Control of Tectonic on Sedimentation in A’nan Depression, Erlian Basin

A’nan depression is faulted lake basin and control of its tectonic activity on the type characteristic of sedimentary facies, the sediment conduit and the capacity distribution of sandbodies can be summarized mainly as follows: (1) the area of sediment accumulate is in the thrown side of growth fault, with the high accommodation, meanwhile, the changes of sedimentary facies are caused by the differences of accommodation in the two sides of fault in the condition of stable source supply; (2) the accommodation zones between faults have low area, which can be a conduit from source area to depression area; (3) the distribution of sedimentary facies is controlled by ancient uplift that can block or change the direction of sediment transport. In other ways, the ancient uplift is as secondary sources during lower stand.