Johanna Katharina Krayer - Leibniz University Hannover Research Portal

5 Article

Effect of submarine hydrothermal activity and emerged landmasses on Paleoarchean Ocean chemistry: Insights from the Tomka iron formation, Daitari Greenstone Belt, Singhbhum Craton, India
Krayer, J. K., Kienle, S., Jodder, J., Pakulla, J. J., Münker, C., Hofmann, A., Schulz, T., Koeberl, C., Weyer, S. & Viehmann, S., 30 Mar 2026, In: Chemical Geology. 705, 123252.
Research output: Contribution to journal › Article › Research › peer review

Open Access
Process-driven fractionation of magnesium isotopes in small tropical river catchments: Insights from Hainan Island
Li, Z., Hohl, S. V., Viehmann, S., Kaufmann, A. B., Krayer, J. K. & Hu, Z., 2026, In: Journal of Geochemical Exploration. 290, 108154.
Research output: Contribution to journal › Article › Research › peer review
Europium traces the impact of high temperature hydrothermal systems on the early oceans
Viehmann, S., Stüeken, E. E., Hohl, S. V., Tepe, N., Lin, Y., Kraemer, D., Van Kranendonk, M., Krayer, J. K., Ernst, D. & Weyer, S., 6 May 2025, In: Geochemical Perspectives Letters. 34, p. 57-61 5 p.
Research output: Contribution to journal › Article › Research › peer review

Open Access
Global redox and bio-productivity changes during the oceanic anoxic event 2 (OAE2): Insights from combined U-C isotopes of the Trans-Saharan epicontinental Seaway
Abubakar, U., Hohl, S. V., Viehmann, S., Weyer, S., Usman, M. B., Krayer, J. K., Bomou, B. & Adatte, T., Dec 2025, In: Gondwana Research. 148, p. 192-209 18 p.
Research output: Contribution to journal › Article › Research › peer review
The influence of mafic and felsic crust on the seawater chemistry ca. 3.0 billion years ago: Evidence from Nd isotopes in banded iron formations from the Murchison Greenstone Belt
Krayer, J. K., Jodder, J., Hofmann, A., Weyer, S., Willbold, M., Schulz, T., Koeberl, C. & Viehmann, S., Mar 2025, In: Precambrian research. 418, 107701.
Research output: Contribution to journal › Article › Research › peer review

Open Access

The evolution of the earliest marine habitats on Earth
Viehmann, S. (Principal Investigator) & Krayer, J. K. (Project staff)
1 May 2023 → 31 Aug 2026
Project: Research