Abstract:Large trihydroxy bauxite deposit was once considered unavailable in China. With the prospecting thinking of diwa theory, the author has drawn a contrary conclusion. From the view of the law of progression with transformation between mobile and stable regions and the metallogenic specialization of tectonic elements, he reveals the principal reason why the known bauxite deposits in China are mostly of monohydroxide type, and acquires the way of searching for trihydroxide bauxite deposits. He considers that the residual- mobility period of the diwa stage in the crustal development in South China pocesses· tectonic conditions favourable to the formation of bauxite deposits of this type. He believes that the Cenozoic structural sublayer of the residual- mobility period of the diwa stage developed on the carbonate rock of the Paleozoic platformal structural layer is the preferrential target of prospecting. With this thinking and many years of efforts, we have gained preliminary achievements and have discovered Guigang-type latee-ritic trihydroxied bauxite deposits in Guangxi. In future, by extension and analogy of the thinking, we are likely to find large, high-grade bauxite deposits in its vicinity and to discover weathering-type bauxite deposits with other parent rocks.

Key words: trihydroxide bauxite deposit,  law of progression,  mobile and stable regions,          progressive ore Formation,  prospecting thinking,  diwa theory