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Aeromagnetic and aeroradiometric data acquired over parts of the Trans-Pecos region of West Texas and Southern New Mexico

September 16, 2021

The Trans-Pecos region of West Texas and Southern New Mexico contains a series of rare earth element (REE) enriched ~ 34-36 Ma intrusive rhyolites and syenites. One such intrusive in the Sierra Blanca Mountains, Texas, hosts the Round Top REE deposit which is one of the few REE deposits in the U.S. with an economic evaluation and is scheduled to go into production in 2025. In addition, Alkaline igneous rocks in the Cornudas and Hueco Mountains, both within the Trans-Pecos area, also show high concentration of REEs and other critical elements. In early 2021 an aeromagnetic and aeroradiometric survey was flown over the Trans-Pecos region with the following objectives: 1) Detect regional trends, fractures, or patterns that may be responsible for the locations of Tertiary alkaline intrusions; 2) Identify magma sources and plumbing systems for Tertiary alkaline intrusions; and 3) Identify potential concealed Tertiary alkaline intrusions. The survey was flown with a flight-line spacing of 200 m and survey flights were draped over topography at an average of approximately 125 m altitude. This data release contains the aeromagnetic and aeroradiometric data acquired by the survey and gridded images of parts of that data. See the Sander Geophysics Ltd. Technical Report (Trans-Pecos Survey Technical Report.pdf) for detailed information about the survey. See the "ReadMe.txt" files for descriptions of the files included within each folder.

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