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Journal articles on the topic 'Copper isotope fractionation'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Navarrete, Jesica U., Marian Viveros, Joanne T. Ellzey, and David M. Borrok. "Copper isotope fractionation by desert shrubs." Applied Geochemistry 26 (June 2011): S319—S321. http://dx.doi.org/10.1016/j.apgeochem.2011.04.002.

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2

Balter, Vincent, Andre Nogueira da Costa, Victor Paky Bondanese, Klervia Jaouen, Aline Lamboux, Suleeporn Sangrajrang, Nicolas Vincent, et al. "Natural variations of copper and sulfur stable isotopes in blood of hepatocellular carcinoma patients." Proceedings of the National Academy of Sciences 112, no. 4 (January 12, 2015): 982–85. http://dx.doi.org/10.1073/pnas.1415151112.

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The widespread hypoxic conditions of the tumor microenvironment can impair the metabolism of bioessential elements such as copper and sulfur, notably by changing their redox state and, as a consequence, their ability to bind specific molecules. Because competing redox state is known to drive isotopic fractionation, we have used here the stable isotope compositions of copper (65Cu/63Cu) and sulfur (34S/32S) in the blood of patients with hepatocellular carcinoma (HCC) as a tool to explore the cancer-driven copper and sulfur imbalances. We report that copper is 63Cu-enriched by ∼0.4‰ and sulfur is 32S-enriched by ∼1.5‰ in the blood of patients compared with that of control subjects. As expected, HCC patients have more copper in red blood cells and serum compared with control subjects. However, the isotopic signature of this blood extra copper burden is not in favor of a dietary origin but rather suggests a reallocation in the body of copper bound to cysteine-rich proteins such as metallothioneins. The magnitude of the sulfur isotope effect is similar in red blood cells and serum of HCC patients, implying that sulfur fractionation is systemic. The 32S-enrichment of sulfur in the blood of HCC patients is compatible with the notion that sulfur partly originates from tumor-derived sulfides. The measurement of natural variations of stable isotope compositions, using techniques developed in the field of Earth sciences, can provide new means to detect and quantify cancer metabolic changes and provide insights into underlying mechanisms.

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3

Kimball, B. E., R. Mathur, A. C. Dohnalkova, A. J. Wall, R. L. Runkel, and S. L. Brantley. "Copper isotope fractionation in acid mine drainage." Geochimica et Cosmochimica Acta 73, no. 5 (March 2009): 1247–63. http://dx.doi.org/10.1016/j.gca.2008.11.035.

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4

Asael, Dan, Alan Matthews, Miryam Bar-Matthews, and Ludwik Halicz. "Copper isotope fractionation in sedimentary copper mineralization (Timna Valley, Israel)." Chemical Geology 243, no. 3-4 (September 2007): 238–54. http://dx.doi.org/10.1016/j.chemgeo.2007.06.007.

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5

Ellwood, Michael J., Robert Strzepek, Xiaoyu Chen, Thomas W. Trull, and Philip W. Boyd. "Some observations on the biogeochemical cycling of zinc in the Australian sector of the Southern Ocean: a dedication to Keith Hunter." Marine and Freshwater Research 71, no. 3 (2020): 355. http://dx.doi.org/10.1071/mf19200.

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In this study we investigated the distribution of dissolved and particulate zinc (dZn and pZn respectively) and its isotopes in the Subantarctic Zone as part of a Geotraces Process voyage. dZn and pZn depth profiles contrasted each other, with dZn showing depletion within the euphotic zone while pZn profiles showed enrichment. Fitting a power law equation to the pZn profiles produced an attenuation factor of 0.82, which contrasted values for particulate phosphorus, cadmium and copper. The results indicate that zinc has a longer regeneration length scale than phosphorus and cadmium, but shorter than copper. The differential regeneration of pZn relative to that of particulate phosphorus likely explains why dZn appears to have a deeper regeneration profile than that of phosphate. The dZn isotope (δ66Zndissolved) profiles collected across the Subantarctic Zone showed differing profile structures. For one station collected within an isolated cold-core eddy (CCE), δ66Zndissolved showed surface enrichment relative to deep waters. The corresponding pZn isotope profiles within the CCE did not show enrichment; rather, they were subtly depleted in surface waters and then converged to similar values at depth. Zinc isotope fractionation can be explained through a combination of fractionation processes associated with uptake by phytoplankton, zinc complexation by natural organic ligands and zinc regeneration from particulate matter.

