Non-Traditional Stable Isotopes: Retrospective and Prospective

Teng, Fang‐Zhen; Dauphas, N.; Watkins, James M.

doi:10.2138/rmg.2017.82.1

Cited by 196 publications

(67 citation statements)

References 152 publications

(177 reference statements)

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“…The isotopic compositions reported here use the mu (m) notation, 53 which represents part-per-million deviations in the Zr isotopic composition of our samples relative to the Zr NIST isotopic standard according to eqn (5):…”

Section: Primary Isotopic Reference Materials and Data Reportingmentioning

confidence: 99%

Zirconium stable isotope analysis of zircon by MC-ICP-MS: methods and application to evaluating intra-crystalline zonation in a zircon megacryst

Tompkins

Zieman

Ibáñez-Mejía

et al. 2020

J. Anal. At. Spectrom.

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Section: Primary Isotopic Reference Materials and Data Reportingmentioning

confidence: 99%

Zirconium stable isotope analysis of zircon by MC-ICP-MS: methods and application to evaluating intra-crystalline zonation in a zircon megacryst

Tompkins

Zieman

Ibáñez-Mejía

et al. 2020

J. Anal. At. Spectrom.

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“…In contrast to igneous rocks that have very limited Mg isotopic variability due to the lack of significant Mg isotope fractionation during fractional crystallization processes (Teng et al, 2010), natural carbonates, including aragonite, calcite, dolomite and magnesite, have remarkably low and variable δ 26 Mg values, which range from ca. -1‰ to -5‰ (Saenger and Wang, 2014;Teng 2017b). Almost all carbonates of modern marine origin have δ 26 Mg values that are lower than that of seawater (δ 26 Mg seawater ≈ -0.8‰; Ling et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Carbonate is ubiquitous on Earth, and its element and C-O-Sr isotope compositions have been extensively used to study paleo-environments (Cao et al, 2008;Song et al, 2015), dolomitization (Haas et al, 2014;Ronchi et al, 2011) and diagenetic processes (Kolchugin et al, 2016;Mathieu et al, 2015). Magnesium is an important component in most carbonate rocks, and advances in multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) since 2000s have enabled high precision Mg isotope analyses, which led to an explosion of studies on Mg isotope geochemistry of carbonates (e.g., Galy et al, 2002;Young and Galy, 2004;Saenger and Wang, 2014;Teng et al, 2017aTeng et al, , 2017b.…”

Section: Introductionmentioning

confidence: 99%

Resetting of Mg isotopes between calcite and dolomite during burial metamorphism: Outlook of Mg isotopes as geothermometer and seawater proxy

Wang

et al. 2017

Geochimica et Cosmochimica Acta

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Magnesium isotopes are an emerging tool to study the geological processes recorded in carbonates. Calcite, due to its ubiquitous occurrence and the large Mg isotope fractionation associated with the mineral, has attracted great interests in applications of Mg isotope geochemistry. However, the fidelity of Mg isotopes in geological records of carbonate minerals (e.g., calcite and dolomite) against burial metamorphism remains poorly constrained. Here we report our investigation on the Mg isotope systematics of a dolomitized Middle Triassic Geshan carbonate section in eastern China. Magnesium isotope analysis was complemented by analyses of Sr-CO isotopic compositions, major and trace element concentrations, and petrographic and mineralogical features. Multiple lines of evidence consistently indicated that post-depositional diagenesis of carbonate minerals occurred to the carbonate rocks. Magnesium isotope compositions of the carbonate rocks closely follow a mixing trend between a high δ 26 Mg dolomite end member and a low δ 26 Mg calcite end member, irrespective of sample positions in the section and calcite/dolomite ratio in the samples. By fitting the measured Mg isotope data using a two-end member mixing model, an inter-mineral Δ 26 Mg dolomite-calcite fractionation of 0.72‰ was obtained. Based on the experimentally derived Mg isotope fractionation factors for dolomite and calcite, a temperature of 150-190ºC was calculated to correspond to the 0.72‰ Δ 26 Mg dolomite-calcite fractionation. Such temperature range matches with the burial-thermal history of the local strata, making a successful case of Mg isotope geothermometry. Our results indicate that both calcite and dolomite had been re-equilibrated during burial metamorphism, and based on isotope mass

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“…The effects of oxidative weathering on elemental mobility are also an important consideration for environmental impact studies. Improvements in analytical techniques in recent decades have enabled stable isotope analysis for elements spanning the periodic table (e.g., Bullen, 2012Bullen, , 2014Wiederhold, 2015;Teng et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Thallium concentration and thallium isotope composition of lateritic terrains

Howarth

Prytulak

Little

et al. 2018

Geochimica et Cosmochimica Acta

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Non-Traditional Stable Isotopes: Retrospective and Prospective

Cited by 196 publications

References 152 publications

Zirconium stable isotope analysis of zircon by MC-ICP-MS: methods and application to evaluating intra-crystalline zonation in a zircon megacryst

Zirconium stable isotope analysis of zircon by MC-ICP-MS: methods and application to evaluating intra-crystalline zonation in a zircon megacryst

Resetting of Mg isotopes between calcite and dolomite during burial metamorphism: Outlook of Mg isotopes as geothermometer and seawater proxy

Thallium concentration and thallium isotope composition of lateritic terrains

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