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Structural and Seismic Stratigrapic study in the Center of the Magdalena Shelf in the Western Margin of Baja California Based on Seismic Reflection Data

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Abstract

The Magdalena Shelf is a shallow, low-relief surface located along the Baja California Pacific margin. As part of a forearc basin, the shelf was a convergent margin setting before the oblique divergent plate boundary formed in the Gulf of California at 12 Ma. It is thought that since 12–8 Ma, this basin has been a transtensional or strike–slip basin. To constrain the geometry, structural characteristics and some stratigraphic relationships, an active-source, seismic-reflection study was carried out in the central part of the shelf. As a result, the analyzed data show faults, basins and unconformities. Two out of four observed basins are clearly controlled by the Santa Margarita and San Lázaro faults that dip ~40° NE; a third basin is controlled by the Tosco-Abreojos fault. These three basins are part of the deformation zone that is associated with the Tosco-Abreojos fault system. The Iray-Margarita basin, on the other hand, is a fourth basin located at the northeast sector of the study area. An additional feature observed is a stepover lying between the overlapping ends of the Santa Margarita and San Lázaro faults. Small faults oriented sub-parallel to the above major faults are present, mainly throughout the western sector of the study area. Some of those minor faults cut through the seafloor indicating recent tectonic activity. Santa Margarita, San Lázaro and Tosco-Abreojos are also the names given to half-grabens controlled by the active faults that have the same names. The first two basins are affected by many more small faults in comparison with what we see in the third basin. Tectonically, this means that those two basins are the more active in the area of study. In all four basins, the upper seismic sequence consists of sediments controlled by faults of Neogene age. We found that the Iray-Santa Margarita basin is the deepest of all four basins (beyond the resolution of the data, >5 km), and lack of minor faults there indicates that the basin is not tectonically active. Two unconformities are present in the region, unconformity-1 of Miocene age and unconformity-2 of Paleocene-Eocene and Cretaceous ages. Unconformity-1 is present in the entire region, while Unconformity-2 is present mainly in the Iray-Magdalena and San Lázaro basins. In the Iray-Magdalena basin the sedimentary sequences show an uplift that took place in late Jurassic time along its western portion. We also see that moderate compressive deformation increases gradually from west to east. A chaotic-reflector oriented NW–SE is observed with an irregular shape in all regions. It shows very superficial in some places, sub-parallel to the major faults and in association with the subduction complex. Seismic activity reported for the region showed a strong correlation with the fault plane of the Santa Margarita fault, indicating that the Tosco-Abreojos deformation zone is ~90 km wide in the area. Finally, the Santa Margarita fault should be considered in future hazard-risk assessments because of their proximity to Puerto San Carlos. As it has been reported, local seismic events (M < 4) have generated alarm in the local populace, as well as soil liquefaction and minor damage to structures in the region.

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References

  • Bohannon, R. G., & Parsons, T. (1995). Tectonic implications of post-30 Ma Pacific and North American relative plate motions. Geological Society of America Bulletin, 107(8), 937–959.

    Article  Google Scholar 

  • Bonini, J. A., & Baldwin, S. L. (1998). Mesozoic metamorphic and middle to late Tertiary magmatic events on Magdalena and Santa Margarita Islands, Baja California Sur, Mexico: Implications for the tectonic evolution of the Baja California continental borderland. Geological Society of America Bulletin, 110(8), 1094–1104.

    Article  Google Scholar 

  • Brothers, D., Harding, A., González-Fernández, A., Holbrook, W. S., Kent, G., Driscoll, N., et al. (2012). Farallon slab detachment and deformation of the Magdalena Shelf, southern Baja California. Geophysical Research Letters, 39(9), 1–7. doi:10.1029/2011GL050828.

    Article  Google Scholar 

  • Calmus, T., Pallares, C., Maury, R. C., Agillón-Robles, A., Bellon, H. M., Benoit, M., et al. (2011). Volcanic markers of the post-subduction evolution of Baja California and Sonora, Mexico: Slab tearing versus lithospheric rupture of the Gulf of California. Pure and Applied Geophysics, 168(8–9), 1303–1330. doi:10.1007/s00024-010-0204-z.

    Article  Google Scholar 

  • Dickinson, W.R. (1995). Forearc basins. Tectonic and sedimentary basins. In Busby, C. & Antonio Azor, A., (Eds), Wiley-Blackwell Books, 221–261.

  • Dickinson, W. R., Armin, R. A., Beckvar, N., Goodlin, T. C., Janecke, S. U., Mark, R. A., et al. (1987). Geohistory analysis of rates of sediment accumulation and subsidence for selected California basins. In R. V. Ingersoll & W. G. Ernst (Eds.), Cenozoic basin development of coastal California (pp. 1–23). Prentice-Hall, Rubey, VI: Inglewood Cliffs.

    Google Scholar 

  • Dickinson, W. R., & Seely, D. R. (1979). Structure and stratigraphy of forearc regions. American Association of Petroleum Geologists Bulletin, 63, 2–31.

