物探技術(shù)在肅州區(qū)地?zé)峥辈橹械膽?yīng)用研究
本文選題:地?zé)峥辈?/strong> + 地球物理勘探 ; 參考:《中國地質(zhì)大學(xué)(北京)》2017年碩士論文
【摘要】:地球物理勘探是深部地?zé)豳Y源調(diào)查的重要手段之一。根據(jù)現(xiàn)場地形、地質(zhì)條件,本論文面臨探測深度大、干擾噪聲強、要求精度高的挑戰(zhàn),單一的地球物理方法很難準(zhǔn)確定位預(yù)測礦體的產(chǎn)出及賦存狀態(tài),需綜合利用物探方法,相互約束,相互補充,才能取得良好的找礦效果[1]。前期依據(jù)區(qū)域航磁異常布設(shè)高精度磁測剖面,繼而布設(shè)高精度重力剖面測量,反演確定區(qū)域基底的劃分[1];后期進行瞬變電磁剖面測深和可控源音頻大地電磁剖面測深,進行地層巖性電性劃分,確定中新生代盆地邊緣基底埋深、斷裂構(gòu)造位置、產(chǎn)狀及熱儲的分布范圍和深度。推斷出具有圈定地?zé)豳Y源最佳開發(fā)地段,為確定地?zé)徙@探孔位布設(shè)提供地球物理依據(jù)。通過對勘查區(qū)的實地調(diào)查,結(jié)合區(qū)域地質(zhì)資料、研究成果,對物探數(shù)據(jù)進行了綜合分析研究,推斷出了 F1、F2和F8三條具有較好成熱前景的主要斷裂構(gòu)造帶,并判斷此3條斷裂帶地?zé)岢蔁釛l件成熟,提出了地?zé)徙@孔試驗孔位布設(shè)建議,達到了本次勘查的目的。
[Abstract]:Geophysical exploration is one of the important means of deep geothermal resources investigation. According to the field topography and geological conditions, this paper is faced with the challenge of high detection depth, strong noise interference and high precision. It is difficult for a single geophysical method to accurately locate and predict the occurrence and occurrence of orebodies, so it is necessary to make comprehensive use of geophysical methods. In order to obtain good prospecting effect, mutual restraint and mutual supplement can be achieved. According to the regional aeromagnetic anomalies, high precision magnetic profiles are arranged in the early stage, and then high precision gravity profile measurements are arranged to determine the division of the regional basement [1], the transient electromagnetic profile sounding and the audio magnetotelluric profile sounding with controllable sources are carried out in the later stage. Stratigraphic lithologic electrical division is carried out to determine the basement depth of Mesozoic and Cenozoic basin margin, the location of fault structure, the distribution range and depth of occurrence and heat storage. It is inferred that the best exploitation area of geothermal resources is delineated, which provides geophysical basis for determining the location of geothermal drilling holes. Based on the field investigation of the exploration area, combined with the regional geological data and the results of the research, the geophysical data were comprehensively analyzed and studied, and the three main fault structural zones of F1, F2 and F8 with good thermal potential were inferred. Based on the judgement of the maturity of geothermal formation conditions in these three fault zones, suggestions for the placement of test holes in geothermal boreholes are put forward, and the purpose of this exploration is achieved.
【學(xué)位授予單位】:中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:P631;P314
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