Research interest

High-pressure experiments (e.g., multi-anvil press, laser-heating diamond anvil cell)

Chemical reactions and phase relations in volatile-bearing systems (e.g., C, H, S, O)

Solubility of hydrogen in melt and minerals and their thermodynamics

Volatile cycling and dynamics of subducting slab in deep mantle

Formation and evolution of exoplanets (e.g., sub-Neptune)

Publications :

Rang A :

2026

Y. Su, Z. Jin, R. Tao, J. Zhu, R. Liu, L. Wang, H. Zhang, S. Choudhary. 2026. Potential origin of natural vanadium hydride in the Earth’s shallow mantle, Petroleum Sci., In press. https://doi.org/10.1016/j.petsci.2026.04.006.

B. Zhao, J. Zhu, Q. Chen, T. Yoshino., 2026. Electrical conductivity of carbonatite melts to 20 GPa: constraints on partial melting atop the 410-km discontinuity and in the lower mantle transition zone. Journal of Geophysical Research: Solid Earth, 131, e2025JB033390. https://doi.org/10.1029/ 2025JB033390.

J. Zhu, R. Tao, Y. Lu, T. Ishii, W. Sun, L. Zhang., 2026. High-pressure experimental constraints of carbonates + pyrite ± water interactions: implications for coupled C-H-O-S cycling in subduction zones, Chemical Geology. 709, 123348.https://doi.org/10.1016/j.chemgeo.2026. 123348.

2025

T. Ishii, J. Zhu, E. Ohtani., 2025. Limited water contents of wadsleyite and ringwoodite coexisting with hydrous minerals in cold subducting slabs, Earth and Planetary Science Letters 658, 119310. https://doi.org/10.1016/j.epsl.2025.119310.

B. Zhao, J. Zhu, J. He, T. Yoshino., 2025. Electrical conductivity of carbonated hydrous basaltic melt: implications for the conductivity anomaly beneath the ocean floors. Journal of Geophysical Research: Solid Earth 130, e2025JB032215. https://doi.org/10.1029/2025JB032215.

J. Zhu, R. Tao, W. Sun, T. Ishii, Y. Li, H. Li, V. Stagno, L. Zhang., 2025. An experimental investigation of the redox reactions between carbonates and pyrrhotite at high P-T conditions: insights into diamond formation in deep subduction zones. Geochimica et Cosmochimica Acta 407, 265-281. https://doi.org/10.1016/j.gca.2025.08.012.

J. Zhu, R. Tao, T. Ishii, D. Ikuta, W. Xu, L. Zhang, Y. Su, R. Liu, Z. Jin.,2025, Iron hydride (FeHx) as a crucial intermediate in transformation of subducted H2O to abiotic H2 in Earth’s deep mantle, Science China: Earth Sciences 68, 1485-1496. https://doi.org/10.1007/s11430-024-1544-6.

2024

W. Sun, R. Tao, J. Zhu, C. Wang, T. Ishii, Y. Li., 2024. K- and Na-rich davemaoite inclusion in diamond is not inherited from deeply subducted oceanic crusts. Earth and Planetary Science Letters 637, 118741. https://doi.org/10.1016/ j.epsl.2024.118741.

Rang B et C :

J. Zhu, R. Tao, L. Zhang, T. Ishii. Experimental studies on the phase relations in MgO-SiO2-H2O systems: implication for deep water cycling. The 65th High Pressure Conference of Japan, Morioka, Japan, 2024, Oral presentation

J. Zhu, R. Tao, L. Zhang, T. Ishii. Stability of hydrous phases in the MgO-SiO2-H2O systems up to 28 GPa: insights to precise water cycling in the deep mantle. American Geophysical Union 2024 Meeting, Washington DC, The United States, 2024, Oral presentation.

J. Zhu, R. Tao, W. Sun, T. Ishii, Y. Li, H. Li, V. Stagno, L. Zhang. High-pressure experimental studies on the redox reactions between carbonate and reduced phases (sulfide and FeNi alloy): insights into oxygen fugacity heterogeneity, carbonate reduction and diamond formation. American Geophysical Union 2024 Meeting, Washington DC, The United States, 2024, eLightning presentation.

J. Zhu, R. Tao, L. Zhang, T. Ishii. Stability of hydrous minerals in hydrous pyrolite system at high pressure: implication for water transportation into the deep mantle. Japan Geoscience Union Meeting, Chiba, Japan, 2025, Oral presentation.

J. Zhu, T. Ishii, J. He, Y. Li, L. Zhang, R. Tao. Experimental study on the stability of andradite (Ca3Fe2Si3O12): insights into fO2 heterogeneity, ferric iron and diamond distributions in the deep mantle. Japan Geoscience Union Meeting, Chiba, Japan, 2025, Poster presentation.