HYDROTHERMAL CIRCULATION THROUGH MID-OCEAN RIDGE FLANKS: FLUXES OF HEAT AND MAGNESIUM
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dc.contributor.author | Mottl M.J. | |
dc.contributor.author | Wheat C.G. | |
dc.date.accessioned | 2020-12-04T08:50:34Z | |
dc.date.available | 2020-12-04T08:50:34Z | |
dc.date.issued | 1994 | |
dc.identifier | https://elibrary.ru/item.asp?id=31679564 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1994, , 10, 2225-2237 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/20447 | |
dc.description.abstract | Thermally driven convection of seawater occurs through oceanic crust of all ages, at the seafloor spreading axis, on mid-ocean ridge flanks, and in the ocean basins. At the ridge axis and on the flanks, circulating seawater produces a major chemical exchange between the oceans and the crust. Based on heat budget constraints and the composition of hot springs, between 10 and 40% of the river flux of Mg can be taken up during high-temperature alteration of the basaltic crust along the ridge axis. Most of the hydrothermal heat loss, however, occurs on the mid-ocean ridge flanks, where the temperatures are lower and the seawater flux correspondingly larger. The estimated heat loss on the flanks is so large that upwelling must occur over a large fraction (5–30%) of the seafloor less than 65 Ma in age, if temperatures are < 20°C and seepage velocities are on the order of 10 to 100 cm/y. The circulating seawater needs to lose on average less than 1–2% of its Mg content in order to solve the Mg mass balance for the oceans. | |
dc.title | HYDROTHERMAL CIRCULATION THROUGH MID-OCEAN RIDGE FLANKS: FLUXES OF HEAT AND MAGNESIUM | |
dc.type | Статья |
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