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6

Miller, Kerri A., Fernando A. Vicentini, Simon A. Hirota, Keith A. Sharkey, and Michael E. Wieser. "Antibiotic treatment affects the expression levels of copper transporters and the isotopic composition of copper in the colon of mice." Proceedings of the National Academy of Sciences 116, no. 13 (March 8, 2019): 5955–60. http://dx.doi.org/10.1073/pnas.1814047116.

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Copper is a critical enzyme cofactor in the body but also a potent cellular toxin when intracellularly unbound. Thus, there is a delicate balance of intracellular copper, maintained by a series of complex interactions between the metal and specific copper transport and binding proteins. The gastrointestinal (GI) tract is the primary site of copper entry into the body and there has been considerable progress in understanding the intricacies of copper metabolism in this region. The GI tract is also host to diverse bacterial populations, and their role in copper metabolism is not well understood. In this study, we compared the isotopic fractionation of copper in the GI tract of mice with intestinal microbiota significantly depleted by antibiotic treatment to that in mice not receiving such treatment. We demonstrated variability in copper isotopic composition along the length of the gut. A significant difference, ∼1.0‰, in copper isotope abundances was measured in the proximal colon of antibiotic-treated mice. The changes in copper isotopic composition in the colon are accompanied by changes in copper transporters. Both CTR1, a copper importer, and ATP7A, a copper transporter across membranes, were significantly down-regulated in the colon of antibiotic-treated mice. This study demonstrated that isotope abundance measurements of metals can be used as an indicator of changes in metabolic processes in vivo. These measurements revealed a host–microbial interaction in the GI tract involved in the regulation of copper transport.

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7

Bigalke, Moritz, Stefan Weyer, and Wolfgang Wilcke. "Copper Isotope Fractionation during Complexation with Insolubilized Humic Acid." Environmental Science & Technology 44, no. 14 (July 15, 2010): 5496–502. http://dx.doi.org/10.1021/es1017653.

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8

Coutaud, Margot, Merlin Méheut, Jérôme Viers, Jean-Luc Rols, and Oleg S. Pokrovsky. "Copper isotope fractionation during excretion from a phototrophic biofilm." Chemical Geology 513 (May 2019): 88–100. http://dx.doi.org/10.1016/j.chemgeo.2019.02.031.

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9

He, Lianhua, Jihua Liu, Hui Zhang, Jingjing Gao, Aimei Zhu, and Ying Zhang. "Copper and zinc isotope variations in ferromanganese crusts and their isotopic fractionation mechanism." Acta Oceanologica Sinica 40, no. 9 (September 2021): 43–52. http://dx.doi.org/10.1007/s13131-021-1775-5.

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10

Wall, Andrew J., Peter J. Heaney, Ryan Mathur, Jeffrey E. Post, Jonathan C. Hanson, and Peter J. Eng. "A flow-through reaction cell that couples time-resolved X-ray diffraction with stable isotope analysis." Journal of Applied Crystallography 44, no. 2 (February 2, 2011): 429–32. http://dx.doi.org/10.1107/s0021889811000525.

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A non-metallic flow-through reaction cell is described, designed forin situtime-resolved X-ray diffraction coupled with stable isotope analysis. The experimental setup allows the correlation of Cu isotope fractionation with changes in crystal structure during copper sulfide dissolution. This flow-through cell can be applied to many classes of fluid–mineral reactions that involve dissolution or ion exchange.

