From the Pagosa Sun (Jim McQuiggin):
That research will involve two projects, one large scale, the other much smaller in scope.
Dr. Terry Young (head of the Geophysics department), Dr. Michael Batzle and Dr. André Revil (both professors of geophysics) described the research their School of Mines team will conduct in Pagosa.
Although faculty and students would be researching numerous characteristics of the aquifer, that research would be the result of the two primary studies: deep seismic profiles made of a portion of the aquifer and passive, “geoelectrical methods” of data collection — “including self-potential, electrical resistivity, and induced polarization” — that Revin describes on his website.
As far as deep seismic profiling, Young said that, “The technique is very similar to medical technology, such as an MRI or a CAT scan.”
What Young meant was that significantly large sound waves are directed beneath the earth’s surface, allowing a computer to translate the received echoes as shapes and depths (much in the way that an MRI — Magnetic Resonance Imaging — provides three dimensional images of a patient).
Those sound waves will be generated through the use of so-called “thumper trucks” — 60,000-pound pieces of equipment that generate controlled seismic energy.
Through both reflection and refraction, seismic surveys of the subterranean topography are achieved as seismic waves, travelling through a medium such as water or layers of rocks, are recorded by receivers, such as geophones or hydrophones.
Revin’s research, on the other hand, measures electrical signals associated with the movement of water in porous, fractured materials to locate the movement and characteristics of geothermal water.
With dozens of graduate students in tow, working with Mines faculty, the team will mobilize in specific areas throughout Pagosa Country, attempting to map portions of the aquifer for the first time ever.