Year of Publication
Master of Science (MS)
Arts and Sciences
Earth and Environmental Sciences (Geology)
Dr. J. Ryan Thigpen
A new apatite (U-Th)/He (AHe) dataset from subvertical transects collected in the Teton and Gallatin Ranges in the Teton-Yellowstone region provides insight for the slip history and length of the Teton fault. Along the northernmost segment of the Teton fault, inverse thermal history modeling of AHe data from Eagles Rest Peak yield a ~9 Ma age for onset of fault slip. This age supports previous interpretations that Mount Moran may be the true center of the Teton fault. This refined interpretation coupled with lengthdisplacement fault scaling analysis and previous estimates of total fault displacement (~6 km) indicates that the Teton fault may extend 50-90 km north of Mount Moran. However, this new data precludes the possibility that the Teton and East Gallatin faults represent the same structure. Yet, because these systems share a similar structure trend and initial slip ages (13 Ma and 16 Ma, respectively), they may still be related at a larger scale. To the south, the Teewinot transect yields the oldest onset age of ~32 Ma, however a >500 m vertical data gap in this transect leads us to cautiously interpret the results of this model, particularly as this age conflicts with four other transects along-strike.
Digital Object Identifier (DOI)
- Geological Society of America Graduate Student Research Grant
- University of Kentucky, Dept. of Earth and Environmental Sciences Brown McFarland and Ferm Research Funds
- University of Kentucky, Dept. of Earth and Environmental Sciences Pirtle Scholarship
Hoar, Rachel Montague, "REFINING THE ONSET TIMING AND SLIP HISTORY ALONG THE NORTHERN PART OF THE TETON FAULT" (2019). Theses and Dissertations--Earth and Environmental Sciences. 62.