Flood P.G., Fagerstrom J.A., Rougerie Francis. (1996). Interpretation of the origin of massive replacive dolomite within atolls and submerged carbonate platforms : strontium isotopic signature ODP hole 866A, resolution Guyot, mid-Pacific mountains. Sedimentary Geology, 101, p. 9-13. ISSN 0037-0738.
Titre du document
Interpretation of the origin of massive replacive dolomite within atolls and submerged carbonate platforms : strontium isotopic signature ODP hole 866A, resolution Guyot, mid-Pacific mountains
Année de publication
1996
Type de document
Article
Auteurs
Flood P.G., Fagerstrom J.A., Rougerie Francis
Source
Sedimentary Geology, 1996,
101, p. 9-13 ISSN 0037-0738
Endo-upwelling is a geothermally driven convective process operating within the upper part of the volcanic foundation and overlying carbonate pile, in atolls and guyots. By this process deep oceanic water, rich in CO2, and dissolved nitrates, phosphates and silicates is drawn into the pile, circulates slowly upward through the porous-permeable carbonate interior and emerges at either the reef crest or lagoon on atolls to support the primary productivity of the surficial communities, or towards the interior of the platform surface on guyots. Continuous operation of the endo-upwelling process requires : (a) heat from the volcanic foundation; (b) an external impermeable apron on the submerged flanks to confine the convective flow within the pile; and (c) a porous cap from which water exiting the plumbing system returns to the ocean. (D'après résumé d'auteur)
