Kinematic model for evolution of a transtensional basin from transform fault whose initial displacement is purely strike-slip
- Univ. of Wisconsin, Milwaukee (USA)
In this study, a synthetic transform fault between the Pacific and North American plates was modeled. The fault trace coincided with a small circle around the North American-Pacific relative pole at the time the Gulf of California began to open, about 6 Ma. Displacement along the fault from 6 Ma to today was simulated with the cycloid model. A transtensional gap developed along the southern reach of the fault, and the northern segment of the fault was transpressional. The gap simulated by the model is similar in shape and magnitude to the gap represented by the observed Gulf of California and Salton Trough. In contrast, neither transpression nor transtension would occur along this fault if finite relative plate motion had occurred around a fixed pole of rotation throughout the past 6 m.y. The cycloid model provides an improved method of kinematic modeling for basins whose evolution is closely linked to the finite relative motion of plates.
- OSTI ID:
- 5557959
- Report Number(s):
- CONF-8909166--
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (USA), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (USA) Vol. 73:8; ISSN AABUD; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
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