Occurrence of Magnetite in the Arkansas River Bed between Ford and Arkansas City

Sphar, Joe

doi:10.2307/3626425

Cited by 3 publications

(2 citation statements)

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“…However, SO4 2dominates in replacement order when SO4 2-/CO3 2is high and therefore will favor the formation of GR(SO4 2-) in saline water because of higher SO4 2contents. 88,96 In contrast to GR, magnetite has widespread occurrence in natural environments due to higher stability and has been identified in multiple locations such as in river bed sediments (USA), 97 in well-drained soils (UK, USA), 98,99 in semi-arid wetland soils (Israel), 100 in gleysol (Germany), 101 in Chinese loess and paleosols, 102 in tholeiitic basalt (Brazil), 103 in Proterozoic zoned carbonatites (India), 104 in sand fraction of deeply-weathered oxisol in savanna ecosystem (Brazil), 105 110 and in soils of a mofette field (Czech Republic). Recently, magnetite has been suggested to have also precipitated in early Archean ocean environments.…”

Section: Natural Environmentsmentioning

confidence: 99%

“…Keeping in view the order of preference for interlayer ions to replace each other (CO 3 2− > SO 4 2− > Cl − ), 95 Christiansen et al 88 contents. 88,96 In contrast to GR, magnetite has widespread occurrence in natural environments due to higher stability and has been identified in multiple locations such as in river bed sediments (USA), 97 in well-drained soils (UK, USA), 98,99 in semiarid wetland soils (Israel), 100 in gleysol (Germany), 101 in Chinese loess and paleosols, 102 in tholeiitic basalt (Brazil), 103 in Proterozoic zoned carbonatites (India), 104 in sand fraction of deeply weathered oxisol in savanna ecosystem (Brazil), 105 in alluvial soils near Fe−Pb mining site (Bulgaria), 106 in tropical lateritic soil profiles from southern India, 107 in sediments of three different Asian rivers draining into the South China Sea, 108 and in Fe-rich hydrocarbon contaminated soils and sediments from a former oil field (Germany) 109 and hydro- carbon-contaminated sediments form a former military air base 110 and in soils of a mofette field 90 (Czech Republic).…”

Section: Natural Environmentsmentioning

confidence: 99%

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Magnetite and Green Rust: Synthesis, Properties, and Environmental Applications of Mixed-Valent Iron Minerals

et al. 2018

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Mixed-valent iron [Fe(II)-Fe(III)] minerals such as magnetite and green rust have received a significant amount of attention over recent decades, especially in the environmental sciences. These mineral phases are intrinsic and essential parts of biogeochemical cycling of metals and organic carbon and play an important role regarding the mobility, toxicity, and redox transformation of organic and inorganic pollutants. The formation pathways, mineral properties, and applications of magnetite and green rust are currently active areas of research in geochemistry, environmental mineralogy, geomicrobiology, material sciences, environmental engineering, and environmental remediation. These aspects ultimately dictate the reactivity of magnetite and green rust in the environment, which has important consequences for the application of these mineral phases, for example in remediation strategies. In this review we discuss the properties, occurrence, formation by biotic as well as abiotic pathways, characterization techniques, and environmental applications of magnetite and green rust in the environment. The aim is to present a detailed overview of the key aspects related to these mineral phases which can be used as an important resource for researchers working in a diverse range of fields dealing with mixed-valent iron minerals.

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