激电法与磁法综合勘探钛磁铁矿的应用研究

发布时间：2018-06-09 17:48

本文选题：磁异常 + 比值圆交汇反演　；参考：《成都理工大学》2015年硕士论文

【摘要】：钛磁铁矿是具有强磁性低阻高极化的金属矿,因此激电法和磁法对于勘探钛磁铁矿非常适合。这两种方法结合起来,能互补各自的不足,可以更好、更准确地推断钛磁铁矿的赋存情况。本文以青海某多金属矿勘探项目为依托,对研究区磁性和电性特征进行了研究和分析。磁测扫面共确定了8个磁异常(I至VIII号);在其中主要且具有成矿远景的异常上,布置了四条磁测精测剖面测线和两条激电测深测线进行剖面测量,以便确定异常性质及场源体的断面特征。运用化极、解析延拓、人机对话式的选择反演方法和矢量强度比值圆法对磁异常进行了处理及反演。利用化极、解析延拓处理后的资料,圈定了8异常区及推断一条近南北走向的断裂和一条近东西走向的断裂;经过2.5D人机对话式选择反演法和矢量强度比值圆法,大致推断出四条剖面上的异常体的产状、倾向及埋深。对于固定点源测深剖面运用圆弧交汇法进行处理解释。大致推断出两条激电测深剖面异常体的埋深及倾向。综合激电和磁测异常特征,并结合地质资料分析,取得如下成果:1、推断研究区域西北部钛磁铁矿赋存较少,埋藏不深;钛磁铁矿主要赋存在东北部;而南部地质构造比较复杂,需综合其它资料加以分析。2、在研究区圈定了I号、II号、III号、VI号四个有很好的寻找钛磁铁矿的前景的异常区,其中II、III号钻孔已经见有钛磁铁矿,埋深大约200米。3、在研究区内推测存在一条近南北走向的断裂带F1和一条近东西走向的断裂带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.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.3;P631.2

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