华北与黔西地区晚古生代煤层中铂族元素赋存状态及来源  

Occurrence and Origin of Platinum Group Elements in Coals in West Guizhou Province and North China

作　　者：代世峰[1] 任德贻[1] 张军营[2] 李生盛[1] 张霞[1] 

机构地区：[1]中国矿业大学,北京校区100083 [2]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《地质论评》2003年第4期439-444,共6页Geological Review

基　　金：国家自然科学基金(编号40202014;40072054)

摘　　要：运用电离耦合等离子体质谱仪(ICP-MS)对中国华北和黔西地区晚古生代煤系中54个样品的铂族元素(PGEs)进行了分析。分析结果表明,煤中铂族元素主要是通过岩浆热液活动、低温热液流体、同沉积火山灰、陆源碎屑输入和海水等诸种地质作用形成的,前3种作用是造成煤中铂族元素异常的主要原因。低含量的铂族元素(正常背景值)主要来源于硅质陆源区,煤中铂族元素的背景值为:Ru=0.005μg/g,Rh=0.014μg/g,Pd=0.181μg/g,Ir=0.001μg/g,Pt=0.037μg/g。煤中铂族元素以Pt-Pd分配模式为特征,并且Pd>Pt,Pd>>Ru、Rh、Ir,其中Pd在煤中的背景值约为地壳平均值的18倍。Pd、Pt与煤灰分呈正相关,表现出它与无机矿物的亲和性。The platinum group elements (PGEs) in 54 samples from the Late Paleozoic coal-bearing measures in western Guizhou Province and North China were studied using the inductively-coupled plasma mass spectrometry (ICP-MS). The analytical results reveal that there are five sources of PGEs in coals: magmatic hydrothermal activation, low-temperature hydrothermal fluid, synsedimentary volcanic ash, erogenous supply, and seawater. The former three sources can lead to enrichment of PGEs in coals. The low contents of PGEs mainly originate from terrigenous supply. The background values of Ru, Rh, Pd, Ir and Pt are 0. 005μg/g, 0. 014μg/g, 0. 181μg/g,0. 001μg/gand 0. 037μg/g, respectively. The distribution of PGEs in coals is characterized by Pd-Pt pattern, and the content of Pd is higher than that of Pt, and far higher than those of Ru, Rh and Ir. The Pd content is about 18 times as high as that in the earth crust. The positive relationship between Pd, Pt and ash shows that the PGEs are of affinity to minerals.

关 键 词：华北地区 晚古生代 煤层 铂族元素 赋存状态 地质作用 贵州 

分 类 号：P618.11[天文地球—矿床学]