本文選題：微束X射線(xiàn)熒光光譜分析 + 鐵錳結(jié)核��； 參考：《光譜學(xué)與光譜分析》2017年06期

【摘要】：在中國(guó)南方第四紀(jì)紅土剖面中普遍發(fā)育一種黑褐色,形狀規(guī)則或者不規(guī)則的新生體,由于其含有較高的Fe和Mn元素而被稱(chēng)為鐵錳結(jié)核。鐵錳結(jié)核被認(rèn)為是土壤中溫度、水分、氧化還原條件變化而形成的土壤新生體,因此它被認(rèn)為是環(huán)境信息的良好載體。尤其是結(jié)核內(nèi)部發(fā)育的環(huán)帶狀構(gòu)造,被認(rèn)識(shí)是結(jié)核形成過(guò)程氣候干濕變化的結(jié)果。因此對(duì)結(jié)核內(nèi)部微小區(qū)域的研究,有助與理解紅土母質(zhì)的風(fēng)化過(guò)程以及結(jié)核的形成原因。X射線(xiàn)熒光光譜分析在20世紀(jì)80年代初已是一種成熟的分析方法,是實(shí)驗(yàn)室、現(xiàn)場(chǎng)分析主、次量和痕量元素的首選方法之一。運(yùn)用帕納科Zetium X射線(xiàn)熒光光譜儀的微小區(qū)域分析工具對(duì)銅陵第四紀(jì)紅土中結(jié)核內(nèi)部由核心至邊緣的主量元素分布狀況進(jìn)行分析,結(jié)果表明,XRF微小區(qū)域分析功能可以快速有效的分析樣品內(nèi)元素的分布狀況。結(jié)核內(nèi)部元素分布情況來(lái)看,銅陵剖面內(nèi)鐵錳結(jié)核內(nèi)部顏色深淺變化主要是由于Mn元素含量的變化而引起的。結(jié)核的核心Mn元素含量最高,由核心向邊緣呈現(xiàn)高低交替變化特征。指示結(jié)核形成初期,由于氣候相對(duì)干旱,Mn元素由低價(jià)離子態(tài)氧化成高價(jià)化合物后發(fā)生淀積。結(jié)核內(nèi)部淺色環(huán)帶Si和Al元素含量明顯較深色環(huán)帶高,可能代表了相對(duì)濕潤(rùn)的氣候時(shí)期。
[Abstract]:In the Quaternary laterite section of southern China, a black-brown, regular or irregular neophyte is developed, which is called ferromanganese nodules because of its high Fe and mn contents. Ferromanganese nodules are considered to be soil neovasites resulting from the changes of temperature, moisture, and redox conditions in the soil, so it is considered as a good carrier of environmental information. In particular, the circle-belt structure developed within nodules is recognized as the result of climatic dryness and wetness during the formation of nodules. Therefore, the study of microregions inside nodules helps to understand the weathering process of the parent material of laterite and the causes of the formation of nodules. X-ray fluorescence spectroscopy (XRF) analysis was a mature analytical method and a laboratory in the early 1980s. One of the preferred methods for field analysis of primary, secondary and trace elements. The distribution of principal elements from core to edge of nodules in Quaternary laterite in Tongling was analyzed by means of the small area analysis tool of Panako Zetium X-ray fluorescence spectrometer. The results show that XRF can be used to analyze the distribution of elements in the samples quickly and effectively. The distribution of elements in the nodules is mainly caused by the change of mn content in the iron manganese nodules in Tongling section. The content of mn in the core of nodules is the highest, and the change from core to edge is alternately high and low. It is indicated that mn element was oxidized from low valence ion state to high valence compound in the early stage of nodule formation because of the relatively dry climate. The contents of Si and Al elements in the light colored ring zone are obviously higher than those in the deep color ring zone, which may represent a relatively humid climatic period.
【作者單位】： 華東師范大學(xué)地理科學(xué)學(xué)院;安徽師范大學(xué)國(guó)土資源與旅游學(xué)院;安徽師范大學(xué)環(huán)境與地理信息工程安徽省工程技術(shù)研究中心;浙江師范大學(xué)地理與環(huán)境學(xué)院;
【基金】：the National Natural Science Foundation of China(41201008,41371032)
【分類(lèi)號(hào)】：O657.34;S153
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本文編號(hào)：2087056