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Gravity and Magnetic Potential Field Conversion Research and Application

Author: ChenYongLing
Tutor: HuPing
School: Chengdu University of Technology
Course: Solid Earth Physics
Keywords: Potential field conversion Gravity and magnetic anomaly LALAcopper mines
CLC: P631
Type: Master's thesis
Year: 2013
Downloads: 49
Quote: 0
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Abstract


Gravity and Magnetic exploration as a potential field exploration method, because the volume effect or abnormal superimposition effect, gravity and magnetic data interpretation are often poor accuracy, also difficult to depth location. Therefore, the Gravity and Magnetic data processing a main explanation is the anomaly separation, so as to highlight the anomalies of useful information, to distinguish different source of anomaly. The conversion process is one of the effective methods of potential field anomaly separation.This paper calculated the derivative cylinder, polygon model of gravity and gravity horizontal derivative, vertical first derivative and vertical two order, relationship between gravity and the derivatives of the initial establishment of conversion. In the model design, distribution characteristics of the gravity anomaly derivative conversion in different structure, and summarizes the change rule curve, model experiments confirmed that the resolution and the method has a higher accuracy in distinguishing horizontal stacking anomalies, vertical stacking anomalies etc.; also calculate the gravity and magnetic anomalies of different height of polygonal models. Up (down) extension, three different methods to compare the effectiveness of.In order to obtain the complex geological structures of abnormal, the gravity data to carry out the high order derivative treatment and test analysis on structure, analyzed the change characteristics of2D profile, the actual ground high-precision magnetic survey data of upward, downward continuation treatment, to study the regional background and highlight the shallow source differences. Structure, the distribution of underground abnormal body is determined, in good agreement with other geophysical methods of inference, achieved good practical results.

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration
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