摘要
喀什凹陷是我国西部重要的含铀区,自中生代以来主要发生过5次重大构造事件,对该地区中—下侏罗统铀矿成矿及保矿具有重要意义,即晚三叠世有利的构造背景,早—中侏罗世有利的构造-沉积环境形成的有利岩性-岩相建造,晚侏罗世构造掀斜与古层间氧化带及铀矿化的形成,白垩纪—古近纪的保矿作用及新近纪以来的构造破坏与局部层间氧化带的形成与叠加,从而很可能在中—下侏罗统中形成一定规模受层间氧化带控制的砂岩型铀矿床。指出主要找矿靶区为库孜贡苏断陷以西的南天山山前,同时还有托云盆地。
Kashgar Sag is an important uranium bearing area in West China. Five important tectonic events since Mesozoic are significant to the formation and preservation of uranium mineralization in Middle-Lower Jurassic, i.e. favorable tectonic setting in Late Triassic, favorable lithology-lithofacies formed by the favorable tectonic-sedimentary environment in Early-Middle Jurassic, formation of structural tilting and interlayer oxidation zone and uranium mineralization in Late Jurassic, ore preservation from Cretaceous to Early Tertiary, structural destroy and reformation and supervision of local interlayer oxidation zone since Neogene. Large-scaled interlayer oxidation zone sandstone-type uranium deposit may be formed in Middle-Lower Jurassic. It is pointed out that the main prospecting target locates in the fore-mountain of South Tianshan Mountain to the west of Kuzigongsu Basin, and also Tuoyun Basin.
出处
《世界核地质科学》
CAS
2008年第1期7-12,共6页
World Nuclear Geoscience
