In the southeast part of the North-Asian craton, several ring basite-ultrabasite plutons have been recognized, with which the commercial placers of platinoids a
According to the chemical and mineral composition characteristics of the fly ash,alumina can be extracted from fly ash through the calcining method by using sod
By means of microscopy and laser Raman spectroscopy,the authors studied the fluid inclusions in petrography.The results show that there exist three-phase CO2 -b
It is still a laborious work to consult massive multidisciplinary geological maps which are scattered in different geological departments,and hard to give full