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Nicaragua Migration Image MARGINS/TUCAN 2004-6

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

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Nicaragua Migration Image MARGINS/TUCAN 2004-6

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  1. Nicaragua Migration ImageMARGINS/TUCAN 2004-6 (MacKenzie et al., submitted, 2009) Moho fast slab surface dVs/Vs slow et al: Abers, Rondenay, Fischer

  2. (MacKenzie et al., submitted, 2009) Conversion widths in stacked receiver functions Receiver functions w = 1.9 s Rmax = 7-8 km Back-arc Moho w = 1.6 s Rmax = 5-8 km Compositional? w = 6.1 s Rmax=17-30 km Thermal? • Sharp discontinuities or gradients? • (compositional or thermal?) w lag from conversion, sec R = 1/2fmx|T| ~ max. width of boundary, km Blue: data stack .03-1 Hz;Red: best-fit Gaussian

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