Heat and fluid flux through sediment on the western flank of the Mid-Atlantic Ridge: A hydrogeological study of North Pond

Autor:	Peter J. Schultheiss, Marcus G. Langseth, Keir Becker, Richard P. Von Herzen
Rok vydání:	1992
Předmět:	Hydrology Hydrogeology fungi Sediment Mid-Atlantic Ridge Groundwater recharge Seafloor spreading Geophysics Lithosphere parasitic diseases Ridge (meteorology) General Earth and Planetary Sciences Bathymetry Geomorphology Geology
Zdroj:	Geophysical Research Letters. 19:517-520
ISSN:	0094-8276
DOI:	10.1029/92gl00079
Popis:	A comprehensive survey of heat flow, sediment thickness and bathymetry in a large intermontane sediment pond on the western flank of the Mid-Atlantic Ridge (North Pond) shows that only 20 to 25% of the heat escaping from the lithosphere flows through the sediments in the pond even though they completely cover a 70 km2 area of the seafloor. Three in situ pore-pressure gradient measurements gave values that were negative relative to hydrostatic, indicating that there is drawdown of water through the sediment at rates of 1 to 5 mm/yr. North Pond is a recharge zone for hydrothermal circulation that is probably driven by lateral pressure gradients produced by topographic relief.
Databáze:	OpenAIRE
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