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Influence of magma supply and spreading rate on crustal magma bodies and emplacement of the extrusive layer: Insights from the East Pacific Rise at lat 16°N

1998; Geological Society of America; Volume: 26; Issue: 5 Linguagem: Inglês

10.1130/0091-7613(1998)026 2.3.co;2

1943-2682

S. M. Carbotte, Carolyn Z. Mutter, John C. Mutter, Gustavo Correa,

Geological and Geochemical Analysis

Research Article| May 01, 1998 Influence of magma supply and spreading rate on crustal magma bodies and emplacement of the extrusive layer: Insights from the East Pacific Rise at lat 16°N Suzanne Carbotte; Suzanne Carbotte 1Lamont-Doherty Earth Observatory, Box 1000, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Carolyn Mutter; Carolyn Mutter 1Lamont-Doherty Earth Observatory, Box 1000, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar John Mutter; John Mutter 1Lamont-Doherty Earth Observatory, Box 1000, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Gustavo Ponce-Correa Gustavo Ponce-Correa 1Lamont-Doherty Earth Observatory, Box 1000, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Author and Article Information Suzanne Carbotte 1Lamont-Doherty Earth Observatory, Box 1000, Palisades, New York 10964 Carolyn Mutter 1Lamont-Doherty Earth Observatory, Box 1000, Palisades, New York 10964 John Mutter 1Lamont-Doherty Earth Observatory, Box 1000, Palisades, New York 10964 Gustavo Ponce-Correa 1Lamont-Doherty Earth Observatory, Box 1000, 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 (1998) 26 (5): 455–458. https://doi.org/10.1130/0091-7613(1998)026 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 Suzanne Carbotte, Carolyn Mutter, John Mutter, Gustavo Ponce-Correa; Influence of magma supply and spreading rate on crustal magma bodies and emplacement of the extrusive layer: Insights from the East Pacific Rise at lat 16°N. Geology 1998;; 26 (5): 455–458. doi: https://doi.org/10.1130/0091-7613(1998)026 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 Seismic reflection data from the East Pacific Rise at lat 16°N, which is spreading at the high end of intermediate rates, suggest that the depths at which axial magma chambers reside do not vary smoothly as a function of spreading rate. Rather, magma-chamber depths form two distinct populations, each associated with a distinct axial morphology and with an abrupt transition occurring within the intermediate-spreading-rate range. Our data (1) show that the melt lens at high-intermediate-spreading ridges lies at a shallow level similar to lens depths at faster-spreading ridges, and (2) provide further support for the spreading-rate invariance of ridges with axial highs noted in other ridge properties. The axial morphology of the two ridge segments within the study area differs markedly, and a large contrast in magma supply is inferred. The ridge segment with greater magma supply is associated with a broader and more continuous melt lens, a wider region over which the extrusive crust accumulates, and a thicker extrusive layer off-axis where supply to the ridge segment appears to be centered. However, on-axis, the extrusive layer is thinnest where magma supply is robust and a shallower melt lens is observed, consistent with a model in which magma pressure controls the thickness of the extrusive layer accumulated above the magma lens. 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.