The Guaymas Basin hiking guide to hydrothermal mounds, chimneys, and microbial mats : complex seafloor expressions of subsurface hydrothermal circulation

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2016-02-18
Authors
Teske, Andreas
de Beer, Dirk
McKay, Luke J.
Tivey, Margaret K.
Biddle, Jennifer F.
Hoer, Daniel
Lloyd, Karen G.
Lever, Mark A.
Røy, Hans
Albert, Daniel B.
Mendlovitz, Howard P.
MacGregor, Barbara J.
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10.3389/fmicb.2016.00075
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Keywords
Guaymas basin
Hydrothermal circulation
Hydrothermal sediment
Beggiatoa mat
In situ profiles
Heatflow
Porewater chemistry
Abstract
The hydrothermal mats, mounds, and chimneys of the southern Guaymas Basin are the surface expression of complex subsurface hydrothermal circulation patterns. In this overview, we document the most frequently visited features of this hydrothermal area with photographs, temperature measurements, and selected geochemical data; many of these distinct habitats await characterization of their microbial communities and activities. Microprofiler deployments on microbial mats and hydrothermal sediments show their steep geochemical and thermal gradients at millimeter-scale vertical resolution. Mapping these hydrothermal features and sampling locations within the southern Guaymas Basin suggest linkages to underlying shallow sills and heat flow gradients. Recognizing the inherent spatial limitations of much current Guaymas Basin sampling calls for comprehensive surveys of the wider spreading region.
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© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Frontiers in Microbiology 7 (2016): 75, doi:10.3389/fmicb.2016.00075.
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Frontiers in Microbiology 7 (2016): 75
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