The Junggar Basin is a large superimposed basin bated on a Pre-Cambrian massif. Since the Cambrian

the plate tectonic evolution of the northeastern Junggar Basin can be divided into 4 periods as follows: 1. The passive continental margin phase (Pz

1

); 2. The transform phase from passive continental margin to continental collision (D

1

-C

1

); 3. The collision foreland basin phase (C

2

-P

1

); 4. The down warping inland phase (P

2

-Q). The evolution of plate tectonics controlled the development of the sedimentary basin. Corresponding to the plate tectonic history

the northeastern Junggar Basin consisted of a miogeolinai prism (C-C

1

)

a collision foreland basin(C

2

-C

1

)

and a down warping basin (P

2

-Q) ect

. They gave abnudant organicmaterial for the formation of petroleum. The evolution of plate tectonics also controlled the geometric shape

the structure

the sedimentation and the thermal evolution of the basin

and so thus controlled the generation

migration aad accumulation of oil and gas.