| Abstract: | Using California as a test region, we have examined the feasibility of using Curie-isotherm depths, estimated from magnetic anomalies, as a proxy for lithospheric thermal structure. Our method follows previous studies by dividing a regional aeromagnetic database into overlapping subregions and analyzing the power-density spectrum of each subregion, but we have improved on previous studies in two important ways: We increase subregion dimensions in a stepwise manner until long-wavelength anomalies are appropriately sampled, and each subregion spectrum determined from the magnetic anomalies is manually fit with a theoretical expression that directly yields the depth to the bottom of the magnetic layer. Using this method, we have obtained Curie-isotherm depths for California that show a general inverse correlation with measured heat flow, as expected. The Coast Ranges of California are characterized by high heat flow (80-85 mW/m2) and shallow Curie depths (20-30 km), whereas the Great Valley has low heat flow (less than 50 mW/m2) and deeper Curie depths (30-45 km). ?? 2006 Society of Exploration Geophysicists. |
| Genre: | Article |
| ProdID: | 70028398 |
| Citation Author: | Ross, H. E.; Blakely, R. J.; Zoback, M. D. |
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| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geophysics |
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| Citation Search Results Text: | Testing the use of aeromagnetic data for the determination of Curie depth in California; 2006; Article; Journal; Geophysics; Ross, H. E.; Blakely, R. J.; Zoback, M. D. |
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| Citation Volume: | 71 |
| Citation Year: | 2006 |
| Type: | citation/reference |
| Text: | Testing the use of aeromagnetic data for the determination of Curie depth in California; 2006; Article; Journal; Geophysics; Ross, H. E.; Blakely, R. J.; Zoback, M. D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1190/1.2335572 |
| Date Other: | Sun, 1 Jan 2006 00:00 -0600 |
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