^pLaboratory;
oflsotope;
Geochronology;
and;
Geochemistry,;
Guangzhou;
Institute;
of;
Geochemistry,;
Chinese;
Academy;
of;
Sciences,;
Guangzhou;
510640,;
China;
^pInstitute;
of;
Geology;
and;
Mineral;
Resources,;
Chengdu;
610081,;
China;
^pUniversity;
of;
Technology,;
Guilin;
541004,;
China;
长英质岩石; 富钾火山岩; 西藏东部; 构造演化; 始新世; 卟啉; 高镁; 地球化学;