Paleoriverway rapid delineation method based on magnetic weight information

Abstract

The invention relates to a paleochannel rapid delineation method based on magnetic-gravity information, and the method comprises the following steps: collecting the previous geological data information of a research region, and analyzing the inheritance relation among a base structure form, a cover layer structure form, and a paleochannel development space; carrying out area high-precision aviation magnetic method measurement in a research area; acquiring an aeromagnetic delta T value and grid data thereof; acquiring aeromagnetic delta T and Bouguer gravity anomaly corresponding processing results, and inverting the minimum burial depth of the magnetic substrate; deducing and explaining morphological characteristics of a main fracture structure and a concave-convex structure, and establishing a paleochannel interpretation mark based on magnetic weight information by comparing magnetic weight and electromagnetic exploration deduction results according to an inheritance relation; delineating the ancient river channel and the distribution range thereof. The method is low in cost, short in period and accurate in control range, and can quickly delineate the distribution characteristics of the paleoriverway in a large-range region. And meanwhile, construction exploration is almost not required to be carried out on the research area, so that the surface environment of the research area is not damaged.

Description

technical field [0001] The invention relates to a paleo-channel exploration technology, in particular to a method for quickly delineating a paleo-channel based on magnetic-gravity information. Background technique [0002] Airborne magnetic measurement (referred to as "aeromagnetic") and gravity measurement are important components of geophysical methods. The former is not only the most effective method for directly detecting magnetic solid minerals, but also the rapid identification of large-scale regional structural background, A conventional combination method for revealing stratigraphic structure and delineating the distribution of concealed igneous rocks. With the continuous improvement of measurement accuracy and post-processing technology, the leading role of aeromagnetic and gravity in delineating the structural shape and division of basins has become more and more prominent. The structural division of major basins in my country is usually firstly delineated based on...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for quickly delineating paleo-channels based on magnetic-gravity information to solve the problem of high cost and inaccurate control range when locating paleo-channels, a key ore-controlling element, in the existing main methods for sandstone-type uranium deposit exploration. , Problems easily restricted by construction conditions

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