巴音戈壁盆地塔木素地段砂岩型铀矿成矿条件及找矿前景分析

文章主要从铀成矿的区域地质背景、成矿砂体特点、铀成矿作用类型和后生改造作用等方面对巴音戈壁盆地塔木素地段的铀成矿进行分析.笔者指出,该区铀矿形成于拉分构造背景,构造的反转作用及块段差异性明显,成矿砂体为辫状三角洲砂体,铀矿化类型存在泥岩型和砂岩型两种,以砂岩型为主.铀矿化后的碳酸盐胶结作用普遍发育.综合分析认为,本区具有铀成矿的各种有利条件,存在着寻找可地浸砂岩型铀矿的前景.

Analysis of metallogenic condition and prospecting potential of sandstone type uranium deposit in Tamusu district of Bayinggebi basin

Uranium metallogenic condition in Tamusu district of Bayinggebi basin is analyzed in the reginal geological setting, feature of ore-hosted sandbody, types of uranium mineralization and later alteration. It is founded that uranium mineralization was formed in pull-apart structure background with obvious structural reversion and block differnces, the ore-hosted sandbody belong to braided river-delta system, uranium mineralizations are of sandstone type and mudstone type among which sandstone type is the main. There was widespread carbonate cementation after uranium mineralization. This district is believed to bear all kind fevorable conditions for uranium mineralization and is propective for searching insitu leaching sandstone type uranium deposit.