發(fā)布時間：2018-06-03 01:10

  本文選題：隆昌-青城子-劉家河 + 三維地質(zhì)結(jié)構(gòu)　； 參考：《吉林大學》2017年碩士論文

【摘要】：隨著地質(zhì)調(diào)查和礦產(chǎn)地質(zhì)調(diào)查的不斷深入,近地表礦產(chǎn)資源已得到了充分勘探開發(fā),而地下深部礦產(chǎn)資源潛力巨大。利用先進有效的深部地質(zhì)探測方法和手段揭示地下深部地質(zhì)結(jié)構(gòu),采用三維地質(zhì)建模技術(shù),可以使地下一定深度范圍(3-5km以淺)內(nèi)的主要地質(zhì)結(jié)構(gòu)和物質(zhì)組成透明化,從而可以加深地下地質(zhì)結(jié)構(gòu)、物質(zhì)組成和成礦規(guī)律的認識,為深部地質(zhì)找礦提供科學依據(jù)。本文基于遼東地區(qū)的1∶50萬和1∶25萬區(qū)域地質(zhì)資料、1∶10萬重力資料、1∶10萬航磁資料,采用圖切地質(zhì)剖面、二維人機交互重磁剖面反演、地球物理剖面處理與解釋、三維地質(zhì)建模等方法,開展了遼寧東部隆昌-青城子-劉家河地區(qū)深部地質(zhì)結(jié)構(gòu)的研究,獲取了研究區(qū)許多新的深部地質(zhì)與深部礦產(chǎn)地質(zhì)信息,加深了該區(qū)深部地質(zhì)特征及礦產(chǎn)地質(zhì)特征認識,主要取得了如下成果與認識:(1)在區(qū)域地質(zhì)調(diào)查和地球物理資料研究的基礎(chǔ)上,結(jié)合實測高精度重、磁剖面資料和MT測量數(shù)據(jù),揭示了遼寧東部隆昌-青城子-劉家河地區(qū)的三維地質(zhì)結(jié)構(gòu)。(2)遼吉裂谷的基底經(jīng)歷了復雜的演化過程,基底的結(jié)構(gòu)與組成遭受了后期構(gòu)造作用的強烈改造,印支期-燕山期的巖漿侵入作用在很大程度上改變了遼吉裂谷的原始內(nèi)部構(gòu)造,致使遼河群呈碎片狀散布在遼吉裂谷內(nèi)。(3)結(jié)合重磁剖面反演結(jié)果和重力異常特征,對青城子地區(qū)中生代隱伏花崗巖體的深部延伸情況進行了推斷,為查明青城子地區(qū)成礦規(guī)律和開展深部地質(zhì)找礦提供了科學依據(jù)。(4)通過航磁異常圖和橫穿連山關(guān)巖體剖面線的重磁反演結(jié)果,獲取了連山關(guān)地區(qū)褶皺、斷裂等深部地質(zhì)結(jié)構(gòu)信息,加深了連山關(guān)地區(qū)深部地質(zhì)結(jié)構(gòu)認識。(5)以按對象分塊地質(zhì)建模的思路,建立了隆昌-青城子-劉家河地區(qū)的三維地質(zhì)模型,初步實現(xiàn)了5km以淺深度范圍內(nèi)的地下地質(zhì)結(jié)構(gòu)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.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P548;P628

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本文編號：1970888