Geochemical mapping of New Mexico, USA, using stream sediment data |
| |
| Authors: | Taisser Zumlot Philip Goodell and Fares Howari |
| |
| Institution: | (1) Center for Environmental Resource Management (CERM), University of Texas at El Paso, El Paso, TX 79968, USA;(2) Department of Geological Sciences, University of Texas at El Paso, El Paso, TX 79968, USA;(3) Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78758, USA; |
| |
| Abstract: | The spatial analysis of geochemical data has several environmental and geological applications. The present study investigated
the regional distribution of Al, Ba, Ca, Ce, Co, Cr, Cu, Fe, K, La, Li, Mg, Mn, Na, Ni, Pb, Sc, Th, Ti, U, V, and Zn elements
in stream sediment samples from New Mexico State. These elements were studied in order to integrate them with geological and
environmental characteristics of the area. Data are used from 27,798 samples that were originally collected during the national
uranium resource evaluation (NURE) Hydrogeochemical and stream sediment reconnaissance (HSSR) program in the 1970s. The original
data are available as U.S. Geological Survey Open-File Report 97-492. The study used a variety of data processing and filtering
techniques that included univariate, bivariate, factor analyses and spatial analyses to transform the data into a useable
format. Principal component analysis and GIS techniques are applied to classify the elements and to identify geochemical signatures,
either natural or anthropogenic. The study found that the distribution of the investigated elements is mainly controlled by
the bed rock chemistry. For example, along the Rio Grande rift and Jemez lineament a strong association between Co, Cr, Cu,
Fe, Ni, Sc, Ti, V and Zn was observed and indicates that elements distribution in the area controlled by the mafic factor.
The rare earth elements (REE) factor which is consists of Ce, La and U, also has strong, localized, clusters in the felsic
centers in New Mexico. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
