| Rely on by the project, Uranium Potential Evaluation and Prospective Prognosis in Liaodong metallogenic belt from China Nuclear Geological Bureau, the paper has collected and studied a lot of geological data about study area. Combine the latest research achievements, establish integrated regional mineralization model, assess metallogenic potential and prospecting target area prognosis with computer software.Uranium Potential Evaluation in Liaodong metallogenic belt guided by the geological theory, making a study of geological environment, characteristic of uranium mineralization and metallogenic regularity at regional level. The paper has in the basis of summarized characteristics of Lianshanguan typical deposits and Saima typical deposits, established mineralization model of study area. Furthermore, analyzing such a wide range of data as geological, geophysical, geochemical and aeromagnetic data, etc. The software of MapGIS and MRAS serving as a basic platform, by the method of mathematical statistics analysis. These factors involve controlling-containing ore structures, uranium-rich strata and rocks, uranium deposits, uranium point and abnormal of airborne radiation. etc. Eventually, use the method of Characteristic Analysis and Weight of Evidence to positioning and evaluating metallogenic potential of study areas.Following the basic principles and instructions, the paper has delineated 22 favorable targets by means of Characteristic Analysis. Considering the actual geological conditions and field survey, the paper has in fact gotten 13 targets after winnowed. Besides, according to ore-forming probability and mineralization clues, the targets have been classified into three levels of A, B and C. Thus,4 pieces of targets lie in A category,5 pieces in B, and 4 pieces in C. The targets in the A appear the most favorable, which are mostly distributed around or outside the known deposits, whereas those within the B have relatively better conditions with all sorts of metallogenic factors and ore points, those within the C being potential to some extent.We have some following understanding, in work process, on the whole area geological conditions: 1. Study area have complex geological evolution and diversity ore types, uranium deposit including single uranium type (Lianshanguan), Uranium - thorium - rare earth mixed rock ore deposits (Saima), Iron type uranium deposits (Gaojiagou,Gongchangling). In addition, regional also distribution gold, silver, lead, zinc, etc .2. There are two kinds mineral type in intermediate-acid rock of Liaodong area:(1) Granite take-out type include Lianshanguan,Gaojiagou,Xuanlinghou etc. (2) Alkaline rock type include Saima.3. There are two Uranium metallogenic times,first time is 1900Ma, Main is Granite take-out type.Second time is 210Ma, Main is Alkaline rock type.4. There are two Uranium metallogenic belt: North belt and South belt. North belt have a close relationship with intermediate-acid rock metallogenic, It is name metallogenic belt. It controls all uranium deposits in Liaodong area. The two tectonic mineralization belt are consistent with two borders of Liaodong rift ,The essence is the Liaodong rift deep fault control the distribution of Uranium metallogenic belt.5. Granite take-out type of uranium mineralization in research area be controlled with Archaeozoic era mix granite,mainly distributed in internal and external contact belt.6. Alkaline rock type of uranium mineralization Originate in inside belt which Saima alkaline rock contact with Liaohe group of marble, Mainly occur in Viridans syenite. |
PDF Full Text Request