Bravo Lake formation geochemical compilation
Introduction
This geochemical compilation contains 237 unpublished whole-rock geochemical analyses provided by S. Modeland (pers. comm., 2005) of mafic volcanic rocks and associated mafic intrusions from the Bravo Lake formation of the Piling group of central
Baffin Island, Nunavut (Modeland and Francis, 2004).. All of the major and trace element analyses were obtained by XRF at the McGill Geochemical Laboratories, with the trace elements re-analysed in 2005. The REE's were analysed by ICP-MS in 2001 at the University of Victoria’s geochemical laboratory for samples with identification codes prefixed by SM and in 2002 and 2003, respectively, at the University of Saskatchewan’s geochemical laboratory for the samples prefixed by the identification code FC, BF, SJ and NL and those prefixed by AD or PI.. Details of geochemical methodologies, detection limits and standard analytical errors for all of the methods applied are readily available from the constituent laboratories. Additional geochemical analyses of the westernmost Bravo Lake formation on central Baffin Island are published by Johns et al.
(2006).
Keywords: volcanic geochemistry, Bravo Lakes formation, Baffin Island
Database structure
To assist the user in interpreting the information provided in the compilation, a description of the fields and general principles followed in preparing the database table
“Bravo Lake Geochem.dbf” is provided below.
[SAMPLE] - Sample number as given in the original data source
[loc_X] UTM easting coordinate, NAD 83
[loc_Y] UTM northing coordinate, NAD 83
[LITHOLOGY] Rock lithology as given in the original data source.
[SiO2] to [Lu]
– whole-rock elemental analyses in wt% for the major oxides, and ppm for traces and REE. Unanalysed elements or where the results were below detection limit are recorded as 0.
[UTM_ZONE] - UTM zone, NAD 83 (final column of the data table).

Reference
Modeland, S., and Francis, D., 2004, Implications of High Field Strength Element
Anomalies in Palaeoproterozoic Mafic Alkaline Magmas of Central Baffin Island, Eos
Transactions AGU, 85 (17), Joint Assembly Supplement, Abstract V14A-03.
Johns, S.M., Helmstaedt, H.H., and Kyser, T.K., 2006. Paleoproterozoic submarine intrabasinal rifting, Baffin Island, Nunavut, Canada: volcanic structure and geochemistry of the Bravo Lake Formation. Canadian Journal of Earth Sciences, v. 43, 593-616.