Portal de Periódicos da CAPES

Petrologic Significance of Low Heat Flow on the Flanks of Slow-Spreading Midocean Ridges

1972; Geological Society of America; Volume: 83; Issue: 10 Linguagem: Inglês

10.1130/0016-7606(1972)83[2947

1943-2674

Gilles Guérin,

Geological formations and processes

Research Article| October 01, 1972 Petrologic Significance of Low Heat Flow on the Flanks of Slow-Spreading Midocean Ridges ROGER N ANDERSON ROGER N ANDERSON University of California, Marine Physical Laboratory of the Scripps Institution of Oceanography, La Jolla, California 92037 Search for other works by this author on: GSW Google Scholar GSA Bulletin (1972) 83 (10): 2947–2956. https://doi.org/10.1130/0016-7606(1972)83[2947:PSOLHF]2.0.CO;2 Article history received: 06 Mar 1972 rev-recd: 08 May 1972 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation ROGER N ANDERSON; Petrologic Significance of Low Heat Flow on the Flanks of Slow-Spreading Midocean Ridges. GSA Bulletin 1972;; 83 (10): 2947–2956. doi: https://doi.org/10.1130/0016-7606(1972)83[2947:PSOLHF]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract A compilation of heat flow versus age of oceanic crust about all the midocean ridges demonstrates that low heat-flow anomalies associated with the crest and flanks appear to occur only on slow-spreading ridges. Such crestal anomalies are probably caused by large-scale hydrothermal circulation in fractures throughout the newly formed oceanic crust, which results in rapid cooling of the crestal zone and hydration of the crust. Away from the crest, sediments seal the fractures and circulation stops. The crust then begins to heat until it reaches equilibrium with the conductively cooling mantle, after which it cools with the rest of the lithospheric plate.If, however, the crust heats to above the equilibrium stability temperature for its hydrous assemblage, dehydration occurs, absorbing enough heat to produce the observed low heat flow on the flanks of these slow-spreading ridges. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.