辽东地区隆昌-青城子-刘家河三维地质结构特征

发布时间：2018-06-03 01:10

本文选题：隆昌-青城子-刘家河 + 三维地质结构　；参考：《吉林大学》2017年硕士论文

【摘要】：随着地质调查和矿产地质调查的不断深入,近地表矿产资源已得到了充分勘探开发,而地下深部矿产资源潜力巨大。利用先进有效的深部地质探测方法和手段揭示地下深部地质结构,采用三维地质建模技术,可以使地下一定深度范围(3-5km以浅)内的主要地质结构和物质组成透明化,从而可以加深地下地质结构、物质组成和成矿规律的认识,为深部地质找矿提供科学依据。本文基于辽东地区的1∶50万和1∶25万区域地质资料、1∶10万重力资料、1∶10万航磁资料,采用图切地质剖面、二维人机交互重磁剖面反演、地球物理剖面处理与解释、三维地质建模等方法,开展了辽宁东部隆昌-青城子-刘家河地区深部地质结构的研究,获取了研究区许多新的深部地质与深部矿产地质信息,加深了该区深部地质特征及矿产地质特征认识,主要取得了如下成果与认识:(1)在区域地质调查和地球物理资料研究的基础上,结合实测高精度重、磁剖面资料和MT测量数据,揭示了辽宁东部隆昌-青城子-刘家河地区的三维地质结构。(2)辽吉裂谷的基底经历了复杂的演化过程,基底的结构与组成遭受了后期构造作用的强烈改造,印支期-燕山期的岩浆侵入作用在很大程度上改变了辽吉裂谷的原始内部构造,致使辽河群呈碎片状散布在辽吉裂谷内。(3)结合重磁剖面反演结果和重力异常特征,对青城子地区中生代隐伏花岗岩体的深部延伸情况进行了推断,为查明青城子地区成矿规律和开展深部地质找矿提供了科学依据。(4)通过航磁异常图和横穿连山关岩体剖面线的重磁反演结果,获取了连山关地区褶皱、断裂等深部地质结构信息,加深了连山关地区深部地质结构认识。(5)以按对象分块地质建模的思路,建立了隆昌-青城子-刘家河地区的三维地质模型,初步实现了5km以浅深度范围内的地下地质结构的透明化。
[Abstract]:With the continuous deepening of geological survey and mineral geological survey, the near surface mineral resources have been fully explored and exploited, and the deep underground mineral resources have great potential. Using advanced and effective deep geological detection methods and means to reveal the underground deep geological structure and using three-dimensional modeling technology can make the underground depth range (3- 5km is transparent in the main geological structure and material composition in shallow, so it can deepen the understanding of underground geological structure, material composition and metallogenic law, and provide scientific basis for deep geological prospecting. Based on the regional geological data of 1: 500 thousand and 1: 250 thousand, 1: 100 thousand gravity data, 1: 100 thousand aeromagnetic data, and graphic cutting ground based on the Liaodong region Qualitative profile, two dimensional man-machine interaction gravity and magnetic profile inversion, geophysical profile processing and interpretation, and three-dimensional geological modeling have carried out the study of the deep geological structure of the Longchang Qingcheng - Liu Jia River area in eastern Liaoning, and obtained many new deep geological and deep mineral quality information in the study area, and deepened the deep geological features and ore deposits in this area. The following achievements and understanding are obtained: (1) on the basis of regional geological survey and geophysical data, combined with measured high precision, magnetic profile data and MT measurement data, the three dimensional geological structure of the Longchang Qingcheng Liaojia river area in eastern Liaoning is revealed. (2) the basement of the Liaoji Rift Valley is complicated. In the process of evolution, the structure and composition of the base have been strongly reformed in the late stage of tectonic action. The magmatic intrusion of the Indo period - Yanshan period changed the original internal structure of the Liaoji Rift Valley to a great extent. The Liaohe Group was scattered in the Liaoji rift valley. (3) the inversion results and gravity anomaly characteristics of the gravity and magnetic profiles were combined with the Qingcheng. The deep extension of the Mesozoic concealed granitoids in the subarea is inferred, which provides a scientific basis for finding out the metallogenic regularity of the Qingcheng subarea and developing the deep geological prospecting. (4) through the aeromagnetic anomaly map and the gravity and magnetic inversion results in the cross section of the Lianshan Guan rock mass, the deep geological structure of the folds and faults in Lianshan Guan area is obtained. The deep geological structure of Lianshan Guan area has been deepened. (5) the three-dimensional geological model of the Longchang Qingcheng and Liu Jia River area was established by the idea of dividing the geological modeling according to the object block, and the transparency of the underground geological structure in the shallow depth of the 5km was realized.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P548;P628

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