Haidewula is a medium volcanic rock type uranium deposit newly discovered in the east Kun-lun area in Qinghai province.This paper is based on regional geology and the background,local geological characteristics of the study area and geological characteristics of the uranium deposit to discuss metallo-genic structural background,the rock-forming time and genesis of the uranium deposit.Geotectonically the deposit is located at subduction complex at South slope of east Kunlun mountain of the South Kunlun junction zone of Qin-Qi-Kunlun orogenic belt at intersection of Tethys and North China platform tectonic realms.Uranium mineralization is closely related to intermediate-basic and acidic volcanic rock.Haidewu-la uranium deposit is controlled by regional medium-large faults.Ore bodies occur mainly in NW,NE sub-faults related to regional NWW fault.Mineralization bodies are thick and densely distributed with higher uranium grade.Mineralization is mainly composed of cataclastic rock,alteration rock reddening and puritization.Mineralogy of the deposit is simple.Pitchblende is the main uranium mineral.In addi-tion to uranium no other by-product elements occur.Isotropic dating and regional correlation show that volcanic rock of the deposit was formed in Late Triassic Epoch.Genetically the deposit is a hydrothermal uranium deposit.
关键词
铀矿床/火山岩/地质特征/矿床成因/海德乌拉地区/青海省
Key words
Uranium deposit/volcanic rock/geological characteristics/deposit genesis/Haidewula ar-es/Qinghai province
维普
万方数据