|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
1 Géosciences Azur (UPMC-IRD-CNRS), BP48, 06235, Villefranche/Mer, France
2 CNRS-UBO Domaines Océaniques, Place Copernic, 29280 Plouzané, France
3 Géosciences Azur (UPMC-IRD-CNRS), BP48, 06235, Villefranche/Mer, France
4 Institut de Physique du Globe de Paris, 4 place Jussieu, 75252 Paris, France
5 Instituto de Geología, Universidad Nacional Autónoma de México, AP 1039, 83000, Hermosillo, Sonora, Mexico
6 Instituto de Geofisica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Mexico D.F
7 Géosciences Azur (UPMC-IRD-CNRS), BP48, 06235, Villefranche/Mer, France
8 Instituto de Geofisica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Mexico D.F
9 Ifremer, BP 70, 29280 Plouzané, France
10 Instituto de Geofisica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Mexico D.F
11 Géosciences Azur (UPMC-IRD-CNRS), BP48, 06235, Villefranche/Mer, France
The interaction of the Pacific-Farallon spreading centers with the North American convergent margin off Baja California, Mexico, supposedly ceased at 12 Ma, when plate convergence and seafloor spreading stopped. We propose a new geodynamic evolution based on full bathymetry coverage and magnetic profiles from 23°N to 27°N (Famex cruise of the R/V L'Atalante, April 2002). The data unveil a major clockwise rotation of the Pacific-Farallon spreading direction, starting ca. 14 Ma, that formed a series of short spreading centers that became extinct ca. 8–7 Ma. We suggest that the transcurrent motion between the Pacific and North America along Baja California was accommodated by seafloor spreading and oblique convergence along the trench. This change in spreading direction was followed by a concomitant progressive demise of both Pacific-Farallon seafloor spreading and Farallon–North America subduction that are attributed to the break-off of the Farallon slab. This also resulted in the opening of a trench-parallel slab window beneath Baja California.
Key Words: slab-window • Pacific-Farallon oceanic ridge • trench-spreading center interaction • Mexico
This article has been cited by other articles:
|
|
 |
|
  R. C. Maury, T. Calmus, C. Pallares, M. Benoit, M. Gregoire, A. Aguillon-Robles, H. Bellon, and M. Bohn Origin of the adakite-high-Nb basalt association and its implications for postsubduction magmatism in Baja California, Mexico: Discussion Geological Society of America Bulletin, September 1, 2009; 121(9-10): 1465 - 1469. [Full Text] [PDF]
|
|
|
|
 |
|
 C. Plattner, R. Malservisi, and R. Govers On the plate boundary forces that drive and resist Baja California motion Geology, April 1, 2009; 37(4): 359 - 362. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. R. Vidal Solano, H. Lapierre, J. M. Stock, A. Demant, F. A. Paz Moreno, D. Bosch, P. Brunet, and A. Amortegui Isotope geochemistry and petrogenesis of peralkaline Middle Miocene ignimbrites from central Sonora: relationship with continental break-up and the birth of the Gulf of California Bulletin de la Societe Geologique de France, September 1, 2008; 179(5): 453 - 464. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Calmus, C. Pallares, R. C. Maury, H. Bellon, E. Perez-Segura, A. Aguillon-Robles, A.-L. Carreno, J. Bourgois, J. Cotten, and M. Benoit Petrologic diversity of Plio-Quaternary post-subduction volcanism in northwestern Mexico: An example from Isla San Esteban, Gulf of California Bulletin de la Societe Geologique de France, September 1, 2008; 179(5): 465 - 481. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. R. Castillo Origin of the adakite-high-Nb basalt association and its implications for postsubduction magmatism in Baja California, Mexico Geological Society of America Bulletin, March 1, 2008; 120(3-4): 451 - 462. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. M. Fletcher, M. Grove, D. Kimbrough, O. Lovera, and G. E. Gehrels Ridge-trench interactions and the Neogene tectonic evolution of the Magdalena shelf and southern Gulf of California: Insights from detrital zircon U-Pb ages from the Magdalena fan and adjacent areas Geological Society of America Bulletin, November 1, 2007; 119(11-12): 1313 - 1336. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 F. Michaud, T. Calmus, J.-Y. Royer, M. Sosson, B. Bandy, C. Mortera-Gutierrez, J. Dyment, F. Bigot-Cormier, A. Chabert, and J. Bourgois Right-lateral active faulting between southern Baja California and the Pacific plate: The Tosco-Abreojos fault Geological Society of America Special Papers, January 1, 2007; 422(0): 287 - 300. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. M. Frey, R. A. Lange, C. M. Hall, H. Delgado-Granados, and I. S.E. Carmichael A Pliocene ignimbrite flare-up along the Tepic-Zacoalco rift: Evidence for the initial stages of rifting between the Jalisco block (Mexico) and North America Geological Society of America Bulletin, January 1, 2007; 119(1-2): 49 - 64. [Abstract] [Full Text] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
