Based on newly acquired deformational data of Fenghuoshan group,we have estimat ed the N-S crustal shortening of Fenghuoshan area in central Qinghai-Xizang plat eau .

• 利用新的资料对青藏高原中部风火山地区下第三系风火山群的变形进行了地壳南北向缩短率估算，其值为＞41%25。