首次对藏东南原称的瓦浦组进行系统的岩石化学研究 ,发现它包括了两套不同时代和大地构造环境下形成的火山岩。瓦浦组火山熔岩由下部的玄武岩夹玄武安山岩和上部的流纹岩组成 ,是古特提斯洋盆中的洋岛火山岩 ,其时代初定为早二叠世—晚二叠世早期。在觉马—巴格和扎西所见的岩层是以钙质浊积岩为主的火山 -沉积岩系 ,火山岩为岛弧拉斑玄武岩 ,属晚三叠世早期活动大陆边缘产物。上述发现为碧土带是复杂的造山带拼贴体、古特提斯主洋盆是开阔的多岛洋和晚三叠世活动大陆边缘可能属马里亚纳型提供了重要证据 For the first time, a systematical petrochemistry study was conducted on the Wupu Formation, formerly known as southeastern Tibet, and it was discovered that it consisted of two volcanic rocks formed in different epochs and tectonic settings. The volcanic lava of the Vapu group consists of basaltic basaltic andesite and basaltic rhyolite in the lower part. It was the Yangdao volcanic rock in the Palaeo-Tethys Ocean basin. Its age was initially defined as Early Permian-Early Permian. The rocks found in Jueba-Bagh and Tashi are volcanic-sedimentary rock dominated by calcareous turbidite, which is an island arc tholeiitic basaltic rock and belongs to the active Late Triassic continental margin. The above finding is a complicated orogenic belt collage body of the Bixi belt. The main paleo-Tethys ocean basin is open and multi-oceanic and the Late Maruo Triassic continental margin may provide important evidence of Mariana