The P-T-t history of a Barrovian sequence in Dutchess County, New York, and the adjacent part of Connecticut
by Chen, Yan, M.S., UNIVERSITY OF MARYLAND, COLLEGE PARK, 2009, 122 pages; 1467654

Abstract:

The P-T-t history of a Barrovian sequence in Dutchess County, New York and the adjacent part of Connecticut was studied. Using the average P-T mode in THERMOCALC, the following P-T results were calculated for the garnet, staurolite, kyanite and sillimanite-K-feldspar zones (1σ uncertainties): 5.2±0.8 kbar, 570±12°C; 5.9±1.1 kbar, 557±12°C; 6.4±1.1 kbar, 600±29°C; and 7.4±1.4 kbar, 752±68°C, respectively. Phase equilibria modeling in the MnNCKFMASHTO system yields peak P-T results consistent with the average P-T results.

Monazite ages were obtained for the garnet, staurolite, kyanite and sillimanite-K-feldspar zones (2σ uncertainties): 455±6 and 453±10 Ma; 451±9 and 438±8 Ma; 478±6, 431±4 and 425±8 Ma; 533±7 Ma, 507±6, 506±4 Ma and 472±5 Ma, respectively. These ages help to constrain the timing of the Taconic and Salinic orogenic events.
 
AdvisersMichael Brown; Philip Piccoli
SchoolUNIVERSITY OF MARYLAND, COLLEGE PARK
SourceMAI/ 47-06, p. , Aug 2009
Source TypeThesis
SubjectsGeology
Publication Number1467654
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