Skip to Main Content
Book Chapter

Geophysical constraints on Rio Grande rift structure and stratigraphy from magnetotelluric models and borehole resistivity logs, northern New Mexico

By
Brian D. Rodriguez
Brian D. Rodriguez
U.S. Geological Survey, Box 25046, Denver Federal Center, Mail Stop 964, Denver, Colorado 80225-0046, USA
Search for other works by this author on:
David A. Sawyer
David A. Sawyer
U.S. Geological Survey, Box 25046, Denver Federal Center, Mail Stop 964, Denver, Colorado 80225-0046, USA
Search for other works by this author on:
Published:
April 01, 2013

Two- and three-dimensional electrical resistivity models derived from the magnetotelluric method were interpreted to provide more accurate hydrogeologic parameters for the Albuquerque and Española Basins. Analysis and interpretation of the resistivity models are aided by regional borehole resistivity data. Examination of the magnetotelluric response of hypothetical stratigraphic cases using resistivity characterizations from the borehole data elucidates two scenarios where the magnetotelluric method provides the strongest constraints. In the first scenario, the magnetotelluric method constrains the thickness of extensive volcanic cover, the underlying thickness of coarser-grained facies of buried Santa Fe Group sediments, and the depth to Precambrian basement or overlying Pennsylvanian limestones. In the second scenario, in the absence of volcanic cover, the magnetotelluric method constrains the thickness of coarser-grained facies of buried Santa Fe Group sediments and the depth to Precambrian basement or overlying Pennsylvanian limestones. Magnetotelluric surveys provide additional constraints on the relative positions of basement rocks and the thicknesses of Paleozoic, Mesozoic, and Tertiary sedimentary rocks in the region of the Albuquerque and Española Basins. The northern extent of a basement high beneath the Cerros del Rio volcanic field is delineated. Our results also reveal that the largest offset of the Hubbell Spring fault zone is located 5 km west of the exposed scarp. By correlating our resistivity models with surface geology and the deeper stratigraphic horizons using deep well log data, we are able to identify which of the resistivity variations in the upper 2 km belong to the upper Santa Fe Group sediments

You do not currently have access to this article.

Figures & Tables

Contents

GSA Special Papers

New Perspectives on Rio Grande Rift Basins: From Tectonics to Groundwater

Mark R. Hudson
Mark R. Hudson
U.S. Geological Survey, Box 25046, Federal Center, MS 980, Denver, Colorado 80225-0046 USA
Search for other works by this author on:
V.J.S. (Tien) Grauch
V.J.S. (Tien) Grauch
U.S. Geological Survey, Box 25046, Federal Center, MS 964, Denver, Colorado 80225-0046 USA
Search for other works by this author on:
Geological Society of America
Volume
494
ISBN print:
9780813724942
Publication date:
April 01, 2013

References

Related

Citing Books via

Related Articles
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal