拉萨地块和羌塘地块多个二叠纪基性岩及一个古特提斯海山的初步古地磁结果:对模拟东冈瓦纳晚古生代裂解的暗示

Detachmentofthesliver-likeCimmerianterranefromeasternGondwanaintheEarlyPermiantriggeredmaficvolcanisminmanypartsoftheriftzone.Tounderstandthistectonicepisodewehavecarriedoutpaleomagneticinvestigationsonmaficvolcanicfor-mationsthatwereeruptedonkeyterranesthatnowformpartofTibet.Specifically,wewillpresentdatafromsectionsnearLhasaCity(centralLhasablock)andTuotuohe(centralQiangtangBlock)aswellasnearGyanyima(Paleotethyansea-mount)thatwasemplacedontothefloorofPalaeotethysduringtheLatePermian.Paleomagneticplotsfromeachlocationwillbeusedfortectoniccalculations.Ournewdatawillbeusedtoevaluateregionalscalemodelscon-cernedwithhowtheCimmerianterranesinsouthernandSEAsia(fromIran-Tibet-SWChina-Myanmar-Thailand-Sumatra)formerlyabuttedeasternGond-wana.