Controls on extrusion at mid-ocean ridges

Research Article| October 01, 1997 Controls on extrusion at mid-ocean ridges W. Roger Buck; W. Roger Buck 1Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Suzanne M. Carbotte; Suzanne M. Carbotte 1Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Carolyn Mutter Carolyn Mutter 1Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Author and Article Information W. Roger Buck 1Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964 Suzanne M. Carbotte 1Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964 Carolyn Mutter 1Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964 Publisher: Geological Society of America First Online: 02 Jun 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 Geological Society of America Geology (1997) 25 (10): 935–938. https://doi.org/10.1130/0091-7613(1997)025<0935:COEAMO>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation W. Roger Buck, Suzanne M. Carbotte, Carolyn Mutter; Controls on extrusion at mid-ocean ridges. Geology 1997;; 25 (10): 935–938. doi: https://doi.org/10.1130/0091-7613(1997)025<0935:COEAMO>2.3.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 SocietyGeology Search Advanced Search Abstract A magma lens can erupt to form extrusives only if it is under greater pressure than the static pressure in a column of magma reaching from the lens to the surface. The excess pressure results partly from overburden pressure caused by the presence of high- and low-density rocks (dikes and extrusives, respectively) above the lens. The thicker the pile of low-density extrusives, the lower the average overburden density. Thus, extrusion above a lens should be self-regulating, in that thickening the extrusive layer reduces the driving pressure for subsequent eruptions. Flexural stresses may affect extrusion by altering the pressure on a magma chamber. For ridges lacking an axial valley, we predict that deeper magma lenses should correlate with thicker extrusive layers, consistent with recent observations. 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.