Richard J. Phillips

Richard J. Phillips


510-644-9200

Personal Website

 

My current research is focused on the use of U-series geochronology to constrain the temporal evolution of Quaternary landforms in arid to semi-arid regions. When surfaces such as an alluvial fan, river terrace or moraine form, a soil profile rapidly develops (pedogenesis) and is often accompanied by the growth of pedogenic carbonate. Since the carbonate contains both U and ingrown Th the age and growth rate of the surface may be determined. A knowledge of the surface age and its evolution has particular importance for studies in paleoseismology, geomorphology and climate change. An outline of some of the collaborative projects that I'm currently involved in are given below. For more information please email me.
I am also interested in the initiation age and structural evolution of fault systems, particularly those that bound Tibet. Please see my website for more information.

Current projects:

NEOTECTONICS with Ron Bruhn & Warren Sharp

Understanding the timing of deformation is an important component of evaluating fault activity and the probability and severity of future earthquakes. Along the Wasatch Range, U-series dating of offset Quaternary alluvial fans allows the determination of long-term slip rates since the Pleistocene.

GLACIATION with Brad Singer & Warren Sharp

Quaternary glacial deposits are often used to provide temporal constraints on tectonic events, climate variability or geomorphologic studies. U-series dating of moraines in Patagonia suggests that the technique may resolve the timing of glacial cycles with greater accuracy when compared to other methods.

GEOMORPHOLOGY with Joel Pederson & Warren Sharp

U-series dating of river terraces in the Grand Canyon allows the determination of both the rate of river incision and cliff retreat. The U-Th series is also being used to determine the rate of soil profile development within the Lake Bonneville shoreline.

 

Selected Publications

Peer-Reviewed Articled (published or in review)

Searle, M.P., Phillips, R.J., (2004). Discussion: Large scale geometry, offset and kinematic evolution of the Karakoram fault, Tibet, by Lacassin et al. [EPSL 219 (2004) 255-269]. Earth Planet Sci. Lett., 229 1-2, 155-158.

Phillips, R.J., Parrish, R.R., Searle, M.P., (2004). Age constraints on ductile deformation and long-term slip rates along the Karakoram fault zone, Ladakh. Earth Planet. Sci. Lett., 226 3–4, 305-319.

 

Conference Abstracts & Presentations

Phillips, R.J., Searle, M.P., (2006). Macro- and micro-structural architecture of the Karakoram Fault, Eastern Karakoram, NW Himalaya: The relationship between magmatism and strike-slip fault initiation. 21st Himalaya-Karakoram-Tibet Workshop. Journal of Asian Earth Sciences, 26, Pergamon.

Phillips, R.J., Searle, M.P., Parrish, R.R., Darbyshire, D.P.F., (2006). Evolution of the South Asian Margin, Eastern Karakoram. 21st Himalaya-Karakoram-Tibet Workshop. Journal of Asian Earth Sciences, 26, Pergamon.

Phillips, R.J., Searle, M.P., (2005). Architecture of the Pangong Transpressional Zone, Ladakh, NW India: Structural and Temporal Constraints on the Evolution of the Karakoram Fault. Tectonics of Strike-Slip Restraining & Releasing Bends in Continental & Oceanic Settings, Geol. Soc. London.

M.P. Searle, Phillips, R.J., (2005). Transpressional uplift of middle and deep crustal rocks by constraining bends along the Karakoram Fault in the K2 - Gasherbrum range. Tectonics of Strike-Slip Restraining & Releasing Bends in Continental & Oceanic Settings, Geol. Soc. Lond.

Phillips, R.J., Sharp, W.D., Pederson, J.L., Boettinger, J.L., (2005). Uranium Series Dating of Pedogenic Carbonate from the Provo Shoreline, Lake Bonneville, Utah, USA. GSA Annual Meeting, Utah.

Phillips, R.J., Parrish, R.R., Searle, M.P., (2003). Geochronological, Geochemical and Structural Constraints on the Initiation and Evolution of the Karakoram Fault, Ladakh, Northwest India. Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract T21D-0478.

Searle, M.P., Phillips, R.J., (2003). A Reality Check on the Timing of Initiation, Geological Offsets, Slip Rates and Geodetic Rates on the Karakoram Strike-Slip Fault. Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract T22C-02 Invited.

Phillips, R.J., Parrish, R.R., Searle, M.P., (2003). TIMS U-Pb age Constraints on the Initiation and Evolution of the Karakoram Fault, Ladakh, NW India. 18th Himalaya-Karakoram-Tibet Workshop.

Phillips, R.J., Parrish, R.R., Searle, M.P., (2003). Macro- and Micro-Structural Evolution of the Karakoram Fault, Ladakh, NW India. 18th Himalaya-Karakoram-Tibet Workshop.

Phillips, R.J., Parrish, R.R., Searle, M.P., (2002). Structural and U-Pb Constraints on the Initiation and Evolution of the Karakoram Fault. Tectonic Studies Group Ann. Meet., University of Leicester.

Phillips, R.J., Parrish, R.R., Searle, M.P., (2001). Structural evolution of the Karakoram Fault. Proceedings of the 16th Himalaya-Karakoram-Tibet workshop. Journal of Asian Earth Sciences, 19 (3A), Pergamon.