中国花岗岩类化学元素丰度及特征  

Abundances of chemical elements in granitoids of China and their characteristics

作　　者：史长义[1] 鄢明才[1] 刘崇民[1] 迟清华[1] 胡树起[1] 顾铁新[1] 卜维[1] 鄢卫东[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《地球化学》2005年第5期470-482,共13页Geochimica

基　　金：科技部社会公益研究专项项目(2001DIB10076)~~

摘　　要：在全国范围内750个有代表性的大中花岗岩类岩体上,采集了6080件样品,组合成768件组合样。所有样品完全采用无污染加工方案进行加工和制备。选用了以电感耦合等离子体质谱(ICP-MS)、仪器中子活化和X射线荧光光谱为主的多种先进的分析方法对这些花岗岩类样品进行了分析测试,实测元素近70种。使用国家一级地球化学标准物质和重复测试样品进行质量监控,确保了分析数据的准确性和可靠性。依据这些实测分析数据,计算并提出了中国花岗岩类和不同构造单元、不同时代花岗岩类的近70种化学元素或成分的丰度,探讨了中国花岗岩类和不同构造单元、不同时代花岗岩类元素丰度的特征。About 6 080 samples were collected mainly from about 750 large to middle representative granitoid bodies in whole China and they were combined into 768 composited samples for being analyzed in the laboratories.All the samples were processed and prepared by the contamination-free preparing scheme. About 70 elements of Ag, As, Au, B, Ba, Be, Bi, Cd, Cl, Co, Cr, Cs, Cu, F, Ga, Ge, Hf, Hg, In, Li, Mn, Mo, Nb, Ni, P, Pb,Rb, S, Sb, Sc, Se, Sn, Sr, Ta, Th, Ti, TI, U, V, W, Zn, Zr, SiO2, TiO2, AI2O3, Fe2O3, FeO, MnO, MgO,CaO, Na2O, K2O, P2O5, H2O^＋, CO2, Ce, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pr, Sin, Tb, Tin, Y and Yb were analyzed with multiple advanced reliable analytical methods relying mainly on ICP-MS, INAA and XRF. Nationalpreliminary geochemical certified reference materials such as GSR-1, GSR-2, GSR-4, GSR-5, GSR-14,GSS-9,GSD-9, GSD-la, GAu-10, GAu-ll, Au-2, GAu-8, GAu-9 and duplicates were used to monitor rigidly the analysis quality in order to ensure the accuracy and reliability of analytical data. Based on the actual analytical data, the total average chemical compositions and element abundances of about 67 chemical elements of SiO2, Al2O3, Fe2O3,FeO, MgO, CaO, Na2O, K2O, H2O^＋, CO2, TFe2O3, Ag, As, Au, B, Ba, Be, Bi, Cd, Cl, Co, Cr, Cs, Cu, F,Ga, Ge, Hf, Hg, Li, Mn, Mo, Nb, Ni, P, Pb, Rb, S, Sb, Sc, Se, Sn, Sr, Ta, Th, Ti, T1, U, V, W, Zn, Zr,La, Ce, Pr, Nd, Sin, Eu, Gd, Tb, Dy, Ho, Er, Tin, Yb, Lu and Y in China＇s granitoids, granitoids in different geotectonic units and different geological ages are calculated and presented in this paper. It is sufficiently discussed on the distribution patterns of petrochemical parameters, trace element contents and rare earth element distributions of the granitoids. δ value of China＇s granitoids is 2. 12, K/Na = 1.22, A/CNK = 1.1, C/ACF = 0. 13, ∑REE =168, LREE = 133.2, HREE = 15, LREE/HREE = 8.91, （La/Yb） N = 9. 34, δEu = 0. 597. Distribution patterns of element abundances in the granitoids of different geological ages are different. They have different fe

关 键 词：花岗岩类 元素丰度 中国 电感耦合等离子体质谱 

分 类 号：P591[天文地球—地球化学] P595[天文地球—地质学]