| Abstract: | A geographical study of Georges Bank basin defines a deep crustal structure that is interpreted in terms of the basin‘s tectonic and thermal history. Gravity models along three basin cross sections delineate two zones of crustal thinning at the basement hinge zone and oceanic crustal margins. These two zones bound rift-stage crust (about 25 km thick) which underlies the central portion of the basin. Subsidence analysis of the basin, using data from multichannel seismic reflection lines and two COST wells, suggests a rifting and (uniform) extensional origin. Two-dimensional finite difference modeling of the basin defines a crustal structure that concurs with the gravity and subsidence studies. The resulting isotherms show no major changes in the thermal structure since the Late Jurassic. In some areas of the basin, temperature sufficient for oil generation are determined from maturation studies of Jurassic sediments. Hydrocarbon generation is questionable, however, because of the probable lack of proper and sufficient kerogen in the Jurassic deposits. |
| Genre: | Article |
| ProdID: | 70015218 |
| Citation Author: | Swift, B. Ann; Sawyer, D. S.; Grow, J. A.; Klitgord, K. D. |
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| Citation End Page: | 718 |
| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | American Association of Petroleum Geologists Bulletin |
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| Citation Number Of Pages: | 17 |
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| Citation Search Results Text: | SUBSIDENCE, CRUSTAL STRUCTURE, AND THERMAL EVOLUTION OF GEORGES BANK BASIN.; 1987; Article; Journal; American Association of Petroleum Geologists Bulletin; Swift, B. Ann; Sawyer, D. S.; Grow, J. A.; Klitgord, K. D. |
| Citation Start Page: | 702 |
| Citation Volume: | 71 |
| Citation Year: | 1987 |
| Type: | citation/reference |
| Text: | SUBSIDENCE, CRUSTAL STRUCTURE, AND THERMAL EVOLUTION OF GEORGES BANK BASIN.; 1987; Article; Journal; American Association of Petroleum Geologists Bulletin; Swift, B. Ann; Sawyer, D. S.; Grow, J. A.; Klitgord, K. D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1987 00:00 -0600 |
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