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Earth Institute Research Projects

Collaborative Research: Crustal Accretion and Mantle Processes Along the Subduction-Influenced Eastern Lau Spreading Center

Lead PI: Dr. Spahr C. Webb , Dr. William Menke

Unit Affiliation: Seismology, Geology & Tectonophysics, Lamont-Doherty Earth Observatory (LDEO)

September 2008 - August 2014
Inactive
Pacific Ocean
Project Type: Research

DESCRIPTION: Ambient seismic noise will be recorded over the Eastern Lau Spreading Center for 13 months and then analyzed for ambient noise cross correlation tomography, body wave tomography, surface wave phase velocities, body wave attenuation, and shear wave splitting.

OUTCOMES: 51 OBSs were recovered and the recorded seismic ambient noise has been partially processed. 3-D numerical modeling of previous results from the EPR has been modeled. Two one-time publications.

SPONSOR:

National Science Foundation (NSF)

FUNDED AMOUNT:

$420,462

WEBSITE:

https://www.nsf.gov/awardsearch/showAward?AWD_ID=0426369&HistoricalAwards=false

PUBLICATIONS:

Yang Zha, Spahr C. Webb, S. Shawn Wei, Douglas A. Wiens, Donna K. Blackman, William Menke, Robert A. Dunn, and James A. Conder. "Upper mantle shear velocity structure along the Eastern Lau Spreading Center from OBS ambient noise tomography," Earth and Planet. Sci. Lett, v.408, 2014, p. 194. doi:doi.org/10.1016/j.epsl.2014.10.019

Zha, Yang, Spahr C. Webb, and William Menke. "Determining the orientations of ocean bottom seismometers using ambient noise correlation," Geophysical Research Letters, v.40, 2013, p. 3585. doi:doi:10.1002/grl.50698

KEYWORDS

ambient seismic noise tomography shear wave splitting ocean bottom seismographs phase velocity seismology geology and tectonics body waves surface waves crustal accretion mantle processes eastern lau spreading center

THEMES

Earth fundamentals