The Study Of Tectonic Characteristics Using Gravity And Magnetic Data In Tuha Basin

TheTuHa basin is one of China’s important petroleum basins, with former Cambrian crystalline basement and ancient born industry basement fold double basal, formed in the late Permian, can be divided into central, eastern HaMi depression, the uplift and western turpan faulted reservoir.The TuHa basin of heavy magnetic data processing, get all sorts of heavy magnetic anomalies basic datum, the magnetic field of the heavy are analyzed, and combining previous research results, TuHa basin have been studied to speculate about what the fracture system, using2.5D gravity inversion technique, fitting the two basin profile, and local heavy magnetic anomalies of the qualitative explanation. The main achievements made and conclusions are as follows:(1) In the study area by gravity and magnetic material processing, get all kinds of information of the fracture structure reflects the basic datum, with geological material suss out the fracture system. The main fracture to the north east to and for east-west, they control the basin and internal development basin boundary layer of the main exhibition cloth characteristics.(2) According to two gravity profile fitting inversion result, basin, in the new world of the distribution and the tectonic units of contact relation, namely the TuHa basin and its south side sleep tower case after anticline and north of the TianShan mountains north of drape a fault contact relationship.(3) Basin local structure development, local structure to study area and macro regional structure to consistently, is north west to (near east-west), local structures obviously the fault control. Development of the local gravity high in the basin basement uplift, mainly by small amplitude drape (extrusion anticline) and broken long three aspects of the geological structure factors. Development of the local gravity low in basin mainly by the basal sag, broken concave, the mountains in (in the new world, local thickening) and granite or by granite and new world role in four aspects of the geological factors. Development of the local magnetic high in basin mainly by magnetic igneous rock, the magnetic material and sedimentary rock in Precambrian metamorphic crystalline basement geological factors caused three aspects.