20260119
12551800
1.0
ISO 19139 Metadata Implementation Specification GML3.2
FALSE
NB_ThK_ratio_200m.ers
2399100.000000
2657300.000000
7328100.000000
7674900.000000
1
002
Projected
GCS_North_American_1983_CSRS
Linear Unit: Meter (1.000000)
NAD_1983_CSRS_New_Brunswick_Stereographic
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS["NAD_1983_CSRS_New_Brunswick_Stereographic",GEOGCS["GCS_North_American_1983_CSRS",DATUM["D_North_American_1983_CSRS",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Double_Stereographic"],PARAMETER["False_Easting",2500000.0],PARAMETER["False_Northing",7500000.0],PARAMETER["Central_Meridian",-66.5],PARAMETER["Scale_Factor",0.999912],PARAMETER["Latitude_Of_Origin",46.5],UNIT["Meter",1.0],AUTHORITY["EPSG",2953]]</WKT><XOrigin>-28216700</XOrigin><YOrigin>-23260100</YOrigin><XYScale>146555990.15834904</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>2036</WKID><LatestWKID>2953</LatestWKID></ProjectedCoordinateSystem>
32
FALSE
None
1
ER Mapper
TRUE
continuous
floating point
-999999
20260119
14550400
20260120
9515800
150000000
5000
ISO19115_3
<DIV STYLE="text-align:Left;"><P STYLE="font-size:16ptmargin:0 0 0 0;"><SPAN><SPAN>A 200 m grid of airborne radiometric thorium-to-potassium (Th/K) ratios for New Brunswick.</SPAN></SPAN></P><DIV><DIV><P><SPAN STYLE="font-size:16pt"><SPAN>This dataset represents the spatial distribution of thorium-to-potassium (Th/K) ratios across New Brunswick at 200 m resolution, derived from a compilation of NRCan airborne radiometric surveys flown at 1000 m line spacing. The Th/K ratio highlights areas where thorium and potassium abundances differ, providing insights into lithological variations and alteration patterns. The dataset is provided in NB Stereographic double (NAD83) for consistent province-wide coverage.</SPAN></SPAN></P><P STYLE="font-size:16ptmargin:0 0 0 0;"><SPAN>The Th/K ratio grid was produced by dividing the compiled thorium (Th) raster by the compiled potassium (K) raster at each 200 m cell. Individual NRCan radiometric surveys were microlevled and interpolated to produce a seamless 200 m grid. The final raster was delivered as a .ers file in NB Stereographic double (NAD83).</SPAN></P><P><SPAN>The dataset is not updated regularly. Updates occur only if new reprocessing, corrections, or additional surveys become available. As of now, the compilation represents the most recent processing as of December 2025.</SPAN></P></DIV></DIV></DIV>
Amirabbas Karbalaeiramezanali
GSB
amirabbas.karbalaeiramezanali@gnb.ca
Serge Allard
GSB
Serge.Allard@gnb.ca
Serge Alard
Serge Allard
Serge Allard
Hernan Ugalde
hernan.ugalde@dipgeosciences.com
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Sensitivity: Public/Unclassified</SPAN></P><P><SPAN>Retention: 5 Years</SPAN></P></DIV></DIV></DIV>
NB Dept of Natural Resources, GSB Section
Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362
NB_ThK_ratio_200m
1
-67.853704
-64.389985
48.073215
44.935720
A 200 m grid of airborne radiometric thorium-to-potassium (Th/K) ratios for New Brunswick.
1291
200.000000
1734
200.000000
2
1
0
2399100.000000 7328100.000000
2399100.000000 7674900.000000
2657300.000000 7674900.000000
2657300.000000 7328100.000000
2528200.000000 7501500.000000
Band_1
18.188690
-5.076430
32
Raster Dataset
dataset
EPSG
6.2(9.3.0.0)
20260120