The Zr/Hf ratio as a fractionation indicator of rare-metal granites

Zaraisky, G. P.; Aksyuk, A. M.; Devyatova, V. N.; Удоратина, О. В.; Chevychelov, V. Yu.

doi:10.1134/s0869591109010020

Cited by 99 publications

(26 citation statements)

References 4 publications

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“…Such a trend shows non-CHARAC (CHARge-and-RAdiusControlled) behaviour of these two elements (e.g. Bau, 1996;Irber, 1999;Jahn et al, 2001), and is also comparable to Zr/Hf evolution in many granitic intrusions (Zaraisky et al, 2009;Linnen and Keppler, 2002). Apart from fractional crystallisation, some authors also ascribe Zr/Hf decrease to fluid-melt interaction or preferential mobility of Hf in hydrothermal environments (Č ernŷ et al, 1985;Bau, 1996;Irber, 1999;Jahn et al, 2001;Zhao et al, 2002).…”

Section: High-field-strength Elementsmentioning

confidence: 85%

A topaz- and amazonite-bearing leucogranite pluton in eastern Xinjiang, NW China and its zoning

Zunzhong

et al. 2011

Journal of Asian Earth Sciences

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Section: High-field-strength Elementsmentioning

confidence: 85%

A topaz- and amazonite-bearing leucogranite pluton in eastern Xinjiang, NW China and its zoning

Zunzhong

et al. 2011

Journal of Asian Earth Sciences

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“…Crystallization of zircon in granitic magma would deplete the concentrations of both Zr and Hf in the melt due to their similar partition coefficients and identical twin behavior (Wang et al, 2010). However, the Zr/Hf ratio decreases in the series of mafic (gabbro) to felsic (granite) rocks (Brooks, 1970;Gulson, 1971) due to high degree of magmatic differentiation (Irber, 1999;Wang et al, 2010) and fractional crystallization (Zaraisky et al, 2008(Zaraisky et al, , 2009). The Zr/Hf ratio in MG and DG have quite similar values without any significant correlation indicates that Zr and Hf were fractionated through a common type of crystallization process and mainly controlled during zircon formation (Hanchar and Watson, 2003).…”

Section: Zr/hf Ratiosmentioning

confidence: 95%

Comparative petrogenesis and tectonics of Paleoproterozoic Malanjkhand and Dongargarh granitoids, Central India

Pandit¹,

Panigrahi²

2012

Journal of Asian Earth Sciences

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“…The ratio of Zr to other metals like Hf or Ti is highly useful to determine the crystallization sequences of rocks (Zaraisky et al 2009 ) . Therefore, Zr/Hf and Ti/Zr concentration ratios are employed to trace possible precursor rock(s) that exist in ores (Kurtz et al 2000 ;Zaraisky et al 2008Zaraisky et al , 2009Hao et al 2010 ;Bern et al 2011 ) . The ratios of immobile elements (e.g., Ti/Zr) in bauxite are similar to those of the parent rock (Valeton et al 1987 ) and can be used to determine source rocks (Calagari and Abedini 2007 ) .…”

Section: Retention Mobility and Bioavailability Of Zr In Soilsmentioning

confidence: 99%

Behavior and Impact of Zirconium in the Soil–Plant System: Plant Uptake and Phytotoxicity

Shahid

Ferrand

Schreck

et al. 2012

Reviews of Environmental Contamination and Toxicology Volume 221

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Zirconium (Zr) is a transition metal that has both stable and radioactive isotopes.This metal has gained significant attention as a major pollutant of concern, partly because it has been prominent in the debate concerning the growing anthropogenic pressure on the environment. Its numerous past and present uses have induced significant soil and water pollution. Zr is generally considered to have low mobility in soils. The behavior of Zr particularly depends on the characteristics of the media in which it exists, and even its presence in the biosphere as a contaminate may affect its behavior. In this chapter, we describe the relationship between the behavior of Zrand its speciation in soils, its uptake and accumulation by plants, its translocation and toxicity inside plants, and mechanisms by which plants detoxify it.Zr is abundant and occurs naturally in the earth's crust. Zr emissions to the atmosphere are increasing from anthropogenic activities such as its use in industry and nuclear reactors. Zr forms various complexes with soil components, which reduces its soil mobility and phytoavailabilty. The mobility and phytoavailabilty of Zr in soil depend on its speciation and the physicochemical properties of soil that include soil pH, texture, and organic contents. Despite having low soil mobility and phytoavailability,amounts of Zr are absorbed by plants, mainly through the root system and can thereby enter the food chain.After plant uptake, Zr mainly accumulates in root cells. Zr does not have any known essential function in plant or animal metabolism. Although little published data are available, we conclude that the phytotoxicity of Zr is generally low.Notwithstanding, Zr can significantly reduce plant growth and can affect plantenzyme activity. When exposed to Zr-induced toxicity, plants possess numerous defense mechanisms to cope with the toxicity. Such strategies include Zr sequestration in plant roots and activation of various antioxidants. Because Zr may have impact on the biosphere, we believe it deserves to be evaluated in supplementary studies that will enhance the understanding of its behavior in soil-plant systems.

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The Zr/Hf ratio as a fractionation indicator of rare-metal granites

Cited by 99 publications

References 4 publications

A topaz- and amazonite-bearing leucogranite pluton in eastern Xinjiang, NW China and its zoning

A topaz- and amazonite-bearing leucogranite pluton in eastern Xinjiang, NW China and its zoning

Comparative petrogenesis and tectonics of Paleoproterozoic Malanjkhand and Dongargarh granitoids, Central India

Behavior and Impact of Zirconium in the Soil–Plant System: Plant Uptake and Phytotoxicity

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