Thallium isotope variations in seawater and hydrogenetic, diagenetic, and hydrothermal ferromanganese deposits

Rehkämper, Mark; Frank, Martin; Hein, James R.; Porcelli, Don; Halliday, Alex N.; Ingri, Johan; Liebetrau, Volker

doi:10.1016/s0012-821x(02)00462-4

Cited by 187 publications

(174 citation statements)

References 45 publications

Supporting

Mentioning

165

Contrasting

Order By: Relevance

“…6 610 would imply that the full isotope fractionation factor (and hence that only vacancy sites are 611 utilized) should occur at solution concentrations below 0.080 g/g, which is more than three 612 orders of magnitude more concentrated than seawater. Thus, based on our data we would 613 predict essentially no variation in isotope fractionation during sorption of Tl from seawater 614 onto birnessite, which is consistent with the almost constant fractionation factor observed in 615 nature between hydrogenetic Fe-Mn crusts and seawater (Rehkämper et al, 2002). On the 616 other hand, given the mineralogical heterogeneity of manganese oxides in diagenetic and 617 hydrothermal Fe-Mn deposits (Burns and Burns, 1977), it is equally expected that Tl isotope 618 fractionation is highly variable in these types of Fe-Mn sediments (Peacock and Moon, 2012).…”

Section: Time and Temperature Dependent Experiments 433supporting

confidence: 67%

Towards an understanding of thallium isotope fractionation during adsorption to manganese oxides

Nielsen

Wasylenki

Rehkämper

et al. 2013

Geochimica et Cosmochimica Acta

Self Cite

105

View full text Add to dashboard Cite

show abstract

Section: Time and Temperature Dependent Experiments 433supporting

confidence: 67%

Towards an understanding of thallium isotope fractionation during adsorption to manganese oxides

Nielsen

Wasylenki

Rehkämper

et al. 2013

Geochimica et Cosmochimica Acta

Self Cite

105

View full text Add to dashboard Cite

show abstract

“…These sediments have much less extreme Tl isotope composition than previously investigated sediments (e.g., Rehkämper et al, 2002Rehkämper et al, , 2004 and altered crust from the Ocean Drilling Program Holes 504B, 896A…”

Section: Accepted M Manuscriptmentioning

confidence: 79%

“…In addition to orders of magnitude enrichment in Tl compared to igneous materials, low temperature oxidizing processes also can produce large Tl isotope fractionation (e.g., Coggon et al, 2014;Nielsen et al, 2006b;Rehkämper et al, 2002; 2004; see review in Nielsen et al, 2016b (Prytulak et al, 2013b). These sediments have much less extreme Tl isotope composition than previously investigated sediments (e.g., Rehkämper et al, 2002Rehkämper et al, , 2004 and altered crust from the Ocean Drilling Program Holes 504B, 896A…”

Section: Accepted M Manuscriptmentioning

confidence: 98%

Thallium elemental behavior and stable isotope fractionation during magmatic processes

et al. 2017

View full text Add to dashboard Cite

Please cite this article as: Prytulak, J., Brett, A., Webb, M., Plank, T., Rehkämper, M., Savage, P.S., Woodhead, J., Thallium elemental behavior and stable isotope fractionation during magmatic processes, Chemical Geology (2016), doi: 10.1016/j.chemgeo. 2016.11.007 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT AbstractStable thallium (Tl) isotopes are an extremely sensitive tracer for the addition of small amounts of sediments or materials altered at low temperatures to the source(s) of mantle-derived melts. The ability of Tl to trace such materials is due to the large concentration contrast between the mantle (Tl < 2ng/g) and possible exotic inputs (Tl ~100ng/g to >g/g), which also often display fractionated Tl isotope compositions.However, the magnitude of Tl isotope fractionation induced by igneous processes alone has not been systematically assessed. Here, two suites of co-genetic magmas, spanning a large range of differentiation, from Hekla, Iceland, and Anatahan, in the Mariana arc, are used to assess the behavior of thallium and its stable isotope variations during magmatic processes. Thallium behaves as a near-perfectly incompatible lithophile element throughout magmatic evolution, mirroring elements such as Rb, Cs, and K. Lavas from Hekla have restricted Cs/Tl ratios and stable Tl isotope compositions, which overlap with mantle estimates. Lavas from subductionrelated Anatahan volcano also have a restricted range in Tl isotope composition, which overlaps with Hekla and MORB, demonstrating that fractional crystallisation and partial melting does not fractionate stable Tl isotopes. Subduction environments display variable Cs/Tl, indicating that the subduction process commonly fractionates these two elements. The immunity of thallium stable isotopes to fractionation by magmatic processes coupled with its extreme sensitivity for tracing pelagic sediments, FeMn crusts and low temperature altered oceanic crust highlight its value in elucidating the nature of mantle sources of both oceanic basalts and arc lavas.Critically, meaningful interpretation of thallium isotope compositions need not be restricted to primitive lavas.

