Measurements and modelling of possible mantle constituents from a long-line seismic refraction experiment in the West Philippine Basin

Autor: Dean Goodman, L. Dale Bibee
Rok vydání: 1991
Předmět:
Zdroj: Geophysical Journal International. 106:667-675
ISSN: 1365-246X
0956-540X
DOI: 10.1111/j.1365-246x.1991.tb06338.x
Popis: SUMMARY A long-line seismic refraction experiment extending to a range of 500 km was conducted in the West Philippine Sea. The refraction data corrected for crustal delays are used to estimate the velocity structure in the upper lithosphere. The seismic structure is converted to velocity versus pressure using a simple overburden formula. West Philippine Sea velocity-pressure data are compared with possible mantle constituents. Compositional models indicate that the velocity structure is between eclogite and eclogite-dunite type phases listed in Christensen (1974), before correcting for temperature. However, correcting the velocity data for the possible mantle constituents to the steady-state temperature estimated for the basin, indicates that the West Philippine Sea upper mantle has much higher seismic gradients than those predicted for any of the single phase components.
Databáze: OpenAIRE
Externí odkaz: