摘要
准噶尔盆地位于新疆北部,是我国北方重要的砂岩型铀矿产出盆地之一。来自古生物、沉积体系、孢粉的证据显示,自中生代以来该盆地古气候经历了5次的潮湿、半潮湿-干旱、半干旱的古气候演化阶段;铀矿化产出层位为潮湿-半潮湿古气候环境控制下的产物,潮湿-半潮湿古气候环境之后的干旱-半干旱古气候环境则有利于铀的迁移及富集成矿。准噶尔盆地的主硬铀矿找矿目的层为盆地的东缘、南缘和两北缘的侏罗系八道湾组、三工河组、西山窑组和头屯河组;次要找矿目的层为西北缘的自垩系吐谷鲁群、北部的古近系乌伦古河组。
Located in the north of Xinjiang, Junggar basin is on important basins which produce sandstone type uranium deposit in the north of China. Evidences from paleontology, sedimentary system and sporopollen show that palaeoclimate around the basin had experienced five time alternation from arid to humid during the Mesozoic, and that uranium producing formations were formed under the semihumid and humid paleoclimate environment, arid climate after the humid was propitious to uranium migration and enrichment. The main uranium prospecting target strata are the Badaowan Formation, the Sangonghe Formation, the Xishanyao Formation and the Toutunhe Formation of Jurassic in the eastern, southern and northwest margins of the basin. The secondary target strata are the Tugulu Group of Cretaceous in the northwest margin and the Wulunguhe Formation of the Paleogene in the north of the basin.
出处
《世界核地质科学》
CAS
2016年第3期140-145,共6页
World Nuclear Geoscience
关键词
准噶尔盆地
砂岩型铀矿
中新生代
古气候演化
Junggar basin
sandstone type uranium deposit
Mesozoic-Cenozoic
the paleoclimate evolution
