqiang +5 more
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Synoptic view on P ore beneficiation techniques
Alexandria Engineering Journal, 2022 Phosphorite mineral is the most important natural source of phosphorus (P) which has several applications in agriculture (as fertilizers), pottery, and animal feed.
Muhammad Sajid +8 more
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Deterioration mechanism of mechanical properties of phosphorite under different saturation duration
Frontiers in Earth Science, 2023 In order to explore the deterioration mechanism of mechanical properties of phosphate rock under different saturation time, the degradation mechanism of phosphoric rock samples under different saturation duration was analyzed by laboratory test ...
Shujian Li +7 more
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FAST DETERMINATION OF THE SULFUR SPECIES IN SOLID PHASE SYSTEMS BY A TPO-IR METHOD [PDF]
Química Nova, 2021 Qualitative and quantitative assessment of total sulfur and sulfur species in solid phase is necessarily important for development of effective desulfurization methods, reduction of environmental pollution, and prevention of catalyst poisoned.
Shiyun Tang +4 more
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The Monterey event in the Mediterranean: A record from shelf sediments of Malta [PDF]
, 1996 Oligo-Miocene carbonate platform and shelf sediments outcropping on the Maltese Islands provide an excellent archive of the paleoceanography of the central Mediterranean.
Jacobs, E +3 more
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Stratigraphy of the Khuvsgul Group, Mongolia
Mongolian Geoscientist, 2021 The Khuvsgul Group (Khuvsgul Province, Mongolia) is a Late Neoproterozoic to Cambrian carbonate-dominated succession that includes minor glacial diamictite and one of the largest known ore-grade phosphate deposits in the world.
Eliel Anttila +2 more
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Processing of phosphorites and additives with researching their thermodynamical properties [PDF]
E3S Web of Conferences, 2023 In this article, scientific research on the production of thermophosphate fertilizers was carried out on the basis of thermo-alkaline activation of Central Kyzylkum waste phosphorite with mineralized mass and alkali metal salts, namely NaCl, KCl, Na2SO4,
Akhtamova Maftuna +4 more
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