Abstract by Alan Ketring
Titanite in Pebble Dikes in the East Traverse Mountains, central Utah, and its Implications for the formation of Mo-W deposits
Titanite (Tnt) from pebble dikes found in the East Traverse Mountains of central Utah can help to understand the crystallization history of the White Pine (WP) and Red Pine (RP) porphyries. The pebble dikes formed from hot water that originated either magmatically or from circulating meteoric water (or from both). Dikes were injected into the WP, RP, Little Cottonwood stock (LCS), and the surrounding strata. Electron microprobe and laser ablation analyses of Tnt in thin sections of granitic clasts in pebble dike samples provide a better understanding of the chemical composition of hosted Ttn. This information can bring to light much unknown information about the Ttn grains located at the top of the RP that have been destroyed due to weathering and hydrothermal alteration. This new data will allow us to compare the molybdenum content of the Ttn grains located at the top and bottom of the RP intrusion with WP and LCS Ttn, and better understand the initial magmatic metal concentrations of these intrusions, which has implications for mineralization models.