Paleomagnetic Study of the Zihuatanejo-Papanoa Sector of the Pacific continental margin of Southern Mexico - Continental Margin Truncation and Migration of Magmatism <p> HR: <span class="hr"> 0830h<br></span> AN: <span class="an"> GP41A-07 <a href="../absbook/sm05_GP41A.html">[Abstracts]</a><br></span> TI: <span class="ti"> Paleomagnetic Study of the Zihuatanejo-Papanoa Sector of the Pacific continental margin of Southern Mexico - Continental Margin Truncation and Migration of Magmatism <br></span> AU: <span class="au"> * Urrutia Fucugauchi, J <br></span> EM: <span class="em"> juf@geofisica.unam.mx<br></span> AF: <span class="af"> Instituto de Geofisica, UNAM, Ciudad Universitaria s/n, Mexico <br></span> AU: <span class="au"> Zhao, X <br></span> EM: <span class="em"> xzhao@es.ucsc.edu<br></span> AF: <span class="af"> Earth Science Dept. UCSC, Santa Cruz, California, United States <br></span> AU: <span class="au"> Girdler, S <br></span> EM: <span class="em"> gilder@ipgp.jussieu.fr<br></span> AF: <span class="af"> Paleomagnetic Lab. IPGP, Paris, France, France <br></span> AU: <span class="au"> Coe, R <br></span> EM: <span class="em"> rcoe@es.ucsc.edu<br></span> AF: <span class="af"> Earth Science Dept. UCSC, Santa Cruz, California, United States <br></span> AU: <span class="au"> Gogichaishvili, A <br></span> EM: <span class="em"> avto@geofisica.unam.mx<br></span> AF: <span class="af"> Instituto de Geofisica, UNAM, Ciudad Universitaria s/n, Mexico <br></span> AB: <span class="ab"> Studies of the western North American continental margin have highlighted the role of terrane accretion, northward translation of margin slivers, oceanic/continental plate interactions, plate subduction, magmatism, extension and vertical axis rotations on its tectonic evolution during the Mesozoic and Cenozoic. The western Pacific margin of Mexico has been proposed as a source region for some of the far-traveled terranes, and it may have been formed by terranes accreted during the Late Cretaceous-Early Tertiary. The Guerrero terrane forms most of the continental margin (being the largest terrane of western North America) and is characterized by island arc assemblages. This study concentrates on the Jalisco block, which forms the western part or of the Guerrero terrane and has been considered a separate tectonic entity bordered by two continental rifts. Formation of the Gulf of California in the past 4.6 Ma fragmented and rifted apart two large fragments of a larger paleo-Jalisco block. <br></span> DE: <span class="de"> 1500 GEOMAGNETISM AND PALEOMAGNETISM<br></span> DE: <span class="de"> 1519 Magnetic mineralogy and petrology<br></span> DE: <span class="de"> 1520 Magnetostratigraphy<br></span> DE: <span class="de"> 1525 Paleomagnetism applied to tectonics (regional, global)<br></span> DE: <span class="de"> 1527 Paleomagnetism applied to geologic processes<br></span> SC: <span class="sc"> Geomagnetism and Paleomagnetism [GP]<br></span> MN: <span class="mn"> 2005 Joint Assembly<br></span></p></body></html>