Seismic Images of Active Magma Systems beneath the East Pacific Rise between 17-Degrees-05' and 17-Degrees-35's

Publication Type  Journal Article
Year of Publication  1995
Authors  Mutter, J. C.; Carbotte, S. M.; Su, W. S.; Xu, L. Q.; Buhl, P.; Detrick, R. S.; Kent, G. M.; Orcutt, J. A.; Harding, A. J.
Journal Title  Science
Volume  268
Issue  5209
Pages  391-395
Journal Date  Apr 21
ISBN Number  0036-8075
Accession Number  ISI:A1995QU57200031
Key Words  midocean ridges; spreading centers; oceanic-crust; segmentation; 9-degrees-n; accretion; profiles

Seismic reflection data from the East Pacific Rise between 17 degrees 05' and 17 degrees 35'5 image a magma lens that varies regularly in depth and width as ridge morphology changes, confirming the notion that axial morphology can be used to infer ridge magmatic state. However, at 17 degrees 26'S, where the ridge is locally shallow and broad, the magma lens is markedly shallower and wider than predicted from regional trends. In this area, submersible dives reveal recent volcanic eruptions. These observations indicate that it is where the width and depth of the magma chamber differ from regional trends, indicating an enhanced magmatic budget, that is diagnostic of current magmatism.


Qu572Times Cited:51Cited References Count:27

URL  <Go to ISI>://A1995QU57200031