2:30 PM - 2:45 PM
[SIT23-22] Defining the deep Earth with the OBK detector
Keywords:geoneutrino, mantle, heat flow, radiogenic power, thermal evolution
OBK (Ocean Bottom KamLAND) is the next generation underwater geoneutrino detector designed to measure the Earth’s abundance and distribution of Th and U inside the mantle. We have shown that such a detector is capable of identifying and mapping out large deep Earth structures (e.g., LLSVP), where they have enrichments in these elements relative to the ambient mantle.
Following on from the successes of the existing detectors in Japan and Italy, we propose an international effort, with Japanese geoscientists and particle physicists leading, to construct and deploy an ocean-going detector (OBK) to (1) map out structures in the mantle, (2) constraint the cooling history of the planet, (3) distinguish continental and mantle Th/U ratios, which documents the Earth’s biological imprint on the mantle, and (4) define the power driving plate tectonics. Beyond these goals in Earth Sciences, this instrument will have spinoffs for particle physics and astroparticle physics. This field of science has been richly acknowledged by Nobel prizes; the science proposed here has the potential to continue this great tradition.