發(fā)布時間：2018-06-08 14:22

  本文選題：滇西地區(qū) + 戶撒盆地��； 參考：《礦物巖石地球化學(xué)通報》2017年04期

【摘要】：滇西地區(qū)戶撒盆地芒棒組新近發(fā)現(xiàn)有砂巖型鈾礦化。為了開展砂巖型鈾礦的進(jìn)一步找礦工作,對芒棒組第三段泥巖樣品的主量元素、微量元素和稀土元素進(jìn)行了測試分析,并對芒棒組的沉積物源及其風(fēng)化作用特征進(jìn)行了探討。結(jié)果表明,戶撒盆地芒棒組第三段泥巖組成較少受成巖作用影響,樣品較完整的保存了物源和風(fēng)化作用信息;芒棒組第三段碎屑沉積巖物源主要為周緣燕山期花崗巖,少量為高黎貢山群變質(zhì)巖;芒棒組第三段碎屑沉積巖為活動構(gòu)造環(huán)境下再循環(huán)沉積物的快速沉積產(chǎn)物,其源巖經(jīng)歷了強(qiáng)烈的化學(xué)風(fēng)化作用,沉積期古氣候總體為溫暖、潮濕環(huán)境。
[Abstract]:Sandstone-type uranium mineralization has recently been discovered in the Mangwan formation of the Husa basin in western Yunnan. In order to carry out further prospecting for sandstone-type uranium deposits, the main elements, trace elements and rare earth elements of mudstone samples in the third member of the Manggang formation were tested and analyzed, and the sediment source and weathering characteristics of the Manggang formation were discussed. The results show that the mudstone composition of the third member of the Mangbang formation in the Husa basin is less affected by diagenesis, and the samples have completely preserved the information of provenance and weathering, and the third member of the Mangbang formation is mainly derived from the Yanshanian granites in the peripheral margin. A small amount of metamorphic rocks in the Gaoligongshan Group, the clastic sedimentary rocks of the third member of the Mangbang formation are the rapid depositional products of the recirculating sediments in the active tectonic environment, the source rocks have experienced strong chemical weathering, and the paleoclimate in the sedimentary period is generally warm. A wet environment.
【作者單位】： 中國地質(zhì)科學(xué)院;中國地質(zhì)大學(xué)(北京);中國地質(zhì)調(diào)查局成都地質(zhì)調(diào)查中心;
【基金】：中國地質(zhì)調(diào)查局地質(zhì)調(diào)查項目(121201010000150006)
【分類號】：P588.22;P619.14

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