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Daniel S. Barker
Igneous Petrology
Ph. D.,
Princeton University, 1961
After retiring in August, 1999, I have begun a few new projects and picked up my efforts on old ones.
Research
1) mapping and volcanological studies of the Chisos Formation, Big Bend National Park, and mechanisms of dike emplacement
2) a history of ideas concerning the magmatic origins of carbonatites, or how one hypothesis changed from heresy to orthodox dogma within a decade (with J. Gittins)
Continuing projects are, in probable order of completion,
1) Identifying magma sources in the Trans-Pecos Cenozoic igneous province (see the database linked to this page; click on Research Home Page below)
2) Mid-Proterozoic granites of the Llano Uplift, central Texas; this is a study with colleagues involving whole-rock major- and trace-element analyses, microprobe mineral analyses, U-Pb geochronology, and Sr, Nd, and Pb isotopy
3) mechanisms of rapid cementation of carbonatite tephra; why are these tuffs such excellent preservers of fossils? (with R. L. Hay)
4) open-system magmatic processes at Hamblin-Cleopatra volcano, Nevada, a Miocene stratovolcano that grew astride an active strike-slip fault (with K. G. Thompson and E. I. Smith)
5) ultracataclasites in a Miocene laccolith in SW Utah; products of flank failure? (with P. D. Rowley)
6) aenigmatite compositions varying in response to silica saturation and total phase assemblages