本文關(guān)鍵詞： 航磁異常查證 高精度磁法勘探 綜合剖面測(cè)量 鐵礦　出處：《石家莊經(jīng)濟(jì)學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文主要介紹了地球物理勘探方法在內(nèi)蒙古阿拉善地區(qū)航磁異常查證方面的應(yīng)用。本次查證區(qū)由兩個(gè)分區(qū)組成,分別為阿拉善左旗的72-124、125、126航磁異常查證區(qū)和阿拉善右旗的72-193航磁異常查證區(qū),面積分別為36.12km2、39.25km2。本次查證的目的是為了復(fù)核航磁異常的位置,進(jìn)一步圈定地面高精度磁法測(cè)量范圍,研究異常分布特征;通過對(duì)磁異常的定性和定量解釋,初步了解引起異常磁性體的性質(zhì)、規(guī)模、埋深、產(chǎn)狀;采用鉆探工程對(duì)異常進(jìn)行深部驗(yàn)證,查明引起異常的原因。在尋找鐵礦床的同時(shí),注意尋找與弱磁性地質(zhì)體和基性、超基性巖有關(guān)的多金屬礦產(chǎn);對(duì)礦致異常的含礦性及礦(化)體規(guī)模進(jìn)行大致控制,為進(jìn)一步工作提供依據(jù)。通過在該區(qū)進(jìn)行野外踏勘及區(qū)內(nèi)資料的收集工作,了解了工作區(qū)的地質(zhì)概況、地球物理特征及航磁異常特征。查證方法主要采用高精度磁法測(cè)量并輔以激電中梯剖面測(cè)量、激電測(cè)深,并應(yīng)用鉆探進(jìn)行鉆孔驗(yàn)證。野外施工設(shè)計(jì)了1:1萬高精度磁法測(cè)量75.37km2、1:2000磁測(cè)剖面20km、1:5000地質(zhì)物探綜合剖面30km、鉆探1013.85m,并獲取鉆孔原生暈樣103件。本次航磁異常查證工作共圈定六個(gè)地磁異常區(qū),復(fù)核了航磁異常區(qū)的存在,并對(duì)異常數(shù)據(jù)進(jìn)行了數(shù)據(jù)處理及解譯推斷。配合鉆探驗(yàn)證,推斷出區(qū)內(nèi)的高磁異常是由蝕變巖類和變質(zhì)巖類引起。原推測(cè)引起磁異常的鐵礦床和與弱磁性有關(guān)的地質(zhì)體以及基性、超基性巖有關(guān)的多金屬礦產(chǎn)存在的可能性不大。
[Abstract]:This paper mainly introduces the application of geophysical exploration method in the investigation of aeromagnetic anomalies in Alashan area, Inner Mongolia. The area of 72-124Flag and 72-193 aeromagnetic anomaly verification area of Alashan left Banner and Alashan right Banner, respectively, are 36.12km2, 39.25km2. The purpose of this investigation is to check the position of aeromagnetic anomaly and to further delineate the measuring range of surface high precision magnetic method. Through qualitative and quantitative interpretation of the magnetic anomalies, the properties, scale, depth and occurrence of the abnormal magnetic bodies are preliminarily understood, and the deep anomalies are verified by drilling engineering. To find out the causes of anomalies. While looking for iron ore deposits, attention should be paid to the exploration of polymetallic minerals related to weak magnetic geological bodies and basic and ultrabasic rocks, and to the general control of the ore-bearing characteristics of ore anomalies and the scale of ore-bodies (ore-bodies). To provide the basis for further work. Through the field survey in the area and the collection of data in the area, the geological profile of the work area has been understood. Geophysical characteristics and aeromagnetic anomalies. The verification methods are mainly measured by high precision magnetic method and supplemented by the profile measurement of the middle step of IP. In the field construction, the magnetic survey of 75.37 km ~ 2 ~ 2 ~ 1% ~ 1: 2000 magnetic section 20 km ~ 1: 5 000 geophysical comprehensive section 30 km, drilling 1013.85 m, and 103 primary halo samples of borehole were designed. The aeromagnetic anomaly verification work was carried out in a total circle. Determine six geomagnetic anomaly areas, The existence of aeromagnetic anomaly area is checked, and the abnormal data are processed and interpreted and inferred. It is inferred that the high magnetic anomalies in the area are caused by altered rocks and metamorphic rocks.
【學(xué)位授予單位】：石家莊經(jīng)濟(jì)學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P631.222

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本文編號(hào)：1510597