@mastersthesis {43575,
	title = {The origin and timing of late-stage carbonate cements in Devonian carbonates of the deep Alberta basin: Based on fluid inclusion and isotopic evidence},
	volume = {Earth \& Planetary Science},
	year = {2001},
	pages = {121 pages },
	school = {McGill University},
	address = {Montreal, QC },
	abstract = {Deep basin Leduc Obed and Swan Hills Simonette calcite fluid inclusions yielded Th ranges of 127 to 172{\textdegree}C and 122 to 158{\textdegree}C; while saddle dolomites have Th from 136 to 148{\textdegree}C and 133 to 162{\textdegree}C, respectively. Calcite data from the subsurface suggest a 20{\textdegree}C/km geothermal gradient and saddle dolomite data a gradient around 23{\textdegree}C. Vug-filling calcites from Spray Lakes, Parker{\textquoteright}s Ridge and Big Hill, yielded T h data (128.0 to 155.1{\textdegree}C) similar to vug-filling cements from Obed and Simonette. Fluids in the fracture-filling saddle dolomites analysed have an average T h of 171.6{\textdegree}C and salinity of 17.1. Post-thrusting fractures yielded calcites with the lowest Th and salinity suggesting precipitation from cooler, largely meteoric waters. Homogenization temperature data for vug and fracture-filling from subsurface and outcrops suggest that late calcite and dolomite phases were precipitated near maximum burial, in the Paleocene.

Many of the Obed and Simonette late-stage calcites and dolomites have very high 87 Sr/86 Sr signatures (up to 0.7370). Obed late calcites show a strong east to west increasing trend in Sr isotopes across the buildup--suggesting fault control of this margin. (Abstract shortened by UMI.)},
	keywords = {calcite phases, dolomite phases, saddle dolomites},
	url = {http://search.proquest.com/docview/304766637},
	author = {Smith, Sean Graham Whitney}
}
