The Research Of Dual-frequency IP Method And Application On Special Physiognomy Of West China

The supply of the mineral resources especially nonferrous metals resources is the assurance of the sustainable development of our country, with the improvement of prospecting in the Middle Eastern developed area resource, the resources suitable for exploration are exhausted day by day, and accompanied by the implementation of China West Regions Development Strategy, the mineral resources exploration in the deep underground and the west China becomes the important subject for research. The characteristics of high sea level, complicated topography, traffic inconvenient, dry climate, difficult earthing condition, and great temperature difference in morning and evening in west China give more higher requirement for the resource exploration technology and instruments. The thesis sets out to the resource requirement of mineral products from national economic development, on the basis of systematically analyzing, summarizing, studying of the induced polarization method especially dual-frequency IP theory, and based on the basic theories, observing technology, field work, instrument development and data processing and explanation etc, a high-efficient technology system which is suitable for resource exploration in West special physiognomy has been put forward, and some very good results have been made in the western region . The main content of the thesis is as follows:(1) As the theoretical foundation, the thesis has explained the characteristic of the special physiognomy in the west in system, and taken systematic summary and study to the induced polarization method especially the dual-frequency IP theory, and taken detailed research on the effect of the current change of the dual-frequency IP to the apparent amplitude-frequency ratio and the anomaly characteristic of the dual-frequency IP. And then has proved the characteristics of high precision, strong anti-interference ability, low current influence, portable observing instrument, good stability and consistency , weak electromagnetic coupling effect and non-linear, and has carried out the research on distinguishing the ore and non-ore anomaly through the .pseudo-random multi-frequency IP method.