Journal ArticleDOI
Multi-channel seismic imaging of a crustal magma chamber along the East Pacific Rise
Robert S. Detrick,Peter Buhl,E. E. Vera,John C. Mutter,John A. Orcutt,J. Madsen,Thomas M. Brocher +6 more
TLDR
A reflection observed on multi-channel seismic profiles along and across the East Pacific Rise between 8°50′ N and 13°30′ N is interpreted to arise from the top of a crustal magma chamber located 1.2-2.4 km below the sea floor as discussed by the authors.Abstract:
A reflection observed on multi-channel seismic profiles along and across the East Pacific Rise between 8°50′ N and 13°30′ N is interpreted to arise from the top of a crustal magma chamber located 1.2–2.4 km below the sea floor. The magma chamber is quite narrow (<4 – 6 km wide), but can be traced as a nearly continuous feature for tens of kilometres along the rise axis.read more
Citations
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Journal ArticleDOI
Mid-Ocean Ridge Hydrothermal Fluxes and the Chemical Composition of the Ocean
Henry Elderfield,Adam Schultz +1 more
TL;DR: In this article, the authors presented estimates of mid-ocean ridge axial heat fluxes and total hydrothermal flux (9 ± 2 × 1012 W) using various geochemical methods.
Journal ArticleDOI
Fluid‐mechanical models of crack propagation and their application to magma transport in dykes
John R. Lister,Ross C. Kerr +1 more
TL;DR: In this paper, it is shown that the transport of magma in feeder dykes is characterized by a local balance between buoyancy forces and viscous pressure drop, that elastic forces play a secondary role except near the dyke tip and that the influence of the fracture resistance of crustal rocks on dyke propagation is negligible.
Journal ArticleDOI
Mid-ocean ridge magma chambers
John M. Sinton,Robert S. Detrick +1 more
TL;DR: In this paper, it was shown that the composition of the melt lens is mainly moderately fractionated ferrobasalt, which is consistent with a model that effectively separates the processes of magma mixing and fractionation into different parts of a composite magma chamber.
Mid-ocean ridge magna chambers
J. M. Sinton,R. S. Detrick +1 more
TL;DR: In this article, the authors show that the composition of the melt lens is mainly moderately fractionated ferrobasalt with isolated pockets of magma in the transition zone of the East Pacific Rise (EPR).
Journal ArticleDOI
Abyssal peridotites, very slow spreading ridges and ocean ridge magmatism
TL;DR: In this paper, it was shown that the seafloor peridotites of the SW Indian and American-Antarctic Ridges contain up to 30% trapped melt.
References
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Journal ArticleDOI
Mid-Ocean Ridges: Fine Scale Tectonic, Volcanic and Hydrothermal Processes Within the Plate Boundary Zone
TL;DR: In this article, the authors focus on the fine-scale tectonics and geophysics of the active axial zone of mid-ocean ridges with reference to associated volcanic and hydrothermal processes.
Journal ArticleDOI
Samail Ophiolite plutonic suite: Field relations, phase variation, cryptic variation and layering, and a model of a spreading ridge magma chamber
John S. Pallister,C. A. Hopson +1 more
TL;DR: In this article, an intact plutonic sequence within the Samail ophiolite in the Ibra area, southeastern Oman Mountains, reveals stratigraphic, structural, and petrologic details of oceanic layer 3.
Journal ArticleDOI
Petrological and tectonic segmentation of the East Pacific Rise, 5°30′–14°30′ N
TL;DR: In the East Pacific Rise, small offsets of the rise axis are often boundaries between petrologically distinct magmatic units which must be supplied independently from beneath the ocean crust as mentioned in this paper.
Journal ArticleDOI
East Pacific Rise from Siqueiros to Orozco Fracture Zones: Along-strike continuity of axial neovolcanic zone and structure and evolution of overlapping spreading centers
TL;DR: In this article, the authors used the Sea Beam multibeam echo-sounding system to survey the East Pacific Rise (EPR) from 8°20′N to 18°30′N, obtaining complete coverage of the EPR axial neovolcanic zone and all intervening transform faults.
Journal ArticleDOI
Compositional variations of young basalts in the Mid-Atlantic Ridge rift valley near lat 36°49′N
Wilfred B. Bryan,James G. Moore +1 more
TL;DR: In this paper, a model was proposed whereby this crystal fractionation occurs in a shallow, narrow (6km wide) magma chamber underlying the median valley of the Mid-Atlantic Ridge during the French American Mid-Ocean Undersea Study (FAMOUS) in the summer of 1974.
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