Aluminum's detection limit is exceeded in most naturally-occurring materials, so analyses of the element may normally be subjected to parametric statistical analysis.
None known
2. As an Aid to Geological MappingAlthough most naturally-occurring aluminum resides in feldspars and their weathering and alteration products, the element tends to correlate with elements such as Fe, Cr and V in weathered material subjected to partial digestion, and is thus an indicator of the presence of mafic rocks.