The Santa Fe region is rapidly growing. The Santa Fe Group aquifer, east of the
Pajarito Fault, in the Española Basin is the main source of municipal
water for the region, and water shortfalls could have serious consequences.
Future growth and land management in the region depend on accurate assessment
and protection of the region's ground-water resources. An important issue
in managing the ground-water resources is a better understanding of the
hydrogeology of the Santa Fe Group, the sedimentary deposits that fill
the Rio Grande rift and contain the principal ground-water aquifers.
The U.S. Geological Survey (USGS) is doing a series of multidisciplinary studies
of the Española Basin in northern New Mexico. Detailed geologic mapping,
high-resolution airborne magnetic surveys, electromagnetic surveys, and
hydrologic, lithologic, and hydrogeochemical data are being used to better
understand the aquifer systems. A magnetotelluric (MT) survey was done
as part of these studies. The primary purpose of the MT survey was to
map changes in electrical resistivity with depth that are related to
lithologic variations important to the critical aquifers across the Pajarito
Fault. The purpose of this report is to release the MT sounding data;
no interpretation of the data is included.
|Posted October 2005
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