Three-dimensional thermal structure of the Chinese continental crust and upper mantle

We invert S-wave velocities for the 3D upper-mantle temperatures, in which the position with a temperature crossing the 1300℃ adiabat is corresponding to the top of the seismic low velocity zone. The temperatures down to the depth of 80 km are then calculated by solving steady-state thermal conducti...

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Bibliographic Details
Published in:Science China. Earth sciences 2007-09, Vol.50 (10), p.1441-1451
Main Authors: An, MeiJian, Shi, YaoLin
Format: Article
Language:English
Subjects:
China
Continental crust
crust
Geology
Heat flow
Low temperature
mantle
Plate tectonics
seismic
Surface temperature
temperature
upper
Upper mantle
velocity
Wave velocity
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Summary:We invert S-wave velocities for the 3D upper-mantle temperatures, in which the position with a temperature crossing the 1300℃ adiabat is corresponding to the top of the seismic low velocity zone. The temperatures down to the depth of 80 km are then calculated by solving steady-state thermal conduction equation with the constraints of the inverted upper-mantle temperatures and the surface temperatures, and then surface heat flows are calculated from the crustal temperatures. The misfit between the calculated and observed surface heat flow is smaller than 20% for most regions. The result shows that, at a depth of 25 km, the crustal temperature of eastern China (500―600℃) is higher than that of western China (
ISSN:1674-7313
1006-9313
1869-1897
1862-2801
DOI:10.1007/s11430-007-0071-3