ABSTRACT
Conventional geochemical methods are not suitable for or ineffective in geochemical mapping for concealed deposits hidden bellow the thick cover of transported overburden or thick sequence of post-ore sedimentary or vocanic rocks.
Recently, leaching of mobile forms of metals in overburden (MOMEO) has been developed and widely tested in geochemical mapping by using wide-spaced sampling in diverse concealed terrains. The case histories of pilot study show that large-scale geochemical patterns consistent with or favorable for large metallogenic belts can be delineated using wide-spaced MOMEO geochemical mapping in concealed terrains in different settings. The sequence of cover does not mask the mineralization indications. The methods have potential in strategic exploration for giant ore deposits in concealed terrains in the future.