show abstract

“…Finally, we should note that mass-dependent (and even mass-independent) isotope fractionations of the order of 1 permil are being observed for other heavy elements (e.g., Hg, Bergquist and Blum 2007; Tl, Rehkamper et al 2002;U, Weyer et al 2008, Hiess et al 2012). Because there is no way to correct Pb isotope ratios for isotope fractionation in the complex multi-source ocean environment, the utility of developing Pb isotope precision much better than 1 permil may be questionable, but we should certainly strive to attain a precision of at least 1 permil.…”

Section: Pb Isotopesmentioning

confidence: 87%

GEOTRACES IC1 (BATS) contamination‐prone trace element isotopes Cd, Fe, Pb, Zn, Cu, and Mo intercalibration

Boyle

John

Abouchami

et al. 2012

Limnology & Ocean Methods

107

View full text Add to dashboard Cite

The stable isotope composition of radiogenic and natural elements provides a powerful tool for unraveling element sources and biogeochemical processes in the marine environment. Depending on the element, trace element isotope ratios can (1) narrow possible sources of the element in a sample and/or (given a temporal history boundary condition) constrain the time the when the element departed the ocean surface (e.g., Pb, Nd), (2) provide information on redox processes that the element is directly or indirectly involved in (e.g., Fe, Mo, Tl), (3) indicate the extent of biological uptake and/or ocean mixing of the element (e.g., Cd, Zn).However, these trace metals occur at picomolar to nanomolar concentrations, and precise stable isotope measurements require 100-1000 times more sample than required for concentration determination. AbstractWe report data on the isotopic composition of cadmium, copper, iron, lead, zinc, and molybdenum at the GEOTRACES IC1 BATS Atlantic intercalibration station. In general, the between lab and within-lab precisions are adequate to resolve global gradients and vertical gradients at this station for Cd, Fe, Pb, and Zn. Cd and Zn isotopes show clear variations in the upper water column and more subtle variations in the deep water; these variations are attributable, in part, to progressive mass fractionation of isotopes by Rayleigh distillation from biogenic uptake and/or adsorption. Fe isotope variability is attributed to heavier crustal dust and hydrothermal sources and light Fe from reducing sediments. Pb isotope variability results from temporal changes in anthropogenic source isotopic compositions and the relative contributions of U.S. and European Pb sources. Cu and Mo isotope variability is more subtle and close to analytical precision. Although the present situation is adequate for proceeding with GEOTRACES, it should be possible to improve the within-lab and between-lab precisions for some of these properties.

show abstract

Thallium isotope variations in seawater and hydrogenetic, diagenetic, and hydrothermal ferromanganese deposits

Cited by 187 publications

References 45 publications

Towards an understanding of thallium isotope fractionation during adsorption to manganese oxides

Towards an understanding of thallium isotope fractionation during adsorption to manganese oxides

Thallium elemental behavior and stable isotope fractionation during magmatic processes

GEOTRACES IC1 (BATS) contamination‐prone trace element isotopes Cd, Fe, Pb, Zn, Cu, and Mo intercalibration

Contact Info

Product

Resources

About