Researching Of Tilt Derivative And Application In Daolangheduge Mine

In the study and application of gravity and magnetic methods, on the present situation, gravity and magnetic anomalies derivative method can be the same as a seismic method, it could help us to determine or estimate the geological body underground. The derivative is considered to be a better way for defining the border of underground anomalous body.The past, exploration areas in the wild, if there is the existence of multi-source field with different depth, it is very difficult to detect the border of a deep source, because it will not significantly that the deep sources are affected by shallow sources, the amplitude of the gradient and second derivative also be affected. Since the appearance of derivative methods, determining the border of the geological bodies show a greater advantage.Usually, the formula for calculating with high precision, gravity anomaly also has a larger transmission error, and a larger impact in local interference; calculation formula for the accuracy of low transmission error also smaller. In the gravity anomaly, the useful ingredients of course and interference is not completely separate, so in the meantime we have to meet certain precision in the use of high-end as far as possible under the conditions of the formula for calculating the derivative from each other, can be used to retain the maximum element of . And in this article involved a series of tilt derivative method, is to take into account the above-mentioned high-level thinking has played a derivative formula for calculating the expertise to determine the border of geological bodies, according to other methods have a distinct advantage. By a large number of theoretical models, prove that the level of the tilt horizontal derivative and the non-absolute tilt horizontal derivative can determine the borders of the underground geological bodies sometimes, but also the production of certain geological body shape can be more accurately reflected.In the first chapter, for the gravity conventional derivative in this article, do a simple narrative explanation from mathematics, then derived the tilt horizontal derivative by a more intuitive way and some formulas, and finally, expound the non-absolute tilt horizontal derivative. Not only do the non-absolute tilt horizontal derivative boundary in geological anomaly clearly reflected, but also in gravity data processing and interpretation of geological body can give some explanation of occurrence, is better than the tilt horizontal derivative. In chapter two, I have devised a number of theoretical models, mainly tilted stage, faulting, tilting unlimited connections and unlimited extension of the limited height and tilt thick sheet derivative use of tilt horizontal derivative and non-absolute tilt horizontal derivative in imaging. Respectively different angles, depth and other conditions of the superiority of the method, and has done a horizontal comparison, get more valuable conclusions.Among them, the non-absolute tilt horizontal derivative in determining the angle of tilt in any level, tilt the border vein anomaly, in the settlement sheet, plate boundaries on issues such as the advantages are obvious, and has given us great insight. Depth in the solution is different from a different angle multi-source field geological bodies like the border issue and the middle class, as well as the division of tectonic units, the construction division, to determine the location of fault zones, distinguish between different strata of the distribution of lithology, to mapping the physical properties to determine the underground geological occurrence, such as body according to other methods have certain advantages. However, in the experimental of stage imaging, due to the level of tilt horizontal derivative abnormal curves effected by the thickness of tilting stage, the residual density and depth, it's not reflect all the border of tilt stage, so that resulting in horizontal derivative of non-absolute tilt derivative abnormal curve has been effected by by the thickness of tilting stage, the residual density and depth so that it's not reflect all the border of tilt stage, but horizontal derivative of non-absolute tilt derivative is able to reflect the shape of the tilt stage. In the experiment of fault imaging, horizontal derivative of non-absolute tilt derivative abnormal curve for the boundary and middle of fault has added unlimited extension tilted body which border reflect very clear, and that also reflect the depth of abnormal body, the thickness of fault and the shape of fault. And by comparing could know that however the angle of tilt body, thickness and other conditions, it's not be affected that abnormal curves display border and shape of fault exactly. In the unlimited and limited extension thick plate theory model, in the extension of an unlimited extension experimental tilt range model, the tilt horizontal derivative and the non-absolute tilt horizontal derivative get a better result in determining the borders of geological bodies areas and even the occurrence. Finally, in the integrated model, the above methods have been fully confirmed in the advantages of determining borders.Finally, Daolangheduge Xianghuang Banner of Inner Mongolia and hudag polymetallic mining region of the processing and interpretation of actual data, it is clear that the level of use of oblique derivative derivative and non-absolute level of oblique derivative derivative approach to the gravity anomaly map over more clearly shows the boundaries of geological bodies. In fact, conventional gravity anomaly map shows the boundary of the more prominent abnormal area is very small, but some small part of the unusual methods of these two regions highlights the anomaly, which is oblique derivative did not have, but also to meet the exploration the work of gravity anomaly data from some of the information received.Oblique derivative derivative levels can well reflect the geological body and the border section of the form to show that this theoretical model in the second part of chapter has been presented. Oblique derivative derivative approach the level of relative advantage or conventional gravity anomaly data have a certain advantage, and it shows that conventional gravity anomaly data can not be small in the boundary of the geological and cartridge showing the boundaries of geological bodies. The conventional method is only in the abnormal area can be gathered by the need to show that the boundary of the geological body of information. Non-absolute level of oblique derivative derivative methods in addition to having the same level of oblique derivative derivative as in determining the merits of the border, but also to the geological boundary strip in the middle shows the orientation and shape.