Multifractals and Local Singularity Analysis - Geomathematics: Theoretical Foundations, Applications and Future Developments - page 443

Fig. 11.23 Geological setting of tin deposits in Gejiu area and map patterns derived from tin
concentration values in stream sediment samples. (a) Simplified geology after Yu ( 2002 ). Solid
lines indicate faults; triangles represent tin deposits; UTM coordinates apply to map corner points.
(b) Locations examples of estimation of local tin singularity in Fig. 11.24 .(c) Distribution of tin
concentration values in 1,000 stream sediment samples using inverse distance weighted moving
average. Eight of 11 large tin deposits fall on large anomaly in eastern part of area that is due to
environmental pollution related to mining (d) Distribution of local tin singularities. Tin deposits tend
to occur in places where local singularity is less than 2 (Source: Cheng and Agterberg 2009 ,Fig.1)