Little or no vein-type W-Sn deposits of Nanling region are not closely rel-ated with Yenshanian period granites in the region.The granites often occurredin complex rock bodies of multistage and metallogenesis may be closely relatedto small rock bodies intruded in latter stage.NE and EW great faults in theregion mainly controls the space distribution of complex rock bodies.The seco-ndary and/or derivative faults controls the emplacement of ore-forming graniteintruded in latter stage and also controls ore-field and deposits emplacement.Mineralizing crevasses of vein-type W-Sn deposits are secondary and/or deriva-tive crevasses arised from the faults controlling ore-field and deposits emplace-ment.Mechanically

the crevasses resulted principally from shear process buttheir charact(?)rs are jointly the features of shear-tension or shearcompression.Evolution of mineralizing crevasses during post-oreforming and oreforming periodis generally inheritable.The inheritance action during ore-forming resulted increvasses multi-openings and filling to form complex vein.