Internal Geology and Evolution of the Redondo Dome, Valles Caldera, New Mexico

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Journal Article: Internal Geology and Evolution of the Redondo Dome, Valles Caldera, New Mexico

Abstract
A detailed inventory was made of subsurface samples taken from deep geothermal test wells drilled in the resurgent Redondo dome in the Valles caldera of New Mexico. Attention was focused on the relationships between the Bandelier Tuff and accompanying felsic tuffs and sediments. Welded and nonwelded ash flow tuff rocks deposited on the surface of the Pliocene Palizer Canyon Formation were taken as representing small erruptions correllated with the 3.1-3.6 Myr-old tuffs. Upper parts of the tuffs were eroded away and replaced by tuffaceous sandstone. The Tshirege portion of the Bandolier Tuff, containing a thick interior zone of granophyric crystallization, was deposited just before the beginning of the uplift of the Redondo dome. A comparison of the uplift with a model for formation of the laccoliths of the Henry Mountains indicated the magma was 4700 m thick, in line with the fact that the 3243 m bore hole did not reach the pluton responsible for the doming.

Authors 
D. L. Nielson and J. B. Hulen








Published Journal 
Journal of Geophysical Research, 1984





DOI 
10.1029/JB089iB10p08695

Online 
Internet link for Internal Geology and Evolution of the Redondo Dome, Valles Caldera, New Mexico

Citation

D. L. Nielson,J. B. Hulen. 1984. Internal Geology and Evolution of the Redondo Dome, Valles Caldera, New Mexico. Journal of Geophysical Research. 89:8695-8711.