Characterization of Impact Breccias Of the Chicxulub Crater - Drilling Projects, Geophysical Surveys, Well-Logging and Physical Properties <p> HR: <span class="hr"> 08:30h<br></span> AN: <span class="an"> P11A-01 INVITED <a href="../absbook/sm05_P11A.html">[Abstracts]</a><br></span> TI: <span class="ti"> Characterization of Impact Breccias Of the Chicxulub Crater - Drilling Projects, Geophysical Surveys, Well-Logging and Physical Properties <br></span> AU: <span class="au"> * Fucugauchi, J U<br></span> EM: <span class="em"> juf@geofisica.unam.mx<br></span> AF: <span class="af"> Laboratorio de Paleomagnetismo y Geof¡sica Nuclear, Instituto de Geofisica, UNAM, Circuito Institutos s/n, Mexico, DF 06140 Mexico <br></span> AU: <span class="au"> Soler-Arechalde, A M<br></span> EM: <span class="em"> anesoler@geofisica.unam.mx<br></span> AF: <span class="af"> Laboratorio de Paleomagnetismo y Geof¡sica Nuclear, Instituto de Geofisica, UNAM, Circuito Institutos s/n, Mexico, DF 06140 Mexico <br></span> AU: <span class="au"> Rebolledo-Vieyra, M <br></span> EM: <span class="em"> marior@cicy.mx<br></span> AF: <span class="af"> Centro de Estudios del Agua Centro de Investigaci¢n Cient¡fica de Yucat n, A.C. Unidad Quintana Roo , Calle 21 Norte, Lote 39 Manzana 26, Super Manzana 64 Benito Ju rez, Quintana Roo,, Benito Juarez, QR 77500 Mexico AB: <span class="ab"> We report on the characterization of the impact breccia sequence from the Chicxulub crater in the Yucatan peninsula. The sequence has been sampled in several parts in the southern sector within and outside the basin. As part of the international collaboration, a comprehensive project CSDP to study the Chicxulub impact crater that included geophysical surveys, drilling with continuous coring and well-logging has been completed. The Chicxulub crater has been the subject of offshore and onshore studies by several research groups, which permitted to image the underground structure. The CSDP drilling project is built on early exploratory drilling by the Mexican oil company Pemex, and the UNAM Shallow Drilling Program. The proposed deep drilling site is located between Pemex wells Yucatan-6 and Ticul-1, to the north of UNAM-5 well. Only intermittent cores were recovered in the oil exploratory wells, and continuous core recovery had been implemented in the UNAM and CSDP projects. The proposed location allows use of well logs, biostratigraphic and lithologic information. UNAM wells are also located on the southern outside sector of the basin, close to and south of Ticul-1 well. Three of these wells (UNAM-5, UNAM-6 and UNAM-7) sampled the impact breccia sequence. Deep drilling down to 1.5 km sampled the Tertiary carbonate sequence and the impact breccias. Available geophysical data are integrated with the borehole information to aid in planning the pre-site geophysical studies that include gravity, magnetics and magnetotelluric surveys. <br></span> DE: <span class="de"> 1219 Local gravity anomalies and crustal structure<br></span> DE: <span class="de"> 1517 Magnetic anomaly modeling<br></span> DE: <span class="de"> 1519 Magnetic mineralogy and petrology<br></span> DE: <span class="de"> 1520 Magnetostratigraphy<br></span> SC: <span class="sc"> Planetary Sciences [P]<br></span> MN: <span class="mn"> 2005 Joint Assembly<br></span></p></body></html>