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Method for identifying and positioning ancient riverway under basalt coverage

A technology for identifying and positioning basalts, applied in the field of uranium mineralization prediction, can solve problems such as the inability to identify and locate ancient river channels, and achieve the effects of environmental protection identification and positioning, high accuracy, and a high starting point

Active Publication Date: 2020-04-21
BEIJING RES INST OF URANIUM GEOLOGY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies of the prior art, and provide a method for identifying and locating paleo-channels covered by basalt, which is used to solve the technical problem in the prior art that it is impossible to accurately identify and locate paleo-channels covered by basalt

Method used

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  • Method for identifying and positioning ancient riverway under basalt coverage

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Embodiment

[0067] Step 1: Find out the temporal and spatial distribution characteristics of surface basalts, and determine the possible distribution direction of paleo-channels

[0068] Step 1.1: Identify the temporal and spatial distribution characteristics of surface basalts

[0069] Collect a 1:200,000 geological and mineral map of the study area, delineate the area covered by surface basalt on the map; determine the age of basalt eruption on the comprehensive stratigraphic columnar profile; comprehensively find out the temporal and spatial distribution characteristics of surface basalt.

[0070] Step 1.2: Determine the possible distribution direction of paleochannels under basalt cover

[0071] On the 1:200,000 geological and mineral map, find out the distribution characteristics of the eruptive basalt craters, and combine the temporal and spatial distribution characteristics of the surface basalts found in step 1.1 to determine the distribution trend of the craters and the main axis...

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Abstract

The invention belongs to the technical field of uranium mineralization prediction, and particularly relates to a method for identifying and positioning an ancient riverway under basalt coverage. The method comprises the steps of 1, finding out spatial and temporal distribution characteristics of basalt on the ground surface and determining a possible distribution direction of the ancient riverway,wherein the step includes the sub-steps of 1.1, finding out spatial and temporal distribution characteristics of basalt on the ground surface, and 1.2, determining the possible distribution directionof the ancient riverway under basalt coverage; 2, determining an ancient riverway distribution pre-selection area, wherein the step includes the sub-steps of 2.1, finding out a structure, a vegetation zone and a water system zone of a basalt coverage area, and 2.2, determining an ancient riverway distribution pre-selection area; 3, identifying and positioning the ancient riverway covered by basalt, wherein the step includes the sub-steps of 3.1, collecting aviation transient electromagnetic data, 3.2, identifying and positioning the ancient riverway covered by basalt, 3.3, determining the horizon in which the ancient riverway is developed, and 3.4, finding out the scale of the ancient riverway; and 4, drilling to verify the ancient riverway.

Description

technical field [0001] The invention belongs to the technical field of uranium mineralization prediction, and in particular relates to a method for identifying and locating paleo-channels covered by basalt. Background technique [0002] Paleochannel-type uranium deposits covered by basalt are an important subtype of sandstone-type uranium deposits. They have the characteristics of shallow burial depth, high grade, and economical mining. They have received great attention from foreign uranium geologists. 22 uranium deposits and 136 ore points of this subtype have been discovered in China. In my country's Tengchong Basin, the Longchuanjiang paleo-channel uranium deposit covered by basalt has also been discovered, showing a good prospect for sandstone-type uranium deposits. However, in the process of identifying and locating paleo-channel-type uranium deposits, the paleo-channel is shielded by the overlying basalt due to the basalt subtype of ore-forming geological body. In ad...

Claims

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Application Information

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IPC IPC(8): G01V3/08G01V3/38
CPCG01V3/083G01V3/38Y02A90/30
Inventor 李子颖刘武生李西得余长发汪硕
Owner BEIJING RES INST OF URANIUM GEOLOGY
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