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Geological Society, London, Special Publications; 1995; v. 87; p. 121-132;
DOI: 10.1144/GSL.SP.1995.087.01.11
© 1995 Geological Society of London

Hydrothermal deposits and metalliferous sediments from TAG, 26°N Mid-Atlantic Ridge

Rachel A. Mills

Department of Oceanography, University of Southampton, Southampton SO17 1BJ, UK

The Trans-Atlantic Geotraverse (TAG) hydrothermal site at 26°N on the Mid-Atlantic Ridge has been the focus of many studies since the early 1970s. The hydrothermal field includes a wide variety of deposits ranging from high-temperature sulphide chimneys, low-temperature Mn deposits, diffuse flow to relict, inactive mounds. These deposits reflect the different styles of venting and the evolution of the hydrothermal system over time. Metalliferous sediments in this area are derived from both mass wasting of mound features and fall out of plume particulates. The active TAG mound was drilled by the Ocean Drilling Programme in October/November 1994, which provided the first samples from beneath the surface at this site. The current state of knowledge of processes occurring within TAG metalliferous deposits are reviewed here.





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Geological Society, London, Special Publications, 1998; 148: 217 - 240.
[Abstract] [PDF]