Integration analysis technique of multi data: An effective way of recognizing Uranium Metallogenic region
He Zhongi, Guo Xuetao , Hou jianxin, Wang Saiwei
Beijing research Institute of Uranium Geology
Beijing ,China
Abstract
Recognizing uranium metallogenic region is one important topic in the research of uranium metallogenic province the integration analysis technique of multi data based on the data collected mostly from remote sensing geology air borne magnetic and radioactive surveys and on image processing system is an effective way of recognizing uranium metallogenic region this paper tries to delineate the basic contents and application result of IATMD through recognizing a Mesco Cenozonic related uranium metallogenic region on north china Platform.
Introduction
Uranium metallogenic region is the most promising region for ore grade mineralization with in uranium metallogenic province .It has favorable geologic conditions for uranium metallogenic regions with in which one or more uranium deposits may be found.
Taking the recognition of Mesozoic to Cenozoic magmatisim related uranium metallogenic region on North region china platform as an example this paper tries to illustrate the application procedures and the results of IMTAD based mainly on remote sensing data and digital image processing system is composed of the analysis of geologic model for uranium metallogenic region 2 the selection of characteristic information of the best combination of multi data 5 the establishment of multi data image model and 6 the recognizant of uranium metallogenic region.
Geologic features
The most prominent geologic feature of uranium metallogenic provinces of eastern china lies in their younger ages of Mesozoic to Cenozoic period their formation is believed to be related to the strong interaction between pacific plate and Asian continental margin the uranium mineralization on north china platform is closely related to the Meso Cenozoic remobilization of structures and magmatism.
The study area is located on the northern margin of North China platform major types of rocks and average uranium content in the study are listed in table 1 a volcanic type uranium deposited was discovered in the area .uranium mineralization resulted from the gradual accumulation of uranium during the long term geological process in late Jurassic time the basement reeling resulted in the acid volcanism and the preliminary uranium enrichment in rhylites later on the magnetic hydrothermal solution from the cretaceous tertiary intermediate basic volcanism released uranium in the basement rocks and the over lying during its ascent on the other hand the surface water leached uranium in the r during its descent when the ascending magmata solution and descending metrics water met and mixed the physical chemicals conditions considerably changed there fore uranium precipitated from the mixed solution and uranium mineralization occurred (Fig. 1).
Table 1. Major types rocks and their average uranium content in the study area.
| Period |
Lithology |
Average U content(ppm) |
| Quaternary |
Sediments, Debris |
|
| Tertiary |
Basalts |
|
| Cretaceous |
Andesites |
1.8 |
| Late Jurassic |
Upper rhyolitic lava |
5.4 |
| Middle trachytic lava |
3.6 |
| Lower rhyolitic tuff and andesitic rocks |
1.6 |
| Precambrain |
Biotite granulite , Hornblende plagiogneiss,
Potassium migmatite |
1.7-4.0 |
Fig. 1 Geological Model of Uranium Mineralization in the study area
