GEOCHEMICAL ANOMALY AND METALLOGENIC POTENTIAL OF THE NAOMUGENGSUMU LITHIUM MINERALIZATION AREA IN INNER MONGOLIA

Based on 1:10 000 densified soil survey for 1:200 000 regional geochemical exploration, three NW-trending Li anomalous zones are delineated within the AS59 geochemical anomaly area. They are further divided into seven subanomalies, which are relatively strong, with peak value up to 1651.1×10^-6, in large sizes and with obvious Li concentration centers, showing the inner-middle-outside zonation. The Li contents in surface and deep layer samples are uniform. There is also a consistence of Li contents in samples collected with different methods. The Li anomaly is caused by three rare metal mineralized alteration belts that are developed in the Late Jurassic albitized rhyolitic porphyry. The channel sampling analysis shows the Li contents of 0.08×10^-2-0.136×10^-2. With integration of deep geochemical study and geological background, the lithium prospecting in this area should contribute to a significant breakthrough.