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【摘要】：激發(fā)極化法是目前探測侵染狀金屬硫化物、氧化物以及斑巖型金屬礦床的最有效的地球物理方法之一,具有較高的分辨率和工作效率。四川礦產(chǎn)資源豐富,種類齊全,在全國具有舉足輕重的地位。隨著多數(shù)礦區(qū)地表礦的日益減少,尋找隱伏和中深部礦床成為深部找礦的重要任務(wù)。本論文對拉拉(石龍)銅鐵礦的激發(fā)極化法資料進行了處理解釋,為查明該區(qū)域內(nèi)斷裂構(gòu)造的空間分布、對異常體的影響、圈定礦床異常區(qū),確定礦體深度、形態(tài)、位置等提供依據(jù)。本論文主要工作和成果包括:(1)從分析拉拉石龍銅鐵礦床的地質(zhì)概況和地球物理特征入手,根據(jù)前期工作資料分析,用激電工作方法進行局部礦床勘探試驗。(2)使用有限元方法實現(xiàn)激電二維正演數(shù)值模擬,對不同地層數(shù)、板狀體的不同傾斜方向以及起伏地形等模型進行對比分析,獲得垂直板狀體和水平板狀體的激電正演擬斷面圖及它們的區(qū)別標(biāo)志。(3)采用突出低阻高極化異常的視激電率參數(shù)和顯示炭質(zhì)板巖異常的自然電位參數(shù)綜合分析,多角度地對激電異常進行分析和合理推斷。(4)通過對研究區(qū)采集的激電中梯掃面和激電對稱四極測深觀測數(shù)據(jù)進行預(yù)處理,使用最小二乘反演程序反演對稱四極實測數(shù)據(jù),對剖面異常和對稱四極反演的視電阻率和視極化率異常做出初步的判斷和解釋。(5)結(jié)合該剖面收集到的音頻大地電磁測深法資料對結(jié)果進行了合理的推斷解釋,圈定了礦體異常,有一定的實際意義。
[Abstract]:The method of induced polarization is one of the most effective geophysical methods for detecting invasive metallic sulphides oxides and porphyry metal deposits with high resolution and efficiency. Sichuan is rich in mineral resources and has a wide range of resources and plays an important role in the country. With the decrease of surface deposits in most mining areas, it is an important task to search for concealed and middle deep ore deposits. In this paper, the induced polarization data of Lala (Shilong) copper ore deposit are processed and interpreted. In order to find out the spatial distribution of fault structure in this area, to influence the abnormal body, to delineate the abnormal area of ore deposit, to determine the depth and shape of ore body. Position, etc., to provide the basis. The main work and achievements of this paper are as follows: (1) from the analysis of geological and geophysical characteristics of Lala Shilong copper ore deposit, according to the previous work data analysis, (2) the finite element method is used to realize the two-dimensional forward numerical simulation of IP, and the models of different strata, different inclined direction of plate body and undulating terrain are compared and analyzed. The forward induced pseudosectional diagrams of vertical and horizontal plate bodies are obtained and their distinguishing marks are obtained. (3) Comprehensive analysis of the apparent induced rate parameters and the natural potential parameters which show the anomaly of carbonaceous slate is adopted, which highlights the anomaly of low resistivity and high polarization. (4) by preprocessing the observed data of the ladder surface and the symmetric quadrupole sounding in the study area, the symmetric quadrupole measured data are retrieved by using the least square inversion program. The apparent resistivity and apparent polarizability anomalies of profile anomaly and symmetrical quadrupole inversion are preliminarily judged and interpreted. (5) the results are reasonably inferred and interpreted in combination with the audio magnetotelluric sounding data collected from the section. The anomaly of ore body is delineated, which has certain practical significance.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.41;P618.31;P631.324

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本文編號：2428343