    Google Scholar 

  • Fletcher, J.M., Eakins, B.A., Sedlock, R.L., Mendoza-Borunda, R., Walter, R.C., Edwards, R.L., & Dixon, T.H. (2000). Quaternary and Neogene slip history of the Baja-Pacific plate margin: Bahia Magdalena and the southwestern borderland of Baja California: Eos (Transactions, American Geophysical Union), 81, F1232.

  • Fletcher, J. M., Grove, M., Kimbrough, D., Lovera, O., & Gehrels, G. E. (2007). 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, 119(11–12), 1313–1336.

    Article  Google Scholar 

  • García-Domínguez, G. (1976). Prospección Geológica en Baja California. II Simposium de geología de Subsuelo. Superintendencia General de Exploración-Pemex.

  • Hagstrum, J. T., & Sedlock, R. L. (1998). Remagnetization of Cretaceous forearc strata on Santa Margarita and Magdalena Islands, Baja California Sur: implications for northward transport along the California margin. Tectonics, 17(6), 872–882.

    Article  Google Scholar 

  • Humphreys, E. D., & Weldon II, R. J. (1991). Kinematic constraints on the rifting of Baja California. In J. P. Dauphin & B. R. T. Simoneit (eds.) The Gulf and Peninsular Province of the Californias, American Association of Petroleum Geologists, Memoir 47, 217–229.

  • Ingersoll, R. V. (1979). Evolution of the Late Cretaceous forearc basin, northern and central California. Geological Society of America Bulletin, 90, 813–826.

    Article  Google Scholar 

  • Ingersoll, R.V. (1982). Initiation and evolution of the Great Valley forearc basin of northern and central California, U.S.A. In J. K. Leggett (ed.) Trench-forearc geology: sedimentation and tectonics on modern and active plate margins. Geological Society of London, Special Publication, 10, 459–467.

  • Ingersoll, R.V. (2000). Models for origin and emplacement of Jurassic ophiolites of northern California. In Y. Dilek, E. M. Moores, D. Elthon, & A. Nicolas (eds.) Ophiolites and oceanic crust: new insights from field studies and the Ocean Drilling Program. Geological.

  • Ingersoll, R.V., & Busby, C. (1995). Tectonics of sedimentary basins. In C. J. Busby, & R. V. Ingersoll (eds.) Tectonics of sedimentary basins. Oxford, Blackwell Science, pp. 1–51.

  • Keary and Vine, 1990, Global Tectonics. Blackwell Oxford, 302.

  • Legg, M.R., Wong, O., & Suarez, V. (1991). Geologic structure and Tectonics of the Inner Continental Borderland of the Northern Baja California. In J. P. Dauphin, & B. Simoneit (eds.) The Gulf and Peninsular Province of the Californias, AAPG Memoir, 47, 145–196.

  • Mammerickx, J., & Klitgord, K. D. (1982). Northern East Pacific Rise: evolution from 25 m.y. to the present. Journal of Geophysical Research, 87, 6751–6759.

    Article  Google Scholar 

  • Michaud, F., Calmus, T., Ratzov, G., Royer, J.-Y., Sosson, M., Bigot-Cormier, F., et al. (2011). Active deformation along the southern end of the Tosco-Abreojos fault system: new insights from multibeam swath bathymetry. Pure and Applied Geophysics, 168(8–9), 1363–1372. doi:10.1007/s00024-010-0193-y.

    Article  Google Scholar 

  • Michaud, F., Calmus, T., Royer, J.-Y., Sosson, M., Bandy, B., Mortera-Gutierrez, C., Dyment, J., Bigot-Cormier, F., Chabert, A., & Bourgois, J. (2007). Right lateral active faulting between southern Baja California and the Pacific plate: the Tosco-Abreojos fault, In S. A. Alanis-Alvarez & A. F. Nieto-Samaniego (eds.), Celebrating the centenary of the geological society of Mexico: Geological Society of America, special paper 422, 287–300. doi:10.1130/2007.2422(09).

  • Michaud, F., Calmus, T., Sosson, M., Royer, J.-Y., Bourgois, J., Chabert, A., et al. (2005). La zona de falla Tosco-Abreojos: un sistema lateral derecho activo entre la placa Pacifico y la península de Baja California. Boletín de la Sociedad Geológica Mexicana. Tomo LVII, 1, 53–63.

    Google Scholar 

  • Michaud, F., Royes, J. Y., Bourgois, J., Dyment, J., Calmus, T., Bandy, M., et al. (2006). Oceanic-ridge subduction vs. slab break off: plate tectonic evolution along the Baja California Sur continental margin since 15 Ma. Geology, 34(1), 13–16. doi:10.1130/g22050.1.

    Article  Google Scholar 

  • Michaud, F., Sosson, M., Royer, J.-Y., Chabert, A., Bourgois, J., Calmus, T., et al. (2004). Motion partitioning between the Pacific plate, Baja California and the North America plate: the Tosco-Abreojos fault revisited. Geophysical Research Letters, 31, L08604. doi:10.1029/2004GL019665.