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11

Ni, Peng, Catherine A. Macris, Emilee A. Darling, and Anat Shahar. "Evaporation-induced copper isotope fractionation: Insights from laser levitation experiments." Geochimica et Cosmochimica Acta 298 (April 2021): 131–48. http://dx.doi.org/10.1016/j.gca.2021.02.007.

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12

Ryan, Brooke M., Jason K. Kirby, Fien Degryse, Kathleen Scheiderich, and Mike J. McLaughlin. "Copper Isotope Fractionation during Equilibration with Natural and Synthetic Ligands." Environmental Science & Technology 48, no. 15 (July 11, 2014): 8620–26. http://dx.doi.org/10.1021/es500764x.

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13

Mathur, Ryan, Spencer Titley, Fernando Barra, Susan Brantley, Marc Wilson, Allison Phillips, Francisco Munizaga, Victor Maksaev, Jeff Vervoort, and Garret Hart. "Exploration potential of Cu isotope fractionation in porphyry copper deposits." Journal of Geochemical Exploration 102, no. 1 (July 2009): 1–6. http://dx.doi.org/10.1016/j.gexplo.2008.09.004.

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14

Reich, Martin, Jaime D. Barnes, Daniel O. Breecker, Fernando Barra, Catalina Milojevic, and Dana L. Drew. "Chlorine isotope fractionation recorded in atacamite during supergene copper oxidation." Chemical Geology 525 (October 2019): 168–76. http://dx.doi.org/10.1016/j.chemgeo.2019.07.023.

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15

Liu, Shanqi, Yongbing Li, Jie Liu, Zhiming Yang, Jianming Liu, and Yaolin Shi. "Equilibrium Cu isotope fractionation in copper minerals: a first-principles study." Chemical Geology 564 (March 2021): 120060. http://dx.doi.org/10.1016/j.chemgeo.2021.120060.

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16

Li, Dandan, Sheng-Ao Liu, and Shuguang Li. "Copper isotope fractionation during adsorption onto kaolinite: Experimental approach and applications." Chemical Geology 396 (March 2015): 74–82. http://dx.doi.org/10.1016/j.chemgeo.2014.12.020.

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17

Navarrete, Jesica U., David M. Borrok, Marian Viveros, and Joanne T. Ellzey. "Copper isotope fractionation during surface adsorption and intracellular incorporation by bacteria." Geochimica et Cosmochimica Acta 75, no. 3 (February 2011): 784–99. http://dx.doi.org/10.1016/j.gca.2010.11.011.

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18

Zeng, Zhigang, Xiaohui Li, Shuai Chen, Yuxiang Zhang, Zuxing Chen, and Chen-Tung Arthur Chen. "Iron-Copper-Zinc Isotopic Compositions of Andesites from the Kueishantao Hydrothermal Field off Northeastern Taiwan." Sustainability 14, no. 1 (December 29, 2021): 359. http://dx.doi.org/10.3390/su14010359.

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The studies of iron (Fe), copper (Cu), and zinc (Zn) isotopic compositions in seafloor andesites are helpful in understanding the metal stable isotope fractionation during magma evolution. Here, the Fe, Cu, and Zn isotopic compositions of andesites from the Kueishantao hydrothermal field (KHF) off northeastern Taiwan, west Pacific, have been studied. The majority of δ56Fe values (+0.02‰ to +0.11‰) in the KHF andesites are consistent with those of MORBs (mid-ocean ridge basalts). This suggests that the Fe in the KHF andesites is mainly from a MORB-type mantle. The Fe-Cu-Zn isotopic compositions (δ56Fe +0.22‰, δ65Cu +0.16‰ to +0.64‰, and δ66Zn +0.29‰ to +0.71‰) of the KHF andesites, which are significantly different from those of the MORBs and the continental crust (CC), have a relatively wide range of Cu and Zn isotopic compositions. This is most likely to be a result of the entrainment of the sedimentary carbonate-derived components into an andesitic magma. The recycled altered rocks (higher δ56Fe, lower δ66Zn) could preferentially incorporate isotopically light Fe and heavy Zn into the magma, resulting in relative enrichment of the lighter Fe and heavier Zn isotopes in the andesites. The majority of the δ56Fe values in the KHF andesites are higher than those of the sediments and the local CC and lower than those of the subducted altered rocks, while the reverse is true for δ66Zn, suggesting that the subseafloor sediments and CC materials (lower δ56Fe, higher δ66Zn) contaminating the rising andesitic magma could preferentially incorporate isotopically heavy Fe and light Zn into the magma, resulting in relative enrichment of the heavier Fe and lighter Zn isotopes in the andesites. Thus, the characteristics of the Fe and Zn isotopes in back-arc and island-arc volcanic rocks may also be influenced by the CC and plate subduction components.

