Steady and non-steady state magma chambers below the East Pacific Rise

Batiza, R.; Niu, Yaoling; Karsten, J.L.; Boger, W.; Potts, E.; Norby, L.; Butler, R.

doi:10.1029/95gl00016

Steady and non-steady state magma chambers below the East Pacific Rise

Batiza, R.; Niu, Yaoling; Karsten, J.L.; Boger, W.; Potts, E.; Norby, L.; Butler, R.

Authors

R. Batiza

Yaoling Niu

J.L. Karsten

W. Boger

E. Potts

L. Norby

R. Butler

Abstract

Volcanic rocks collected on flowline traverses on the flanks of the East Pacific Rise (EPR) document changes in axial magma chemistry with time, providing a record of the thermal history of axial magma chambers (AMC). We present data for a sample set of closely spaced (1–2 km) samples along EPR flowlines at three localities out to ∼800 ka showing both steady (constant average temperature) and non-steady state behavior of magma chambers on time scales of 200–500 ka. Though based on only three symmetrical traverses so far, it appears that magmatically robust ridge locations (11°20′N and 9°30′N) have steady state chambers, whereas a magmatically starved axis (10°30′N) shows large temperature changes with time. These observations provide a new petrologic perspective to the ongoing debate regarding the significance and causes of morphologic variations along the axis of the East Pacific Rise.

Citation

Batiza, R., Niu, Y., Karsten, J., Boger, W., Potts, E., Norby, L., & Butler, R. (1996). Steady and non-steady state magma chambers below the East Pacific Rise. Geophysical Research Letters, 23(3), 221-224. https://doi.org/10.1029/95gl00016

Journal Article Type	Article
Publication Date	Feb 1, 1996
Deposit Date	Apr 18, 2016
Publicly Available Date	Apr 19, 2016
Journal	Geophysical Research Letters
Print ISSN	0094-8276
Publisher	Wiley
Peer Reviewed	Peer Reviewed
Volume	23
Issue	3
Pages	221-224
DOI	https://doi.org/10.1029/95gl00016

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Copyright Statement
Batiza, R., Niu, Y.L., Karsten, J.L., Boger, W., Potts, E., Norby, L. & Butler, R. (1996). Steady and non-steady state magma chambers below the East Pacific Rise. Geophysical Research Letters, 23(3), 221-224, 10.1029/95gl00016 (DOI). To view the published open abstract, go to http://dx.doi.org and enter the DOI.