Unveiling the Mystery of the Ghost Plume Beneath Oman
Al Hajar Mountains in Oman
L_B_Photography/Shutterstock
A recent discovery has shed light on a fascinating geological phenomenon beneath the rocky terrain of Oman. Scientists have identified what could potentially be the first known “ghost plume” – a hot column of rock originating from the Earth’s lower mantle, with no visible volcanic activity on the surface.
Mantle plumes are enigmatic conduits of molten rock that are believed to transfer heat from the core-mantle boundary to the Earth’s surface, typically located far away from tectonic plate boundaries. While there are several known instances of mantle plumes beneath continental plates, such as Yellowstone and the East African rift, the absence of surface volcanism in Oman sets this discovery apart.
Dr. Simone Pilia from the King Fahd University of Petroleum and Minerals in Saudi Arabia stumbled upon the potential ghost plume while analyzing seismic data from the region. By observing the velocity of seismic waves and mineral phase transitions deep within the Earth, Pilia and his team inferred the existence of a plume extending over 660 kilometers beneath Oman.
This discovery also offers a plausible explanation for the ongoing elevation rise in the region, even after tectonic compression ceased. Furthermore, it aligns with theories regarding the Indian tectonic plate’s movement shift, providing valuable insights into the Earth’s dynamic processes.
Named the “Dani plume” in honor of Pilia’s son, this geologic feature hints at the presence of additional hidden plumes within the mantle beneath Oman. Should these ghost plumes be confirmed, they could signify a significant alteration in the flow of heat from the Earth’s core through the mantle, impacting our understanding of planetary evolution.
Experts like Dr. Saskia Goes from Imperial College London acknowledge the thoroughness of the study but caution that detecting narrow plumes remains challenging. Nevertheless, the implications of uncovering more ghost plumes could revolutionize our comprehension of heat distribution within the Earth’s interior.
