HR: 16:30h
AN: GP34A-05    [Abstracts]
TI: Towards the determination of Mesoamerican chronology: Past and present of archeomagnetic studies in Mexico
AU: * SOLER, A
EM: anesoler@geofisica.unam.mx
AF: INSTITUTO DE GEOFISICA, UNAM, CIUDAD UNIVERSITARIA S/N, DEL. COYOACAN, MEXICO DF, DF 06140 Mexico
AU: GOGUITCHAISHVILI, A
EM: avto@geofisica.unam.mx
AF: INSTITUTO DE GEOFISICA, UNAM, CIUDAD UNIVERSITARIA S/N, DEL. COYOACAN, MEXICO DF, DF 06140 Mexico
AU: Urrutia-Fucugauchi, J
EM: juf@geofisica.unam.mx
AF: INSTITUTO DE GEOFISICA, UNAM, CIUDAD UNIVERSITARIA S/N, DEL. COYOACAN, MEXICO DF, DF 06140 Mexico
AB: Until recently, only few reliable archeomagnetic studies were available for Mesoamerica. The most detailed work was carried out by Wolfmann (1973, 1981, 1990) who reported preliminary results of the archaeomagnetic dating project of Central America, which was directed to re-asses the Mesoamerican relative and absolute chronology in a period from the year AD 0 to 1200. The value of the reference curve, however, is limited, since the specimens were not demagnetized and the magnetic mineralogy was not investigated. Moreover, in most of cases, ages were estimated only on the grounds of archeological stratigraphy. As part of their efforts to study the details of the magnetic properties of Mesoamerican rich cultural heritage, the detailed archeomagnetic works has been done at different places in Mexico and Central America. These investigations include the study of both conventional (kilns, potteries, human shelters.) and non-conventional (lime plasters, mural and cave paintings.) materials. First archeomagnetic reference curve for Mesoamerica is now available from the year AD 0 to 1200. Some preliminary archeointensity determinations were carried on selected samples yielding rather encouraging results.
DE: 1503 Archeomagnetism
DE: 1522 Paleomagnetic secular variation
DE: 1540 Rock and mineral magnetism
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2005 Joint Assembly