The major environment geological problems arised from different types of mineral development and its key causes in the Northwest China

The mineral resources development in the Northwest China has greatly promoted the development of the district economy,but the mine ecological environment problems that the unrea sonable development leads are stern,and the part of mining a reas appears to worsent rend.It is different for the major ecology environment problems a rised from different types of mineral resources developing,or the same type of that which is in different regional,different development modes used and developed by differenten terprises.At last,the paper gives some causes to lead problems,for example,historical,community egoism,economical and technological factors,and so on.