Tracking the sources of metals to the San Juan River, Four Corners Region, USA: An introduction to the thematic issue

Geochemistry: Exploration, Environment, Analysis
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Abstract

Surface water quantity and quality is important for arid and semi-arid regions where many people, including underserved and Indigenous communities, rely on a scarce resource for drinking water, irrigation, livestock and ceremonial uses. The southwestern United States, and specifically the Four Corners Region (Colorado, Arizona, New Mexico and Utah), is an example of this situation. Elevated concentrations of metals including aluminium, arsenic and lead were identified in previous studies and this study in the San Juan River from below the Navajo Dam, through the Navajo Nation to Mexican Hat, Utah. An interdisciplinary team applied approaches and principles of geology, geochemistry, geomorphology, hydrology and statistics to gain a better understanding of the tributaries supplying the source(s) of metals to the San Juan River. This introductory paper provides an overview of the ‘Metal geochemical fingerprinting to identify sub-watershed source contributions to surface water at a regional arid watershed scale, Four Corners Region, USA’ thematic collection. An overview of sampling sites, techniques and potential sources of metals is provided. Approaches used in this study could be applied to investigations in similar systems globally.

Suggested Citation

Blake, J., Austin, S.A., Johnson, F., Brown, J., Chavarria, S., Mixon, R., Van Zante, C., Wilkins, K., Whiting, M.R., Ferguson, C.L., Shephard, Z., Bosch, K., Austring, T.J., Ratigan, Z., Shomour, A.A., and Yager, D., 2025, Tracking the sources of metals to the San Juan River, Four Corners Region, USA: An introduction to the thematic issue: Geochemistry: Exploration, Environment, Analysis, v. 25, no. 4, geochem2024-027, 16 p., https://doi.org/10.1144/geochem2024-027.

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Publication type Article
Publication Subtype Journal Article
Title Tracking the sources of metals to the San Juan River, Four Corners Region, USA: An introduction to the thematic issue
Series title Geochemistry: Exploration, Environment, Analysis
DOI 10.1144/geochem2024-027
Volume 25
Issue 4
Publication Date December 05, 2025
Year Published 2025
Language English
Publisher Geological Society of London
Contributing office(s) New Mexico Water Science Center
Description geochem2024-027, 16 p.
State Arizona, Colorado, New Mexico, Utah
Other Geospatial Four Corners region
Additional publication details