• B.S., Montana State University, Dept. of Earth Sciences (2000)

The purpose of my Master's work is to examine the relationship between rock type and style of mineralization for alkaline rocks of northeastern Mexico. Areas of study include the El Picacho Complex and San Carlos District in the state of Tamaulipas, the Candela-Monclova area of Coahuila and Nuevo Leon, and the Aguachile District of northern Coahuila. In northeastern Mexico, F ± Be deposits are spatially associated with syenite and phonolite ± alkali rhyolite while Cu ± Au mineralization appears to be spatially correlated with more mafic monzonite and (quartz) diorite.

My thesis work includes petrography, oxygen isotope analysis, electron microprobe analysis, and mapping of intrusion-related hydrothermal systems in order to document spatial and temporal relationships between lithology and associated alteration and mineralization. The intent of this work is to better understand the types of fluids responsible for generating economic deposits of such resources as fluorite, copper, and gold in an alkaline magmatic environment. Ultimately, this information may aid in exploration efforts by acknowledging a genetic relationship and consequent spatial association between certain mineral deposits and characteristic rock types and/or alteration styles.

Selected publications:

Hamblock, J.M. and Feeley, T.C. 2001, Petrography and geochemistry of the Copper Lakes intrusive series, Absaroka Volcanic Province, Wyoming: Geological Society of America Abstracts with Programs, v. 33, no. 5 p. A-8

Feeley, T.C., Cosca, M.A., Hamblock, J.M., Lindsay, C.R., 2001, Petrogenesis of shoshonitic magmas at the Sunlight volcano, Absaroka Volcanic Province, Wyoming: Geological Society of America Abstracts with Programs, v. 33, no.5 p. A-12