Multi-channel seismic imaging of a crustal magma chamber along the East Pacific Rise

@article{Detrick1987MultichannelSI,
  title={Multi-channel seismic imaging of a crustal magma chamber along the East Pacific Rise},
  author={Robert S. Detrick and Peter Buhl and Emilio E. Vera and John Colin Mutter and John A. Orcutt and John A. Madsen and Thomas M. Brocher},
  journal={Nature},
  year={1987},
  volume={326},
  pages={35-41}
}
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. 
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TLDR
Observations indicate that the paradigm of ridge crest magma chambers as small, sill-like, midcrustal bodies is applicable to a wide range of intermediate- and fast-spreading ridges.
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References

SHOWING 1-10 OF 32 REFERENCES
Magma chamber and mantle reflections – East Pacific Rise
A multichannel seismic reflection profile of stacked and migrated common depth point data across the East Pacific Rise near the Siqueiros Fracture Zone supports and extends previous observations (at
Petrological and tectonic segmentation of the East Pacific Rise, 5°30′–14°30′ N
Lavas from the fast-spreading East Pacific Rise are geochemically diverse even within a single tectonically defined spreading cell. Within such spreading cells, small offsets of the rise axis are
Axial processes along a segment of the East Pacific Rise, 10°–12° N
Axial segments of the East Pacific Rise are made up of individual volcanoes. Each volcano has a distinct magma composition and shows a systematic variation in the fractional crystallization with
A low velocity zone underlying a fast-spreading rise crest
WE present the results of an unreversed seismic refraction profile on the East Pacific Rise near the Siqueiros Fracture Zone recorded using a digital ocean bottom seismograph (OBS)1. An analysis of P
Constraints on the structure of the East Pacific Rise from seismic refraction data
University of Washington seismic data taken during ROSE phase 1 have been used to study the structure of the East Pacific Rise in the vicinity of 12°N. Off axis but within 50 km of the axis we find
The East Pacific Rise in cross section: A seismic model
In 1982 we undertook a seismic refraction experiment, known as the MAGMA expedition, to examine the detailed structure of the East Pacific Rise near 12°50′N. This segment of the rise, where the full
Compressional and shear wave structure of the East Pacific Rise at 11°20′N: Constraints from three‐component ocean bottom seismometer data
We report the analysis of seismograms from two orthogonal refraction lines in the ROSE area of the East Pacific Rise at 11°20′N recorded by a three-component ocean bottom seismometer (OBS). Converted
East Pacific Rise Near 13�N: Geology of New Hydrothermal Fields
Abundant massive sulfide deposits are present at the crest of the East Pacific Rise near 13� North, where the opening rate is about 12 centimeters per year. Large manganese and helium-3 anomalies in
Structure and variability of oceanic crust on the flanks of the East Pacific Rise between 11° and 13°N
We use over 500 seismograms collected by five ocean bottom seismometers to examine the structure and variability of 0.5-m.y.-old crust in the Rivera Ocean Seismic Experiment (ROSE) area of the East
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