Mesozoic-Cenozoic five tectonic events and their petroleum geologic significances in west Tarim Basin

The new achievements about the strata, structure, paleo-magnetism, geochemistry and oil-gas-bearing basins of the west Tarim Basin, west Kunlun Mountains, Middle Asia Tianshan and Pamir orogens suggest that structural features, origins and their petroleum geologic significances of the five fateful events play an important role in the west Tarim Basin since Mesozoic. The five events could be identified as: ① evolution closing of the west segment of the south Tianshan (or Turkestan) ocean in the end of Early Permian and exhumation of the west part of the Tarim Basin in the early Mesozoic; ②Jurassic strike-slipping of the Talas-Ferghana fault and the formation of the Early-Middle Jurassic Kuzigongsu pull-apart basin; ③ Cretaceous-Paleogene regional descension and ingression; ④ the formation of the Pamir arc during Neogene-Quaternary and S-N regional compression; ⑤ Early Cretaceous and Paleogene basaltic volcanisms in the Tuoyun and the Middle Asia Tianshan. All of the five events have important significances for the exploration of the west parts of the Tarim Basin.