2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM

Paper No. 1
Presentation Time: 8:00 AM

Environmental Isotopes of Precipitation in West, Central and East Mexico

CORTES, Alejandra1, PEREZ-QUEZADAS, Juan2, PEREZ-VALERA, Joaquin1 and ARAGUAS, Luis3, (1)NATURAL RESOUCES, GEOPHYSICS INSTITUTE, CIRCUITO EXTERIOR, C.U, Mexico, D.F, 04510, Mexico, (2)Posgrado en Ciencias de la Tierra, UNAM, Instituto de Geofisica, Universidad Nacional Autonoma de Mexico, Circuito Exterior, C.U, Mexico, D.F, 04510, Mexico, (3)Section of Isotope Hydrlogy, International Atomic Energy Agency, Wagramerstrasse, 5 P.O. Box 100 (200 for private), Vienna, a-400, Austria, acortes@tonatiuh.igeofcu.unam.mx

Environmental isotopes composition of precipitation contains broadly, the signal of local climate conditions. This work presents the preliminary results of a research project of precipitation, taking place in the West, Central and East Mexico, pretending to interpret the influence of the geographic parameters such as temperature, latitude, altitude, distance from the cost and intensity of the precipitation. The samples were collected from 10 different places from 5 localities. The average altitude ranges from 120 to 4000masl. The collection precipitation years vary from 1999 to 2008. Through this set of data we try to evaluate the changes caused of the local climate and topographic features and how they can modify the general pattern of the isotopic composition. Also we proof that this data presents a good correlation with the equation of the Local Meteoric Water Line proposed earlier, for the Central part of the country.