Abstract
Massive sulphide deposits described as inactive hydrothermal deposits (samples CYP) along the axis of East Pacific Rise (EPR) were first discovered at 21 °N, about 700 m west of the active rift1. This discovery was followed by that of active vents made of sulphides (samples Alvin) in the central part of the rift valley2. Due to the importance of the flux of elements presently discharging and its impact on the chemistry of the ocean, it is important to understand the duration of the phenomenon and its possible periodicity. We present here an attempt to date the fossil and the active chimneys using radio-isotope methods.
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Lalou, C., Brichet, E. Ages and implications of East Pacific Rise sulphide deposits at 21 °N. Nature 300, 169–171 (1982). https://doi.org/10.1038/300169a0
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DOI: https://doi.org/10.1038/300169a0
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