    Article  Google Scholar 

  • Munguia, L., González-Escobar, M., Navarro, M., Valdez, T., Mayer, S., Aguirre, A., Wong, V., Luna, M. (2015b). Active crustal deformation in the area of San Carlos, Baja California Sur, Mexico as shown by data of Local Earthquake Sequences. Pure and Applied Geophysics. doi:10.1007/s00024-015-1217-4. Published online: 15 December 2015.

  • Munguía, L., Mayer, S., Aguirre, A., Méndez, I., González-Escobar and M., Luna, M. (2015a). The 2006 Bahía Asunción earthquake swarm: Seismic evidence of active deformation along the western margin of Baja California Sur, Mexico. Pure and Applied Geophysics. doi:10.1007/s00024-015-1184-9. Published online: 26 October 2015.

  • Nicholson, C., Sorlien, C. H. C., Atwater, T., Crowell, J. C., & Luyendyk, B. P. (1994). Microplate capture, rotation of the western Transverse Ranges, and initiation of the San Andreas transforms as a low-angle fault system. Geology, 22, 491–495.

    Article  Google Scholar 

  • Normark, W.R., Spencer, J.E., Ingle, J. (1987). Geology and Neogene history of the Pacific C continental margin of Baja California Sur, Mexico, In D. W. Scholl (ed.), Geology and resource potential of the continental margin of western North America and adjacent ocean basins—Beaufort Sea to Baja California: Houston, Texas, Circum-Pacific Counsel for Energy and Mineral Resources, Earth Science Series, 6, pp. 449–472.

  • Plattner, C., Malservisi, R., Dixon, T., Lafemina, P., Sella, G., Fletcher, J. M., et al. (2007). New constraints on relative motion between the Pacific plate and Baja California microplate (Mexico) from GPS measurements. Geophysical Journal International, 170(3), 1373–1380.

    Article  Google Scholar 

  • Plattner, C., Malservisi, R., & Govers, R. (2009). On the plate boundary forces that drive and resist Baja California motion. Geology, 37(4), 359–362.

    Article  Google Scholar 

  • Sangree, J. B., & Widmier, J. M. (1977). Seismic stratigraphy and global changes of sea level, Part 9: seismic interpretation of clastic depositional facies. In Charles E. Payton (Ed.), Seismic Stratigraphy–applications to hydrocarbon exploration, AAPG Memoir 26. Tulsa: AAPG.

    Google Scholar 

  • Sedlock, R.L. (1993). Mesozoic geology and tectonics of blueschist and associated oceanic terranes in the Cedros-Vizcaino-San Benito and Magdalena-Santa Margarita regions, Baja California, Mexico, in Mesozoic Paleogeography of the Western Unitd States, Vol. II. In G.C. Dunne & K.A. McDugall (Eds.), Society of Economic Paleontologists and Mineralogists, Pacific Section, (pp.113–125). Los Angeles, CA.

  • Spencer, J. E., & Norwark, W. (1979). Tosco-Abreojos fault zone: a Neogene transform plate boundary within the Pacific margin of southern Baja California, Mexico. Geology, 7, 554–557.

    Article  Google Scholar 

  • Umhoefer, P. J., Dorsey, R. J., Willsey, S., Mayer, L., & Renne, P. (2001). Stratigraphy and geochronology of the Comondú Group near Loreto, Baja California sur, Mexico. Sedimentary Geology, 144, 125–147.

    Article  Google Scholar 

  • Yeats, R.S., Haq, B.U., Barron, J.A., Couch, J., Denham, C., Douglas, A.G., Grechin, V.I., Leinnen, M., Niem, A., Palverma, S., Pisciotto, K.A., Poore, R.Z., Shibata, T., & Wolfart, R. (1981). Initial reports of the Deep Sea Drilling Project: Washington, D.C., U.S. Government Printing Office, p. 967.

  • Yilmaz, O. (2001). Seismic Data Analysis. Investigations in Geophysics, Society of Exploration Geophysicists. Second Edition. Tulsa, p. 1000.

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Acknowledgments

We thank PEMEX and Ing. Antonio Escalera for permission to publish these results (PEP-DE-35-2015). This research was funded by a PEMEX contract to CICESE. The Landmark University Grant Program (2008-UGP-008005 to CICESE), OpendTect V5.0 provided licenses for the use of software and Google Earth Pro grant Educators. Discussions with Ramón Mendoza and Clemente Gallardo are acknowledged. We thank Sergio Arregui and Martin Pacheco-Romero for technical support. Constructive comments and suggestions by Dr. William Bandy and two anonymous reviewers were helpful in improving the manuscript.

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González-Escobar, M., Salazar-Cárdenas, R.M., Munguía, L. et al. Structural and Seismic Stratigrapic study in the Center of the Magdalena Shelf in the Western Margin of Baja California Based on Seismic Reflection Data. Pure Appl. Geophys. 173, 3645–3661 (2016). https://doi.org/10.1007/s00024-016-1396-7

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