Which of the following would NOT be considered an expected origin of a mercury deposit?

Mercury deposits typically form through specific geological processes that concentrate the metal in economically viable forms. Among these, epithermal deposits are formed from mineralizing fluids at relatively low temperatures associated with volcanic activity. Volcanogenic deposits involve the formation from volcanic eruptions, while clastic sedimentation refers to the accumulation of sediments that might contain mercury if sourced from areas rich in this metal.

In contrast, weathering refers to the general breakdown of rocks and minerals at the Earth's surface due to various environmental factors, which does not typically lead to the direct formation of concentrated mercury deposits. While weathering processes can release mercury from its source rock, the act of weathering alone does not concentrate it into a deposit that can be mined or exploited. Hence, weathering is less likely to create a significant or accessible concentration of mercury compared to other processes listed.