青藏高原中部风火山地区第三纪地壳南北缩短量研究

摘要

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%。缩短时期主要为渐新世末，其次为中新世末。%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 .The shortening is greater than 41%, the majority of which occurred in late Oligo cene and the minority in late Miocene.