本文選題：哈密 + 銅礦�。� 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：為圈定研究區(qū)域銅礦的找礦靶區(qū)并查明隱伏礦體的空間分布,應(yīng)用高精度地面磁測(cè)、激電測(cè)深和可控源音頻大地電磁測(cè)深進(jìn)行綜合物探,研究該礦區(qū)地面磁異常特征,進(jìn)行間接尋找無磁性的銅礦。首先利用插值切割法將磁異常分為區(qū)域異常和局部異常,即將磁異常分成深部場(chǎng)源和淺部場(chǎng)源所引起;其次對(duì)磁異常值進(jìn)行延拓處理,消除局部突變異常;最后用經(jīng)驗(yàn)切線法和2.5D聯(lián)合反演以確定磁異常源的埋藏深度,再結(jié)合地質(zhì)情況,對(duì)磁異常的地質(zhì)原因進(jìn)行初步分析推斷。而激電測(cè)深能夠在擬斷面上,顯示異常體的形態(tài)及埋深。CSAMT測(cè)深能夠獲得斷面上的電性特征,從而推斷深部高阻和低阻層的空間分布特征。最后對(duì)三種物探異常的特征進(jìn)行綜合分析,推斷區(qū)內(nèi)地質(zhì)構(gòu)造及銅礦(化)分布。論文以哈密某銅礦為例,應(yīng)用高精度磁測(cè)得到兩個(gè)強(qiáng)磁異常區(qū)域C1和C2,結(jié)合地質(zhì)特征和地球物理特征以及地球化學(xué)特征情況,確定C1異常區(qū)為銅礦預(yù)查靶區(qū)。通過布設(shè)在C1高磁異常區(qū)的三條測(cè)線的激電測(cè)深結(jié)果,推測(cè)出深部有高極化、低電阻、強(qiáng)磁性的板狀體,其走向近東西,產(chǎn)狀近乎直立的金屬硫化物礦(化)體,因地表未見出露,具體的地質(zhì)情況需要在工程揭露后予以確認(rèn)。在CSAMT測(cè)深剖面獲得多個(gè)高低阻層。將這些高低阻層與磁異常關(guān)聯(lián),認(rèn)為磁異常與構(gòu)造、地層的關(guān)系較為緊密,不排除構(gòu)造成礦的可能性。上述幾種物探方法在哈密銅礦區(qū)的應(yīng)用研究表明:綜合物探能較準(zhǔn)確地圈定銅礦的找礦靶區(qū),比較準(zhǔn)確地反映礦體的走向、位置、埋深和形狀等;可以有效的推測(cè)隱伏礦體及斷裂的空間分布情況。
[Abstract]:In order to delineate the prospecting target area of copper ore in the study area and find out the spatial distribution of the hidden ore body, the high precision ground magnetic survey, the excitation sounding and the controllable source audio magnetotelluric sounding are used for comprehensive geophysical exploration. The ground magnetic anomaly characteristics of the mining area are studied and the non magnetic copper mines are searched indirectly. Firstly, the magnetic anomalies are divided into regions by interpolation cutting method. The anomalies and local anomalies are caused by the magnetic anomaly divided into the deep field source and the shallow field source. Secondly, the magnetic anomaly value is extended to eliminate the local mutation anomaly. Finally, the buried depth of the magnetic anomaly source is determined by the empirical tangent method and the 2.5D combined inversion, and the geological reasons of the magnetic anomaly are preliminarily analyzed and deduced. The excitation power sounding can show the shape of the abnormal body and the depth of the depth.CSAMT sounding to obtain the electrical characteristics on the cross section, so as to infer the spatial distribution characteristics of the deep high resistance and the low resistivity layer. Finally, the characteristics of the three geophysical anomalies are synthetically analyzed to infer the quality structure and the copper mine distribution in the area. The paper is based on a certain copper in Hami. As an example, two strong magnetic anomaly regions C1 and C2 are obtained by high precision magnetic measurement. According to the geological features, geophysical characteristics and geochemical characteristics, the C1 anomaly area is determined as the precheck target area for copper mines. The results of the three lines set in the high magnetic anomaly area of the C1 are obtained by the result of the polarization, low resistance and strong magnetism. The plate body, which goes to the near east-west, produces near erect metallic sulfide ore (chemical) body, has not been exposed on the ground, and the specific geological conditions need to be confirmed after the project is exposed. A number of high and low resistivity layers have been obtained in the CSAMT sounding section. The application of these geophysical prospecting methods in Hami copper ore area shows that comprehensive geophysical prospecting can accurately delineate the prospecting target area of copper ore, and accurately reflect the direction, position, depth and shape of the ore body, and can effectively speculate on the spatial distribution of hidden ore bodies and faults.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.41;P631

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本文編號(hào)：1924949