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TitreThe Nunavut indicator mineral compilation and the Canadian database of geochemical surveys: a strategy for harmonized management and dissemination over the internet
AuteurAdcock, S W; Spirito, W A; Chorlton, L B; Paulen, R C; McClenaghan, M B; Kerr, D E
Source37th Annual Yellowknife Geoscience Forum, abstracts of talks and posters; par Jackson, V; Palmer, E; Northwest Territories Geoscience Office, Yellowknife Geoscience Forum Abstracts Volume vol. 2009, 2009 p. 1
LiensOnline - En ligne
Séries alt.Secteur des sciences de la Terre, Contribution externe 20090243
Réunion37th annual Yellowknife Geoscience Forum; Yellowknife; CA; Novembre 17-19, 2009
Documentpublication en série
Sujetséléments d'indice; levés géochimiques; exploration de dépôts glaciaires; minéraux lourds; géologie des dépôts meubles/géomorphologie; géochimie; Cénozoïque; Quaternaire
ProgrammeBases de données couvrant les trois territoires (géologie de surface), GEM : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
As part of the Tri-Territorial Geoscience Integration Project under the Geomapping for Energy and Minerals (GEM) Program, a compilation and re-examination of archived heavy mineral concentrates from published assessment files, reports, and private exploration company holdings has commenced to assist exploration in Nunavut. These data will complement the KIDD-KIMC and till geochemistry data sets provided by INAC and NTGO, and include indicator minerals of all commodities. The information will be captured in the Canadian Database of Geochemical Surveys (CDoGS), which accommodates the comprehensive information required for all varieties of geochemical surveys. This includes the material processing and analytical methods metadata required for publishing geochemical data according to international standards. The CDoGS web portal exposes these surveys in query-able fashion so that those of interest can be identified for further examination. Literature references are connected to each survey, and many are complete with links to full metadata/reference downloads for the main source and related references on Geoscan and on capable Provincial-Territorial reference database sites. GSC-held analytical data is itself made downloadable in three convenient spreadsheet-compatible formats that differ in the treatment of missing values and detection limits. Because there is a high degree of variability in sample collection, processing, and analytical methods between different surveys, particularly among those collected and processed by different organizations, survey results are released as separate, survey-specific files. Whether or not to merge spreadsheets for a given purpose is left up to users, who can base their choices on the metadata provided.
Internet Earth browsers such as Google Earth have quickly become the new, universal visualization tool for geographic data. Analytical data are increasingly being delivered in KML format (an OGC-approved standard) which permits quick visualization of survey areas and sample analyses for each chemical element of interest via an Earth browser. The CDoGS system allows interactive selection of an element of interest using a graphical periodic table tool.
For geochemical data held and distributed by other organizations, links to those distribution sites are also provided through the CDoGS portal. Whether or not this will work efficiently for links to NWT- and Nunavut-based portals will depend on the severity of Internet access obstacles related to relaying via satellite. Potential for duplication or mirroring of data sets with translation from the GSC format to territorial formats will be addressed by GSC IM experts and territorial counterparts.