本文選題：磁法勘探　切入點：靈山巖體　出處：《東華理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：江西靈山巖體位于江西省上饒市境內(nèi),屬于環(huán)狀復(fù)式花崗巖體,出露在贛東北斷裂的南東側(cè)。巖體經(jīng)歷了四個重要地史階段,侵入巖類眾多,巖漿活動頻繁,礦產(chǎn)資源豐富。本文以江西省礦產(chǎn)資源調(diào)查項目為依托,在靈山地區(qū)開展1:5萬地面高精度磁測,分析研究了靈山地區(qū)成礦條件與磁異常的相關(guān)性,并對該區(qū)航磁異常進行查證。本文通過統(tǒng)計分析靈山地區(qū)采集的1300多塊巖礦石標(biāo)本磁化率,對靈山巖體及其他各類巖性的分布規(guī)律和磁性特征進行了研究。結(jié)果表明,該地區(qū)不同范圍、不同時期花崗巖的磁化率特征有所不同。對巖礦石磁化率的研究,豐富了該區(qū)的物性資料,為磁異常的解釋提供了可靠的依據(jù)。作者在大量收集和查閱靈山地區(qū)相關(guān)地質(zhì)資料和前人研究成果的基礎(chǔ)上,結(jié)合地面磁異常對靈山地區(qū)的地質(zhì)條件、成礦特征和分布規(guī)律進行了相互驗證,分析了控礦構(gòu)造、成礦特征與磁異常形成的內(nèi)在關(guān)系。在磁異常處理與轉(zhuǎn)換中,分別采用了化極、解析延拓、導(dǎo)數(shù)計算等方法,較好地突出了有用的異常信息。作者還采用匹配濾波對磁異常進行區(qū)域場和局部場的分離,據(jù)此確定了磁性地質(zhì)體的埋深,同時利用小波多尺度分解提取了不同深度磁異常信息,對比已知地質(zhì)資料可知,所提取的磁異常信息較好地反映了磁性地質(zhì)體的結(jié)構(gòu)特征,表明磁異常存在的可信性。在磁異常反演解釋中,選取了一條實測剖面,采用希爾波特變換反演和2.5D人機交互反演,在大量的模型計算的基礎(chǔ)上,取得了較好的反演效果。最后,對靈山地區(qū)的磁異常特征和形成機制進行了研究,根據(jù)磁異常預(yù)測了靈山巖體外圍的成礦遠(yuǎn)景。
[Abstract]:Jiangxi Lingshan pluton is located in the territory of Jiangxi city of Shangrao Province, which belongs to the annular composite granite body, exposed in the South East Northeast Jiangxi fracture. The rock experienced four important historical stages, intrusive rocks, frequent magmatic activities, rich in mineral resources. This paper based on the project of mineral resources in Jiangxi Province as the basis, to carry out 1:5 million high ground precision magnetic survey in the Lingshan area, analyzed the correlation of metallogenic conditions of Lingshan area and the magnetic anomalies, and the aeromagnetic anomaly verification. Through statistical analysis of Lingshan collected more than 1300 blocks of rock sample magnetic susceptibility of Lingshan rock and other types of lithologic distribution and magnetic properties were studied. The results showed that in this area, different scope, different periods of granite magnetic susceptibility characteristics are different. To study the magnetic susceptibility of rocks and ores, enrich the physical data of the area, for magnetic anomaly interpretation To provide a reliable basis. Based on the collection and access to a large number of geological data in Lingshan area and the results of previous studies, combined with the ground magnetic anomaly on the geological conditions of Lingshan area, the metallogenic characteristics and distribution rules of mutual verification, analysis of the ore control structure, internal relation and magnetic anomaly characteristics of ore formation. In the magnetic anomaly processing and conversion, the pole, the analytic continuation and derivative calculation methods, reflect the abnormal information useful. The author also used to separated region field and the local magnetic anomalies of matched filtering, to determine the depth of magnetic geologic body, and the use of multi-scale wavelet decomposition the different depth of the magnetic anomaly information extraction, comparison of the geological data shows that the extracted magnetic anomaly information can reflect the structural characteristics of magnetic geologic body, show that the magnetic anomaly existing in magnetic credibility. Anomaly inversion interpretation, selecting a survey section, using the Hill Porter transform inversion and 2.5D interactive inversion, based on a large number of calculation model, achieved good inversion effect. Finally, the magnetic anomaly characteristics in Lingshan area and the formation mechanism was studied according to the magnetic anomaly predicted metallogenic rock body in Lingshan periphery.

【學(xué)位授予單位】：東華理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631

【參考文獻】

相關(guān)博士學(xué)位論文 前1條

1 李麗麗;地球物理（重磁震）勘探數(shù)據(jù)一體化解釋技術(shù)[D];吉林大學(xué);2013年

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本文編號：1631844