Paleomagnetic Data and the Accretion of the Guerrero Terrane, Southern Mexico Continental Margin

  1. John W. Hillhouse
  1. H. Böhnel1,
  2. L. Alva-Valdivia1,
  3. S. Gonzalez-Huesca1,
  4. J. Urrutia-Fucugauchi1,
  5. D. J. Moran-Zenteno1 and
  6. P. Schaaf2

Published Online: 18 MAR 2013

DOI: 10.1029/GM050p0073

Deep Structure and Past Kinematics of Accreted Terranes

Deep Structure and Past Kinematics of Accreted Terranes

How to Cite

Böhnel, H., Alva-Valdivia, L., Gonzalez-Huesca, S., Urrutia-Fucugauchi, J., Moran-Zenteno, D. J. and Schaaf, P. (1989) Paleomagnetic Data and the Accretion of the Guerrero Terrane, Southern Mexico Continental Margin, in Deep Structure and Past Kinematics of Accreted Terranes (ed J. W. Hillhouse), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM050p0073

Author Information

  1. 1

    Instituto de Geofisica, Universidad Nacional Autonoma de Mexico, Del. Coyoacan, 04510 D.F., Mexico

  2. 2

    Mineralogisch Petrologisches Institut, Ludwig-Maximilians Universität, Theresienstr. 41, D-8000 München 2, Federal Republic of Germany

Publication History

  1. Published Online: 18 MAR 2013
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780875904542

Online ISBN: 9781118666609

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Keywords:

  • Geology, Structural—Congresses;
  • Geodynamics—Congresses;
  • Earth—Crust—Congresses

Summary

The southern Mexico continental margin has characteristics of a truncated composite margin for which both right- and left-lateral displacements of major blocks such as Baja California peninsula and northern Central America have been suggested. We present detailed paleomagnetic results for more than 1000 samples from over 100 sites in different intrusive, volcanic, and sedimentary units exposed along the southern Mexico continental margin. The data are used to study the accretion history of the Guerrero terrane and subsequent movements of the margin. Results show evidence of a complex evolution in which some areas have experienced localized tectonic rotations of varying degree but no significant latitudinal displacements. The Guerrero terrane very likely originated as a series of island arcs which were later accreted to the margin without significant latitudinal change. The accretion process resulted in deformation of the volcano-sedimentary assemblage, local rotations and variable low-degree metamorphism.