GEOCHEMISTRY AND GEOPHYSICS
INTRODUCTION
Geochemistry is the study of the chemistry of rocks, minerals, and mineral deposits. Geochemical prospecting uses chemical tests in the search for mineral deposits by analysing stream or lake sediments, natural waters, soils, rocks, or vegetation for unusual traces of elements (almost always metals) caused by the presence of mineralization. Geophysics is the study of the physical properties of rocks, minerals, and mineral deposits. Geophysical prospecting is the search for mineral deposits by measuring the physical properties of near-surface rocks, and looking for unusual responses caused by the presence of mineralization. Elec-trical, magnetic, electromagnetic, gravitational, seismic,and radioactive properties are the ones most commonly measured.For reasons which follow, only a few geochemical and geophysical methods are suitable for use by a beginning prospector. Nevertheless, it will help you to have some understanding of geochemical and geophysical techniques
because they appear in almost every exploration report. With some ?eld experience and a little basic knowledge you may
be able to take advantage of much free information.
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