The Interpretation Study Of Large Faults Gravity Anomaly In Northeast China

Based on analyzing and summarizing the previous gravity survey data processingmethods, the paper of "national mineral resource potential evaluation" project summary of the results of the research study gravity faults part, the use of a new method to calculate the fault location fault structure in Northeast China for further study by the Tan Lu fault northern section- known fault segment compared according to Yi Shu verification confirmed the feasibility of the method of oblique derivative derivative level, the faults framework in Northeast China, as well as the relationship between the fracture frame superimposed tectonic units and the Northeast and mineral distribution show, received preliminary forecast initial fracture ore- controlling new understanding of oil, gas and minerals, and to further explore the structural framework of gravity- magnetic anomaly in Northeast China and its relationship with the resource. Exploration in the region to provide an important basis.Through the study of the northeast of the study area, the main findings of this article are as follows:(1) This study gravity in a variety of model body in the presence of abnormal levels of the first derivative, vertical first order derivative of the profile curve anomalies oblique derivative and oblique derivative horizontal derivatives of, summed up the four derivative method in the detection the validity of the geological characteristics of the known occurrence according to Shu fault segment, verification methods; application of the model boundary errors in the case and constraints.(2)The use of the northeastern region of Bouguer anomaly map and the remaining anomaly map of the Northeast region gravity partitions; combining basic geological background research data, results of previous understanding to give basic understanding of different plots and plots combined with abnormal partition boundaries, in mathematics and physics based on gravity anomalies reflect the block volume effect on the geological characteristics of Zigudaojin objectively reveal several tectonic movements combined effect;(3) With oblique oblique derivative and derivative level derivative method in Northeast gravity data inversion to obtain a large area of buried faults framework, and the primary fracture preliminary interpretation, and evaluation of projects of national mineral potential fracture outcomes gravity inferred preliminary comparison;and through the interception of profile data for the Daxinganling mountains tilt direction of the fault zone of deep preliminary judgment.(4)By using inferred buried fault with large oil and gas resources, solid minerals distribution were analyzed to obtain the basic characteristics of the Northeast fracture and hydrocarbon and solid mineral distribution relations;...