Method for identifying seabed hydrothermal sulfide ore points by utilizing gravity abnormal lines

Abstract

The invention discloses a method for identifying submarine hydrothermal sulfide ore points by using gravity anomaly lines, which comprises the following steps: importing gravity anomaly original griddata, and converting the gravity anomaly original grid data into a grid layer with corresponding required precision according to research requirements; calculating the gravity abnormal gradient direction, calculating the cumulative number of times of the grid gradient direction, obtaining a cumulative number of times of all grids in the calculation domain, and forming a new grid layer; starting toperform gradient calculation from the first grid unit by using a window, recording the maximum gradient direction of each grid according to the calculation result of the number of the existing gridsin the window, and recording the grid number of the grid in the maximum gradient direction; and calculating the frequency of gradient pointing of each grid unit by other grid units, and extracting a 0-value point to form a line which is a gravity anomaly line. The method has the beneficial effect that the spatial distribution of the ocean ridge hydrothermal sulfide ore points can be identified.

Description

technical field [0001] The invention belongs to the technical field of seabed hydrothermal mineralization geology, and relates to a method for identifying seabed hydrothermal sulfide ore points by using free air gravity anomaly lines. Background technique [0002] In the Atlantic Ocean, many previous studies (Rona et al., 1980, 2001; Bostrom et al., 1972; Batuyev et al., 1994; German et al., 1998; Bates, 2005, etc.) Background, ore body scale, mineralization process, etc., have been studied and reasoned. At present, AUV, ROV, TVG, acoustics, optics, geophysics and other hydrothermal information capture and acquisition methods used in hydrothermal investigation can only be measured in situ on site. If only this method is used to find hydrothermal points, it will lose The significance of economic prospecting. Therefore, changing ideas and strategies from mathematical methods, especially feature extraction methods, fully excavating hidden micro-anomaly information, so that it...

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