Nicaragua Migration Image MARGINS/TUCAN 2004-6
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Nicaragua Migration Image MARGINS/TUCAN 2004-6 (MacKenzie et al., submitted, 2009) Moho slab surface dVs/Vs fast slow et al: Abers, Rondenay, Fischer
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Nicaragua Migration Image MARGINS/TUCAN 2004-6. (MacKenzie et al., submitted, 2009). Moho. fast. slab surface. dVs/Vs. slow. et al: Abers, Rondenay, Fischer. (MacKenzie et al., submitted, 2009). Conversion widths in stacked receiver functions. Receiver functions. w = 1.9 s - PowerPoint PPT Presentation
Transcript of Nicaragua Migration Image MARGINS/TUCAN 2004-6
Nicaragua Migration ImageMARGINS/TUCAN 2004-6
(MacKenzie et al., submitted, 2009)
Moho
slabsurface
dVs/Vs
fast
slow
et al: Abers, Rondenay, Fischer
Conversion widths in stacked receiver functions
• Sharp discontinuities or gradients?(compositional or thermal?)
lag from conversion, sec
Back-arcMoho
Blue: data stack .03-1 Hz; Red: best-fit Gaussian
w = 1.9 sRmax = 7-8 km
Compositional?w = 1.6 sRmax = 5-8 km
Thermal?w = 6.1 sRmax=17-30 km
Receiver functions
w
R = 1/2fmx|T| ~ max. width of boundary, km
(MacKenzie et al., submitted, 2009)
