Cordilleran Section - 108th Annual Meeting (29–31 March 2012)
Paper No. 4-4
Presentation Time: 09:40-10:00


GUTIERREZ, Melida, Geography, Geology and Planning, Missouri State University, 901 S. National Ave, Springfield, MO 65897,

Exploratory Data Analysis (EDA) was applied to sediment geochemical data in order to discriminate between background and anomalous concentrations and to identify possible sources of the anomalies. The data consisted of ca. 3,000 samples in arid areas within the state of Chihuahua, which were mostly collected and analyzed by the Servicio Geologico Mexicano (SGM). A robust data analysis developed by Tuckey (Box-plot diagram) was applied and as a result, limits between background, anomalous, and outlier concentrations for each of Fe, Mn, and Ba were determined. Once the anomalous concentrations were superimposed on a map containing layers of hydrology, geology, mining, and urban areas, their possible source was linked to either mining, naturally enriched outcrop, or an urban waste discharge. Associations between elements and between element and rock outcrops were also investigated.

Cordilleran Section - 108th Annual Meeting (29–31 March 2012)
General Information for this Meeting


Session No. 4
Environmental Geochemistry I
Hotel Misión Juriquilla: Goyesco 1
08:30-12:55, Thursday, 29 March 2012

Geological Society of America Abstracts with Programs, Vol. 44, No. 3, p. 7

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