Constraints of ductile shear deformation on rock geochemical behavior-an example from the Bashikaogong ductile shear zone in the northern Altyn Tagh;

According to the discussion on the regional geologic setting, basement evolution of Kumishi Basin, and the tectonic evolution of south Tianshan in Mesozoic and Cenozoic era, this paper studies the nature and tectonic evolution history of Kumishi Basin and points out that Kumishi Basin is composed of two protobasins of two different phases which piece together in plane and pile up in profile.

The Gamba basin of southern Tibet, is located in the east of Tethys tectonic region, whereexposes complete strata from late Cretaceous to Paleogene.

The formation of Bashituo field is complex, who has the different formation pressure system including the high pressure, the low pressure salt water level and the oil gas level, often appears complex conditions such as brine leaching, sticking on multiple salt bed, leaking, collapsing, blocking and so on during the process of welldrilling.