The Strike-slipping Motion Of Tan-Lu Fault And The Growth Characteristics Of Weibei Hollow

The geology field have much explain and no formation consensus to formative reason of break to sink of hollows in Bohai Basin.the Weibei Hollow is an extended break to sink of hollow located in Tan-Lu Fault zone,and it is there have no doubt to its formative reason for the strike-slipping motion of Tan-Lu Fault. Therefore, this topic idea is passing to depict the Weibei Hollow of basin characteristic, the structure growth characteristic, the deposition characteristic,and characteristics of strike-slipping motion of Tan-Lu Fault, investigate the contact of the inner part,study control functions of the strike-slipping motion of Tan-Lu Fault to the the growth characteristics of Weibei Hollow. Theoretically this can provide new proofs for wholely understanding the controlling function and mechanics mechanism of the strike-slipping motion of Tan-Lu Fault to the gowth of the Weibei Hollow,and hollow is go to the whole Bohai Basin, in the fulfillment can guide the study of hollow structure growth and deposition regulation, the petroleum's moving and enriching regulation. So it can guide the exploration of petroleum and gas effectively.This topic with a great deal of seismic data and drilling data, for foundation, with the earthquake geologic strata learn principle for guide, the geology theories and thing that combine an other a forerunner explore a technique, with a great deal of and fine seimic explain for rely on,and on the foundation of previous research, carried on a thorough research to the activity characteristics of strike-slip faults and the growth characteristic of Weibei Hollow. The previous research about the influence of Tan-Lu fault's strike-slip motion to the district structure growth mostly based on Geology data acquired by The earth's surface exploration and district gravity data.This can results more conclusion, get the understanding disunity of, even the conclusion is contrary. The angle of view of the this topic outstanding seismic, scoop out the abundant information about geology and structure motion in seismic data,and can get more information that other method or techniqueses can't reach. Through a research, it obtain the following knowledge and achievements: The growth course and growth features of Weibei Hollow are controlled by the Tan-Lu fault's strike-slip motion. It's growth mechanism gives priority to strike-slipping and pulling apart,and is complemented by transrotation.The motion of the Tan-Lu fault zone and the growth of Weibei Hollow is effected of two powers ,one is from the nosediving of the Pacific Plate,the other is from the collision of Indian Ocean. The active extension of westen part of fault results the growth of Weibei Hollow by sinking in the north and overlapping in the south.The discontinuous sinistral transpression of Tan-Lu fault zone results discontinuous growth of the Weibei Basin.Through sinistral transpression the Weibei Hollow strengthen its basin structure of dustpan from The difference lifts to rise, and promoted the growth of weibei Convex also. The Tan-Lu fault's strike-slip motion before Eocence epoch,controlled the formation of horst-graben structure. The difference of structure characteristic from the east to the west because of the horst-graben structure produced importance influence on later structure evolution. The Tan-Lu fault's strike-slip motions also control the inferior faults'growth characteristic, and the convex's ancient landforms characteristic formed from it controlled the hollow's filling and the growth characteristic of fan-bodies.There are good corresponding beteen the tectonic evolution of the Weibei Hollow and the strike-slip course of Tan-Lu Fault.The motion of Tan-Lu Fault that can be announced by the earthquake section was began whith the last stage of Jurassic Period,and lasting after Pliocene.The last motion of dextrorotary extension slip was in the Miocene period.The Bohai Basin and the The Weibei Hollow have the similar growth mechanisms and the similar growth characteristics.They are all the result of apulling apart by the Tancheng-Lujiang fault zone strike-slipping. The strike-slip motion of Tan-Lu Fault also produces an important control function on the structure evolution,the strata deposition,the hydrocarbon source rock distribution and the hydrocarbon reservoir formation of the Bohai Basin.