本文選題：微量元素 + 物源示蹤��； 參考：《煤田地質(zhì)與勘探》2017年03期

【摘要】：為了研究鄂爾多斯盆地東緣臨興地區(qū)煤系泥巖微量元素特征及其對沉積、物源及古氣候方面的指示意義,采用ICP-MS和ICP-AES對18個泥巖樣品做微量元素分析。結(jié)果表明:微量元素中Li、Sc、Nb和Th等相對富集,而Sr、Rb、Ba和Cs等相對虧損,Be、Co、Zn和Mo等元素和地殼黏土巖中元素的平均含量相當(dāng);聚類距離選擇為25和11時,微量元素的"Q"型聚類結(jié)果與沉積相劃分結(jié)果吻合;Th/Sc、Th/U-Th、K2O-Rb以及多元素物源判別圖等表明,研究區(qū)物源來自上地殼,以長英質(zhì)物源和再旋回沉積物為主,有少量中基性物質(zhì)的加入,且含砂率變化和重礦物組合的分布特征表明物源來自于臨興地區(qū)北部;利用泥巖Sr/Cu值及Sr、Ti和P等特征元素的含量變化推測,臨興地區(qū)從晚石炭世到早二疊世氣候以濕潤為主,且向干熱轉(zhuǎn)變。
[Abstract]:In order to study the trace element characteristics of coal series mudstone in Linxing area on the eastern margin of Ordos Basin and its significance to sediment, provenance and paleoclimate, the trace elements of 18 mudstone samples were analyzed by ICP-MS and ICP-AES. The results show that the relative enrichment of trace elements such as Li-sco NB and Th, while the relative depletion of elements such as Sr, RB, Ba and Cs are similar to the average contents of elements in crustal clay rocks, and the clustering distances are 25 and 11:00, respectively. The results of "Q" cluster of trace elements are in agreement with the results of sedimentary facies division. The results of Th- / ScScScThU-ThU-ThU / K _ 2O-Rb and multi-element provenances show that the source of trace elements in the study area is from the upper crust, mainly from felsic and recyclic sediments, with the addition of a small amount of intermediate and basic materials. The variation of sand content and the distribution of heavy mineral assemblage indicate that the material source came from the northern part of Linxing area, and based on the variation of Sr/Cu value of mudstone and the content change of Sr, Ti and P, it can be inferred that the climate of Linxing area from late Carboniferous to early Permian is mainly humid. And turn to dry heat.
【作者單位】： 山東省核工業(yè)二七三地質(zhì)大隊(duì);中國礦業(yè)大學(xué)資源與地球科學(xué)學(xué)院;中國礦業(yè)大學(xué)煤層氣資源與成藏過程教育部重點(diǎn)實(shí)驗(yàn)室;中聯(lián)煤層氣有限責(zé)任公司;
【基金】：國家自然科學(xué)基金項(xiàng)目(41672146,41541046) 國家科技重大專項(xiàng)課題(2016ZX05044-002,2016ZX05066-001)~~
【分類號】：P618.11
，

本文編號：1826262