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19

Klein, S., and T. Rose. "Evaluating copper isotope fractionation in the metallurgical operational chain: An experimental approach." Archaeometry 62, S1 (May 4, 2020): 134–55. http://dx.doi.org/10.1111/arcm.12564.

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20

Mathur, Ryan, Spencer Titley, Garret Hart, Marc Wilson, Michael Davignon, and Caitlan Zlatos. "The history of the United States cent revealed through copper isotope fractionation." Journal of Archaeological Science 36, no. 2 (February 2009): 430–33. http://dx.doi.org/10.1016/j.jas.2008.09.029.

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21

Asadi, Sina, Ryan Mathur, Farid Moore, and Alireza Zarasvandi. "Copper isotope fractionation in the Meiduk porphyry copper deposit, Northwest of Kerman Cenozoic magmatic arc, Iran." Terra Nova 27, no. 1 (December 3, 2014): 36–41. http://dx.doi.org/10.1111/ter.12128.

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22

Coplen, Tyler B., John Karl Böhlke, P. De Bièvre, T. Ding, N. E. Holden, J. A. Hopple, H. R. Krouse, et al. "Isotope-abundance variations of selected elements (IUPAC Technical Report)." Pure and Applied Chemistry 74, no. 10 (January 1, 2002): 1987–2017. http://dx.doi.org/10.1351/pac200274101987.

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Documented variations in the isotopic compositions of some chemical elements are responsible for expanded uncertainties in the standard atomic weights published by the Commission on Atomic Weights and Isotopic Abundances of the International Union of Pure and Applied Chemistry. This report summarizes reported variations in the isotopic compositions of 20 elements that are due to physical and chemical fractionation processes (not due to radioactive decay) and their effects on the standard atomic-weight uncertainties. For 11 of those elements (hydrogen, lithium, boron, carbon, nitrogen, oxygen, silicon, sulfur, chlorine, copper, and selenium), standard atomic-weight uncertainties have been assigned values that are substantially larger than analytical uncertainties because of common isotope-abundance variations in materials of natural terrestrial origin. For 2 elements (chromium and thallium), recently reported isotope-abundance variations potentially are large enough to result in future expansion of their atomic-weight uncertainties. For 7 elements (magnesium, calcium, iron, zinc, molybdenum, palladium, and tellurium), documented isotope variations in materials of natural ter- restrial origin are too small to have a significant effect on their standard atomic-weight uncertainties. This compilation indicates the extent to which the atomic weight of an element in a given material may differ from the standard atomic weight of the element. For most elements given above, data are graphically illustrated by a diagram in which the materials are specified in the ordinate and the compositional ranges are plotted along the abscissa in scales of (1) atomic weight, (2) mole fraction of a selected isotope, and (3) delta value of a selected isotope ratio.

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23

Li, Dandan, and Sheng-Ao Liu. "Copper Isotope Fractionation during Basalt Leaching at 25 °C and pH = 0.3, 2." Journal of Earth Science 33, no. 1 (February 2022): 82–91. http://dx.doi.org/10.1007/s12583-021-1499-7.

