本文選題：萊州灣 + 磁異常解釋��； 參考：《中國(guó)科學(xué)院大學(xué)(中國(guó)科學(xué)院海洋研究所)》2017年碩士論文

【摘要】：隨著中國(guó)經(jīng)濟(jì)的快速發(fā)展,我國(guó)對(duì)黃金的需求量逐年增加,已連續(xù)多年位居世界之首。黃金需求量的提高增加了金礦勘探任務(wù)。膠東地區(qū)金礦資源豐富,且金礦床的分布與斷裂構(gòu)造密切相關(guān)。但近年來膠東地區(qū)淺、表部和陸地礦日益減少,勘探任務(wù)逐漸轉(zhuǎn)向海域。高精度的磁測(cè)資料對(duì)于尋找斷裂帶的分布具有非常廣的應(yīng)用,本研究的目的是利用高精度磁力測(cè)量資料和地質(zhì)資料推測(cè)萊州灣某海域的斷裂帶分布,預(yù)測(cè)金礦成礦靶區(qū)。研究區(qū)域的巖石建造主要為變質(zhì)巖建造、砂巖建造、巖漿巖建造和礫巖建造幾種類型,巖漿巖中的郭家?guī)X型和玲瓏型花崗巖與金礦的形成最為密切。整個(gè)膠東地區(qū)的構(gòu)造特征類似棋盤的形狀,基底褶皺構(gòu)造主要為東西向,主要斷裂構(gòu)造線以北東-北北東向、東西向?yàn)橹?還發(fā)育部分北西向的構(gòu)造。三山島斷裂是與研究區(qū)域密切相關(guān)的斷裂,實(shí)地勘查三山島斷裂從上到下依次為:膠東巖群巖層、未蝕變的玲瓏花崗巖、弱至中等鉀長(zhǎng)石化或黃鐵絹英巖化花崗巖帶、斷層泥帶、中等至強(qiáng)烈黃鐵絹英巖化花崗巖帶、中等至強(qiáng)烈鉀長(zhǎng)石化花崗巖帶、未蝕變的郭家?guī)X花崗閃長(zhǎng)巖。由磁異常等值線圖、平面剖面圖等圖件,在研究區(qū)域劃分出10個(gè)磁異常,對(duì)每個(gè)磁異常進(jìn)行了單獨(dú)的解釋,利用經(jīng)驗(yàn)切線法等方法得到各個(gè)磁異常地質(zhì)體的異常中心、長(zhǎng)軸短軸、埋深等數(shù)據(jù)。利用磁異常解析延拓、導(dǎo)數(shù)、化極的圖件推測(cè)出研究區(qū)域北西向的F1斷裂、F2斷裂和F3斷裂三條斷裂帶,同時(shí)基于ModelVision解釋平臺(tái),進(jìn)行二度半人機(jī)交互反演建模,根據(jù)高精度磁測(cè)數(shù)據(jù)反演推測(cè)出三個(gè)斷裂的可能空間展布形態(tài)、賦存位置。經(jīng)過對(duì)F1斷裂帶和F2斷裂帶的觀察研究,根據(jù)磁異常的錯(cuò)動(dòng)分布,追蹤到一條北東向的斷裂帶,根據(jù)現(xiàn)有的地質(zhì)資料推斷,該斷裂很有可能是三山島斷裂在研究區(qū)域的延伸。單一的利用高精度磁測(cè)資料對(duì)研究區(qū)域做解釋推斷具有多解性,如果增加其它地球物理、地質(zhì)、化探的勘查資料,則能更好的解釋和評(píng)價(jià)研究區(qū)域的構(gòu)造展布以及研究金礦床的分布。在進(jìn)一步勘查得到研究區(qū)域的其它資料后,本文所做的工作可作為進(jìn)一步研究的基礎(chǔ)。
[Abstract]:With the rapid development of China's economy, China's demand for gold has increased year by year and has been ranked first in the world for many years. The increasing demand for gold has increased the gold exploration task. There are abundant gold resources in Jiaodong area, and the distribution of gold deposits is closely related to fault structure. However, in recent years, the area of Jiaodong is shallow, the surface and land deposits are decreasing day by day, and the exploration task is gradually turning to the sea area. The high-precision magnetic data are widely used to find the distribution of the fault zone. The purpose of this study is to predict the distribution of the fault zone in a certain sea area of Laizhou Bay by using the high-precision magnetic measurement data and geological data, and to predict the ore-forming target area of gold deposits. The rock formations in the study area are mainly metamorphic formation, sandstone formation, magmatic formation and conglomerate formation. The Guojialing type and Linglong type granite in magmatic rock are most closely related to the formation of gold deposits. The tectonic characteristics of the whole Jiaodong area are similar to those of the chessboard, the basement fold structure is mainly east-west, the main fault line is NE NE, E W is dominant, and some NW trending structures are also developed. Sanshandao fault is a fault closely related to the study area. The sequence of field exploration of Sanshandao fault from top to bottom is as follows: rock formation of Jiaodong rock group, unaltered Linglong granite, weak to medium potassium feldspar or Huangtianshinite granite belt. Fault gouge zone, medium to strong Huangtaishinite granite belt, medium to strong potash feldspar granite belt, unaltered Guojialing granodiorite. From the isoline map and plane section map of the magnetic anomaly, 10 magnetic anomalies are divided in the study area, and each magnetic anomaly is explained separately. The anomalous center of each geomagnetic anomaly is obtained by means of the empirical tangent method. Long axis short axis, buried depth and other data. Three fault zones of F _ 1 fault F _ 2 fault and F _ 3 fault are inferred from the map of magnetic anomaly analytic continuation, derivative and polarization. Based on the ModelVision interpretation platform, the two-degree semi-human-computer interactive inversion modeling is carried out. Based on the high precision magnetic data, the possible spatial distribution and location of the three faults are inferred. Based on the observation and study of F1 and F2 fault zones, a NE fault zone was traced according to the dislocation distribution of magnetic anomalies. According to the existing geological data, the fault is probably an extension of Sanshandao fault in the study area. The single use of high-precision magnetic data to interpret and infer the study area has multiple solutions. If other geophysical, geological and geochemical exploration data are added, It can better explain and evaluate the tectonic distribution of the study area and the distribution of the gold deposits. The work done in this paper can be used as the basis of further research after further exploration and other data of the study area.
【學(xué)位授予單位】：中國(guó)科學(xué)院大學(xué)(中國(guó)科學(xué)院海洋研究所)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.51;P631.2

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