本文選題：鄂爾多斯盆地南緣　切入點：延長組　出處：《地質(zhì)通報》2016年09期

【摘要】：微量、稀土元素和有機地球化學(xué)參數(shù)對于揭示油頁巖沉積環(huán)境、古氣候等沉積成礦作用、預(yù)測油氣、油頁巖資源潛力具有重要意義。對鄂爾多斯盆地南部延長組長7油頁巖獲得的地球化學(xué)參數(shù)進行研究,油頁巖微量元素與地殼平均值及其他地區(qū)油頁巖相比,W、Mo、As、Sb、U等元素明顯富集,Sc、Cr、Ni、Cl等元素明顯虧損。油頁巖稀土元素總量較低,輕稀土元素富集,重稀土元素虧損,稀土元素較球粒隕石發(fā)生了明顯分異,較北美頁巖分異不明顯。油頁巖有機質(zhì)類型為Ⅰ型和Ⅱ_1型,以Ⅱ_1型為主,有機質(zhì)豐度達到最好級,成熟度為低成熟-成熟。通過對這些地球化學(xué)參數(shù)及特征的進一步分析,獲得以下認識:1長7油頁巖是在溫暖潮濕的氣候條件下,形成于陸相淡水深湖-半深湖還原環(huán)境中,這種沉積環(huán)境有利于油頁巖有機質(zhì)的富集和保存;2本區(qū)不具備形成油氣田的潛力,具備形成中-高品級的特大型油頁巖礦床的潛力。
[Abstract]:Trace, rare earth elements and organic geochemical parameters are useful to reveal sedimentary mineralization in oil shale and paleoclimate, and to predict oil and gas, The potential of oil shale resources is of great significance. The geochemical parameters obtained from Yanchang No. 7 oil shale in southern Ordos Basin are studied. Compared with the average value of crust and other oil shale, the trace elements of oil shale are obviously enriched in the elements such as SCC, Cr, NiCl and so on. The total amount of rare earth elements in oil shale is lower, light rare earth element is enriched, and heavy rare earth element is depleted. Compared with chondrites, rare earth elements show obvious differentiation, but are less distinct than that of North American shale. The types of organic matter in oil shale are type 鈪，

本文編號：1664146