2015/08-2018/12 Arizona State University, Ph.D, Geological Sciences
2012/08-2015/08 Arizona State University, Master, Chemistry
2005/09-2009/06 China University of Geosciences (Wuhan), Bachelor, Environmental Engineering

2022/02-current School of Oceanography, Shanghai Jiaotong University, Assistant Professor
2019/01-2022/01 Florida State University, Postdoc

Trace metal stable isotope geochemistry; Paleoceanograpy; Evolution of oxygen and life on Earth; Carbonate diagenesis

First/Corresponding author*
12. Zhang Q., Ding L., Chen X*., Brennecka G. A., Sun Y., Ma X., Gao B., Zhang Q. and Willems H. (2023) The large decline in carbonate d238U from a PETM section at Tingri (South Tibet) was driven by local sea-level changes, not global oceanic anoxia. Earth & Planetary Science Letters, in press.
11. Mei Q-F., Chen X*., Yang J-H., Zhu Y-S. and Owens J. D. (2022) Tracing recycled crustal materials in the subcontinental lithospheric mantle using thallium isotopes. Geophysical Research Letters, 49, e2022GL099959.
10. Chen X*., Robinson S. A., Romaniello S. J. and Anbar A. D. (2022) 238U/235U in calcite is more susceptible to carbonate diagenesis. Geochimica et Cosmochimica Acta, 326, 273-287.
9. Chen X*., Li S., Newby S. M., Lyons T. W., Wu F. and Owens J. D. (2022) Black Sea iron and managanese shuttle has no effect on sedimentary thallium and vanadium isotope signatures. Geochimica et Cosmochimica Acta, 317, 218-233.
8. Chen X*., Romaniello S. J., McCormick. M., Havig J. R., Sherry A., Zheng W. and Anbar A. D. (2021) Anoxic depositional overprinting of uranium isotopes (238U/235U) in calcite: When do carbonates tell black shale tales? Geology, 49, 1193-1197.
7. Chen X*., Romaniello S. J. and Anbar A. D. (2021) Preliminary exploration of molybdenum isotope fractionation during coprecipitation of molybdate with abiotic and microbial calcite. Chemical Geology, 566, 120102.
6. Chen X*. (2020) Aqueous uranium speciation on U/Ca ratios in foraminiferal calcite: The importance of the minor U species—UO2(CO3)22-. ACS Earth & Space Chemistry, 4, 2050–2060.
5. Chen X*., Zheng W. and Anbar D. A. (2020) Uranium isotope fractionation during U(VI) uptake by freshwater plankton. Envrionmental Science & Technology, 54, 2744–2752.
4. Chen X*., Romaniello S. J., Herrmann A. D., Samankassou E. and Anbar A. D. (2018) Biological effects on uranium isotope fractionation (238U/235U) in primary biogenic carbonates. Geochimica et Cosmochimica Acta, 240, 1–10.
3. Chen X*., Romaniello S. J., Herrmann A. D., Hardisty D., Gill B. C. and Anbar A. D. (2018) Diagenetic effects on uranium isotope fractionation in carbonate sediments from the Bahamas. Geochimica et Cosmochimica Acta, 237, 294–311.
2. Chen X*., Romaniello S. J. and Anbar A. D. (2017) Uranium isotope fractionation induced by aqueous speciation: Implications for U isotopes in marine CaCO3 as a paleoredox proxy. Geochimica et Cosmochimica Acta, 215, 162–172.
1. Chen X*., Romaniello S. J., Herrmann A. D., Wasylenki L. E. and Anbar A. D. (2016) Uranium isotope fractionation during coprecipitation with aragonite and calcite. Geochimica et Cosmochimica Acta, 188, 189–207.

Coauthor
6. Yang S*., Lu X., Chen X., Zheng W., Owens J. D., Young S. A. and Kendall B. (2023) Uranium and molybdenum isotope evidence for globally extensive marine euxinia on continental margins and in epicontinental seas during the Devonian-Carboniferous Hangenberg Crisis. Geochimica et Cosmochimica Acta, in press.
5. Song H*., Algeo T. J., Song H., Tong J., Wignall P. B., Bond D. P. G., Zheng W., Chen X., Romaniello S. J., Wei H. and Anbar A. (2023) Global oceanic anoxia linked with the Capitanian (Middle Permian) marine mass extinction, Earth & Planetary Science Letters, 610, 118128.
4. Hlohowskyi S., Chen X., Romaniello S. J., Vorlicek T., Anbar A. D., Lyons T. and Chappaz A. (2021) Quantifying molybdenum isotopic speciation in sulfidic water: Implications for the Paleoredox proxy. ACS Earth & Space Chemistry, 5, 2891-2899.
3. Zhang F., Lenton T. M., Rey A. D., Romaniello S. J., Chen X., Planavsky N. J., Clarkson M. O., Dahl T. W., Lau K. V., Wang W., Li Z., Zhao M., Isson T., Algeo T. J. and Anbar A. D. (2020) Uranium isotopes in marine carbonates as a global ocean paleoredox proxy: A critical review. Geochimica et Cosmochimica Acta, 287, 27–49.
2. Ostrander C., Owens J. D., Nielsen S., Lyons T. W., Shu Y., Chen X., Sperling E., Jiang G., Johnson D., Sahoo W. and Anbar A. D. D. (2020) Thallium isotope ratios in shales from South China and northwestern Canada suggest widespread O2 accumulation in marine bottom waters was an uncommon occurrence during the Ediacaran Period. Chemical Geology, 557, 119856.
1. Chen L., Ma T., Du Y., Xiao C., Chen X., Liu C. and Wang Y. (2016) Hydrochemical and isotopic constraints on evolution of geothermal water in coastal plain of Southwestern Guangdong Province, China. Journal of Volcanology and Geothermal Research, 318, 45–54.