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Multielement Geochemical Dataset of Surficial Materials for the Northern Great Basin

Grids (interpolation)

Rather than being concerned with individual drainage samples, we wanted to examine large, regional features in the study area. Because of the large number of individual samples and the large variations in background, we decided to grid the data. Each of the elements in the dataset was gridded using the Spatial Analyst extension of ArcView 3.2a. We performed inverse-distance weighting (to the third power) using a radius of 10,000 m.

Data quality issues relating to the grids are discussed elsewhere, but the Mesozoic cratonal margin and the approximate extent of Tertiary volcanic cover are shown to allow viewers to reach their own conclusions regarding correlation among these features and geochemistry.

Figure 5.-Index map of study area.

Thumbnails

Click on a thumbnail to view a larger image. ("Partial" refers to analysis via the ICP-Partial method, and "total" to analysis via the ICP-40 method. See data quality for further discussion of sample analyses.)

Ag, partial	Ag, total	Al	As, partial	As, total
Au	Ba	Be	Bi, partial	Ca
Cd, partial	Cd, total	Ce	Co	Cr
Cu, partial	Cu, total	Fe	Ga	K
La	Li	Mg	Mn	Mo, partial
Mo, total	Na	Nb	Ni	Pb, partial
Pb, total	P	Sb, partial	Sc	Sn
Sr	Th	Ti	V	Y
Zn, partial	Zn, total

High-Quality, Printable Grids

CLICK HERE to access high-quality (300 dpi) versions of the grids.

CLICK HERE to access References.