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24

Fujii, Toshiyuki, Frédéric Moynier, Minori Abe, Keisuke Nemoto, and Francis Albarède. "Copper isotope fractionation between aqueous compounds relevant to low temperature geochemistry and biology." Geochimica et Cosmochimica Acta 110 (June 2013): 29–44. http://dx.doi.org/10.1016/j.gca.2013.02.007.

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25

Liu, Sheng-Ao, Fang-Zhen Teng, Shuguang Li, Gang-Jian Wei, Jing-Long Ma, and Dandan Li. "Copper and iron isotope fractionation during weathering and pedogenesis: Insights from saprolite profiles." Geochimica et Cosmochimica Acta 146 (December 2014): 59–75. http://dx.doi.org/10.1016/j.gca.2014.09.040.

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26

Bondanese, Victor P., Aline Lamboux, Melanie Simon, Jérôme E. Lafont, Emmanuelle Albalat, Sylvain Pichat, Jean-Marc Vanacker, et al. "Hypoxia induces copper stable isotope fractionation in hepatocellular carcinoma, in a HIF-independent manner." Metallomics 8, no. 11 (2016): 1177–84. http://dx.doi.org/10.1039/c6mt00102e.

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27

Ehrlich, S., I. Butler, L. Halicz, D. Rickard, A. Oldroyd, and Alan Matthews. "Experimental study of the copper isotope fractionation between aqueous Cu(II) and covellite, CuS." Chemical Geology 209, no. 3-4 (September 2004): 259–69. http://dx.doi.org/10.1016/j.chemgeo.2004.06.010.

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28

Wang, Rui-Rui, Hui-Min Yu, Wen-Han Cheng, Yu-Chen Liu, Gan-Lin Zhang, De-Cheng Li, and Fang Huang. "Copper migration and isotope fractionation in a typical paddy soil profile of the Yangtze Delta." Science of The Total Environment 821 (May 2022): 153201. http://dx.doi.org/10.1016/j.scitotenv.2022.153201.

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29

Zhao, Yun, Chunji Xue, Sheng-Ao Liu, David T. A. Symons, Xiaobo Zhao, Yongqiang Yang, and Junjun Ke. "Copper isotope fractionation during sulfide-magma differentiation in the Tulaergen magmatic Ni–Cu deposit, NW China." Lithos 286-287 (August 2017): 206–15. http://dx.doi.org/10.1016/j.lithos.2017.06.007.

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30

Pérez Rodríguez, Nathalie, Emma Engström, Ilia Rodushkin, Peter Nason, Lena Alakangas, and Björn Öhlander. "Copper and iron isotope fractionation in mine tailings at the Laver and Kristineberg mines, northern Sweden." Applied Geochemistry 32 (May 2013): 204–15. http://dx.doi.org/10.1016/j.apgeochem.2012.10.012.

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31

Asael, Dan, Alan Matthews, Slawomir Oszczepalski, Miryam Bar-Matthews, and Ludwik Halicz. "Fluid speciation controls of low temperature copper isotope fractionation applied to the Kupferschiefer and Timna ore deposits." Chemical Geology 262, no. 3-4 (May 2009): 147–58. http://dx.doi.org/10.1016/j.chemgeo.2009.01.015.

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32

Lv, Yiwen, Sheng-Ao Liu, Jian-Ming Zhu, and Shuguang Li. "Copper and zinc isotope fractionation during deposition and weathering of highly metalliferous black shales in central China." Chemical Geology 422 (March 2016): 82. http://dx.doi.org/10.1016/j.chemgeo.2015.12.017.

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33

Lv, Yiwen, Sheng-Ao Liu, Jian-Ming Zhu, and Shuguang Li. "Copper and zinc isotope fractionation during deposition and weathering of highly metalliferous black shales in central China." Chemical Geology 445 (December 2016): 24–35. http://dx.doi.org/10.1016/j.chemgeo.2016.01.016.

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34

Maher, K. C., and P. B. Larson. "Variation in Copper Isotope Ratios and Controls on Fractionation in Hypogene Skarn Mineralization at Coroccohuayco and Tintaya, Peru." Economic Geology 102, no. 2 (March 1, 2007): 225–37. http://dx.doi.org/10.2113/gsecongeo.102.2.225.

