Geochemical maps, types

Sample Type and Collection The RGNR project in Yunan, Guizhou Sichuan and Guangxi provinces were commenced in 1980, and finished in 1995. For the Southwest China regional geochemical mapping program, about 100... 

For each sampled site, radioactivity was measured by a portable scintillometer (Lima et al., 2005). The data set was used to produce various types of geochemical maps, including dot maps, baseline maps, factor analysis association maps, risk, partial and total radioactivity maps. 

Earth scientists involved in the search of metal ore deposits and a few others, interested in geochemical mapping in general, had known for years, that rock compositions of a given area strongly influence the chemical composition of the soils, plants and waters of this area (Rose et al., 1979 Govet, 1983 later volumes). In cases where a rock type, rich in particular elements, dominates a whole catchment area of a river system, local or regional natural contaminations are common and could be mistaken for industrial pollution. 

Geochemical provinces related to Carlin-type metallogenic provinces can be delineated by the 1 1,000,000 map at a density of one datum per 100 km. ... 

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