We explored the characters of seismic wave groups of the Carboniferous in the eastern Luliang uplift of Junggar Basin under the guidance of the latest drilling and seismic data.Accordingly

the tectono-stratigraphic sequences were identified in the study area.Four main reflection interfaces

namely T

0

T

1

T

2

and T

3

were identified based on analysis and correlation of synthetic seismograms of 30 wells.Among them

the interface T

0

and T

2

are characterized by high amplitude

good continuity

and stable waveform of reflective waves

thus are the main regional unconformities and the critical key beds of comparison in the area.Based on that

the seismic wave group characters of each seismic stratum among the four interfaces were summarized.We thus knew that the seismic wave groups between T

1

and T

2

have low amplitude

medium-low frequency and moderate-poor continuity

and wedge-shaped reflection

thus can be used as the key beds of comparison in the eastern Luliang uplift.Then we traced the unconformities

analyzed the outcrop

paleontological and chronological data

and subsequently subdivided the Carboniferous herein into four tectonic layers.From the bottom to the top

they are the lower sedimentary tectonic layer C

1

-s(Dishuiquan Formation)

lower volcanic tectonic layer C

1

-v(Songkaersu lower group)

upper sedimentary tectonic layer C

2

-s(Songkaersu upper group) and upper volcanic tectonic layer C

2

-v(Bashan Formation).The results can be summarized as follows:(1)the distribution of tectonic layers in the Carboniferous is controlled by the basement

tectonic setting

location of development and later modification.Their thickness is relatively large in the intra-arc fault depression and fore-arc basin

while is relatively small on the island arc convex;(2) two tectonic compression activities developed at the end of the Early and Late Carboniferous respectively lead to the denudation of the strata between C

1

-v and C

2

-s and that on top of the C

2

-v

and the inversion of the fault depression in the Carboniferous.