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35

Araújo, Daniel F., Emmanuel Ponzevera, Nicolas Briant, Joël Knoery, Sandrine Bruzac, Teddy Sireau, Anne Pellouin-Grouhel, and Christophe Brach-Papa. "Differences in Copper Isotope Fractionation Between Mussels (Regulators) and Oysters (Hyperaccumulators): Insights from a Ten-Year Biomonitoring Study." Environmental Science & Technology 55, no. 1 (December 11, 2020): 324–30. http://dx.doi.org/10.1021/acs.est.0c04691.

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36

Pokrovsky, O. S., J. Viers, E. E. Emnova, E. I. Kompantseva, and R. Freydier. "Copper isotope fractionation during its interaction with soil and aquatic microorganisms and metal oxy(hydr)oxides: Possible structural control." Geochimica et Cosmochimica Acta 72, no. 7 (April 2008): 1742–57. http://dx.doi.org/10.1016/j.gca.2008.01.018.

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37

WANG, Yue, and Xiangkun ZHU. "Copper Isotope Fractionation during Porphyry and Skarn-type Metallogeny: A Case Study of Tongling District in the Middle-Lower Yangtze Valley." Acta Geologica Sinica - English Edition 88, s2 (December 2014): 1578–79. http://dx.doi.org/10.1111/1755-6724.12384_14.

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38

Elsner, Martin, David M. Cwiertny, A. Lynn Roberts, and Barbara Sherwood Lollar. "1,1,2,2-Tetrachloroethane Reactions with OH-, Cr(II), Granular Iron, and a Copper−Iron Bimetal: Insights from Product Formation and Associated Carbon Isotope Fractionation." Environmental Science & Technology 41, no. 11 (June 2007): 4111–17. http://dx.doi.org/10.1021/es063040x.

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39

Huang, Jian, Fang Huang, Zaicong Wang, Xingchao Zhang, and Huimin Yu. "Copper isotope fractionation during partial melting and melt percolation in the upper mantle: Evidence from massif peridotites in Ivrea-Verbano Zone, Italian Alps." Geochimica et Cosmochimica Acta 211 (August 2017): 48–63. http://dx.doi.org/10.1016/j.gca.2017.05.007.

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40

Noubactep, C. "Comment on “1,1,2,2-Tetrachloroethane Reactions with OH-, Cr(II), Granular Iron, and a Copper−Iron Bimetal: Insights from Product Formation and Associated Carbon Isotope Fractionation”." Environmental Science & Technology 41, no. 22 (November 2007): 7947–48. http://dx.doi.org/10.1021/es071678i.

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41

Elsner, Martin, David M. Cwiertny, A. Lynn Roberts, and Barbara Sherwood Lollar. "Response to Comment on “1,1,2,2-Tetrachloroethane Reactions with OH-, Cr(II), Granular Iron, and a Copper−Iron Bimetal: Insights from Product Formation and Associated Carbon Isotope Fractionation”." Environmental Science & Technology 41, no. 22 (November 2007): 7949–50. http://dx.doi.org/10.1021/es072046z.

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42

Artemenko, G. V., L. M. Stepanyuk, D. K. Wozniak, V. G. Bakhmutov, and Yu O. Lytvynenko. "U-Pb age and ore mineralization of dike lamprophires of the Roсa Islands (Wilhelm Archipelago, West Antarctica)." Geochemistry and ore formation, no. 43 (2022): 31–40. http://dx.doi.org/10.15407/gof.2022.43.031.

