About the CD-ROM
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Publication Information
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Gelogical Survey of Canada Open File # 5664

Release of Lead Isotope Data in 4 Databases: Canadian, Western Superior, Foreign, and Whole Rocks and Feldspar
Ralph I. Thorpe

© Her Majesty the Queen in Right of Canada 2008

NOTE: Open files are products that have not gone through the GSC formal publication process.


Windows® 95/98/2000 is required to access the data on this CD-ROM. ArcMap™9.1, ArcView™3.1 or higher or MapInfo™6.0 or higher can be used to view and create custom maps with the geospatial data sets.  Ms-Access™2000 or higher is necessary for the Access database.

The data includes ESRI shape files of GIS features for use in ArcView™3.1 or greater. 

The geology of the world was extracted from the Generalized Geology of the World: Bedrock Domains and Major Faults in GIS Format, Scale 1:35,000,000 by L. B. Chorlton, 2007 (Geological Survey of Canada, Open File 5529).

Directories:
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\data
	\mdb
	- Attribute database in MS-Access™2000 for lead isotope sample data

	\shp
	- GIS data in ESRI shape format for ArcView™3.1 and up in Geographic projection with a central meridian at 0 degrees.

	\xls
	-spreadsheets of 4 data sets, containing location data and analytical results. 

		\TunneysPastureSampleLists
		- lists of archived samples at the Tunney's Pasture location of the GSC, with their location in the archives.

\doc
	- Thorpe_PB_isotopes_08.doc: documentation describing the content of the four databases. Data sources are listed in the 		document.
	
\figures
	- plots of the geology of the world with locations for the Pb isotope samples, in .jpg and .cdr format