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The Application Research of Gravity-magnetic Characteristics and Its Geological Structure in Hailaer-Tamuchage Basin

Author: DaiYiJun
Tutor: ZhuZiQiang
School: Central South University
Course: Earth Exploration and Information Technology
Keywords: Hailaer-Tamuchage Basin Gravity and magneticanomalies Fault system Substrate characteristics Rift structure The roleof controlling Basin
CLC: P548
Type: PhD thesis
Year: 2012
Downloads: 71
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Hailaer-tamuchage Basin is an important station of Daqing oil field.and many works have been done here.Based on field studies and on the support of national863project,Research about forward and inversion of gravity gradient tensor and National Natural Science Foundation project. Discrimination,extraction and inversion Weak anomaly of gravity gradient tensor", structures of the basin through gravity and magnetic data analysed and studied.After confirming it reliability and effectiveness by seismic and resistivity method,A lot of gravity and magnetic work have been done to study the structure of the basin.The main contents of this paper include:(1)It analyzes the general and overall characteristics of regional tectonic location,stratigraphic,magmatic, tectonic and petroleum source,reservoir,cover and physical properties.(2)This paper made data processing and anomalies analysis for gravity and magnetic using wavelet transform and other methods.(3)The research and analysis of Haita basin fault’s gravity anomalies and the spread and the system of a large rupture is proposed in this paper.(4)Basement lithology and spatial distribution state.(5)It divided the rift tectonic unit of Haita basin and described the distribution of volcanic rocks.(6)This paper analyzed the morphology of deep structure surface and the low temperature gradient characteristics of this basin in the macro.(7)Based on the geological movement and tectonic evolution of Jiangmusi-Mongolia Block,the formation and development of Haita basin was proposed, this paper analyzes the structure features and the role of the depth structural control in the process.The results show that:the Budate and Manpower Group’s properties and sequence are quite that may belong to the same level, is the Middle Jurassic. Selecting a different gravity and magnetic data processing methods can more accurately guess the different characteristics of fracture of the structure, lithology and other geological information. The article summarized the nine regional faults of Haita basin and secondary normal basement faults associated with big faults,12deep fault system. Through the analysis of gravity and magnetic data,the basement of Haita basin is a paleozoic, proterozoic,steep and narrow furrow of the geological,the gravity inversion is difficult to achieve,so we recommend "the central rift zone" and "Bayan mountain uplift" Merging into the central rift zone. The evolution of " Jiangmusi-Mongolia Block " has gone through an accumulation of micro-plots,an accumulation of the North China platform,southern red of Siberian plate and the subduction of ancient pacific plate, it provides a basal conditions and transtensional stress for the basin’s formation and development. In this paper,through Haita basin’s boundary features, the cushion effect of the paleozoic basements,the cut, sheets,crack,break,pass of rift basin,it illustrates the control action of the structure of the crust to the cover.

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