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The dike of lamprophyres of the Roсa Islands chemically correspond to the basic rocks of the calc-alkaline series with high magnesian #mg 0.56. They have an increased content of Y (41.6 ppm) and Yb (11.5 ppm), which indicates the absence of garnet in the magmatic source. Rare earth elements are weakly differentiated — (La/Yb)N = 3.64). A deep negative European anomaly is distinguished — Eu/Eu*=0.36, which is probably due to the fractionation of plagioclase in the crustal magmatic source. Polymetallic mineralization for copper (445 g/t), zinc (207 g/t), lead (123 g/t) and tungsten (28.7 g/t) was found. Zircon from lamprophyres is represented by two types of crystals. The first type – transparent yellowish-pink individuals with a pyramidal-prismatic habit. In terms of quantity, it dominates; the second type is the formation of a flat outline. Dimensions are usually 0.3—0.7 mm along the L4 axis. Crystals of the first type were selected for geochronological research. It was found that the lamprophyre zircon contains very little lead, and a significant part of it is the lead isotope 204Pb. For this reason, age values for uranium-lead ratios of 238U/206Pb are more reliable. It was determined that the uranium-lead age of zircon from lamprophyres is within 50—60 Ma. Primary melt inclusions and less often mineral inclusions were found in zircon crystals. The former can sometimes occupy up to 30% of the crystal volume. Among the mineral inclusions, potassium feldspar, albite and potassium-sodium feldspar, apatite, and quartz were diagnosed. One primary inclusion of CO2 fluid was detected, the remaining inclusions are represented by primary crystallized melt inclusions. Rooting of the lamprophyre dyke is probably associated with the stress stresses experienced by the granodiorite plutons as a result of later tectonic movements.

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43

Maréchal, Chloé, and Francis Albarède. "Ion-exchange fractionation of copper and zinc isotopes." Geochimica et Cosmochimica Acta 66, no. 9 (May 2002): 1499–509. http://dx.doi.org/10.1016/s0016-7037(01)00815-8.

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44

嵇, 静. "Mechanism and Factors Influencing Copper Isotopic Fractionation: A Review." Advances in Geosciences 07, no. 03 (2017): 336–48. http://dx.doi.org/10.12677/ag.2017.73037.

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45

Jaouen, Klervia, Marie-Laure Pons, and Vincent Balter. "Iron, copper and zinc isotopic fractionation up mammal trophic chains." Earth and Planetary Science Letters 374 (July 2013): 164–72. http://dx.doi.org/10.1016/j.epsl.2013.05.037.

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46

Seo, Jung Hun, Sung Keun Lee, and Insung Lee. "Quantum chemical calculations of equilibrium copper (I) isotope fractionations in ore-forming fluids." Chemical Geology 243, no. 3-4 (September 2007): 225–37. http://dx.doi.org/10.1016/j.chemgeo.2007.05.025.

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47

Ryan, Brooke M., Jason K. Kirby, Fien Degryse, Hugh Harris, Mike J. McLaughlin, and Kathleen Scheiderich. "Copper speciation and isotopic fractionation in plants: uptake and translocation mechanisms." New Phytologist 199, no. 2 (April 18, 2013): 367–78. http://dx.doi.org/10.1111/nph.12276.

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48

Plumhoff, Alexandra M., Ryan Mathur, Rastislav Milovský, and Juraj Majzlan. "Fractionation of the copper, oxygen and hydrogen isotopes between malachite and aqueous phase." Geochimica et Cosmochimica Acta 300 (May 2021): 246–57. http://dx.doi.org/10.1016/j.gca.2021.02.009.

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Zeng, Zhigang, Xiaohui Li, Shuai Chen, Jeroen de Jong, Nadine Mattielli, Haiyan Qi, Christopher Pearce, and Bramley J. Murton. "Iron, copper, and zinc isotopic fractionation in seafloor basalts and hydrothermal sulfides." Marine Geology 436 (June 2021): 106491. http://dx.doi.org/10.1016/j.margeo.2021.106491.

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Ijichi, Yuta, Takeshi Ohno, and Shuhei Sakata. "Copper isotopic fractionation during adsorption on manganese oxide: Effects of pH and desorption." GEOCHEMICAL JOURNAL 52, no. 2 (2018): e1-e6. http://dx.doi.org/10.2343/geochemj.2.0516.

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