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为了对哈尔滨沙尘天气的物质来源进行追踪,对哈尔滨沙尘沉降物及其作为潜在源区的科尔沁沙地和松嫩沙地(<11μm和11~30μm粒级组分)进行了稀土元素分布特征的研究.结果表明:哈尔滨2002年沙尘物质的∑REE为189.67×10-6,2007年为175.57×10-6,2008年为174.68×10-6,2011年为181.35×10-6.沙尘沉降物的REE集中分布在一个很窄的范围,显示哈尔滨沙尘的来源相当稳定.沙尘沉降物的稀土元素分布模式十分相似,Eu较明显亏损(2002年、2007年以及2008年沙尘的δEu在0.71~0.75之间,2011年沙尘的δEu值为0.92),Ce弱负异常(δCe值在0.89~0.92之间,平均值为0.90).沙尘沉降物与潜在源区物质的REE含量、分布模式、特征参数以及δEu-ΣREEs、δEu-(LREE/HREE)和(LREE/HREE)-LaN关系图解均显示哈尔滨沙尘沉降物的REE组成与科尔沁沙地(特别是11~30μm粒级组分)十分接近,显示哈尔滨沙尘起源于科尔沁沙地而非松嫩沙地,科尔沁沙地对哈尔滨沙尘的物质贡献主要体现在11~30μm粒级组分.哈尔滨沙尘的科尔沁沙地起源的研究结果得到气象资料和气象记录的支持.
In order to trace the sources of dust in Harbin, the distribution of rare earth elements in dust and sediments in Horqin and Songnen Sandy Lands (<11μm and 11 ~ 30μm fractions) The results show that the ΣREE of dust and dust in Harbin was 189.67 × 10-6 in 2002, 175.57 × 10-6 in 2007, 174.68 × 10-6 in 2008 and 181.35 × 10-6 in 2011. The distribution of REE in dust-sediment is concentrated in a narrow range, showing that the source of dust in Harbin is quite stable. The pattern of rare earth elements in dust-sediment is very similar and Eu is significantly depleted (2002, 2007 and 2008) The δEu of dust is between 0.71 and 0.75, and the δEu value of sand and dust is 0.92 in 2011) and weak and weak anomaly of Ce (δCe values between 0.89 and 0.92 with an average of 0.90) .Dust sediments and potential source material REE content, distribution pattern, characteristic parameters, and δEu-ΣREEs, δEu- (LREE / HREE) and (LREE / HREE) -LaN maps show that REE composition of Harbin dustfall and Horqin sandy land (especially 11 ~ 30μm fraction) is very close, showing that Harbin sand dust originated in Horqin sandy rather than the Songnen sand, Cole Harbin sandy material contribution to the dust is mainly reflected in 11 ~ 30μm grain size components. The results of Horqin sandy origin Harbin dust was supported by meteorological data and weather records.