本文選題：磁異常 + 比值圓交匯反演　； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：鈦磁鐵礦是具有強磁性低阻高極化的金屬礦,因此激電法和磁法對于勘探鈦磁鐵礦非常適合。這兩種方法結(jié)合起來,能互補各自的不足,可以更好、更準(zhǔn)確地推斷鈦磁鐵礦的賦存情況。本文以青海某多金屬礦勘探項目為依托,對研究區(qū)磁性和電性特征進行了研究和分析。磁測掃面共確定了8個磁異常(I至VIII號);在其中主要且具有成礦遠景的異常上,布置了四條磁測精測剖面測線和兩條激電測深測線進行剖面測量,以便確定異常性質(zhì)及場源體的斷面特征。運用化極、解析延拓、人機對話式的選擇反演方法和矢量強度比值圓法對磁異常進行了處理及反演。利用化極、解析延拓處理后的資料,圈定了8異常區(qū)及推斷一條近南北走向的斷裂和一條近東西走向的斷裂;經(jīng)過2.5D人機對話式選擇反演法和矢量強度比值圓法,大致推斷出四條剖面上的異常體的產(chǎn)狀、傾向及埋深。對于固定點源測深剖面運用圓弧交匯法進行處理解釋。大致推斷出兩條激電測深剖面異常體的埋深及傾向。綜合激電和磁測異常特征,并結(jié)合地質(zhì)資料分析,取得如下成果:1、推斷研究區(qū)域西北部鈦磁鐵礦賦存較少,埋藏不深;鈦磁鐵礦主要賦存在東北部;而南部地質(zhì)構(gòu)造比較復(fù)雜,需綜合其它資料加以分析。2、在研究區(qū)圈定了I號、II號、III號、VI號四個有很好的尋找鈦磁鐵礦的前景的異常區(qū),其中II、III號鉆孔已經(jīng)見有鈦磁鐵礦,埋深大約200米。3、在研究區(qū)內(nèi)推測存在一條近南北走向的斷裂帶F1和一條近東西走向的斷裂帶F2。
[Abstract]:Titanomagnetite is a kind of metal ore with high polarization and high polarization, so it is suitable for exploration of titanomagnetite by IP method and magnetization method. The combination of the two methods can complement each other's shortcomings, and can better and more accurately infer the occurrence of titanomagnetite. Based on the exploration project of a polymetallic mine in Qinghai, the magnetic and electrical characteristics of the study area are studied and analyzed in this paper. A total of 8 magnetic anomalies (I to VIII) have been determined on the magnetic scanning surface, and four fine magnetic profile lines and two IP sounding lines have been arranged for profiling on the main and metallogenic potential anomalies. In order to determine the anomalous nature and field source of the cross-section characteristics. The magnetic anomalies are processed and inversed by means of polarity, analytic continuation, man-machine dialogue selective inversion method and vector intensity ratio circle method. By using the polarity and the data after continuation processing, 8 anomalous areas are delineated and a fault near the north-south strike and a near-east-west strike are inferred, after 2.5D man-machine dialogue selection inversion method and vector intensity ratio circle method, The occurrence, tendency and depth of anomalies on four sections are inferred roughly. The circular intersection method is used to interpret the fixed point source sounding profile. The buried depth and tendency of abnormal bodies in two IP sounding profiles are inferred roughly. Combining the characteristics of induced electric and magnetic anomalies, and combining with the analysis of geological data, the following results have been obtained: 1. It is inferred that there are few ilmenagnetite deposits in the northwest of the study area, and that ilmenite mainly occurs in the northeast, while the southern geological structure is relatively complex. In the study area, four anomalous areas with good prospects for looking for titanomagnetite have been delineated in the study area. Among them, ilmenite has been found in borehole IIY III. The buried depth is about 200m. 3. It is speculated that there exists a fault zone F1 near the north-south strike and a fault zone F2 near the east-west strike in the study area.
【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】：P631.3;P631.2

【參考文獻】

相關(guān)期刊論文 前2條

1 管志寧;我國磁法勘探的研究與進展[J];地球物理學(xué)報;1997年S1期

2 金鋼燮;胡祥云;超敬來;南明根;康正男;金敬七;劉慧;;復(fù)雜形體重磁異常的等參數(shù)有限元積分算法研究[J];石油地球物理勘探;2009年02期

，

本文編號：2000589