Downward continuation and inversion of heat flow data from the colorado plateau and neighboring regions

1985 ◽  
Author(s):  
David M. Jessup ◽  
Jean-Claude Mareschal
Keyword(s):  
Heat Flow ◽  
Colorado Plateau ◽  
Downward Continuation ◽  
Flow Data ◽  
And Inversion

scholarly journals Heat Flow Data in an Area of the Eastern Southern Basin and Range in Arizona Contribute to an Analysis of Neogene Lithosphere Thinning Greater than 100 Km

Lithosphere ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 1-9
Author(s):  
Marshall Reiter
Keyword(s):  
Heat Flow ◽  
Colorado Plateau ◽  
Basin And Range ◽  
Mantle Lithosphere ◽  
Flow Data ◽  
Southern Basin ◽  
Vertical Advection ◽  
Lithosphere Thinning ◽  
Tectonic Development ◽  
Paleotemperature Gradient

Abstract Heat flow data and thermochronologic derived paleotemperature gradient data are examined to calculate heat flow ~25 Ma and, at present, for a southern Basin and Range location north of Tucson, Arizona. An increase in the surface heat flow is estimated from ~25 Ma to the present; changing from ~47 to ~83 mW m-2. Steady-state conduction temperature vs. depth profiles provide estimates of lithosphere thicknesses both for the present and for ~25 Ma. Different heat transfer models for present heat flow predict present LAB depth that agrees with seismic studies. From these temperature profiles, lithosphere thinning from ~184 km to ~70 km is suggested during the Neogene. Mantle lithosphere thinning caused by thermal phenomena is likely a fundamental driving force for southern Basin and Range extension. Because the mantle lithosphere has likely thinned much more than the crust, it is shown that additional vertical advection, such as an asthenosphere plume, delaminating part of the mantle lithosphere, convection cells, and rising magmas along conduits, add to the vertical advection component of upper mantle lithosphere extension. Interestingly, values of heat flow 25 Ma, lithosphere thicknesses 25 Ma, and Neogene lithosphere thinning are somewhat similar for the Four Corners area of the Colorado Plateau and the southern Basin and Range, even though Neogene tectonic development was quite different, i.e., no Neogene extension in the Colorado Plateau vs. ~57% in the southern Basin and Range. Neogene lithosphere thinning phenomena are likely different in the two regions.

Downward continuation of heat flow data

1989 ◽  
Vol 164 (2-4) ◽  
pp. 129-137 ◽  
Author(s):  
J.C. Mareschal ◽  
Y. Hamdani ◽  
D.M. Jessup
Keyword(s):  
Heat Flow ◽  
Downward Continuation ◽  
Flow Data

Thermal evolution of the Sierra Nevada: Tectonic implications of new heat flow data

Tectonics ◽  
1991 ◽  
Vol 10 (2) ◽  
pp. 325-344 ◽  
Author(s):  
Richard W. Saltus ◽  
Arthur H. Lachenbruch
Keyword(s):  
Heat Flow ◽  
Sierra Nevada ◽  
Thermal Evolution ◽  
Flow Data ◽  
Tectonic Implications
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