重力梯度法的應(yīng)用及改進(jìn)

1、重力梯度法的應(yīng)用及改進(jìn)        【中文摘要】本文研究并局部改進(jìn)了一種較新的求解地下構(gòu)造體位置和深度的方法-重力梯度法。隨著重力梯度儀的改進(jìn)和實(shí)測(cè)重力梯度精度的進(jìn)步,重力梯度法必將越來(lái)越得到人們的重視和廣泛應(yīng)用。重力梯度法不僅可以確定密度變化角點(diǎn)的位置和傾角的大小,而且不需要用事先估計(jì)和給定構(gòu)造密度。將測(cè)得的或計(jì)算的梯度空間參量圖與模型梯度空間參量圖進(jìn)行對(duì)比,可以快速、定量的確定構(gòu)造的幾何形態(tài)和位置。本文應(yīng)用重力梯度法對(duì)敦密斷裂和雞東斷陷進(jìn)行了處理,并作出了初步的地質(zhì)解釋。');【Abstract】 I

2、n this *, a research and partial improvement in the new structure for the ground floor of location and depthmethod is gravity gradient method. Gravity gradient is the rate of change of gravity, with a higher proportion of abnormal resolution; Gradient of gravity anomalies can be more careful not onl

3、y to reflect market sources on structural form, and can more accurately identify the location of mutation density and depth. As the gravity-gradient and improve the accuracy of the measured gravity gradient increase, measured in actual value of gradient structure is very important in the inversion o

4、f the value of gravity gradient method will be more and more people's attention and extensive application. gravity gradient anomalies can be more careful not only to reflect market sources on structural form, and can more accurately determine the location and density of mutation depth.Ground Flo

5、or, 2 D structure similar to the gravity gradient profile included on the depth, size and structure (geometry) the identifying information. Gradient space plans (that is, the level gradient and vertical gradient) provides the ideal amplitude and phase information. Gravity gradient method based on th

6、e above information to determine the density in the corner location (including the location and level of depth), the angle at the same time be the size of those in other inversion is difficult to determine the geometric parameters; gravity gradient in the process of interpretation With the prior est

7、imation and gravity gradient do not need to be constructed density, which is another advantage of this method.The past, a lot of work that, in accordance with plans to stage space gradient model is ideal structural interpretation is feasible. As gradient space plans include the qualitative and quant

8、itative information, will be measured or calculated parameters of the gradient of space plans and models of space parameters gradient map contrast, can quickly and quantitatively determine the structure of the geometric shape and location.To carry out the Dunmi faults and the Jidongt fault in the ac

9、tual data processing: First, the use of gravity-vertical second derivative different direction and the level of second derivative of the large unknown regional sweep of the information, extracted from deep fault and fault-long regional Secondly, using gravity gradient method further Solving these re

10、gions in particular changes in density of the underground section corner location (including the level of location and depth) and the size of angle and then, the gravity gradient of the results of other conventional treatment methods and the results were compared, both in line with That a high degre

11、e of reliability, the larger of the two different reasons, the initial geological interpretation.Gravity gradient method are mainly used in small regional tilt level of calculation, the tower and the regional level on the calculation of a certain shortcomings. We in the relatively larger in order to

12、 the region to the direct use of the advantages of gravity gradient method, that is not necessary to consider the factors and density can be constructed in the ground floor of the geometric parameters such as gravity inversion in general it is difficult to get the data. We have adopted a large area

13、in the gravity anomaly in the vertical and horizontal second derivative of and to remove the wrong message, gravity-gradient method of calculation to create a suitable interval. And then the large-scale fault and fault-long belt of multiple-part. And a number of these were part of the interpretation

14、 and calculation. Then their overall interpretation. The inversion of gravity of other methods. We can be relatively accurate data closer to the actual results and conclusions. Based on the fault of the Dun miand jidong faulted the study, according to our law of gravity gradient in the region to exp

15、lain the calculation and improve a total of a few major regions, respectivelyThe Faulted of Jingbohu Faulted,Ning An Fault, xiachengzi off Long, jidong Faulted four most。Which focuses on the jidong rift was explained that the verification of the gravity of the gradient in the practical application o

16、f the feasibility.Also in the actual interpretation of a number of factors explain the existence of our influence, as in Jingpohu region, due to its fault of the relatively large, around the major fault zone on the impact of very large, For example, Dunhua - Tianqiaoling fracture and the JinKeng fra

17、cture and northwest of the Changting period - the Emu fracture. As this article in a selected direction perpendicular to the North for the North to the Orient. So different from the direction of these faults, so that we explained in the process, because of the lack of precision, many small-and the f

18、ault will be overlooked. Fault zone in Ningan。As Mudanjiang fracture, the Jinkeng all across the fracture and that they formed a cross many small fault zone is broken,in the accuracy of the data 1:100 000, these are difficult to reflect.So in real terms, we should, as far as possible with greater accuracy of the data, such as 1:20 000. This will in some small accuracy in response to the underground structure to a very accurate show, in the judgement of the gradie